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Graduate Student
Earth and Environmental Sciences
421 Comer
61 Route 9W - PO Box 1000
(845) 365-8926
(845) 365-8155


Fields of interest: 
Paleoclimatology, paleoceanography, isotope geochemistry

 My research goals focus on furthering our understanding of the climate system through the application of geochemical techniques and reconstruction of paleoclimatic records. Specifically, I am interested in glacial/interglacial tranistions in climate and the mechanisms that amplify insolation forcing. My current project focuses on reconstructing past movements of the Intertropical Convergence Zone (ITCZ) using 232Th, (231Pa/230Th)xs,0 and and 230Th normalized productivity proxies.  The goal of this project is to ground-truth hypotheses about the mechanisms moving CO2 to/from the deep ocean on glacial/interglacial timescales.

List of degrees from highest to lowest:
M.A. Earth and Environmental Studies
Columbia University
B.A. Geology
Macalester College
Honors & Awards: 
Columbia Climate Center Grant 2015
GSA Charles A. & June R.P. Ross Research Award 2015
GSA Graduate Student Research Grant 2015
Kenneth and Linda Ciriacks Graduate Fellowship Fund in Earth and Environmental Sciences 2015
Columbia Climate Center Grant 2014
NSF Stable Isotope Course Fellowship 2014
NSF Urbino Paleoclimate Summer School Fellowship 2013
NSF GRFP Honorable Mention 2012
Barry M. Goldwater Scholar 2011

Research Blogs:

Selected Publications:

Large Deglacial Shifts of the Pacific Intertropical Convergence Zone. Nature Geoscience Jacobel, A.W.; McManus, J.F.; Anderson, B.A.; Winckler, G. Nature Geoscience (Submitted)
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)
Pentultimate Deglacial Dust Fluxes in the Equatorial Pacific: Implications for ITCZ Movement and a Common Mechanism for Glacial Terminations Jacobel, A.W.; McManus, J.F.; Anderson, B.A.; Winckler, G. Fall Meeting American Geophysical Union (2014)
Deep Equatorial Atlantic Ocean Circulation over the Last 25,000 Years – Insights from 231Pa/230Th, 14C and Sortable Silt Grain Size Ng, H.C.; Robinson, L.; McManus, J.F.; Falcon, K.M.; Jacobel, A.W. Fall Meeting of the American Geophysical Union (2014)
Heinrich-like events in the Southeast Pacific: abrupt climate change during the last interglacial Jacobel, A.W.; Mokeddem, Z.; McManus, J.F. American Geophysical Union Volume: 91 (2010)
The Indonesian Throughflow: Oceanographic Responses to Holocene Changes in the Mean Pacific State Jacobel, A.W.; Oppo, D.W.; Eglinton, T.I.; Gibbons, F.T.; Montlucon, D.M.; Rosenthal, Y.; Linsley, B.K. American Geophysical Union Volume: 90 (2009)
Evaluating the effect of coral topography on the climate signal in porites spp. Jacobel, A.W.; Quinn, T.M.; Maupin, C.W. American Geophysical Union Volume: 89 (2008)