Paleoclimate

Paleoclimate scientists attempt to understand fundamental aspects of the Earth's Climate System by using natural recorders of past climate change together with climate models to identify regional, hemispheric or inter-hemispheric climate patterns, and to provide the baseline for ongoing and future climate change. These disciplines use marine and terrestrial climate archives (including ocean and lake sediments, fossil corals, speleothems, ice cores, terrestrial sediments, tree rings etc) to create a record of climate changes and variabilities ranging from sub-annual timescales to millions of years. Research interests within the department include reconstructing changes in ocean chemistry and circulation, changes in the carbon cycle, in temperature and precipitation patterns, sea-level and global ice volume, atmospheric circulation and aerosol changes, mountain glacier fluctuations and changes in land-ocean interactions. We use biological, chemical, mineralogic, and isotopic measurements together with climate models to develop a global scale perspective on our climate system. The Paleoclimate faculty includes Columbia University geologists, biologists, geochemists, atmospheric scientists as well as scientists at the NASA Goddard Institute for Space Studies and the American Museum of Natural History.

Bärbel Hönisch
Personal Information
Bärbel
Hönisch
Associate Professor
Earth and Environmental Sciences
Geochemistry
Contact Information
229 Comer
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8828

Fax: 

(845) 365-8155

Fields of interest: 

Paleoclimatology, Paleoceanography, Biological Oceanography

My main interest is focussed on the understanding and reconstruction of past marine carbonate chemistry. Specifically, I seek to validate and apply the boron isotope proxy for past seawater pH. The methods used for the validation work are culture experiments with living planktic foraminifers, as well as observations on planktic and benthic foraminifers from coretop sediments, and now also bamboo corals. Specifically I studied the influence of symbiont photosynthesis on the pH recorded by planktic foraminifers (Hönisch et al., 2003) and scleractinian corals (Hönisch et al., 2004). The boron isotopic composition of symbiont-bearing planktic foraminifers also changes with foraminiferal shell size, as it appears that larger individuals spend relatively more time closer to the seasurface where light levels are higher and symbiont photosynthesis is stronger (Hönisch and Hemming, 2004). In the latter study we also describe a significant post-depositional dissolution effect on the boron isotopic composition in foraminifera shells. Although these side effects are significant, the detailed knowledge of these proxy limitations now allows us to carefully select sample material for paleoreconstructions. I am currently applying the boron isotope proxy to reconstruct ocean acidification across the Paleocene/Eocene Thermal Maximum.

The B/Ca proxy for marine carbonate chemistry is fairly new and we continue to test it in culture experiments Allen et al., 2011, Allen et al., 2012), where we can control environmental conditions. I am also particularly interested in testing proxy relationships of times when the minor and trace element composition of seawater was different from today.

Some of my projects include:

  • Testing Geochemical proxy relationships under variable paleo-seawater chemical conditions
  • Reconstructing surface ocean acidification at the PETM
  • Validating the boron isotope proxy in deep-sea corals and tracing anthropogenic CO2 invasion
Education
Ph.D.
Alfred Wegener Institute for Polar and Marine Research (AWI) and University of Bremen
2002
Diplom (equal to MS)
University of Bremen
1999
Vordiplom (equal to BA)
University of Bielefeld
1995
Caroline Baptist
Selected Publications:
The influence of salinity on Mg/Ca ratios of cultured and core-top planktic foraminifers, Hönisch, B., K.A. Allen, D.W. Lea, H.J. Spero, S.M. Eggins, J. Arbuszewski, P. deMenocal, Y. Rosenthal, A.D. Russell Geochimica et Cosmochimica Acta, Volume: 121 p.: 196-213 (2013) 10.1016/j.gca.2013.07.028
The Geological Record of Ocean Acidification, Hönisch, B.; A. Ridgwell; D.N. Schmidt; E. Thomas; S.J. Gibbs; A. Sluijs; R.E. Zeebe; L. Kump; R.C. Martindale; S.E. Greene; W. Kiessling; J. Ries; J. Zachos; D.L. Royer; S. Barker; T.M. Marchitto Jr.; R. Moyer; C. Pelejero; P. Ziveri; G.L. Foster; and B. Science, Volume: 335, Issue: 1058 (2012)
Atmospheric Carbon Dioxide Concentration over the Mid Pleistocene Transition, Hönisch, B.; Hemming, N.G.; Archer, D.; Siddall, M.; McManus, J.F. Science, Volume: 324 p.: 1551-1554 (2009)
Robert F. Anderson
Personal Information
Robert
F.
Anderson
Ewing Lamont Research Professor
Lamont-Doherty Earth Observatory
Geochemistry
Adjunct Professor
Earth and Environmental Sciences
Contact Information
231 Comer
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8508

Fax: 

(845) 365-8155

Fields of interest: 

Chemical Oceanography, Marine Biogeochemistry, Paleoclimatology

CHEMICAL OCEANOGRAPHY, I am involved in planning an international program to study the marine biogeochemical cycles of trace elements and isotopes, known as GEOTRACES. GEOTRACES will study trace elements that serve as essential micronutrients for marine organisms, trace elements and isotopes that serve as proxies for past ocean conditions, and radionuclides that allow us to derive rates of processes of interest to oceanographers, such as fluxes of particulate oganic carbon exported from surface waters.

MARINE BIOGEOCHEMISTRY, I am interested in the ocean carbon cycle and its sensitivity to global change. This interest spans a range of topics, from climate-related changes in the ocean's carbon cycle in the past, associated with changes in ocean circulation and marine ecosystems, to understanding the fluxes of carbon in the modern ocean, to predicting the ocean's response to anticipated global warming, and the implications for the ocean's uptake of fossil fuel CO2. Of particular interest is the Southern Ocean, around Antarctica, where deep waters exchange carbon dioxide andother gases with the atmosphere, and where ecosystems are particularly sensitive to perturbations in ways that may impact the ocean's carbon cycle.

PALEOCLIMATOLOGY, My interest in paleoclimate is, in a way, an application of the principles learned through the study of modern ocean processes. My main interests are in understanding climate related changes in ocean circulation and in marine ecosystems (both ecosystem structure and biological productivity) across glacial-interglacial cycles, as well as during events of shorter duration (i.e., abrupt climate change). Much of my effort is focused on developing, testing and validating (or rejecting!) methods used in paleoceanography.

 

PDF files of three recent papers that discuss the end of the last ice age can be downloaded here:

Anderson et al., Deglacial CO2, Science, 2009

Denton et al., The last glacial termination, Science 2010

Uncorking the Southern Ocean's Vintage CO2provides a brief comparison to two leading hypotheses to expain the ocean's release of vast quantities of carbon dioxide as the last ice age ended.  These hypotheses involve changes in ocean circulation (bipolar seewaw) and changes in global wind patterns (the "wind hypothesis").  

Education
Ph.D. Chemical Oceanography
Massachusetts Institute of Technology/ Woods Hole Oceanographic Institution
1981
B.S. Oceanography and Chemistry (double major)
University of Washington
1975
Christopher Hayes (PhD 2013)
Selected Publications:
Using the natural spatial pattern of marine productivity in the Subarctic North Pacific to evaluate paleoproductivity proxies, Serno, S.; Winckler, G; Anderson, R.F.; Hayes, C.T.; Ren, H.; Gersonde, R.; Haug, G.H. Paleoceanography, Volume: 29, Issue: 5 p.: 438-453 (2014) 10.1002/2013PA002594
Eolian dust input to the Subarctic North Pacific, Serno, S.; Winckler, G.; Anderson, R.F.; Hayes, C.T.; McGee, D.; Machalett, B.; Ren, H.; Straub, S.M.; Gersonde, R.; Haug, G.H. Earth and Planetary Science Letters, Volume: 387 p.: 252-263 (2014)
Biogeography in Pa-231/Th-230 ratios and a balanced Pa-231 budget for the Pacific Ocean, Hayes, C.T.; Anderson, R.F.; Fleisher, M.Q.; Serno, S.; Winckler, G.; Gersonde, R. Earth and Planetary Science Letters, Volume: 391 p.: 307-318 (2014)
GEOTRACES: Changing the way we explore ocean chemistry, Anderson, R F; Mawji, E; Cutter G A; Measures C I; Jeandel C. Oceanography, Volume: 27 p.: 50-61 (2014)
Deep ocean carbonate chemistry and glacial-interglacial atmospheric CO2 changes, Yu, J; Anderson, R F; Rohling, E. Oceanography, Volume: 27 p.: 16-25 (2014)
Iron fertilization of the Subantarctic Ocean during the Last Ice Age, Martinez-Garcia, A; Sigman, D M; Ren, H; Anderson, R F; Straub, M; Hodell, D A; Jaccard, S L; Eglinton, T I; Haug, G H. Science, Volume: 343 p.: 1347-1350 (2014)
Two Modes of Change in Southern Ocean Productivity Over the Past Million Years, Jaccard, S. L.; Hayes, C. T.; Martinez-Garcia, A.; Hodell, D. A.; Anderson, R. F.; Sigman, D. M.; Haug, G. H. Science, Volume: 339 (2013) 10.1126/science.1227545
Quantifying lithogenic inputs to the North Pacific Ocean using the long-lived thorium isotopes, Hayes, C.T.; Anderson, R.F.; Fleisher, M.Q.; Serno, S.; Winckler, G.; Gersonde, R. Earth and Planetary Science Letters, Volume: 383 p.: 16-25 (2013)
A new perspective on boundary scavenging in the North Pacific Ocean, Hayes, C T; Anderson, R F; Jaccard, S L; François, R; Fleisher, M Q; Soon, M; Gersonde, R. Earth and Planetary Science Letters, Volume: 369-370 p.: 86-97 (2013)
Responses of the deep ocean carbonate system to carbon reorganization during the Last Glacial interglacial cycle, Yu, J; Anderson, R F; Jin, Z; Rae, J W B; Opdyke, B N; Eggins, S M. Quaternary Science Reviews, Volume: 76 p.: 39-52 (2013)
Analysis of 232Th, 230Th and 231Pa in seawater: Lessons learned during GEOTRACES Intercalibration, Auro, M; Robinson, L F; Burke, A; Bradtmiller, L I; Fleisher, M Q; Anderson, R F. Limnology and Oceanography: Methods, Volume: 10 p.: 464-474 (2012)
The mystery of the missing deglacial carbonate preservation maximum, Mekik, F A; Anderson, R F; Loubere, P; François, R; Richaud, M Quaternary Science Reviews, Volume: 39 p.: 60-72 (2012)
GEOTRACES Intercalibration of 230Th, 232Th, 231Pa and prospects for 10Be, Anderson, R F; Fleisher, M Q; Robinson, L F; Edwards, R L; Hoff, J A; Moran, S B; Rutgers van der Loeff, M; Thomas, A L; Roy-Barman, M; François, R. Limnology and Oceanography: Methods (2012)
The Zn abundance and isotopic composition of diatom frustules, a proxy for Zn availability in ocean surface seawater, Andersen, M. B.; Vance, D.; Archer, C.; Anderson, R. F.; Ellwood, M. J.; Allen, C. S. Earth and Planetary Science Letters, Volume: 301 p.: 137-145 (2011)
Opal accumulation rates in the equatorial Pacific and mechanisms of deglaciation, Hayes, C T; Anderson, R F; Fleisher; M Q . Paleoceanography, Volume: 25 p.: PA1207 doi:101029/2010PA002008 (2011)
The last glacial termination, Denton, G. H.; Anderson, R. F.; Toggweiler, J. R.; Edwards, R. L.; Schaefer, J. M.; Putnam, A. E Science, Volume: 328 p.: 1652-1656 (2010)
A deeper respired carbon pool in the glacial equatorial Pacific Ocean, Bradtmiller, L. I.; Anderson, R. F.; Sachs, J. P.; Fleisher, M. Q. Earth and Planetary Science Letters, Volume: 299 p.: 417-425 (2010)
Sedimentary opal records in the Eastern Equatorial Pacific: It’s not all about leakage, Dubois, N.; Kienast, M.; Kienast, S.; Calvert, S. E.; Francois, R.; Anderson, R. F. Global Biogeochemical Cycles, Volume: 24 (2010) GB4020 doi:10.1029/2010GB003821
Uncorking the Southern Ocean’s Vintage CO2, Anderson, R. F.; Carr, M-E Science 05/2010, Volume: 328 p.: 1117-1118 (2010)
Wind-Driven Upwelling in the Southern Ocean and the Deglacial Rise in Atmospheric CO2, Anderson, R. F.; Ali, S.; Bradtmiller, L. I.; Nielsen, S. H. H.; Fleisher, M. Q.; Anderson, B. E.; Burckle, L. H. Science Mar 13, Volume: 323, Issue: 5920 p.: 1443-1448 (2009) DOI 10.1126/science.1167441
Comparing glacial and Holocene opal fluxes in the Pacific sector of the Southern Ocean, Bradtmiller, L I; Anderson, R F; Fleisher, M Q; Burckle, L H Paleoceanography, Volume: 24 p.: PA2214, doi (2009)
Covariant glacial-interglacial dust fluxes in the equatorial Pacific and Antarctica, Winckler, G.; Anderson, R. F.; Fleisher, M. Q.; McGee, D.; Mahowald, N. Science Apr 4, Volume: 320, Issue: 5872 p.: 93-96 (2008) DOI 10.1126/science.1150595
Modeling the particle flux effect on distribution of 230Th in the equatorial Pacific, Siddall, M.; Anderson, R.F.; Winkler, G.; Henderson, G.M.; Bradtmiller, L.I.; McGee, D.; Franzese, A.; Stocker, T.F.; Müller, S.A. Paleoceanography, Volume: 23, Issue: PA2208 (2008) 10:1020/2007PA001556
Modern CaCO3 preservation in equatorial Pacific sediments in the context of late-Pleistocene glacial cycles, Anderson, R. F.; Fleisher, M. Q.; Lao, Y.; Winckler, G. Marine Chemistry Aug 16, Volume: 111, Issue: 1-2 p.: 30-46 (2008) DOI 10.1016/j.marchem.2007.11.011
Comment on "Do geochemical estimates of sediment focusing pass the sediment test in the equatorial Pacific?' by M. Lyle et al., Francois, R.; Frank, M.; van der Loeff, M. R.; Bacon, M. P.; Geibert, W.; Kienast, S.; Anderson, R. F.; Bradtmiller, L.; Chase, Z.; Henderson, G.; Marcantonio, F.; Allen, S. E. Paleoceanography Mar 6, Volume: 22, Issue: 1 p.: - (2007) Doi 10.1029/2005pa001235
Opal burial in the equatorial Atlantic Ocean over the last 30 ka: Implications for glacial-interglacial changes in the ocean silicon cycle, Bradtmiller, L. I.; Anderson, R. F.; Fleisher, M. Q.; Burckle, L. H. Paleoceanography Dec 19, Volume: 22, Issue: 4 p.: - (2007) Doi 10.1029/2007pa001443
Diatom productivity in the equatorial Pacific Ocean from the last glacial period to the present: A test of the silicic acid leakage hypothesis, Bradtmiller, L. I.; Anderson, R. F.; Fleisher, M. Q.; Burckle, L. H. Paleoceanography Oct 13, Volume: 21, Issue: 4 p.: - (2006) Doi 10.1029/2006pa001282
Glacial-interglacial variability in the delivery of dust to the central equatorial Pacific Ocean, Anderson, R. F.; Fleisher, M. Q.; Lao, Y. Earth and Planetary Science Letters Feb 28, Volume: 242, Issue: 3-4 p.: 406-414 (2006) DOI 10.1016/j.epsl.2005.11.061
Reduced Agulhas Leakage during the Last Glacial Maximum inferred from an integrated provenance and flux study, Franzese, A. M.; Hemming, S. R.; Goldstein, S. L.; Anderson, R. F. Earth and Planetary Science Letters Oct 15, Volume: 250, Issue: 1-2 p.: 72-88 (2006) DOI 10.1016/j.epsl.2006.07.002
Equatorial Pacific productivity and dust flux during the mid-Pleistocene climate transition, Winckler, G.; Anderson, R. F.; Schlosser, P. Paleoceanography Dec 17, Volume: 20, Issue: 4 p.: - (2005) Doi 10.1029/2005pa001177
Increased productivity in the subantarctic ocean during Heinrich events, Sachs, J. P.; Anderson, R. F. Nature Apr 28, Volume: 434, Issue: 7037 p.: 1118-1121 (2005) Doi 10.1038/Nature03544
Problems with paleoproductivity proxies, Anderson, R. F.; Winckler, G. Paleoceanography Sep 20, Volume: 20, Issue: 3 p.: - (2005) Doi 10.1029/2004pa001107
Role of marine biology in glacial-interglacial CO2 cycles, Kohfeld, K. E.; Le Quere, C.; Harrison, S. P.; Anderson, R. F. Science Apr 1, Volume: 308, Issue: 5718 p.: 74-78 (2005) DOI 10.1126/science.1105375
Sr isotope evidence for sources of terrigenous sediment in the southeast Atlantic Ocean: Is there increased available Fe for enhanced glacial productivity?, Rutberg, R. L.; Goldstein, S. L.; Hemming, S. R.; Anderson, R. F. Paleoceanography Mar 30, Volume: 20, Issue: 1 p.: - (2005) Doi 10.1029/2003pa000999
Comment on "On the importance of opal, carbonate, and lithogenic clays in scavenging and fractionating Th-230, Pa-231 and Be-10 in the ocean" by S. Luo and T.-L. Ku, Chase, Z.; Anderson, R. F. Earth and Planetary Science Letters Mar 30, Volume: 220, Issue: 1-2 p.: 213-222 (2004) Doi 10.1016/S0012-821x(04)00028-7
Does interplanetary dust control 100 kyr glacial cycles?, Winckler, G.; Anderson, R. F.; Stute, M.; Schlosser, P. Quaternary Science Reviews Oct, Volume: 23, Issue: 18-19 p.: 1873-1878 (2004) DOI 10.1016/j.quascirev.2004.05.007
Radiocarbon dating of diatom-bound organic compounds, Ingalls, A. E.; Anderson, R. F.; Pearson, A. Marine Chemistry Dec 1, Volume: 92, Issue: 1-4 p.: 91-105 (2004) DOI 10.1016/j.marchem.2004.06.019
Accumulation of biogenic and lithogenic material in the Pacific sector of the Southern Ocean during the past 40,000 years, Chase, Z.; Anderson, R. F.; Fleisher, M. Q.; Kubik, P. W. Deep-Sea Research Part Ii-Topical Studies in Oceanography, Volume: 50, Issue: 3-4 p.: 799-832 (2003) Pii S0967-0645(02)00595-7
Assessing the collection efficiency of Ross Sea sediment traps using Th-230 and Pa-231, Fleisher, M. Q.; Anderson, R. F. Deep-Sea Research Part Ii-Topical Studies in Oceanography, Volume: 50, Issue: 3-4 p.: 693-712 (2003) Pii S0967-0645(02)00591-X
Fidelity of alkenone paleotemperatures in southern Cape Basin sediment drifts, Sachs, J. P.; Anderson, R. F. Paleoceanography Oct 15, Volume: 18, Issue: 4 p.: - (2003) Doi 10.1029/2002pa000862
Scavenging of Th-230 Pa-231 and Be-10 in the Southern Ocean (SW Pacific sector): the importance of particle flux, particle composition and advection, Chase, Z.; Anderson, R. F.; Fleisher, M. Q.; Kubik, P. W. Deep-Sea Research Part Ii-Topical Studies in Oceanography, Volume: 50, Issue: 3-4 p.: 739-768 (2003) Pii S0967-0645(02)00593-3
The U-series toolbox for paleoceanography, Henderson, G. M.; Anderson, R. F. Uranium-Series Geochemistry, Volume: 52 p.: 493-531 (2003)
Challenges in radiocarbon dating organic carbon in opal-rich marine sediments, Zheng, Y.; Anderson, R. F.; Froelich, P. N.; Beck, W.; McNichol, A. P.; Guilderson, T. Radiocarbon, Volume: 44, Issue: 1 p.: 123-136 (2002)
The influence of particle composition and particle flux on scavenging of Th, Pa and Be in the ocean, Chase, Z.; Anderson, R. F.; Fleisher, M. Q.; Kubik, P. W. Earth and Planetary Science Letters Nov 30, Volume: 204, Issue: 1-2 p.: 215-229 (2002) Pii S0012-821x(02)00984-6
Preservation of particulate non-lithogenic uranium in marine sediments, Zheng, Y.; Anderson, R. F.; Van Geen, A.; Fleisher, M. Q. Geochimica Et Cosmochimica Acta Sep, Volume: 66, Issue: 17 p.: 3085-3092 (2002) Pii S0016-7037(01)00632-9
Remobilization of authigenic uranium in marine sediments by bioturbation, Zheng, Y.; Anderson, R. F.; Van Geen, A.; Fleisher, M. Q. Geochimica Et Cosmochimica Acta May, Volume: 66, Issue: 10 p.: 1759-1772 (2002) Pii S0016-7037(00)00886-9
Sediment focusing creates 100-ka cycles in interplanetary dust accumulation on the Ontong Java Plateau, Higgins, S. M.; Anderson, R. F.; Marcantonio, F.; Schlosser, P.; Stute, M. Earth and Planetary Science Letters Oct 15, Volume: 203, Issue: 1 p.: 383-397 (2002) Pii S0012-821x(02)00864-6
Vertical budgets for organic carbon and biogenic silica in the Pacific sector of the Southern Ocean, 1996-1998, Nelson, D. M.; Anderson, R. F.; Barber, R. T.; Brzezinski, M. A.; Buesseler, K. O.; Chase, Z.; Collier, R. W.; Dickson, M. L.; Francois, R.; Hiscock, M. R.; Honjo, S.; Marra, J.; Martin, W. R.; Sambrotto, R. N.; Sayles, F. L.; Sigmon, D. E. Deep-Sea Research Part Ii-Topical Studies in Oceanography, Volume: 49, Issue: 9-10 p.: 1645-1674 (2002) Pii S0967-0645(02)00005-X
The Southern Ocean's biological pump during the Last Glacial Maximum, Anderson, R. F.; Chase, Z.; Fleisher, M. Q.; Sachs, J. Deep-Sea Research Part Ii-Topical Studies in Oceanography, Volume: 49 p.: 1909-1938 (2002)
Abrupt intensification of the SW Indian Ocean monsoon during the last deglaciation: constraints from Th, Pa, and He isotopes, Marcantonio, F.; Anderson, R. F.; Higgins, S.; Fleisher, M. Q.; Stute, M.; Schlosser, P. Earth and Planetary Science Letters Jan 15, Volume: 184, Issue: 2 p.: 505-514 (2001)
Benthic remineralization and burial of biogenic SiO2, CaCO3, organic carbon, and detrital material in the Southern Ocean along a transect at 170 degrees West, Sayles, F. L.; Martin, W. R.; Chase, Z.; Anderson, R. F. Deep-Sea Research Part Ii-Topical Studies in Oceanography, Volume: 48, Issue: 19-20 p.: 4323-4383 (2001)
Evidence from authigenic uranium for increased productivity of the glacial Subantarctic Ocean, Chase, Z.; Anderson, R. F.; Fleisher, M. Q. Paleoceanography Oct, Volume: 16, Issue: 5 p.: 468-478 (2001)
Glacial surface temperatures of the southeast Atlantic Ocean, Sachs, J. P.; Anderson, R. F.; Lehman, S. J. Science Sep 14, Volume: 293, Issue: 5537 p.: 2077-2079 (2001)
Record of seafloor CaCO3 dissolution in the central equatorial Pacific, Broecker, W. S.; Anderson, R.; Clark, E.; Fleisher, M. Geochemistry Geophysics Geosystems Jun 28, Volume: 2 p.: art. no.-2000GC000151 (2001)
Sediment focusing in the central equatorial Pacific Ocean, Marcantonio, F.; Anderson, R. F.; Higgins, S.; Stute, M.; Schlosser, P.; Kubik, P. Paleoceanography Jun, Volume: 16, Issue: 3 p.: 260-267 (2001)
Similar glacial and Holocene Southern Ocean hydrography, Matsumoto, K.; Lynch-Stieglitz, J.; Anderson, R. F. Paleoceanography Oct, Volume: 16, Issue: 5 p.: 445-454 (2001)
The US Southern Ocean Joint Global Ocean Flux Study: Volume two, Anderson, R. F.; Smith, W. O. Deep-Sea Research Part Ii-Topical Studies in Oceanography, Volume: 48, Issue: 19-20 p.: 3883-3889 (2001)
Authigenic molybdenum formation in marine sediments: A link to pore water sulfide in the Santa Barbara Basin, Zheng, Y.; Anderson, R. F.; van Geen, A.; Kuwabara, J. Geochimica Et Cosmochimica Acta Dec, Volume: 64, Issue: 24 p.: 4165-4178 (2000)
Carbon isotopic disequilibrium in polar planktonic foraminifera and its impact on modern and Last Glacial Maximum reconstructions, Kohfeld, K. E.; Anderson, R. F.; Lynch-Stieglitz, J. Paleoceanography Feb, Volume: 15, Issue: 1 p.: 53-64 (2000)
Intensification of the northeast Pacific oxygen minimum zone during the Bolling-Allerod warm period, Zheng, Y.; van Geen, A.; Anderson, R. F.; Gardner, J. V.; Dean, W. E. Paleoceanography Oct, Volume: 15, Issue: 5 p.: 528-536 (2000)
Recent warming in a 500-year palaeotemperature record from varved sediments, Upper Soper Lake, Baffin Island, Canada, Hughen, K. A.; Overpeck, J. T.; Anderson, R. F. Holocene Jan, Volume: 10, Issue: 1 p.: 9-19 (2000)
A review of the Si cycle in the modem ocean: recent progress and missing gaps in the application of biogenic opal as a paleoproductivity proxy, Ragueneau, O.; Treguer, P.; Leynaert, A.; Anderson, R. F.; Brzezinski, M. A.; DeMaster, D. J.; Dugdale, R. C.; Dymond, J.; Fischer, G.; Francois, R.; Heinze, C.; Maier-Reimer, E.; Martin-Jezequel, V.; Nelson, D. M.; Queguiner, B. Global and Planetary Change Dec 15, Volume: 26, Issue: 4 p.: 317-365 (2000)
The US Southern Ocean Joint Global Ocean Flux Study: an introduction to AESOPS, Smith, W. O.; Anderson, R. F.; Moore, J. K.; Codispoti, L. A.; Morrison, J. M. Deep-Sea Research Part Ii-Topical Studies in Oceanography, Volume: 47, Issue: 15-16 p.: 3073-3093 (2000)
Peter B. deMenocal
Personal Information
Peter
B.
deMenocal
Professor
Earth and Environmental Sciences
Biology and Paleo Environment
Contact Information
207 Geoscience
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8483

Fax: 

(845) 365-8150

Fields of interest: 

Paleoceanography and Paleoclimatology

I study marine sediment to reconstruct past changes in ocean circulation and terrestrial climate. Our group primarily uses stable isotopic and trace metal (Mg/Ca) analyses of foraminifera and terrigenous sediment geochemistry to investigate how and why climates have changed in the past. Recent research projects include: Holocene climate and ocean circulation variability

Some of my projects include:

  • African climate change and Human evolution ( details )
  • Holocene climate variability ( details )
  • Abrupt onset and termination of the African Humid Period ( details )
  • Cultural responses to Holocene climate changes ( details )
  • Mollusc geochemistry and reconstructing seasonal to multiannual records of coastal oceean temperatures ( details)

 

 

Education
Ph.D. (Geology)
Columbia University
1991
M.S. (Oceanography)
University of Rhode Island, Graduate School of Oceanography
1986
B.S. (Geology) cum laude
St. Lawrence University
1982
James D. Hays
Personal Information
James
D.
Hays
Professor Emeritus
Earth and Environmental Sciences
Biology and Paleo Environment
Co-Chair - Task Force on Undergraduate Education
Columbia University
Special Research Scientist
Lamont-Doherty Earth Observatory
Contact Information
104 Core Lab
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8403

Fax: 

(845) 365-8150

Fields of interest: 

Climate change history; evolutionary history of microfossils

I have spent my research career studying deep-sea cores in an effort to read some meaningful history from the minerals and fossils they contain. My interests now include the history of climate change over the past three million years, specifically the factors that contributed to the initiation of large advances and retreats of northern hemisphere glaciers toward the beginning of this period and why the climate response of the two hemispheres is so extraordinarily symmetrical despite asymmetrical geography and forcing.

A second kind of history that has caught my fancy is the evolutionary history recorded by the myriad microfossil specimens entombed in as little as a gram of deep-sea sediments. Migrations, speciations and extinctions all can be precisely documented in space and time through our global array of deep-sea cores.

I work primarily with a group of siliceous microfossils known as Radiolaria. These extraordinarily beautiful microfossils have large numbers of species in both high and low latitudes. This high diversity has made them useful stratigraphically and is proving important in their paleoecological and paleobiological utility.

Education
Ph.D.
Columbia
1964
Master of Science
Ohio State
1960
Bachelor of Arts
Harvard
1956
Jordan Abell
Personal Information
Jordan
Abell
Contact Information
Robert Sandstrom
Personal Information
Robert
Sandstrom
Graduate Student
Earth and Environmental Sciences
Biology and Paleo Environment
Contact Information
104 Geoscience
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8727

Fax: 

(845) 365-8150

Fields of interest: 

Paleo sea level reconstructions through coastal geomorphology and marine carbonate dating.
Education
PhD Graduate Student
Columbia University
Current
B.A
Vassar College
05/2012
Laura Haynes
Personal Information
Laura
Haynes
Graduate Student
Earth and Environmental Sciences
Geochemistry
Contact Information
207 Comer
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8609

Fax: 

(845) 365-8155

Fields of interest: 

paleoceanography, paleoclimatology, proxy development

My current work focuses on the development of the B/Ca proxy in planktic foraminifera for reconstructing ocean acidification at the Paleocene-Eocene Thermal Maximum (56 ma). To do this, we are undertaking culture experiments in multiple species to constrain the effects of variable paleo-seawater chemistry on the behavior of the proxy and its response to multiple carbonate chemistry parameters.

Education
M.Phil.
Columbia University
01/2017
M.A.
Columbia University
04/2015
B.A.
Pomona College
05/2013
Selected Publications:
Calibration of the B/Ca proxy in the planktic foraminifer Orbulina universa to Paleocene seawater conditions, Haynes, L. L; Hönisch, B.; Dyez, K.; Holland, K.; Rosenthal, Y.; Fish, C.; Subhas, A.; Rae, J.W.B Paleoceanography, Volume: 32 (2017)
Alejandra Borunda
Personal Information
Alejandra
Borunda
Graduate Research Fellow
Earth and Environmental Sciences
Geochemistry
Contact Information
borunda.jpg
427 Comer
61 Route 9W - PO Vox 1000
Palisades
NY
10964-8000
US
(845) 365-8572

Fax: 

(845) 365-8155
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

Pages