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.

Alexandra Bausch
Personal Information
Alexandra
Bausch
Graduate Research Fellow
Earth and Environmental Sciences
Biology and Paleo Environment
Contact Information
102D Geoscience
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8178

Fax: 

(845) 365-8150

Fields of interest: 

Biological Oceanography, Chemical Oceanography, Biogeochemistry, Marine Biology

My interdisciplinary graduate research project addresses the impacts of regional climate change on planktonic microorganisms in coastal marine ecosystems. Using integrated laboratory experiments and field studies, I examine the coupled biological and chemical changes in marine ecosystems as a result of increased anthropogenic climate change. Much of my research focuses on the interactive effects of ocean acidification and other chemical stressors on the growth and physiology of planktonic organisms. I also measure dissolved thorium isotopes in seawater to determine fluxes of atmospheric dust – a major source of iron for phytoplankton – in surface waters of the Indian Ocean.

Education
M.Phil. Earth and Environmental Sciences
Columbia University
10/2015
M.S. Environmental Engineering Technology
University of Stavanger
06/2011
B.S. Chemistry
Villanova University
05/2009
Xiaomeng Jin
Personal Information
Xiaomeng
Jin
Graduate Student
Earth and Environmental Sciences
Ocean and Climate Physics
Contact Information
207E Oceanography
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US

Fax: 

(845) 365-8157
Rosanne D'Arrigo
Personal Information
Rosanne
D'Arrigo
Lamont Research Professor
Lamont-Doherty Earth Observatory
Biology and Paleo Environment
Associate Director - Biology and Paleo Environment
Lamont-Doherty Earth Observatory
Contact Information
Tree Ring Lab
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8617

Fax: 

(845) 365-8150
Education
PhD
Columbia University
06/01/1989
Brendan M. Buckley
Personal Information
Brendan
M.
Buckley
Lamont Research Professor
Lamont-Doherty Earth Observatory
Biology and Paleo Environment
Contact Information
Tree Ring Lab
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8782

Fax: 

(845) 365-8150

Fields of interest: 

Dendrochronology, Dendroclimatology, Tropical Forest Ecosystems, Arctic Treeline Studies
  • I have spent the past several years focused on dendrochronology in the Asian tropics, particularly mainland Southeast Asia.  This work resulted in two long records from north Thailand and north Vietnam, respectively, that appear in Buckley et al. (2007 Climate Dynamics), and Sano, Buckley and Sweda (2009, also in Climate Dynamics) showing that periods of decadal drought occurred during the past 5 centuries and often coincided with societal turmoil.  Most recently, we developed a near-millennial aged tree ring chronology from southern Vietnam, at 12 degrees north latitude, from the rare cypress Fokienia hodginsii.  This record was used to reconstruct the hydroclimate for the region going back 750 years, and highlighted periods of multi-decadal drought that coincided with the collapse of Angkor (These results are now published as Buckley et al. 2010, in the Proceedings of the National Academy of Sciences).  Furthermore, we show the links between sea surface temperature variability (i.e., ENSO) in the tropical Pacific and hydroclimate over mainland Southeast Asia.  During the course of this research I have found multiple tree species from the mountains of Vietnam and Laos that have annual rings and can be used for developing records similar to that for Fokienia.  This work is ongoing, and ought to make significant contribution to the fields of paleoclimatology and tropical forest ecology.  
  • Prior to the work in Southeast Asia I spent years working along the northern treeline in Alaska and Canada, working largely on reconstructing temperature.  I also spent years in the southern hemisphere, studying the long-lived souther conifer Huon pine, of the family Podocarpaceae, as well as New Zealand's ancient Kauri, of the family Auracauriaceae.  In all of these studies I like to look at tree rings as incorporating multiple aspects of the environment, and taking into account the physiology and ecological aspects of how trees grow.  I am currently focused on understanding in far greater detail the physiological and ecological aspects of tree growth in response to climate.  There is much exciting work yet to be done, and along with my colleagues from around the world, I plan to be addressing these important questions for a long time to come.  
Education
Ph.D.
Institute of Antarctic and Southern Ocean Studies, University of Tasmania, Hobart Australia
1997
M.A.
Dept. of Geography, Arizona State University
1989
B.S.
Dept. of Geography, Plymouth State College, New Hampshire
1986
Selected Publications:
High-resolution palaeoclimatology of the last millennium: a review of current status and future prospects, Jones, P. D.; Briffa, K. R.; Osborn, T. J.; Lough, J. M.; van Ommen, T. D.; Vinther, B. M.; Lutherbacher, J.; Wahl, E. R.; Zwiers, F. W.; Mann, M. E.; Schmidt, G. A.; Ammann, C. M.; Buckley, B. M.; Cobb, K. M.; Esper, J.; Goosse, H.; Graham, N.; Jansen, E Holocene Feb, Volume: 19, Issue: 1 p.: 3-49 (2009) Doi 10.1177/0959683608098952
Tree-ring based hydroclimate reconstruction over northern Vietnam from Fokienia hodginsii: eighteenth century mega-drought and tropical Pacific influence, Sano, M.; Buckley, B. M.; Sweda, T. Climate Dynamics Aug, Volume: 33, Issue: 2-3 p.: 331-340 (2009) DOI 10.1007/s00382-008-0454-y
Analyses of growth rings of Pinus merkusii from Lao PDR, Buckley, B. M.; Duangsathaporn, K.; Palakit, K.; Butler, S.; Syhapanya, V.; Xaybouangeun, N. Forest Ecology and Management Dec 15, Volume: 253, Issue: 1-3 p.: 120-127 (2007) DOI 10.1016/j.foreco.2007.07.018
Arsenic in tree rings at a highly contaminated site, Cheng, Z. Q.; Buckley, B. M.; Katz, B.; Wright, W.; Bailey, R.; Smith, K. T.; Li, J. B.; Curtis, A.; van Geen, A. Science of the Total Environment Apr 15, Volume: 376, Issue: 1-3 p.: 324-334 (2007) DOI 10.1016/j.scitotenv.2007.01.074
Decadal scale droughts over northwestern Thailand over the past 448 years: links to the tropical Pacific and Indian Ocean sectors, Buckley, B. M.; Palakit, K.; Duangsathaporn, K.; Sanguantham, P.; Prasomsin, P. Climate Dynamics Jul, Volume: 29, Issue: 1 p.: 63-71 (2007) DOI 10.1007/s00382-007-0225-1
Millennia-long tree-ring records from Tasmania and New Zealand: a basis for modelling climate variability and forcing, past, present and future, Cook, E. R.; Buckley, B. M.; Palmer, J. G.; Fenwick, P.; Peterson, M. J.; Boswijk, G.; Fowler, A. Journal of Quaternary Science Oct, Volume: 21, Issue: 7 p.: 689-699 (2006) Doi 10.1002/Jqs.1071
Global surface temperature signals in pine ring-width chronologies from southern monsoon Asia, Buckley, B. M.; Cook, B. I.; Bhattacharyya, A.; Dukpa, D.; Chaudhary, V. Geophysical Research Letters Oct 19, Volume: 32, Issue: 20 p.: - (2005) Doi 10.1029/2005gl023745
Inferred summer precipitation for southern Ontario back to AD 610, as reconstructed from ring widths of Thuja occidentalis, Buckley, B. M.; Wilson, R. J. S.; Kelly, P. E.; Larson, D. W.; Cook, E. R. Canadian Journal of Forest Research-Revue Canadienne De Recherche Forestiere Dec, Volume: 34, Issue: 12 p.: 2541-2553 (2004) Doi 10.1139/X04-129
Interannual to multidecadal modes of Labrador climate variability inferred from tree rings, D'Arrigo, R.; Buckley, B.; Kaplan, S.; Woollett, J. Climate Dynamics Jan, Volume: 20, Issue: 2-3 p.: 219-228 (2003) DOI 10.1007/s00382-002-0275-3
A changing temperature response with elevation for Lagarostrobos franklinii in Tasmania, Australia, Buckley, B. M.; Cook, E. R.; Peterson, M. J.; Barbetti, M. Climatic Change Jul-Aug, Volume: 36, Issue: 3-4 p.: 477-498 (1997)