Headshot of Aparajeo Chattopadhyay.

Aparajeo Chattopadhyay

Scientist, Ice Core and Atmospheric Chemistry Laboratory

PhD, Physical Chemistry, Indian Association for the Cultivation of Science (degree awarded by the University of Calcutta), India, 2018

Office Location
B03 Hutchison Hall
Web Address
Website

Research Overview

I am an atmospheric chemist and physical chemist with expertise in laboratory and field-based investigations of atmospheric chemical processes related to air quality and climate. My current research work at the 91×ÔÅÄÂÛ̳ involves global and regional atmospheric measurements of methane and its isotopologues, including both stable (13CH4, CH3D) and radioactive (14CH4) forms, to constrain its atmospheric budget. I also participate in measuring 14CO, a proxy for the OH radical, from a global atmospheric network as part of the project. I serve as the PI for an NSF-funded laboratory project on the . I also perform ice core measurements for understanding the past atmosphere.

Research Interests

  • Global methane (CH4) budget
  • Kinetic Isotope Effects (KIEs)
  • Hydroxyl (OH) radical abundance in the past and modern atmosphere

Selected Publications

  • D. Van Hoomissen, A. Chattopadhyay, S. A. Montzka, J. B. Burkholder*, , ACS Earth and Space Chemistry, 2025, 9, 589-602.
  • A. Chattopadhyay, V. C. Papadimitriou, J. B. Burkholder*, , International Journal of Chemical Kinetics, 2023, 55, 392-401.
  • A. Chattopadhyay, Y. Bedjanian, M.N. Romanias, A.D. Eleftheriou, V.S. Melissas, V.C. Papadimitriou, J. B. Burkholder*, , TheJournal of Physical Chemistry A, 2022, 126, 5407-5419.
  • A. Chattopadhyay, T. Gierczak, P. Marshall, V.C. Papadimitriou, J. B. Burkholder*, , Physical Chemistry Chemical Physics, 2021, 23, 4901-4911.
  • A. Chattopadhyay, V. C. Papadimitriou, P. Marshall, J. B. Burkholder*, International Journal of Chemical Kinetics, 2020, 52, 623-631.
  • A. Chattopadhyay*, M. Samanta, K. Mondal, T. Chakraborty*, Journal of Chemical Sciences, 2018, 130, 54.
  • A. Chattopadhyay*, P. Chatterjee, T. Chakraborty*, TheJournal of Physical Chemistry A, 2015, 119, 8146−8155.

For full publication record check ORCID:

Past Appointments

Research Scientist, NOAA Chemical Sciences Laboratory and CIRES, University of Colorado Boulder, Colorado, USA. 2018-2023

Research Grants

  • National Science Foundation (NSF). 2025-2028. Title: Kinetic Isotope Effects in Atmospheric Sinks of Methane. NSF Award# 2516797. PI: A. Chattopadhyay, co-PI: Prof. Vasilii Petrenko. Funding amount $732,679 (granted)
  • University of Colorado Boulder’s 2025 Research & Innovation Seed Grant program. 2025-2026. Title: Development of an Economical Tunable-Diode Laser Spectrometer for Fast Response Measurements of Methane in the Atmosphere. PI: Roy Lee Mauldin. Co-PIs: Emmanuel Assaf and A. Chattopadhyay (unfunded co-PI). Funding amount $57,006 (granted)

Awards

  • Researcher Development Grant, 2022, by the Royal Society of Chemistry, UK
  • Marie Skłodowska-Curie Actions (MSCA) Seal of Excellence, 2021, by the European Commission
  • Newton International Fellowship Award, 2018, by the Royal Society, UK, and SERB, India (declined)
  • International Travel Grant, 2016, from the SERB, Govt. of India
  • Best Poster Presentation Award at the National Symposium on Radiation and Photochemistry (NSRP) 2015 held at IIT Kanpur, India
  • Best Poster Presentation Award at the National Symposium on Radiation and Photochemistry (NSRP) 2013 held at NEHU, Shillong, India
  • CSIR - Junior Research Fellowship (JRF) 2011 through NET by CSIR, Govt. of India, for pursuing Ph.D. in Universities and Research Institutes in India

Professional Memberships

  • Member, American Geophysical Union, USA (AGU), 2019 - present
  • Member, Royal Society of Chemistry, UK (MRSC), 2020 - present
  • Associate Member, Royal Society of Chemistry, UK (AMRSC), 2016 - 2020