Former Group Members

Former Ph.D. Students

Xuyuan "Ellen" Ai
Ph.D., 2023
On the Role of the Southern Ocean in the Glacial-Interglacial Cycles of the Past 460,000 Years: Changes in Wind-Driven Upwelling and Ocean Front Position Revealed by Reconstructed Surface Ocean Nutrient Conditions and Temperatures"
Last known address: Max Planck Institute, Mainz, Germany.

Victoria Hoi-Yee Luu
Ph.D., 2021
"Modern-ocean ground-truthing of nitrogen isotopes in scleractinian corals: A proxy for surface nutrient conditions"
Last known address: Marine Resource Management Specialist,  NOAA's Northeast Fisheries Science Center, Woods Hole, MA.

Emma Kast
Ph.D., 2020

"Development and application of biogenic mineral-bound nitrogen isotope measurements to the million-year timescale"
Last known address: Research Fellow,  Department of Earth Science, University of Cambridge, UK

Dario Marconi
Ph.D., 2017

"Use of the Nitrate Isotopes in the Ocean Interior to Explore the Isotop8c Composition of Sinking Nitrogen and its Implications for Marine Biogeochemical Cycles"
Last known address: Department of Geosciences, Princeton University

Xingchen "Tony" Wang
(Former Student and Postdoctoral Fellow 2016)
Ph.D., 2016

"Nitrogen Isotopes in Scleractinian Corals: Modern Ocean Studies and Paleoceanographic Applications"
Last known address: Assistant Professor, Earth and Environmental Sciences, Boston College, MA

Kristen Karsh
Ph.D., 2013

Physiological and Environmental Controls on the Nitrogen and Oxygen Isotope
Fractionation of Nitrate During Its Assimilation by Marine Phytoplankton”

Last known address: Antarctic Climate and Ecosystems CRC, University of Tasmania,  Australia

Mathis Hain
(Former Student and NERC Independent Research Fellow)
Ph.D., 2013

 “Glacial/Interglacial and Deglacial Changes in Ocean Circulation and their Consequences for the Global Carbon Cycle: A Model Study”
Last known address: Assistant Professor, Earth and Planetary Sciences, University of California, Santa Cruz, CA

DiFiore, Peter
Ph.D., 2010

"Nitrate Isotope Dynamics in the Southern Ocean"
Last known address: Managing Director, Cartesian Re, New York, NY

Haojia (Abby) Ren, 
Ph.D., 2010

"Development and Paleoceanographic Application of Planktonic Foraminifera bound Nitrogen Isotopes"
Last known address: Assistant Professor, Department of Geosciences, Taiwan National University, Taipai, TW

Brigitte G. Brunelle
Ph.D, 2009

"Nitrogen Isotope Contraints on the Biogeochemistry and Paleoclimatology of The Subarctic North Pacific"
Last known address: Project Scientist, Department of Defense, Washington, DC

Angela Noel Knapp
Ph.D, 2006

"The Stable Isotopic Composition of Dissolved Organic Nitrogen and Nitrate in the Subtropical Ocean"
Last known address: Assistant Professor, Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL

Meredith Hastings-Galanter
Ph.D, 2004

"Studies of Reactive Nitrogen in the Atmosphere Using Global Modeling and Stable Isotope Measurements"
Last known address: Associate Professor of Geological Sciences, Brown University, Providence, RI



Visitors and Former Group Members


Jesse Farmer
Postdoctoral Research Fellow

Assistant Professor of Coastal Geology, School for the Environment, U Mass. Boston

Alexandra Auderset
Visiting Postdoctoral Research Fellow

University of Southhampton

Wentao Wang
Former Visiting Fellow

Chinese Academy of Sciences

Yuwei "Cindy" Wang
Former Visiting Research Collaborator

Boston College

Alexa Weigand
Former Lab Manager

Julien Foriel
Former Lab Manager
Harvard University

Run Zhang
Former Visiting Scientist

Xiamen University

Preston Cosslett Kemeny
Former Research Associate

California Institute of Technology

Patrick Rafter
Former Research Scholar

University of California, Irvine

Sebastian Kopf
Postdoctoral fellow, 2015-2016

University of Colorado, Boulder.

Sarah Fawcett
Postdoctoral Research Associate, 2012-2015

University of Capetown, South Africa

Anja Studer
Postdoctoral Research Associate, 2015
Max Planck Institute for Chemistry, Mainz, Germany

François Fripiat
Postdoctoral Research Associate, 9/11-8/13

Université Libre de Bruxelles, Brussels, Belgium

Katye Altieri
Postdoctoral Research Associate, 9/09-7/13

University of Capetown, South Africa

Kritee K.
Postdoctoral Research Associate, 7/08 – 9/10

High Meadows Scientist, Environmental Defense Fund

Julie Granger
Postdoctoral Research Associate, 5/07 – 8/11

University of Connecticut, Groton, CT

Maria Prokopenko
Postdoctoral Research Associate, 1/05 – 8/07

Pomona College, Claremont, CA

Agatha de Boer
Postdoctoral Research Associate, 5/03 – 12/05; co-advised by Robbie Toggweiler of GFDL

Stockholm University

Moritz Lehmann
Postdoctoral Research Associate, 5/02 – 5/04

University of Basel, Switzerland

Rebecca Robinson Graham
Postdoctoral Research Associate, 9/01 – 8/05

University of Rhode Island, RI