Isotope and trace elements geochemistry. Continental erosion and weathering. Enhanced silicate rock weathering and CO2 removal from the atmosphere. The evolution of ocean chemistry in response to global events. Modern and past anthropogenic activity in river, lake and estuary settings. Petrogenic carbon oxidation in river catchments and implications for the carbon cycle. Estuarine cycling of isotopes, trace elements and nutrients.

1. Ph. D. (Geology), Physical Research Laboratory (M S University, Baroda), 2003
2. M Tech. with Honors (Applied Geology), University of Roorkee, 1996
3. B Sc. with Honors (Geology), Ravenshaw College (Utkal University), 1993

1. Professor, IISER Kolkata (current)
2. Associate Professor, IISER Kolkata (2010 - 2024)
3. Assistant Professor, IIT Kharagpur (2007 - 2010)
4. Visiting Faculty, IIT Kharagpur (2006 - 2007)
5. Scientist Fellow, National Institute of Oceanography, Goa (2005 - 2006)
6. Post Doctoral Fellow, University of Hawaii, Honolulu (2004 - 2005)
7. Post Doctoral Fellow, Ocean Research Institute, Tokyo (2002 - 2004)

1. National Member of ISC Affilated Scientific Committee on Ocean Research (SCOR) 2024-2026 from INSA (2024)
2. JSPS Invitation Fellowship from JSPS Japan (2023)
3. Member of Research Advisory Committee from Birbal Sahni Institute of Palaeosciences, Department of Science and Technology (2018)
4. Mary Sears Visitor Award from Woods Hole Oceanographic Institution (2018)
5. JSPS Invitation Fellowship from JSPS (2009)
6. Associate Editor, Geochemical Journal, 2009-2011 from Geochemical Society of Japan (2009)
7. INSA Young Scientist in Earth Sciences from Indian National Science Academy (2005)
8. JSPS Post Doctoral Fellowship from JSPS (2002)

List of Publications: