Biogeoscience

Members of the new Biogeoscience group investigate living systems as fundamental components of the Earth System and possibly other planetary systems through the integrated study of biology, geochemistry, and geology. In DEES, students have the opportunity to work with faculty in aquatic, wetland and terrestrial ecology, biological oceanography, evolutionary biology, microbial genomics, biogeochemistry, paleobiology and astrobiology. DEES Biogeosciences faculty conduct research on biodiversity and ecosystem function, ecological responses to climate change, biogeochemical cycling and storage of nutrients and carbon, plant physiology and biooptics (both aquatic and terrestrial), and the application of isotopic, fossil and organic geochemical tracers to the study of climate and Earth history. Fieldwork and lab experiments employ diverse analytical, observational and modeling tools to build understanding of the Biosphere and its interactions within the Earth System, in the past, present and future.

Olivia Clifton
Personal Information
Olivia
Clifton
Graduate Student
Earth and Environmental Sciences
Ocean and Climate Physics
Contact Information
206A Oceanography
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8319

Fax: 

(845) 365-8157

Fields of interest: 

interactions among atmospheric chemistry, climate, and the biosphere
Education
Master of Philosophy
Columbia University in the City of New York
02/2017
Master of the Arts
Columbia University in the City of New York
03/2015
Bachelor of Science
University of Wisconsin-Madison
12/2012
Selected Publications:
Interannual variability in ozone removal by a temperate deciduous forest, Clifton, Olivia E.; Fiore, Arlene M.; Munger, J. W.; Malyshev, Sergey; Horowitz, Larry W.; Shevliakova, Elena; Paulot, Fabien; Murray, Lee T.; Griffin, Kevin L. Geophysical Research Letters, Volume: 44 (2017) 10.1002/2016GL070923
Twenty-first century reversal of the surface ozone seasonal cycle over the northeastern United States, Clifton, Olivia E.; Fiore, Arlene M.; Correa, Gustavo; Horowitz, Larry W.; Naik, Vaishali Geophysical Research Letters, Volume: 41 (2014) 10.1002/2014GL061378
Pratigya Polissar
Personal Information
Pratigya
Polissar
Lamont Associate Research Professor
Lamont-Doherty Earth Observatory
Biology and Paleo Environment
Contact Information
210 Geoscience
61 Route 9W - PO Box 1000
Palisades
NY
10964
US
(845) 365-8400

Fax: 

(845) 365-8150
Education
Ph.D.
University of Massachusetts, Amherst
05/2005
M.Sc.
University of Massachusetts, Amherst
08/1999
B.A.
Hampshire College
05/1995
Committee member of Jonathan LaRiviere (University of California, Santa Cruz)
Committee member of Cassaundra Meyers (DEES, Columbia)
Committee member of Yonaton Golsdsmith (DEES, Columbia)
Selected Publications:
Reduced El Niño–Southern Oscillation during the Last Glacial Maximum, Ford, H.L.; Ravelo, A.C.; Polissar, P.J. Science 01/2015, Volume: 347, Issue: 6219 p.: 255-258 (2015) 10.1126/science.1258437
Glacial-Interglacial Changes in Central Tropical Pacific Surface Seawater Property Gradients, Lynch-Stieglitz, J.; Polissar, P.; Jacobel, A.W.; Hovan, S.; Pockalny, R.; Lyle, M.; Murray, R.; Ravelo, A.C.; Bova, S.; Dunlea, A.; Ford, H.; Hertzberg, J.; Wertman, C.; Maloney, A.; Shackford, J.; Wejnert, K.; Xie, R. Paleoceanography (2015)
A 6,000-yr Lake Record of Drought from the Pacific Northwest, Nelson, D. N.; Abbott, M. B.; Steinman, B.; Polissar, P. J.;Stansell, N.S.; Ortiz, J. S.; Rosenmeier, M. F.; Finney, B.; Riedel, J. Proceedings of the National Academy of Sciences (2011) 10.1073/pnas.1009194108
Extractable organic material in fault zones as a tool to investigate frictional stress, Polissar, P. J.; Savage, H. M.; Brodsky, E. E. Earth and Planetary Science Letters (2011)
Effects of aridity and vegetation on plant-wax δD in modern lake sediments, Polissar, Pratigya J.; Freeman, Katherine H. Geochimica et Cosmochimica Acta, Volume: 74 p.: 5785-5797 (2010) 10.1016/j.gca.2010.06.018
Paleoaltimetry of the Tibetan Plateau from D/H ratios of lipid biomarkers, Polissar, P. J.;Freeman K. H.;Rowley D. B.;Mcinerney F. A.;Currie B. S. Earth and Planetary Science Letters, Volume: 287 p.: 64-76 (2009) 10.1016/j.epsl.2009.07.037
Measurement of 13C and 15N Isotopic Composition on Nanomolar Quantities of C and N, Polissar, P. J.; Fulton, J. M.; Junium,C. K.;Turich,C. C.;Freeman, K. H. Analytical Chemistry, Volume: 81, Issue: 2 p.: 755-763 (2009) 10.1016/j.yqres.2006.07.005
Last Glacial Maximum equilibrium-line altitude and paleo-temperature reconstructions for the Cordillera de Mérida, Venezuelan Andes, Stansell, N.; Polissar, P. J.;Abbott, M. B. Quaternary Research, Volume: 67 p.: 115-127 (2007) 10.1016/j.yqres.2006.07.005
Solar modulation of Little Ice Age climate in the tropical Andes, Polissar, P. J.; Abbott, M. B.;Wolfe, A. P.;Bezada, M.;Rull, V.;Bradley, R. S. Proceedings of the National Academy of Sciences, Volume: 103, Issue: 24 p.: 8937-8942 (2006) 10.1073 pnas.0603118103
Hydrologic balance of tropical South America from oxygen isotopes of lake sediment opal, Polissar, P. J.; Abbott, M. B.; Shemesh, A.; Wolfe, A. P.;Bradley, R. S. Earth and Planetary Science Letters, Volume: 242 p.: 375-389 (2006) 10.1016/j.epsl.2005.12.024
Late Quaternary deglacial history of the Mérida Andes, Venezuela, Stansell, N. D.;Abbott, M. B.;Polissar, P. J.;Wolfe, A. P.;Bezada, M.;Rull, V. Journal of Quaternary Science, Volume: 20, Issue: 7-8 p.: 801-812 (2005) doi:10.1002/jqs.973
15,000-yr pollen record of vegetation change in the high altitude tropical Andes at Laguna Verde Alta, Venezuela, Rull, V.;Abbott, M. B.;Polissar, P. J.; Wolfe, A. P.;Bezada, M.;Bradley, R. S. Quaternary Research, Volume: 64 p.: 308-317 (2005) 10.1016/j.yqres.2005.08.014
Lake records of Holocene climate change, Cordillera de Mérida, Venezuela, Polissar, Pratigya J. Geosciences, Amherst (2005)
Holocene paleohydrology and glacial history of the central Andes using multiproxy lake sediment studies, Abbott, M. B.; Wolfe, B. B.; Wolfe, A. P.; Seltzer, G. O.; Aravena, R.; Mark, B. G.; Polissar, P. J.;Rodbell, D. T.;Rowe, H. D.;Vuille, M. Palaeogeography, Palaeoclimatology, Palaeoecology, Volume: 194 p.: 123-138 (2003) 10.1016/S0031-0182(03)00274-8
Carbon isotopes in aquatic plants, Long Valley caldera, California as records of past hydrothermal and magmatic activity, Reid Jr., J. B.;Reynolds, J. L.; Connolly, N. T.; Getz, S. L.; Polissar, P. J.; Winship, L. J.; Hainsworth, L. J. Geophysical Research Letters, Volume: 25, Issue: 15 p.: 2853-2856 (1998) 10.1029/98GL01854
Using the sunspot cycle to date ice cores, Steig, E. J.;Morse, D. L.; Waddington, E. D.; Polissar, P. J. Geophysical Research Letters, Volume: 25, Issue: 2 p.: 163-166 (1998) 10.1029/97GL03566
Large amplitude solar modulation cycles of 10Be in Antarctica: implications for atmospheric mixing processes and interpretation of the ice core record, Steig, E. J.; Polissar, P. J.; Stuiver, M.; Grootes, P. M.; Finkel, R. C. Geophysical Research Letters, Volume: 23, Issue: 5 p.: 523 (1996) 10.1029/96GL00255
Sliding rocks at the Racetrack, Death Valley: What makes them move?, Reid Jr., J. B.; Bucklin, E. P.; Copenagle, L.; Kidder, J.; Pack, S. M.; Polissar, P. J.;Williams, M. L. Geology, Volume: 23, Issue: 9 p.: 819-822 (1995) 10.1130/0091-7613(1995)​023<0819:SRATRD>​2.3.CO;2
Edward R. Cook
Personal Information
Edward
R.
Cook
Ewing Lamont Research Professor
Lamont-Doherty Earth Observatory
Biology and Paleo Environment
Director of Tree-Ring Lab
Contact Information
Tree Ring Lab
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8618

Fax: 

(845) 365-8150
Mark A. Norell
Personal Information
Mark
A.
Norell
American Museum of Natural History
Earth and Environmental Sciences
Professor - Richarg Gilder Graduate School (AMNH)
Contact Information
Dept. of Earth & Planetary Science
Central Park West at 79th Street
New York
NY
10024-5192
US
(212) 769-5804

Fields of interest: 

Paleoclimate, paleoecology, climate modeling, wetland carbon storage, palynology.
Education
Ph.D.
New York University
1983
Master of Science
New York University
1979
Bachelor of Arts
Duke University
1974
Dorothy M. Peteet
Personal Information
Dorothy
M.
Peteet
Adjunct Senior Research Scientist
Lamont-Doherty Earth Observatory
Biology and Paleo Environment
Adjunct Professor
Earth and Environmental Sciences
Contact Information
15 Geochemistry
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8420

Fax: 

(845) 365-8154

Fields of interest: 

Paleoclimate, paleoecology, climate modeling, wetland carbon storage, palynology.

In the face of a rapidly changing climate today, we can turn to the landscapes around us as well as their historical archives to give us the best possible hints of the magnitude and rapidity of past climate shifts, and their relevance for our future. Our group utilizes field trips to wetlands (salt marshes, fresh marshes, bogs, fens, and swamps) to combine the study of modern plant ecology with retrieval of long sediment cores.

Our research includes travel to Siberia, Alaska, southeastern US, and Easter Island as well as the Hudson River marshes, Black Rock Forest, NY and upland nearby lakes. From these cores we analyze pollen, spores, and plant and animal macrofossils. We are particularly interested in abrupt climate change and patterns of droughts and floods as well as warm intervals and recent coolings such as the Little Ice Age.

Patterns and rates of plant migration are documented using our macrofossil studies in combination with pollen stratigraphy. We target disturbances such as land use change and fire at the local and regional level. Carbon sequestration in wetlands is a more recent focus, with changes in sequestration linked to climate change. Global climate modeling (GCM) at GISS is utilized to understand mechanisms and causes of climatic change.

Education
Ph.D.
New York University
1983
Master of Science
New York University
1979
Bachelor of Arts
Duke University
1974
Selected Publications:
Responses of an arctic landscape to Lateglacial and early Holocene climatic changes: the importance of moisture, Mann, D. H.; Peteet, D. M.; Reanier, R. E.; Kunz, M. L. Quaternary Science Reviews Apr, Volume: 21, Issue: 8-9 p.: 997-1021 (2002) Pii S0277-3791(01)00116-0
Sensitivity and rapidity of vegetational response to abrupt climate change, Peteet, D. Proceedings of the National Academy of Sciences of the United States of America Feb 15, Volume: 97, Issue: 4 p.: 1359-1361 (2000)
Late-glacial to early Holocene climate changes from a central Appalachian pollen and macrofossil record, Kneller, M.; Peteet, D. Quaternary Research Mar, Volume: 51, Issue: 2 p.: 133-147 (1999)