Biology & Paleo Environment Events

For upcoming seminars, see our calendar here.

Current Seminar Organizers: Cassaundra Rose and Samuel Phelps 

Our new seminar day and time: Mondays at 12 pm, Comer Seminar Room

 


Monday September 15 @ 12 pm, Comer Seminar Room: Jessica Moerman, PhD Student at Georgia Tech. Host: Pratigya Polissar

"Improving tropical paleoclimate interpretations by monitoring modern water isotopes"

Abstract:

Oxygen and hydrogen isotopes are key proxies for reconstructing past changes in the hydrologic cycle. The relationship between climate variability and the isotopic composition of rainfall, however, is poorly constrained, especially in the tropics, where many key high-resolution paleoclimate records rely on past rainfall isotopes as proxies for hydroclimate. Multi-year, high-resolution monitoring studies of modern water isotopes are needed in order to inform interpretations of isotope-based paleoclimate reconstructions. In this talk, I will present results from a 5-yr-long timeseries of daily rainfall oxygen isotopes (δ18O) and 6.5-yr-long timeseries of bi-weekly dripwater δ18O from northern Borneo – a key site for reconstructing past hydroclimate variability from stalagmite δ18O. By comparing our isotopic timeseries to instrumental records of local and regional climate variables, we gain insight into the dynamical controls on water isotope variability and constrain the cloud-to-calcite transformation of the climate signal contained within speleothem δ18O reconstructions from northern Borneo.

 


  Future Talks:

  • SPECIAL SEMINAR: Wednesday August 27th @ 11:00 am, Comer Seminar Room, Dr. Fulvio Boatta, University of Palermo. Visiting scientist at LDEO. Host: Joaquim Goes  
  • Monday September 8, 12 pm: Dr. Chris Brierley, UCL. "Pliocene Tropical Dynamics." Host: Peter deMenocal.
  • Monday September 15, 12 pm: Jessica Moerman, PhD Student at Georgia Tech, "Improving tropical paleoclimate interpretations by monitoring modern water isotopes". Host:  Maureen Raymo
  • Monday September 22, 12 pm: Sloan Coats, PhD Candidate LDEO
  • Monday September 29, 12 pm: Dr. Natalie Burls, Postdoctoral Associate, Yale, "A cloud albedo control on ocean temperature gradients and implications for early Pliocene warmth". Host: Heather Ford
  • Monday October 6, 12 pm: Carly Buchwald, WHOI. Host: Kim Popendorf
  • Monday October 13, 12 pm: Dr. Liz Corbett, Postdoctoral Research Fellow, LDEO. Host: Dorothy Peteet
  • Monday October 20, 12 pm: Dr. Tammo Reichgelt, University of Otago, New Zealand, "Seasonal climatic gradients of Early Miocene New Zealand". Host: Billy d'Andrea 
  • Monday October 27, 12 pm: Dr. Paola Moffa Sanchez, Rutgers University. Host: Billy d'Andrea

 
 

Additional talks can be seen on the

google calendar.