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Dr. Sumit Chakraborty

Staff Scientist

Phytoplankton Ecology Program

Today's Research for Tomorrow's Oceans


Sumit joined the Mote Phytoplankton Ecology group in February 2018. Sumit is interested in fine scale phytoplankton dynamics and the role of phytoplankton in the ocean carbon cycle and quantitative understanding of the perturbations by climate change and human activities on phytoplankton dynamics in the coastal oceans. He takes an interdisciplinary approach in his research, using a combination of bio-optics, remote sensing, HPLC pigment analysis, phytoplankton cell counts, statistical modeling, and laboratory- based experiments.

At Mote, Sumit is working on multi-station time series of phytoplankton data in the West Florida shelf to study the time-varying changes in phytoplankton community (inter-group/inter-functional types variability). He is also involved in designing laboratory experiments to address specific question on Karenia brevis physiology and trophic level interactions.


Ph.D, Marine Science (Biological Oceanography), University of Southern Mississippi, 2013

M.Sc, Marine Science, University of Calcutta, Kolkata, India, 2005

B.Sc. Botany (Honors), University of Calcutta, Kolkata, India, 2003

Mote Scholarly and Service Award, 2023-present
Associate Editor and Topical Advisory Panel Board Member, Water (MDPI), 2021-present
A RAPID response to Hurricane Harvey’s impacts on coastal carbon cycle, metabolic balance and ocean acidification-NSF Rapid Response, Fall-2017. Co-Investigator Sumit Chakraborty, Steven Lohrenz (Principal Investigator)
Student Travel Award ASLO summer meeting, Santa Fe, NM, 2010
Student Travel Award Ocean Optics XX, Anchorage, AK, 2010

Additional Publications

Verma, N, S.E. Lohrenz, S. Chakraborty, C.G. Fichot (2021). Underway hyperspectral bio-optical assessments of phytoplankton size classes in the river-influenced northern Gulf of Mexico. Remote Sensing. 2021, 13, 3346.

Quigg, A., M. Parsons, S. Bargu; K. Ozhan; K. Daly; S. Chakraborty; M. Kamalanathan, D. Erdner; S. Cosgrove; E. Buskey. (2021). Marine phytoplankton responses to oil and dispersant exposures: Knowledge gained since Deepwater Horizon oil spill. Marine Pollution Bulletin., Volume164,

Gary Hitchcock, Sumit Chakraborty and Kendra Daly. Introduction to biological oceanography of Gulf of Mexico (2019). In Bianchi (Eds) Book: GULF OF MEXICO ORIGIN, WATERS, AND BIOTA: Chemical Oceanography of Gulf of Mexico. Texas A & M University Press. ISBN: 978-162349-774-3

Lohrenz, S.E., W.J. Cai, S. Chakraborty, R. He, and H. Tian. 2019. Ocean Surface pCO2 and Air-Sea CO2 Flux in the Northern Gulf of Mexico, 2006-2010. ORNL DAAC, Oak Ridge, Tennessee, USA.

Lohrenz, S. E., W.-J. Cai, S. Chakraborty, W.-J. Huang, X. Guo, R. He, Z. Xue, K. Fennel, S. Howden, and H. Tian, 2018. Satellite estimation of coastal pCO2 and air-sea flux of carbon dioxide in the northern Gulf of Mexico. Remote Sensing of the Environment,

Chakraborty, S, S. E. Lohrenz and K. Gundersen, 2017. Photophysiological and light absorption properties of phytoplankton communities in the river-dominated margin of the northern Gulf of Mexico. Journal of Geophysical Research-Oceans. 122, 4922-4938, doi: 10.1002/2016JC012092

Huang, W. -J, W. -J Cai, Y. Wang, X. Hu, B. Chen, R. He, S. Chakraborty, S. E. Lohrenz, C. S. Hopkinson, 2015. The response of inorganic carbon distribution and dynamics to upwelling-favorable winds on the northern Gulf of Mexico during summer, Continental Shelf Research, 111, 211-222, doi: 10.1016/j.csr.2015.08.020.

Salisbury, J., D. Vandemark, B. Jönsson, W. Balch, S. Chakraborty, S. Lohrenz, B. Chapron, B. Hales, A. Mannino, J.T. Mathis, N. Reul, S.R. Signorini, R. Wanninkhof, and K.K. Yates, 2015. How can present and future satellite missions support scientific studies that address ocean acidification? Oceanography 28(2):108–21,

Chakraborty, S, and S. E. Lohrenz, 2015. Phytoplankton community structure in the river-influenced continental margin of the northern Gulf of Mexico. Marine Ecology Progress Series. 251, 31-47. doi: 10.3354/meps11107.

S. Lohrenz, S. Chakraborty, M. Huettel, J. Herrera Silveira, K. Gundersen, D.
Redalje, J. Wiggert, B. E. Denton, J. Lehrter. Primary production. In:Benway, H. M., Coble, P.G. (Editors), 2014. Report of The U.S. Gulf of Mexico Carbon Cycle Synthesis, March 27-28, 2013, Ocean Carbon and Biogeochemistry Program and North American Carbon Program, pp. 24-27.

Lohrenz, S. E., W-J Cai, S. Chakraborty, K. Gundersen, and M. C. Murrell. Nutrient and carbon dynamics in a large river-dominated coastal ecosystem: the Mississippi-Atchafalaya river system (2013). In Bianchi et al (Eds) Book: Biogeochemical Dynamics at Large River-Coastal Interfaces: Linkages with Global Climate Change. Cambridge University Press. ISBN: 9781139136853.

Chakraborty, S. 2013. Phytoplankton community distribution and light absorption properties in the northern Gulf of Mexico. University of Southern Mississippi.

Hooker, S.B., L. Clementson, C.S. Thomas, L. Schlüter, M. Allerup, J. Ras, H. Claustre, C. Normandeau, J. Cullen, M. Kienast, W. Kozlowski, M. Vernet, S. Chakraborty, S. Lohrenz, M. Tuel, D. Redalje, P. Cartaxana, C.R. Mendes, V. Brotas, S.G.P. Matondkar, S.G. Parab, A. Neeley, and E.S. Egeland, 2012: The Fifth SeaWiFS HPLC Analysis Round-Robin Experiment (SeaHARRE-5). NASA Tech. Memo. 2012, NASA Goddard Space Flight Center, Greenbelt, Maryland, 101 pp.

Chatterjee. M, E V Silva Filho, S K Sarkar, S M Sella, A Bhattacharya, K K Satpathy, M V R Prasad, S. Chakraborty, B D Bhattacharya, 2007. Distribution and possible source of trace elements in the sediment cores of a tropical macrotidal estuary and their ecotoxicological significance. Environment International. 33, 346-346. doi: 10.1016/j.envint.2006.11.013.