We were supposed to sample the regular LTER stations by Zodiac yesterday, but this was the view of Arthur Harbor as of yesterday evening:
No possible way to get a zodiac through all that. We’ll have to wait until the wind comes up (but not too much…) and blows it out. In lieu of our regular sampling routine we made another visit to our ice station. The ice station has been essential this year, and we feel truly lucky to have it. We’ve made only three forays by zodiac to the regular sampling stations, but we’ve made it to the ice station six times. Originally we only planned to visit once or twice.
Scientifically this has the potential to be a real coup. We’ve managed to observe the onset of the spring bloom underneath the ice, in comparison with the delayed onset in open water, and a transition of the under-ice phytoplankton population from potentially mixotrophic cryptophytes to phototrophic diatoms. Today we observed the plot thicken further still. We knew that something was different because our filters were clogging much faster than usual, but we didn’t know what until we got back to the lab.
When we visited the ice station a week ago the phytoplankton community was largely composed of centric diatoms like these:
I spent quite a while on the microscope yesterday evening and couldn’t find a single centric diatom. Or rather I couldn’t find a single live centric diatom. Here’s a typical view from a water sample taken below the ice yesterday.
The large blob in the center of the image is, I’m willing to bet, the remains of one of these diatoms. You can see a stream of cytoplasm trailing off to the right, and the bright area is what remains of the nucleus (the stain used to make the image fluoresces when bound to DNA). They’re difficult to make out in this image, but the stream and the remainder of the cell are heavily colonized by bacteria. While all the centric diatoms died off a number of chain-forming pennate diatoms remained, like the Chaetoceros to the left in this image. So there was some kind of selective mortality. At this stage we have no way of determining the cause, but my guess is a viral attack – the algal equivalent of a flu epidemic. Phytoplankon viruses haven’t received a lot of study as of yet, in large part because of the difficulty in studying them and the complexity of phytoplankton ecology, but they probably play a major role in phytoplankton population dynamics, and by proxy the marine carbon cycle.
Later today we’ll have a sense of how much carbon the bacterial population is taking up as a result of this early collapse of the phytoplankton bloom (how much bacterial production is occurring). My guess is it will be up quite a bit from the last time that we sampled. Phytoplankton are the primary source of food for marine bacteria, and aged or infirm phytoplankton are quickly colonized by marine bacteria that specialize in scavenging these cells. Cell lysis is the final step in this process, and the high quality biomass inside phytoplankton cells can fuel a lot of bacterial production. Bacterial abundance is up and it was likely bacteria, and all the goopy cytoplasm from lysed diatoms, that clogged our filters yesterday.
Macroscopically it was an exciting sampling day as well. The southern elephant seals seem to be abundant this year. No one knows if the numbers are really up, or if they’ve arrived a little earlier than usual, or if they’re just being more sociable than normal, but they’re all over the ice and the station. Usually they don’t take much notice of people, but we attracted the attention of a small (fortunately) one yesterday. On land elephant seals move in 10 m lurching “sprints” with very long rest periods; not the most graceful creatures out of the water. We could see this one making a beeline towards us from a long way off, and had plenty of time to ponder what to do if it tried to join our sampling operation. As it got closer we were relieved to see that it wasn’t a mature bull (which get territorial and can top out at well over 3 tons). We made a line of ski poles and snowshoes, which was enough to deflect its course around us.
Shortly after the elephant seal departed we were joined by the juvenile crabeater seal pictured below, the first of that species that I’ve seen this season (thanks to the birders for clarifying that this was a crabeater and not a leopard seal – despite the predation of the latter on the former the two species are closely related and difficult to tell apart).
If you like pictures of Adélie penguins, and really, who doesn’t, Palmer Station’s seasonal penguin cam is now operational. Check it out to view all the stages in the penguin life cycle in all their glory…
Whenever the focus is on climate change, as it is at this month’s Paris climate conference, tough questions are asked concerning the costs of cutting carbon emissions, the feasibility of transitioning to renewable energy, and whether it’s already too late to do anything about climate change. We posed these questions to Laura Segafredo, manager for the Deep Decarbonization Pathways Project. The decarbonization project comprises energy research teams from 16 of the world’s biggest greenhouse gas emitting countries that are developing concrete strategies to reduce emissions in their countries. The Deep Decarbonization Pathways Project is an initiative of the Sustainable Development Solutions Network.
- Will the actions we take today be enough to forestall the direst impacts of climate change? Or is it too little too late?
There is still time and room for limiting climate change within the 2˚C limit that scientists consider relatively safe, and that countries endorsed in Copenhagen and Cancun. But clearly the window is closing quickly. I think that the most important message is that we need to start really, really soon, putting the world on a trajectory of stabilizing and reducing emissions. The temperature change has a direct relationship with the cumulative amount of emissions that are in the atmosphere, so the more we keep emitting at the pace that we are emitting today, the more steeply we will have to go on a downward trajectory and the more expensive it will be.
Today we are already experiencing an average change in global temperature of .8˚. With the cumulative amount of emissions that we are going to emit into the atmosphere over the next years, we will easily reach 1.5˚ without even trying to change that trajectory.
Two degrees might still be doable, but it requires significant political will and fast action. And even 2˚ is a significant amount of warming for the planet, and will have consequences in terms of sea level rise, ecosystem changes, possible extinctions of species, displacements of people, diseases, agriculture productivity changes, health related effects and more. But if we can contain global warming within those 2˚, we can manage those effects. I think that’s really the message of the Intergovernmental Panel on Climate Change reports— that’s why the 2˚ limit was chosen, in a sense. It’s a level of warming where we can manage the risks and the consequences. Anything beyond that would be much, much worse.
- Will taking action make our lives better or safer, or will it only make a difference to future generations?
It will make our lives better and safer for sure. For example, let’s think about what it means to replace a coal power plant with a cleaner form of energy like wind or solar. People that live around the coal power plant are going to have a lot less air pollution, which means less asthma for children, and less time wasted because of chronic or acute diseases. In developing countries, you’re talking about potentially millions of lives saved by replacing dirty fossil fuel based power generation with clean energy.
It will also have important consequences for agricultural productivity. There’s a big risk that with the concentration of carbon and other gases in the atmosphere, agricultural yields will be reduced, so preventing that means more food for everyone.
And then think about cities. If you didn’t have all that pollution from cars, we could live in cities that are less noisy, where the air’s much better, and have potentially better transportation. We could live in better buildings where appliances are more efficient. And investing in energy efficiency would basically leave more money in our pockets. So there are a lot of benefits that we can reap almost immediately, and that’s without even considering the biggest benefit—leaving a planet in decent condition for future generations.
- How will measures to cut carbon emissions affect my life in terms of cost?
To build a climate resilient economy, we need to incorporate the three pillars of energy system transformation that we focus on in all the deep decarbonization pathways. Number one is improving energy efficiency in every part of the economy—buildings, what we use inside buildings, appliances, industrial processes, cars…everything you can think of can perform the same service, but using less energy. What that means is that you will have a slight increase in the price in the form of a small investment up front, like insulating your windows or buying a more efficient car, but you will end up saving a lot more money over the life of the equipment in terms of decreased energy costs.
The second pillar is making electricity, the power sector, carbon-free by replacing dirty power generation with clean power sources. That’s clearly going to cost a little money, but those costs are coming down so quickly. In fact there are already a lot of clean technologies that are at cost parity with fossil fuels— for example, onshore wind is already as competitive as gas—and those costs are only coming down in the future. We can also expect that there are going to be newer technologies. But in any event, the fact that we’re going to use less power because of the first pillar should actually make it a wash in terms of cost.
The Australian deep decarbonization teams have estimated that even with the increased costs of cleaner cars, and more efficient equipment for the home, etc., when the power system transitions to where it’s zero carbon, you still have savings on your energy bills compared to the previous situation.
The third pillar that we think about are clean fuels, essentially zero-carbon fuels. So we either need to electrify everything— like cars and heating, once the power sector is free of carbon—or have low-carbon fuels to power things that cannot be electrified, such as airplanes or big trucks. But once you have efficiency, these types of equipment are also more efficient, and you should be spending less money on energy.
Saving money depends on the three pillars together, thinking about all this as a whole system.
- Given that renewable sources provide only a small percentage of our energy and that nuclear power is so expensive, what can we realistically do to get off fossil fuels as soon as possible?
There are a lot of studies that have been done for the U.S. and for Europe that show that it’s very realistic to think of a power sector that is almost entirely powered by renewables by 2050 or so. It’s actually feasible—and this considers all the issues with intermittency, dealing with the networks, and whatever else represents a technological barrier—that’s all included in these studies. There’s also the assumption that energy storage, like batteries, will be cheaper in the future.
That is the future, but 2050 is not that far away. 35 years for an energy transition is not a long time. It’s important that this transition start now with the right policy incentives in place. We need to make sure that cars are more efficient, that buildings are more efficient, that cities are built with more public transit so less fossil fuels are needed to transport people from one place to another.
I don’t want people to think that because we’re looking at 2050, that means that we can wait—in order to be almost carbon free by 2050, or close to that target, we need to act fast and start now.
- Will the remedies to climate change be worse than the disease? Will it drive more people into poverty with higher costs?
I actually think the opposite is true. If we just let climate go the way we are doing today by continuing business as usual, that will drive many people into poverty. There’s a clear relationship between climate change and changing weather patterns, so more significant and frequent extreme weather events, including droughts, will affect the livelihoods of a large portion of the world population. Once you have droughts or significant weather events like extreme precipitation, you tend to see displacements of people, which create conflict, and conflict creates disease.
I think Syria is a good example of the world that we might be going towards if we don’t do anything about climate change. Syria is experiencing a once-in-a-century drought, and there’s a significant amount of desertification going on in those areas, so you’re looking at more and more arid areas. That affects agriculture, so people have moved from the countryside to the cities and that has created a lot of pressure on the cities. The conflict in Syria is very much related to the drought, and the drought can be ascribed to climate change.
And consider the ramifications of the Syrian crisis: the refugee crisis in Europe, terrorism, security concerns and 7 million-plus people displaced. I think that that’s the world that we’re going towards. And in a world like that, when you have to worry about people being safe and alive, you certainly cannot guarantee wealth and better well-being, or education and health.
- So finally, doing what needs to be done to combat climate change all comes down to political will?
The majority of the American public now believe that climate change is real, that it’s human induced and that we should do something about it.
But there’s seems to be a disconnect between what these numbers seem to indicate and what the political discourse is like… I can’t understand it, yet it seems to be the situation.
I’m a little concerned because other more immediate concerns like terrorism and safety always come first. Because the effects of climate change are going to be felt a little further away, people think that we can always put it off. The Department of Defense, its top-level people, have made the connection between climate change and conflict over the next few decades. That’s why I would argue that Syria is actually a really good example to remind us that if we are experiencing security issues today, it’s also because of environmental problems. We cannot ignore them.
The reality is that we need to do something about climate change fast—we don’t have time to fight this over the next 20 years. We have to agree on this soon and move forward and not waste another 10 years debating.
Read the Deep Decarbonization Pathways Project 2015 report. The full report will be released December 2.
Laura Segafredo was a senior economist at the ClimateWorks Foundation, where she focused on best practice energy policies and their impact on emission trajectories. She was a lead author of the 2012 UNEP Emissions Gap Report and of the Green Growth in Practice Assessment Report. Before joining ClimateWorks, Segafredo was a research economist at Electricité de France in Paris.
She obtained her Ph.D. in energy studies and her BA in economics from the University of Padova (Italy), and her MSc in economics from the University of Toulouse (France).
The Science, Revisited
Tony Barnston, a scientist at the International Research Institute for Climate and Society, took a few hours out of his day and answered questions on a Reddit “Ask Me Anything” session.
Here are three questions from his session, but you can visit the full Reddit appearance here. Two more Reddit “Ask Me anything” sessions will be will be announced in the coming weeks, so stay tuned.
Which short-term effect of climate change do you feel we should be most worried about?
Sea level rise. As the polar ice melts, it adds water to the oceans. Also, a warmer ocean expands upward. We humans continue to build on very low-lying land, which is a mistake. We are short-sighted and give too much weight to short-term profitability.
But sea-level rise is not extremely short-term; it is very slow. But individual sea level events (related to storms or spring tide conditions) will gradually take bigger bites out of our developments in places like Miami, the Pacific islands, etc.
If global warming continues at its non-linear pace, what will be the effect of melting Greenland glaciers on the Gulf Stream over the next 10 years? How will that affect climate in Europe and beyond?
This is complex. The Gulf Stream would continue, but would encounter cooler ice-melt water near Greenland. The effect on the Gulf Stream’s trajectory toward Europe is not easy to answer, and would require a comprehensive research project. But part of the Gulf Stream would probably still make it to Europe unimpeded.
Even though climate change will play out over a long time frame, the intensely negative implications of human impact and ramifications of a shifting climate will be extreme. How do you maintain a positive outlook when all predictions point down the drain?
Although many predictions do point down the drain, not all of them do. There is a large amount of uncertainty in these long-term climate projections. So, my outlook is uncertain. It is not in any definite direction yet. While there is no doubt in my mind that climate change is occurring, and that it is affecting human welfare, there is much uncertainty about the rate of climate change.
The Science, Revisited
Although scientists have known for some time the role that ice had in shaping the landscape, still many questions have been left unanswered. In the last few decades, new techniques have allowed scientists to date the original remnants in the landscape. With this new data, scientists can track back what glaciers did in the past, and how it is related to climate change. This provides a link to predict what could be happening in the next 100, 200, 500 years.
In the above video produced by the American Museum of Natural History, a professional film crew follows the scientists from New Zealand to the Lamont-Doherty Earth Observatory’s geochemistry lab in Palisades, N.Y., to show how the process works.
In the coming weeks leading up to 2015 Paris Climate Summit we will be looking back at some key State of the Planet stories about climate science. Visit the full article here and stay tuned for more posts about climate science.
The Science, Revisited
Climate scientists continue to look to the role that greenhouse gases, specifically C02 play in the climate system. CO2 molecules in the atmosphere absorb heat (infrared radiation) coming from the Earth’s surface and then re-radiate some of that heat back to the surface to generate a warming effect.
In this past State of the Planet article, Kelsey Dyez, a geochemist at the Lamont-Doherty Earth Observatory, describes how the carbon dioxide (CO2) content of the atmosphere influences climate. Kelsey describes this process while also explaining the significance past climate research has in understanding our world today.
In the coming weeks leading up to 2015 Paris Climate Summit we will be looking back at some key State of the Planet stories about climate science. We hope to help readers better understand the science and its consequences. Stay tuned for more.
We gained two more members to our team this week; Conor Sullivan, a field technician with the Ducklow group at the Lamont-Doherty Earth Observatory, and Ribanna Dietrich, a graduate student at the University of Edinburgh in Scotland. After dropping them off (along with a massive quantity of cargo) the Gould made a fast departure to start a four-week research cruise to study fjord processes along the West Antarctic Peninsula. Fjords are a major feature of the coastline, but haven’t received a lot of study due to the difficulty of safe access and the limited available resources. When the Gould comes back around it will be time for Jamie Collins and I to return to Punta Arenas.
Now that we have a full team it’s time to ramp up our sampling schedule. We’ve been pretty busy so far; in addition to our ice removal experiment we’ve already made it out to the regular Palmer LTER sampling sites by zodiac a couple of times. This three minute video, taken on the nicest day anyone on the team can remember having in Antarctica, highlights some of the challenges of conducting a full oceanographic sampling program from a 19 foot zodiac.
Unfortunately most days this season have looked nothing like the day in the video. As Jamie discusses in his blog here, the winds have been unusually strong this year. That’s kept the phytoplankton bloom from developing and mostly kept us on shore (boating operations shut down when the wind reaches 20 knots).
Contrary to all expectations however, the strong winds this season haven’t broken up the land fast ice in Arthur Harbor. Over a week ago I reported on our “last” visit to our ice station. With the ice in good shape we were able to make another sampling foray yesterday. I’m glad that we did, because a diatom bloom is starting to develop under the ice! The exciting thing about that is that it’s exactly what we would expect to find. The sea ice stabilizes the water column and keeps the diatoms from getting mixed too deep. For many years researchers, relying primarily on satellite observations of chlorophyll a in the surface ocean, have hypothesized that the presence of sea ice plays an important role in high latitude phytoplankton bloom formation. Direct observations of this however, are sparse. This year, purely by chance, we’ve got the opportunity to observe a well-stabilized water column underneath sea ice adjacent to a highly mixed water column in open water.
Leading up to the UN Conference on Climate Change this month in Paris, the Earth Institute is posting daily photos and videos from experts working in the field of climate science. Also, look for Magnum photo service pictures on the site every Monday. Follow @earthinstitute on Instagram for daily updates.
The project is several weeks in and with each new line of data we celebrate the collection and then dig into it to see what we can learn. The map is growing, filling in with the 20 km flights designed to provide a framework for the 10 km flights that would fill in the gaps during our next field season. However, already in some instances the team has tightened their grid lines to 10 kms, taking advantage of opportunities in the weather or the inability to collect a line over another part of the shelf.
(Above is a video of the retraction of the IcePod arm as the plane flies over the Ross Sea Polynya (open water set in the middle of the sea ice). During data collection the pod is lowered and then retracted upon completion. Video by Dave Porter.)
The latest team celebration is around the magnetometer data. Magnetics is used to understand the make up of Earth’s crust. The end goal is to calculate the anomaly or unique magnetic signal from the geology in an area after separating out all the other magnetic ‘interference’ to better understand the formation of this area of Antarctica. The Earth’s magnetic signature varies by location so a base station is set up in order to collect a background magnetic level for the area. During data collection the base station will be used to determine anticipated magnetic levels for the region.
In data processing the local signal is corrected for and small spikes from the aircraft that the instrument is mounted to will be removed. This means that each magnetic survey includes a magnetic compensation flight at high elevation so that the magnetic signature of the plane can be identified. A model is then developed to separate the signal of the plane from that of the geology. The magnetic compensation flight includes flying in all four cardinal directions – check the annotated flight track image above to see a recording of these flight lines.
The compensation flight also includes 3 repeat pitch-roll-yaw moves. Pitch includes tipping the wings side to side, roll is moving the nose and tail down and then up and yaw is a rotating or twisting of the plane left and then right. Thanks to New York Air National Guard loadmaster Nick O’Neil we have a video of the pitch and roll pieces of this compensation flight. Note the video is sped up to show 2 minutes of filming in 17 seconds so hold onto your seats! Be sure to note how the vapor contrail of the plane tracks the serpentine movement of the flight pattern during the rolls!
For the magnetics the flight line selected was one that has been flown previously by the NASA IceBridge program. Duplicating flights between different projects provides an opportunity to test and validate equipment. From the onset collecting magnetics data from the LC130 with the IcePod system was considered challenging. The compact nature of the instruments and all the metal surrounding them made this a real test, however, the resulting first unprocessed flight line (below) shows that the shape of the two lines agree! The alignment will only improve with processing against the base station. This is a significant achievement given the very compact environment of the instruments in IcePod – cause for celebration!
The magnetic image shows the signature of this area of Antarctic geology in clear detail. Flying away from McMurdo the Transantarctic Mountains are on the left side of the dataset. The flight moves towards the highly magnetized volcanic environment of Marie Byrd Land in West Antarctica on the far right. Note the elevated magnetics on the right form the volcanic rock. A magnetic high is also visible in the center, yet on the left side the Transantarctic Mountains show no sign of high magnetism. This is not surprising as this mountain range that stretches mainly north to south across Antarctica, was formed from uplift beginning about 65 million years ago, and is composed of sedimentary layers of rock overlying granites and gneisses.
Magnetics has evolved quite a bit over the years of geophysical sampling. Lamont scientist Robin Bell recalls when in the 1990s when she worked on a project mapping a active subglacial volcanism in West Antarctica that the magnetometer was towed on a winch ~100 meters behind the aircraft. If the wiring got caught up in the tail section it was cut lose and the instrument was lost. More recent work has located the instrument in the tail of the plane (as in the P3 bombers of World War II) and on the tips of the wings of the plane as was the case during the 2008 AGAP work in East Antarctica mapping the subglacial Gamburtsev Mountains. The IcePod model of placing the magnetics so close to the radar has not been done before.
Check out the newest lines on the GIS map and stop back for more.
For more about this NSF- and Moore Foundation-funded project, check our project website: ROSSETTA.
Margie Turrin is blogging for the IcePod team while they are in the field.
There are actually a few reasons to be just a little bit optimistic about the possibility of a good outcome from COP21, apart from the fact that it is being held in one of the world’s loveliest cities.
Perhaps most important is that the pope is paying attention, and a lot of people pay attention to what the pope pays attention to. That includes people like me who are not Catholic and don’t really believe the pope has speed-dial access to the word of God. I am sure he has better access than I do. I can’t seem to get hold of The Lord at all these days. So it is worth listening to the pope and, incredible as it might sound, the pope is actually saying the right things on this issue and, of course, we have no obligation to listen to him on anything else.
The second isn’t so much about COP21, but I have not lost faith that climate may be less sensitive to our actions than most scientists think it is. There might be a huge negative feedback hidden somewhere that will counteract all the efforts we are making to try to change climate for the worst. The climate system may turn out to be sort of dull and unresponsive. I wouldn’t bet on it, but I need to hold onto some hopes.
And no matter what changes happen, they will happen fairly slowly, much more slowly than the outbreak of war, plague or pestilence. Society is pretty slow, dull and unresponsive, too, so that doesn’t help, but things will change slowly, and that gives us time. The time should be available for us to create the huge negative feedback ourselves to counteract what we have done, just in case Nature doesn’t have one hidden. COP21 should be able to buy us the time we need to engineer the feedback.
But more than that, I don’t believe for a second that we are on the brink of global destruction. We are on the brink of a global re-distribution and whole scale re-balancing of global goods and bads. But we have been there before and survived. Our planet will be a very different place, no doubt, but it will still be here and so will we, in some form, maybe not recognizable to us now. I don’t know how we will survive, but I am optimistic that we will.
I do know we will not be rescued by constantly repeating words like vulnerability, sustainability and resilience to one another, and I am optimistic that that phase will pass and we can start to think seriously about our new world. COP21 might just help us start that thinking.
Mutter was among Earth Institute contributors writing about the Copenhagen climate summit in 2009. Here’s some of what he had to say in a question and answer session back then (you can see all of his comments in 2009 here):
Is the world ready to meet a CO2 target—any target?
Probably not; we need to make big investments in technology. The lifestyle changes that we have made to feel better about ourselves don’t amount to much. I’m not sure driving silent, ugly cars is going to help in the way people think they will. …
What would you most like to see happen at Copenhagen?
A serious discussion about adaptation: What we are going to do for [low-lying islands like] the Maldives and climate change refugees? Normally, refugees are people who have been displaced by somebody else—persecuted. One of the obligations we have to refugees is to repatriate them to where they came from. But if where they came from is under water? We don’t have language to describe the international community’s obligation for people persecuted by climate.
What will it take to get people to act?
If people see countries going under water, the spread of conflict in the drylands of Africa, with implications beyond, and people displaced from their homes, we will do something. We’re altruistic as a species. It calls on our core beliefs. We can ignore polar bears and still go to heaven, but we can’t ignore people.
Antarctica holds about 27 million cubic kilometers of ice that is constantly flowing, pushed by its own weight and pulled by gravity. If just part of that ice – the West Antarctic Ice Sheet – were to melt into the ocean, it would raise global sea level by 6 meters. That’s more than a theoretical problem. West Antarctica is losing ice mass, and scientists are worried.
Warming air temperatures and warming water both play a role. So does geography.
“As our planet warms, the polar regions are warming faster than anywhere else on our planet and the ice sheets are changing. They’re melting and they’re sliding faster toward the ocean. Global sea level is going up, and we expect that to go up faster as more of the ice melts,” said Robin Bell, a glacialogist at Columbia University’s Lamont-Doherty Earth Observatory who is leading the Changing Ice, Changing Coastlines Initiative with paleoclimatologist Maureen Raymo.
To understand how a massive ice sheet can become destabilized, we need to understand the structure of the land that holds the ice on Antarctica today.
Bell and her colleagues engineered a way to do that in some of the most remote regions on the planet. They took radar and other technology normally used to study the sea floor and attached it to a C-130 cargo plane in a capsule called the IcePod. By flying over the ice sheets – as they’re doing right now over Antarctica’s giant Ross Ice Shelf – they can see where the ice enters the ocean and map the ice layers and the terrain hidden beneath it.
Ice shelves, like Ross, are particularly important to the West Antarctic Ice Sheet’s stability. They jut out over the water ahead of flowing glaciers and slow the glaciers’ flow into the ocean. The biggest threat to ice shelves is warmer water brought in by ocean currents that flows low along the continental shelf and eat away at the base of the ice shelf. This line where ice, water and rock meet is called the grounding line. As the ice erodes, the grounding line moves inland, and geography comes into play: In West Antarctica, most ice shelves are on slopes that slant inward toward the center of the continent. As the grounding line moves inland and into deeper water, the ice shelf becomes unstable and can break apart.
After the Larson B Ice Shelf broke off from Antarctica and disappeared over the span of a few weeks in 2002, the glaciers it held back started flowing at eight times their previous speed. It was a wake-up call, as Bell explains in the video above.
The Ross Ice Shelf is much larger than Larson B and is an outlet for several major glaciers from the West Antarctic Ice Sheet. And it’s only one area of West Antarctica that has scientists concerned.
To the west of the Ross Ice Shelf, on the Amundsen Sea, scientists see evidence that the massive Thwaites and Pine Island Glaciers are also moving faster as their grounding lines recede. At the Pine Island Glacier, the grounding line receded about 31 kilometers between 1992 and 2011, contributing to the glacier’s increasing speed and ice loss starting around 2002. One recent study used computer modeling to look at what might happen and suggests that if the Amundsen Sea glaciers were destabilized, a large part of the West Antarctic Ice Sheet would discharge into the ocean. Another study found that the rate of thinning in West Antarctic ice shelves had increased 70 percent over the past decade based on satellite data, and some ice shelves lost as much as 18 percent of their volume between 1994 and 2012. (To learn more about changing ice sheets, look for the Polar Explorer app being released by Lamont-Doherty Earth Observatory this fall.)
These and other findings led the National Academies of Sciences to issue a recommendation this summer that the U.S. Antarctic Program at the National Science Foundation make changing ice sheets and their contribution to sea level rise one of its top research goals for the next 10 years, particularly in West Antarctica. The fate of the ice sheets has a direct impact on humanity: as land-based ice melts, it raises sea level, and that can threaten coastal communities and economies worldwide.
“Our planet’s large ice sheets contain secrets that will be uncovered by studies of the changing ice and changing coastlines,” Bell said. “New expeditions to poles to decode how they work what makes them flow deform and melt while new studies of ancient shoreline will inform how fast the change occurred in the past. We envision a new phase of exploration and discovery to inform our future.”
Learn more about West Antarctica and the impact of rising temperatures on marine life, part of a video series.
As the Paris climate summit approaches, a new study shows in detail that it is technologically and economically feasible for the United States to sharply reduce greenhouse gas emissions in line with the international goal of limiting global warming to 2 degrees Celsius or less. The report says it is possible to revamp the energy system in a way that reduces per capita carbon dioxide emissions from 17 tons per person currently to 1.7 tons in 2050, while still providing all the services people expect, from driving to air conditioning.
The two-volume report is from the Deep Decarbonization Pathways Project. The project is led by the Sustainable Development Solutions Network, a United Nations-sponsored initiative whose secretariat is at Columbia University’s Earth Institute, and the Institute for Sustainable Development and International Relations. The analysis itself was conducted by the San Francisco-based consulting firm Energy and Environmental Economics Inc., in collaboration with researchers at Lawrence Berkeley National Laboratory and Pacific Northwest National Laboratory.
The first volume describes the technology requirements and costs of different options for reducing emissions. An update of a study released last year, it lays out in detail the changes in the U.S. energy system needed year by year to meet the target, looking at every piece of energy infrastructure—from power plants and pipelines to cars and water heaters—in every sector and every region of the U.S.
The report says this can be done using only existing technology, assuming continued incremental improvements but no fundamental breakthroughs, and without premature retirement of current infrastructure, at a net cost equivalent to about 1 percent of Gross Domestic Product in 2050.
The report finds multiple technology pathways capable of reaching the target, presenting choices that can be made based on innovation, competition and public preference. Passenger cars, for example, could be switched to battery-powered electric vehicles or fuel-cell vehicles. Low-carbon electricity could be provided by renewable energy, nuclear power, or carbon capture and storage. The authors looked closely at the reliability of a power grid with high levels of intermittent wind and solar energy, using a sophisticated model of the electric system’s operation in every hour in every region.
“I think our work throws down a gauntlet to those who claim that decarbonization of the U.S. energy system is impractical and out of reach,” said report lead author Jim Williams, chief scientist at Energy and Environmental Economics and director of the Deep Decarbonization Pathways Project. “Arguments that the U.S. can’t achieve this technologically or economically don’t hold water.”
Williams said, “The challenges are often not what people think. The public has been conditioned to think of climate policy in terms of costs, burdens, loss of services. But if we get it right, we will create a high-tech energy system that is much more in sync with a 21st century economy, and there will be many more economic winners than losers.”
The second volume provides a roadmap for what policy makers at the national, state and local levels need to do to enable a low carbon transition. It describes how businesses and whole regions could benefit in an energy economy where the dominant mode shifts from purchasing fossil fuel, with historically volatile prices, to investment in efficient, low carbon hardware, with predictable costs.
The U.S. study is part of a series by the Deep Decarbonization Pathways Project, an international collaboration of research teams from the world’s 16 highest-emitting countries. This year it has issued country-specific strategies for deep decarbonization also in Australia, Brazil, Canada, China, France, Germany, India, Indonesia, Italy, Japan, Mexico, Russia, South Africa, South Korea and the United Kingdom.
“The DDPP has taken an essential step in low-carbon energy policy, and the work of the U.S. team points the way forward for the Paris summit,” said Earth Institute Director Jeffrey Sachs. “Happily, the U.S. government has also endorsed the idea of preparing deep decarbonization pathways as a critical tool for achieving the transformation to low-carbon energy systems worldwide.”
In September, a joint statement on climate change cooperation by President Obama and President Xi Jinping of China stressed “the importance of formulating and making available mid-century strategies for the transition to low-carbon economies.”
In the run-up to Copenhagen, there was widespread hope that the conference would lead to a legally binding agreement that would include commitments that would keep global temperatures within tolerable levels. None of that happened. Copenhagen did lead to widespread agreement that an increase in global average temperatures of more than 2 degrees Celsius would be intolerable (though the small island states wanted a 1.5 degree goal, which they need to survive). The developed countries also agreed to come up with $100 billion annually, starting in 2020, to assist in mitigation and adaptation measures in the developing countries.
As we head to Paris, the expectations are profoundly lower. The national commitments that countries are putting on the table (“Intended Nationally Determined Contributions”) do not add up to nearly enough to keep us within 2 degrees; instead the plan is to come back every five years and hopefully do better. Nor will they be legally binding; fulfillment of them will be monitored and reported, but there will be no sanctions for missing them, and no one can sue to enforce them. (To be fair, even though the Kyoto reduction requirements were legally binding in theory, there were no meaningful sanctions available for missing them, either.)
It is still mathematically possible to stay within 2 degrees, but the odds of actually doing so seem to be receding by the month.
The $100 billion plan is still on the books, but the pledges made so far are well short of what is needed even for the first year. And there is growing evidence that, even if that amount of money were found every year, it would not be nearly enough to meet the needs—especially if temperatures are on a pathway well above 2 degrees.
One encouraging development is that it was unclear before and during Copenhagen whether China would commit to reducing its greenhouse gas emissions. China’s emissions are continuing to grow at a rapid pace and dominate the world picture, but the central government of the country has made serious promises to cap emissions (though not until 2030), and is participating much more fully in the international climate regime than it did in 2009.
On the other hand, in 2009 there were still real prospects for U.S. climate legislation; the White House and both the Senate and the House were controlled by Democrats who favored such legislation. Today, however, both the Senate and the House are controlled by Republicans who reject the basic science of climate change and are doing everything they can to stand in the way of President Obama’s use of existing statutory authority to fight climate change.
Thus the results of the U.S. national election in November 2016 will be even more important for the future of the global climate than the outcome of the Paris conference.
This post is one in a series reflecting on what has changed since the climate talks of 2009 in Copenhagen. Gerrard was among those writing for State of the Planet about those talks back in 2009, contributing several reports, which you can find in this compilation of stories about the Copenhagen talks. Here is an excerpt:
Many people, including myself, are now looking through the documents and trying to figure out just what they mean. But it is clear that the conference achieved neither a universally accepted binding legal agreement that would have assured a dramatic reduction in greenhouse gas emissions (and perhaps have denoted a return of the Age of Miracles), nor a complete breakdown. …
Major fights lie ahead about whether the measures agreed to will succeed in meeting the developed countries’ goal of keeping future increases in global temperature to 2 degrees Celsius; whether achieving even that goal will be sufficient to prevent catastrophic damage in some of the most vulnerable countries; and many other issues. It is also highly uncertain whether the conference’s results will make the U.S. Senate more or less likely to approve U.S. legislation.
Today’s a special day in the annals of Antarctic exploration, it’s been 100 years to the day since Ernest Shackleton’s ship Endurance was crushed by ice and finally sank after 307 days beset in the pack ice of the Weddell Sea. The disaster ended Shackleton’s hopes of leading the first team to cross the Antarctic continent, but set the stage for one of the most audacious maritime adventures of the era. You can read more about that in Frank Worsley’s excellent book Endurance, or in Shackleton’s own book South. Or you can take the easy way out and read the Wikipedia article here. To mark the occasion the Royal Geographical Society has released a new set of digitized images from the expedition. The images were digitized by scanning the photographic plates directly, the resulting resolution is extraordinary.
There are, not surprisingly, a lot of Antarctic history nerds in Antarctica, so we had a small celebration in honor of the Endurance today. It’s also a good day to reflect on modern Antarctic science and travel. Things have evolved a bit since 1915; the only open small boat journeys that we get to take are to our designated sample sites, and we don’t get to take them in anything approaching exciting conditions. We also have these actual research stations to operate from; for US researchers those are Palmer Station (where I’m writing from), McMurdo Station (less a research station than a logistics hub), and the Amundsen-Scott South Pole Station (which I have not been to). You might be asking exactly who operates these stations and how. Where, for example, does the trash go? What about sewage? There are some key differences between the stations but they all follow the same operational logic (that’s a nice way of saying the operation isn’t always logical). By request here’s a quick look at the inner workings of Palmer Station.
First, the basics. Palmer Station was built by the Navy Seabees over a three year period starting in 1965. It was purpose-built for science and, unlike McMurdo Station, was never a military station*. Today the station is operated by something called the Antarctic Support Contract (ASC) on behalf of the National Science Foundation. The ASC is an interesting construct and the relationship between scientists (the end-users of the stations), ASC itself, the individual ASC personnel on-site, and the National Science Foundation resembles a particularly intricate four-party dance that no one has mastered. A lot of toes get stepped on but, in the end, a lot of science gets done. The ASC operates as a subsidiary of a much larger logistical company and is subject to periodic rebidding. Currently the ASC is held by Lockheed Martin, before that it was held by Raytheon. The parent company changes but the internal structure and personnel of the ASC stay more or less the same.
The maximum capacity of Palmer Station is around 46 people, though a typical summertime population is probably closer to 40. Most of these are ASC personnel. At this exact moment there are 34 people at station, 24 of whom work for ASC. Debating the merits of more or fewer ASC personnel supporting fewer or more scientists would take a much longer blog. Suffice to say that toe’s a little bruised. One issue is that the station is old and it takes quite a few people to keep it running (and the personnel here do a great job of that). Another issue is that the station is set up for science groups to come in and out with a minimal time commitment. That’s convenient for scientists, but discourages coordination among science groups or long-term investment in the system by any one group (the Palmer LTER study is a major exception to this). Because of this two ASC personnel have full time jobs just supporting us in basic tasks; allocating space, procuring chemicals, supplies, fixing equipment, etc.
McMurdo Station has the feel of a South Dakota boom town (although I think all of those are de-booming at the moment) with a peak population around 1,200. As a result of the potential environmental impact of 1,200 people in a somewhat-pristine coastal environment there has been some investment in environmental protection at McMurdo. Sewage, for example, is treated in a top-of-the-line sewage treatment facility that is no different from what you’d find in any small municipality. Unfortunately no such investment has been made at Palmer Station. Our sewage and food waste gets a quick grind in a macerator before being released into Arthur Harbor. While this probably doesn’t have any catastrophic impact on the local ecosystem it certainly does have some impact. You can quickly identify the location of the sewage outfall from the gulls and penguins that congregate there (there was an elephant seal in there yesterday, Jacuzzi-like I suppose?). And while it is certainly a bigger problem at McMurdo, the input of artificial hormones and other pharmacological products into the local seawater is a bit disconcerting. This would be a perfect place to test new sewage treatment technology, I’m not sure why that isn’t done (oh right, $$).
Most of the other waste streams at Palmer are treated with a little more care. Food waste that can’t get macerated (e.g. chicken bones) get burned in a barrel (okay, not much care there), virtually everything else gets transported out by ship. Regular trash gets compressed, bundled, and disposed of in Chile. Laboratory waste, which may contain trace amounts of nasty things, gets transported to Chile, then by cargo vessel to the United States. Actual hazardous lab waste, broken down by type, goes out the same way every two years.
Fortunately, since we end up feeding a lot of it to the wildlife in Arthur Harbor, the quality of food at Palmer Station is very high. There are two chefs on staff and they take it seriously. They succeed in doing this without making it seem excessive; I recall being a bit offended that steak, lobster, and other luxury items are flown – at great expense – into McMurdo Station (yet getting scientific equipment flown in or samples out takes nearly an act of Congress). There’s no air traffic here, everything comes in by ship, and the cuisine leans more toward the good home cooking variety. I enjoy it with minimal guilt.
Station power comes from a surprisingly small diesel generator. This and the backup generator keep the diesel mechanic, who also doubles as a heavy equipment operator, pretty busy. McMurdo Station has experimented with diversifying its power sources with varying degrees of success. It has a small (and I understand underutilized) wind farm, and early on it had a small nuclear power plant. I’m not aware of any similar experiments at McMurdo, and really, I’m not sure what else you could do. It’s very cloudy here and it snows a lot, so solar would be a bad choice. The station is far too small to justify nuclear, and that’s pretty unpopular these days anyway. Plenty windy here, but there are a ton of birds, and I hear that wind turbines and birds are a bad mix. So I think we’re stuck with diesel.
There’s one additional quirk that I think is unique to Palmer Station. Everyone, from the station manager to the station doctor to the scientists, pitches in with housework. Once a week you take your turn cleaning up after dinner, and every Saturday afternoon you draw an additional cleaning task out of a hat. It can be a bit annoying when you have to stop doing science to clean, but it’s worth it for the extra sense of community.
*McMurdo Station was originally Naval Air Facility McMurdo, although the purpose of McMurdo Station has always been (mostly) scientific.
This week the Earth Institute’s International Research Institute on Climate and Society convened a 2-day workshop reflecting on efforts over the past 20 years to improve responses to climate variability, especially risks associated with El Niño. Concerns that the current El Niño has the potential to exceed in severity the devastating El Niño of 1997-1998 permeated the discussion. At the conference I presented a brief overview of the social, economic and political changes that will have a large effect on human impacts from El Niño. I amplify those remarks here. For more information, thoughts and opportunities to engage on questions of how climate, fragility and risk interact, check the Environment, Peace and Security Certificate Program website.
Much of the discussion about the fear that the current El Niño will turn out to be even worse than the devastating 1997-1998 El Niño neglects a crucial fact. Today’s El Niño is unfolding over a world that is in many ways more vulnerable than the world of 1997-1998. Just as today’s climate continues to generate extremes without historical precedent, we are starting to see elements of social vulnerability also without historical precedent.
That is an alarming combination.
It is relevant because historical experience tells us that El Niño roughly doubles the risk of major political insecurity breakdowns in countries affected by its weather impacts. So if the year brings together unprecedented weather extremes and unprecedented patterns of fragility, the risks may be worse than our preparations.
Think of a typical pair of office scissors. Their two blades are not especially sharp, yet they can cut very well because of how they interact. In the same way social impacts that arise from extreme weather depend on what kind of underlying vulnerability such weather encounters. We have heard a lot about the meteorological blade of the scissors.
Let us now consider the societal blade.
Global food prices in 1998 were at their long-term average. They have been markedly higher since the shocks of 2008, and even after a period of abating pressure last year remain 25 percent above their long-term average in real terms. As a result, poor communities and vulnerable regions have an elevated baseline risk of food insecurity. Compounding this effect is the unusually high global levels of income inequality, which Thomas Piketty and others have drawn attention to—the poorest of the poor are worse off in many parts of the world.
Changes to the global food system have diminished our ability to respond to food crises since 1998. Global food stocks have shrunk from about 100 days’ worth of consumption to about 60 today. And changes in where those stocks are held make it far more difficult to direct them to humanitarian crises. Finally, government budget deficits in donor countries are far higher than before, making it harder to mobilize large crisis responses.
Politically, the world is showing signs of heightened fragility. Some elements of this fragility were already underway in 1998, and what is alarming is that they have not yet abated. One measure of such fragility is the number of countries experiencing a transitional political state characterized by neither strong democratic institutions nor strong autocratic institutions. Known as anocracies, such countries are not well equipped to absorb exogenous shocks and are highly vulnerable to various forms of instability. Since the late 1990s, they have been at historically unusual highs.
Other elements of political fragility are worse than in 1998. The amount of territory outside of state control has increased to an unexpected and scary degree since 1998, including a number of countries that qualify as failed states (such as Libya) and countries no long exercising sovereignty over major areas (such as Syria). Such areas pose multiple risks. They provide havens for trafficking, terrorism and other illicit behavior. They trigger population displacement. They augment risk of epidemics. And the people within them suffer high levels of vulnerability to food insecurity and other impacts from climatic stress.
The trend in heightened political fragility is now clear enough to be counted as a defining risk of our age. It is also one of the saddest surprises of the past decade, following over 25 years of broad progress toward enhanced security and stability, as documented by scholars such as Steven Pinker. In the last 10 years, security breakdowns have increased in number and intensity, and the resulting human tragedies and geopolitical upheavals have secured a permanent foothold in our daily headlines.
When the post-WWII record for global refugees and internally displaced populations was broken last year, topping 50 million for the first time, it came amid so much bad news that it scarcely got the attention it deserved.
These changes take place against a backdrop of rapid population change in the poorest countries of the world, which has the effect of increasing the number of people exposed to the risks of El Niño. There are 1.3 billion more people in the world now than in 1998. Calculations with spatial data carried out by Tom Parris and colleagues at ISciences show that an additional 230 million people now reside within the areas most affected by the 1997-1998 El Niño.
That’s like adding an additional Indonesia (203 million people in 1998) and Malaysia (23 million in 1998) to the El Niño front lines.
Moreover, in areas where rapid urbanization is not being met with equally fast increases in jobs and political participation, the potential for protests and instability is also rising. Here, too, the trends are not in our favor. In 1998 poor cities were growing at about 3 million people per year. Today the number is 7.5 million.
If you thought things couldn’t get worse, recall that whatever weather shocks emerge from El Niño today will do so in the context of long-term climate change that is manifesting at a more rapid pace than we earlier anticipated. September 2015 was about half a degree Centigrade higher than September 1997, for example. For the year as a whole, 2015 is shaping up to be the hottest ever on record—if trends continue it will be about a quarter of a degree hotter than 1998 and a third of a degree hotter than 1997.
Fractions of degrees may not seem like much at first glance, but when the global climate system entered lesser degrees of this non-analog state earlier in the decade we witnessed such unprecedented disruptive shocks as the heat waves that triggered the global food crisis associated with the Arab Spring, unusual devastating floods in Pakistan, widespread and traumatic wildfires in the western and southwestern U.S., and unusual large storms such as those affecting Myanmar, Philippines and the United States.
So the fact that the 2015-2016 El Niño will do its damage against an even higher level of baseline climate risk ought to give us serious pause.
Some societal risks we know with some confidence, stemming from analysis of the historical data. Food security problems, population displacement, disease outbreaks and political unrest are among such risks. Others are less well understood. Being less well understood does not make them less significant.
The risks that are relevant when considering how El Niño might interact with the underlying social and political changes underway are less predictable than El Niño itself. Cataclysmic breakdowns in human security are thankfully rare events, shaped by a number of causal forces that are marked by high uncertainty.
We cannot say whether El Niño will definitely trigger specific events culminating in large-scale crises in the coming year, in the same way that we wouldn’t be able to know for sure whether a specific drunk driver will cause an accident.
But as with the drunk driver, we know enough to say the risks are high and scary. We ought to be looking harder at whether we are prepared.
To hear my full talk, visit the IRI El Nino 2015 conference website and watch the beginning of the day two recording.