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NASA's Messenger Mission Is Set to Crash Into Mercury - New York Times

Featured News - Mon, 04/27/2015 - 11:00
Features Lamont director Sean Solomon.

Taking a 4,000-Meter-Deep Profile of Antarctic Waters

Melting Glaciers-Tracking Their Path - Mon, 04/27/2015 - 09:47
NB Palmer, West Antarctica, CTD system

The CTD system is lowered over the side from the NB Palmer. It measures temperature, salinity, and oxygen with depth.

In addition to understanding potential pathways for “warmer” circumpolar deep water to reach the ice shelf, we are also measuring what the structure and properties of the water column are and determining if there is already warmer water on or near the continental shelf that could already interact with the glaciers of East Antarctica today.

To measure water properties, we are using an instrument that can be lowered through the water column that measures conductivity, from which we calculate the salinity of the water, temperature, pressure (i.e. water depth), oxygen, and fluorescence, which is an indicator for phytoplankton or algae in the water. This system is called a CTD for short.

This system can also take water samples from different depths that can be used for further analysis or for calibration and verification of the sensors. When we lower this system in deep water, e.g. 4000 meters, (about 2.5 miles), the measurements take over three hours.

We have measured the water properties at 42 different locations during our expedition and will analyze the results carefully when we are back.

Follow @FrankatSea for additional updates and images from the Southern Ocean.

Who’s Cheerleading for Science? - PBS Sci-Tech Now

Featured News - Sun, 04/26/2015 - 11:00
Interview with Lamont scientist Christine McCarthy.

California Drought Drives an 'Explosive,' Longer Wildfire Season - NBCNews.com

Featured News - Sat, 04/25/2015 - 11:00
Those high temperatures are baking the moisture out of the soil and air, leaving vegetation especially dry and vulnerable to catching fire, said Park Williams, an assistant research professor at the Lamont Doherty Earth Observatory of Columbia University.

Nepal earthquake: A tragedy waiting to happen (Opinion) - CNN

Featured News - Fri, 04/24/2015 - 11:00
The disastrous earthquake in Nepal was large, but geophysicists knew it was coming, writes scientist Colin Stark.

$35 Million Federal Award to Rockland's Lamont-Doherty Earth Observatory for Oceanic Research - The Patch

Featured News - Fri, 04/24/2015 - 11:00
Article on IODP being awarded to Lamont-Doherty by the NSF.

War, famine, and drought – the unholy trinity changing our world - Independent

Featured News - Fri, 04/24/2015 - 11:00
All the same, as the co-author of the Syrian study Richard Seager phrased it: "A drought made worse by climate change was one important factor that initiated the social unravelling."

Amid California's Historic Drought, a Scientist Digs for Answers - Inside Climate News

Featured News - Thu, 04/23/2015 - 12:17
Profile of Lamont grad student Guleed Ali.

Lake Mead 2015: Photos Show Water Level Nearing Record Low As Drought Threatens Southwest - International Business Times

Featured News - Thu, 04/23/2015 - 11:00
"Even at the middle-of-the-road scenario, we see enough warming and drying to push us past the worst droughts experienced in the region since the medieval era," Benjamin Cook, a scientist at NASA'sGoddard Institute for Space Studies in New York, told National Geographic in February.

Decoding the Depths of the Earth - Scienceline

Featured News - Thu, 04/23/2015 - 11:00
Feature on seismologist William Menke’s work.

Scientists Turn to Drones For Closer Look at Sea Ice - Climate Central

Featured News - Thu, 04/23/2015 - 11:00
Zappa, an oceanographer at Columbia University’s Lamont-Doherty Earth Observatory, wants to understand the details of exactly how sea ice breaks up and melts, and he is going to call on a quintessentially 21st century technology to help him do it.

Chile Calbuco Eruption 2015: How A Quiet Volcano Could Suddenly Explode After 5 Years - International Business Times

Featured News - Thu, 04/23/2015 - 11:00
"If you have a monitoring system in place, it's very unlikely that deeper activity will go unnoticed," Philipp Ruprecht, a volcanologist at Lamont-Doherty Earth Observatory in New York, told LiveScience.

Mapping the Seafloor

Melting Glaciers-Tracking Their Path - Mon, 04/20/2015 - 10:53
In addition to depth, we can identify many features in the high-resolution multibeam data that we produce. Most of the seafloor near the shelf break (where the water is between 300 and 500 meters deep) is covered with these irregular furrows that are created when large icebergs are grounded here.

In addition to depth, we can identify many features in the high-resolution multibeam data that we produce. Most of the seafloor near the shelf break (where the water is between 300 and 500 meters deep) is covered with these irregular furrows that are created when large icebergs are grounded here.

One of the goals of this expedition is to investigate if water from the Southern Ocean with temperatures above the melting point of glaciers could reach the glaciers in East Antarctica, and if there are any obstacles on the seafloor of the shelf that impact the ability of such water to reach the glaciers and ice streams.

The continental shelf in our study areas along the East Antarctic margin has been mapped in the past, but the existing data are very sparse and have many gaps. However, it is important to know the actual water depth of the continental shelf if we want to understand if water from the Southern Ocean with temperatures above the melting point could reach any glaciers and ice streams in this part of Antarctica.

We use a multibeam echosounder system installed on the Nathaniel Palmer to map the depth of a wide swath of the seafloor along our ship track. Access to the continental shelf is often limited by dense ice cover, but using the multibeam, we have managed to determine detailed depths in several areas. We will later analyze the depth data together with measurements of water column properties that will tell us exactly how deep the “warmer” Southern Ocean water is.

Follow @FrankatSea for additional updates and images from the Southern Ocean.

NASA's MESSENGER Spacecraft Is About To Crash Into Mercury - Huffington Post

Featured News - Fri, 04/17/2015 - 11:01
Quotes Lamont Director Sean Solomon.

NASA’s Messenger spacecraft is about to crash into Mercury - Washington Post

Featured News - Fri, 04/17/2015 - 11:00
"Although Mercury is one of Earth's nearest planetary neighbors, astonishingly little was known when we set out," Principal Investigator Sean Solomon, director of Columbia University's Lamont-Doherty Earth Observatory, said in a statement.

Pacific Ocean Tied To Global Warming Hiatus - Tech Times

Featured News - Thu, 04/16/2015 - 11:00
Quotes Braddock Linsley.

Pacific Current Change Slowed Global Warming - Scientific American

Featured News - Wed, 04/15/2015 - 11:00
The extra ocean heat is coming from the atmosphere, said Braddock Linsley, an oceanographer at Lamont-Doherty Earth Observatory at Columbia University and lead author of the study.

California's History of Drought Repeats - New York Times

Featured News - Mon, 04/13/2015 - 11:00
"What we're seeing is nudging up to being comparable to some of the megadroughts,” said Richard Seager, a climate scientist at Lamont-Doherty"
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