Sciences and Exploration Directorate

Mohar Chattopadhyay


Mohar Chattopadhyay's Contact Card & Information.
Phone: 301.614.6800
Org Code: 610.1
Mail Code 610.1
Greenbelt, MD 20771

Brief Bio

Mohar Chattopadhyay is an Atmospheric scientist with experience in model development, data assimilation, large-scale climate data analysis and climate variability. She is an experienced numerical modeler with work experience in New Zealand, Australia and USA. Mohar has worked with numerous modeling systems including UKMO’s UM, MM5/WRF and Australian Bureau of Meteorology (BoM) models GASP/LAPS and ACCESS model and 4DVAR data assimilation systems. She also has experience in CSIRO's Cubic Conformal Model (CCAM).  More recently, Mohar has worked at NOAA/NESDIS/STAR/JCSDA on Cloudy Radiance assimilation and Microwave Intergrated Retrieval Systems (MiRS). She obtained doctorate degree in Atmospheric Physics from the University of Canterbury, Christchurch, New Zealand in 2003.


Senior Research Scientist

Science Systems And Applications INC - NASA/GSFC, Greenbelt , MD 20771, USA

January 2016 - Present

  • Assimilation of reitrieved surface pressure from Orbitting Carbon Observatory 2 (OCO2) in GEOS5 modeling and assimilation system
  • Development and support of MERRA2/MERRA3 systems

Senior Staff Scientist

AER Inc. at NOAA/STAR/JCSDA - College Park, Maryland, USA

July 2014 - December 2015

  • Cloudy Radiance Data Assimilation
  • Microwave Integrated Retrieval System (MiRS)

Research Scientist

Commonwealth Scientific and Industrial Research Organization (CSIRO) - Aspendale, Victoria, Australia

August 2009 - June 2014

  • Tropical Cyclone Research based on large scale data analysis and regressions to build TC index for the South Pacific region
  • Regional Climate Modelling based on model simulations and analysis
  • Renewable energy assessment using high resolution Regional Climate Modelsimulation: model implementation, development and product for renewable energy assessment

Data Assimilation Scientist

Australian Bureau of Meteorology - Melbourne, Victoria, Australia

July 2005 - July 2009

  • 4D Var Data Assimilation in Bom’s ACCESS model: model development, 4DVar Data assimilation, pre-operational setup.
  • Development of a high resolution model for BoM’s wind energy forecasting system(MALAPS): model development, data assimilation and pre-operational testing

Mesoscale Modeller

Met. Service NZ - Wellington, NZ

January 2002 - December 2004


  • 2003 : PhD in Atmospheric Physics, University of Canterbury, Christchurch, NZ
  • 1997 : MSc in Physics, University Department of Chemical Technology, University of Mumbai, India
  • 1994 : BSc in Physics, University of Mumbai


  • World Meteorological Day 2010, Bureau Excellence Award presented to the members of ACCESS model development team
  • CSIRO Award for Science Excellence 2013: Award presented to the members of ACCESS model development team

Other Professional Information

  • Preer Reviwed Publications: 11
  • Technical Reports : 5
  • Conference Papers : 14
  • h-Index :4

Selected Publications


2014. "Simulating the climate of South Pacific islands using a high resolution model ." International Journal of Climatology 35 (6): 1157-1171 [Journal Article/Letter]

2013. "Implementation of the initial ACCESS numerical weather prediction system." Aust. Meteorol. Oceanogr. Journal 63 265:284 [Journal Article/Letter]

2012. "On the variability of projected tropical cyclone genesis in GCM ensembles." Tellus 64 [DOI: 10.3402/tellusa.v64i0.18696] [Journal Article/Letter]

2010. "Preliminary results from Numerical Weather Prediction implementation of ACCESS." CAWCR Research Letters 5 15:22 [Journal Article/Letter]