Geochemistry

The Geochemistry faculty study a wide range of processes and interactions, including products of large-scale Earth differentiation, such as the composition, evolution and age of the mantle and core, the formation and evolution of oceanic and continental crust, interactions between the geochemical environment (soil, water, air) and human health, fundamental questions involving the oceans and continental water systems, global geochemical cycles involving the atmosphere, oceans and Earth's interior, natural and engineered methods for carbon capture and storage, and using a wide range of geochemical archives to understand how and why the ocean and climate have changed at timescales ranging from seasons to millions of years. The faculty has developed strong collaborations with Columbia University engineers, biologists, public health researchers and American Museum of Natural History petrologists, planetary geologists and paleontologists.

Logan Brenner
Personal Information
Logan
Brenner
Graduate Research Fellow
Earth and Environmental Sciences
Biology and Paleo Environment
Contact Information
105G Geoscience
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8727

Fax: 

(845) 365-8150

My paleoclimatology/paleoceanography research focuses on using fossil and modern corals to reconstruct past climate conditions. My goal is to enhance our understanding of past climate, particularly ocean conditions, through the geochemical analysis of corals. I am specifically interested in abrupt, millenial climate change and glacial/interglacial transitions. 

At the moment I am studying modern and fossil corals from the Great Barrier Reef using stable d18O analysis to compare the Last Glacial Maximum and current interglacial phase. Furthermore, the fossil corals have not yet been used in paleoclimate studies so another important focus of the project is to determine the best sampling methodology and expand the arsenal of corals used in future analyses. 

Maureen Raymo
Personal Information
Maureen
Raymo
Bruce C. Heezen/Lamont Research Professor
Lamont-Doherty Earth Observatory
Biology and Paleo Environment
Adjunct Professor
Earth and Environmental Sciences
Director - Core Repository
Lamont-Doherty Earth Observatory
Contact Information
105E Geoscience
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8801

Fax: 

(845) 365-8150
Selected Publications:
Departures from eustasy in Pliocene sea-level records, Raymo, Maureen E.; Mitrovica, Jerry X.; O'Leary, Michael J.; DeConto, Robert M.; Hearty, Paul L. NATURE GEOSCIENCE MAY, Volume: 4 p.: 328–332 (2011)
Diachronous benthic delta O-18 responses during late Pleistocene terminations, Lisiecki, Lorraine E.; Raymo, Maureen E. PALEOCEANOGRAPHY SEP 23, Volume: 24 p.: PA3210 (2009)
Plio-Pleistocene Ice Volume, Antarctic Climate, and the Global δ18O Record, Raymo, M. E., L. E. Lisiecki, and K. H. Nisancioglu Science, Volume: 313 p.: 492 (2006)
A Pliocene-Pleistocene stack of 57 globally distributed benthic delta O-18 records, Lisiecki, L. E.; Raymo, M. E. PALEOCEANOGRAPHY JAN 18, Volume: 20 p.: PA1003 (2005)
The 41 kyr world: Milankovitch's other unsolved mystery, Raymo, M. E.; Nisancioglu, K. PALEOCEANOGRAPHY MAR 6, Volume: 18 p.: 1011 (2003)
The timing of major climate terminations, Raymo, M. E. PALEOCEANOGRAPHY AUG, Volume: 12 p.: 577–585 (1997)
THE HIMALAYAS, ORGANIC-CARBON BURIAL, AND CLIMATE IN THE MIOCENE, RAYMO, ME PALEOCEANOGRAPHY JUN, Volume: 9 p.: 399–404 (1994)
Tectonic forcing of late Cenozoic climate, Raymo, M.E. and W.F. Ruddiman Nature, Volume: 359 p.: 117-122 (1992)
Evolution of Atlantic Pacific Delta-C-13 Gradients over the Last 2.5 My, Raymo, M. E.; Ruddiman, W. F.; Shackleton, N. J.; Oppo, D. W. Earth and Planetary Science Letters Mar, Volume: 97, Issue: 3-4 p.: 353-368 (1990)
Rachel Marzen
Personal Information
Rachel
Marzen
Graduate Student
Earth and Environmental Sciences
Marine Geology and Geophysics
Contact Information
302C Oceanography
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US

Fax: 

(845) 365-8156
Education
BS
Rice University
05/2015
Selected Publications:
Calcareous microfossil-based orbital cyclostratigraphy in the Arctic Ocean, Marzen, Rachel E.; DeNinno, Lauren H.; Cronin, Thomas M. Quaternary Science Reviews, Volume: 149 (2016) 10.1016/j.quascirev.2016.07.004
Late Holocene sea level variability and Atlantic Meridional Overturning Circulation, Cronin, T. M.; Farmer, J. R.; Marzen, R. E.; Thomas, E.; Varekamp, J. C. Paleoceanography, Volume: 29 (2014) 10.1002/2014PA002632
SONYA DYHRMAN
Personal Information
Sonya
Dyhrman
Associate Professor
Earth and Environmental Sciences
Biology and Paleo Environment
Contact Information
102E Geoscience
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8165

Fax: 

(845) 365-8163

I am broadly interested in how marine microbes like phytoplankton interact with their geochemical environment, where I use molecular level tools to study the intersection of microbial physiology and biogeochemistry.

Microbial oceanography group members are using a suite of genome-enabled approaches to examine the distribution and activities of marine phytoplankton, and how they influence cycling of carbon, nitrogen and phosphorus. Our work often uses model cultures to understand and bound field observations made on research cruises that span the from polar to tropical systems. This research emphasis provides advanced training for undergraduates, graduate students, and postdoctoral scholars and it is also used as a framework for the development and implementation of inquiry-based educational activities for children.

Education
Ph.D.
Scripps Institution of Oceanography, University of California San Diego
11/1999
B.A.
Dartmouth College
06/1994
Md. Rajib Mozumder
Personal Information
Md. Rajib
Mozumder
Graduate Student
Earth and Environmental Sciences
Geochemistry
Contact Information
215 Comer
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8302

Fax: 

(845) 365-8155

Fields of interest: 

hydrogeology, groundwater geochemistry, groundwater resources management
Education
M.S. in Geology
University of Dhaka
2010
B.S. in Geology
University of Dhaka
2009
Degree Project in Groundwater Chemistry
Royal Institute of Technology (KTH)
2011
William D'Andrea
Personal Information
William
D'Andrea
Lamont Associate Research Professor
Lamont-Doherty Earth Observatory
Biology and Paleo Environment
Contact Information
205D Geoscience
61 Route 9W - PO Box 1000
Palisades
NY
10964
US
(845) 365-8654

Fax: 

(845) 365-8150

My research is geared toward understanding global climate change, including current anthropogenic driven changes and past changes to the Earth System.  I investigate the natural modes and underlying forcing mechanisms of past climate variability, with the goal of developing a better understanding of how the Earth System responds to natural and human-induced perturbations.

Education
PhD
Brown University
05/2008
MSc
Brown University
05/2005
BS/BA
Binghamton University
05/2002
Thesis committee member of Laura B. Levy (Dartmouth College)
Thesis committee member of David Vaillencourt (Northern Arizona University)
Selected Publications:
Biogeochemical evidence for hydrologic changes during the Holocene in a lake record from southeast Greenland, Balascio, N.L.; D'Andrea, W.J.; Bradley, R.S.; Perren, B.B. The Holocene, Volume: 23 p.: 1428-1439 (2013) 10.1177/0959683613493938
The influence of 14C reservoir age on interpretation of paleolimnological records from the Tibetan Plateau, Hou, J; D'Andrea, W.J.; Liu, Z. Quaternary Science Reviews 07/2012, Volume: 48 p.: 13 (2012)
Proxy-to-proxy calibration: Increasing the temporal resolution of quantitative climate reconstructions, von Gunten, L; D'Andrea, W.J.; Bradley, R.S.; Huang, Y. Scientific Reports 08/2012, Volume: 2, Issue: 609 p.: 6 (2012) 10.1038/srep00609
Mild Little Ice Age and unprecedented recent warmth in an 1800 year lake sediment record from Svalbard, D'Andrea, W.J.; Vaillencourt, D.A.; Balascio, N.L.; Werner, A.; Roof, S.R.; Retelle, M.; Bradley, R.S. Geology, Volume: 40, Issue: 11 p.: 1007-1010 (2012) 10.1130/G33365.1
Abrupt Holocene climate change as an important factor for human migration in West Greenland, D'Andrea, William J.; Huang, Yongsong; Fritz, Sherilyn C.; Anderson, N. John PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA JUN 14, Volume: 108 p.: 9765–9769 (2011)
Phylogenetic diversity and evolutionary relatedness of alkenone-producing haptophyte algae in lakes: Implications for continental paleotemperature reconstructions, Theroux, Susanna; D'Andrea, William J.; Toney, Jaime; Amaral-Zettler, Linda; Huang, Yongsong EARTH AND PLANETARY SCIENCE LETTERS DEC 1, Volume: 300 p.: 311–320 (2010)
Holocene carbon burial by lakes in SW Greenland, Anderson, N. J.; D'Andrea, W.; Fritz, S. C. GLOBAL CHANGE BIOLOGY NOV, Volume: 15 p.: 2590–2598 (2009)
Can sedimentary leaf waxes record D/H ratios of continental precipitation?: Field, model, and experimental assessments, Hou, Juzhi; D'Andrea, William J.; Huang, Yongsong GEOCHIMICA ET COSMOCHIMICA ACTA JUL 15, Volume: 72 p.: 3503–3517 (2008)
Evidence for water use efficiency as an important factor in determining the delta D values of tree leaf waxes, Hou, Juzhi; D'Andrea, William J.; MacDonald, Dana; Huang, Yongsong ORGANIC GEOCHEMISTRY, Volume: 38 p.: 1251–1255 (2007)
Hydrogen isotopic variability in leaf waxes among terrestrial and aquatic plants around Blood Pond, Massachusetts (USA), Hou, Juzhi; D'Andrea, William J.; MacDonald, Dana; Huang, Yongsong ORGANIC GEOCHEMISTRY, Volume: 38 p.: 977–984 (2007)
An efficient method for isolating individual long-chain alkenones for compound-specific hydrogen isotope analysis, D'Andrea, William J.; Liu, Zhonghui; Alexandre, Marcelo Da Rosa; Wattley, Sarah; Herbert, Timothy D.; Huang, Yongsong ANALYTICAL CHEMISTRY MAY 1, Volume: 79 p.: 3430–3435 (2007)
Alkenone producers inferred from well-preserved 18S rDNA in Greenland lake sediments, D'Andrea, William J.; Lage, Melissa; Martiny, Jennifer B. H.; Laatsch, Abby D.; Amaral-Zettler, Linda A.; Sogin, Mitchell L.; Huang, Yongsong JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES SEP 19, Volume: 111 p.: G03013 (2006)
Long chain alkenones in Greenland lake sediments: Low delta C-13 values and exceptional abundance, D'Andrea, W. J.; Huang, Y. ORGANIC GEOCHEMISTRY, Volume: 36 p.: 1234–1241 (2005)
Braddock Linsley
Personal Information
Dr.
Braddock
Linsley
Lamont Research Professor
Lamont-Doherty Earth Observatory
Biology and Paleo Environment
Contact Information
104E Geoscience
61 Route 9W - PO Box 1000
Palisades
NY
10964
US
(845 365-8306

Fax: 

(845) 365-8150

Fields of interest: 

Coral-based paleoclimatology in the Indo-Pacific, Sediment records of Western Pacific Warm Pool and Indonesian Throughflow variability
Education
Ph.D. Geology
University of New Mexico
1990
M.S. Geology
University of South Carolina
1984
B.S. Geology
St. Lawrence University
1982
Emilie Dassie; former post doctoral scientist at LDEO
Selected Publications:
SPCZ Zonal Events and Downstream Influence on Surface Ocean Conditions in the Indonesian Throughflow Region, Linsley, Braddock K.; Wu, Henry C.; Rixen, Tim; Charles, Chris D.; Gordon, Arnold L: Moore, Michael D. Geophysical Research Letters, Volume: 43 (2016)
Decadal changes in South Pacific sea surface temperatures and the relationship to the Pacific decadal oscillation and upper ocean heat content, Linsley, Braddock K.; Wu, Henry C.; Dassie, Emilie P.; Schrag, Daniel P Geophysical Research Letters 04/2015, Volume: 42 p.: doi:10.1002/2015GL063045. (2015)
Oceanographic variability in the South Pacific Convergence Zone region over the last 210 years from multi-site coral Sr/Ca., Wu, Henry C; Linsley, BK; Dassie,EP, Schiraldi, B; deMenocal,PB Geochemistry, Geophysics, Geosystems (2013)
Holocene Evolution of the Indonesian Throughflow and the Western Pacific Warm Pool, Linsley, B.K.; Y. Rosenthal; D. W. Oppo, Nature Geoscience 2010, Volume: 3 p.: 578-583 (2010)
Tracking the extent of the South Pacific Convergence Zone since the early 1600s, Linsley, B. K.; Kaplan, A.; Gouriou, Y.; Salinger, J.; deMenocal, P. B.; Wellington, G. M.; Howe, S. S. Geochemistry Geophysics Geosystems May 3, Volume: 7 p.: - (2006) Doi 10.1029/2005gc001115
Beizhan Yan
Personal Information
Beizhan
Yan
Lamont Associate Research Professor
Lamont-Doherty Earth Observatory
Geochemistry
Contact Information
203 Comer
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8448

Fax: 

(845) 365-8155

Fields of interest: 

Aqueous Geochemistry, Organic Geochemistry, Environmental Exposure and Health, and Environmental Science

My research is mainly focused on two areas: 1) characterizing exposure of pollutants and investigating adverse health effects of these pollutants in urban environments and 2) apportioning contamination sources and assessing environmental impact related to human activities (e.g., the fate of contaminants after Deepwater Horizon Oil Spill and impact of hydraulic fracturing on water and air quality).

The ability to unambiguously identify and measure trace organics is a prerequisite for testing mechanisms that impact their behavior and fate.  At LDEO, I have established an organic geochemistry laboratory from scratch with the ability to extract organic contaminants from environmental samples (waters, soils, sediments, aerosols) and biological samples (e.g., fish tissue and human exhaled breath condensate), to conduct purification and separation of organics of interest from the complex mixtures and matrices, and to identify and quantify those compounds using modern chromatography techniques. As I have built up these abilities at LDEO, I have continued my research in Environmental Geochemistry (e.g., source apportionment in the NY metropolitan area) and expanded into other areas, including tracing spilled oil in Gulf of Mexico, bioaccumulation and bioavailability of PAHs, bioremediation of contaminated soil/sediments, and the relationships between indoor and personal exposures to these contaminants and adverse respiratory outcomes related to the exposure among children living in NYC and Beijing, China. 

Education
Ph.D
Rensselaer Polytechnic Institute, Troy, NY
08/2004
M.S.
Nanjing University, China
06/1997
B.S.
Nanjing University, China
06/1994

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