Sanat Kumar Das

Sanat Kumar Das
Assistant Professor

Download CV Extramural Funding:
  • Ramanujan Fellowship Research Grant by DST-SERB, Govt. of India on August 2018 (Completed)
  • Project to CSIR on “Physico-chemical factors influencing Aerosol Hygroscopicity during fog, its effect on Aerosol Radiative Properties and fog nowcasting: a study in the context of Regional Climate Change over Eastern India” (Ongoing)
  • Project to MOES regarding "Aerosol-Cloud-Precipitation interactions over tropical urban atmosphere in the Eastern India” (Under Review)
  • Project to INCOIS regarding Ocean-Atmosphere Interaction (Under Review)

Previous appointments:

  • DST-SERB Ramanujan Fellow at Environmental Sciences Section, Bose Institute, Kolkata, India : 2013-2018

  • Visiting Scientist at Department of Physics, University of New Brunswick, Canada : March 2014
  • Visiting Scientist, Disaster Prevention Research Institute, Kyoto University, Japan, during July-August 2014,sponsored by Ministry of Education, Culture, Sports, Science and Technology (MEXT)

  • Post Doctoral Fellow at Department of Atmospheric Sciences, National Taiwan University, Taiwan : 2011- 2013

  • Post Doctoral Fellow at National Atmospheric Research Laboratory, Gadanki, India : 2010 – 2011

  • Resident Scientist at Project Atmospheric Brown Cloud, UNEP Regional Resource Center for Asia and the Pacific (RRC.AP), Hanimaadhoo, Maldives : Feb 2010 – June 2010

  • Post Doctoral Fellow at Physical Research Laboratory, Ahmedabad, India : 2008 – 2010

    Extramural Funding:
    • Ramanujan Fellowship Research Grant by DST-SERB, Govt. of India on August 2018 (Completed)
    • Project to CSIR on “Physico-chemical factors influencing Aerosol Hygroscopicity during fog, its effect on Aerosol Radiative Properties and fog nowcasting: a study in the context of Regional Climate Change over Eastern India” (Ongoing)
    • Project to MOES regarding "Aerosol-Cloud-Precipitation interactions over tropical urban atmosphere in the Eastern India” (Under Review)
    • Project to INCOIS regarding Ocean-Atmosphere Interaction (Under Review)

Research interests:

My research activities are mainly based on ground-based and space-borne observations related to aerosol-radiation-cloud-precipitation interactions, implementation of novel methodologies and measurement techniques in different atmospheric conditions (field measurements), investigation of aerosols’ effects on environment and human society using different atmospheric coupling models. A research effort has been carried out to find a new method estimating water content of variety of precipitation events over complex terrain of Himalayas that are strongly influenced by mountain wind speed and atmospheric pressure. My another research activity over Antarctica identified raindrops instead of snow-flakes in the radar echoes, which could be due to radiative warming effect significantly contributed by long-range transported aerosols coming from other continental region. However, sensitivity tests are still going on in our lab. Recently we found another important result related to human health issues that winter-time fog over Indo-Gangetic Basin chokes movement of particulate matter within 2.5 micron (PM2.5) over Sundarban, venting out towards the Bay of Bengal, which indicates the deterioration of the quality of breathing air and increase of relative risk for respiratory problems and cardiac strokes over urban regions.   

Achievements:

  1.      Evaporation of raindrops over Antarctica: An Indication of warming effects as climate change
  2.      Low-Altitude rainfall occurring over Eastern Antarctica is a signature of global warming
  3.      Quantification of liquid water content using a new approach of analysis method of rain-drops size distribution for different types of precipitation over hill-top region of Eastern Himalayas
  4.      Winter-time haze worsening the air quality over urban regions of Indo-Gangetic Basin from ‘moderate’ to ‘very poor’ that aggravates human health risk factors




Contact:

Address: Environmental Science Section
Centenary Campus
Bose Institute
P-1/12 C.I.T. Scheme VII-M
Kolkata - 700054, India
E-Mail: sanat[at]jcbose.ac.in
Phone: +91-33-25693282

Research:


  1. Aerosol-induced Earth's Radiation Budget
  2. Simulation of Cloud Microphysical Processes
  3. Satellite Retrieval of Aerosol Parameters over the Himalayas
  4. Antarctic Aerosol effects on Polar Climate Change
  5. Role of Bio-Aerosols in Bio-Precipitation



Publications:


  1. A. Taori, Sanat Kumar Das, R. Goenka, B. Gharai, P. V. N. Rao, M. V. R. Seshasai, and J. Thakur. "Round-the-clock measurements of aerosol optical thickness over Antarctica made using a Dual Imager System during January-February 2017." Remote Sensing Letters 9, no. 11 (2018): 1089-1098.
  2. A. Roy, A. Chatterjee, C. Sarkar, Sanat Kumar Das, S. K. Ghosh, S. Raha, "A study on aerosol-cloud condensation nuclei (CCN) activation over eastern Himalaya in India", Atmospheric Research, Volume 189, 1 June 2017, Pages 69-81, ISSN 0169-8095.
  3. Sanat Kumar Das, A. Chatterjee, S. K. Ghosh, S. Raha, "An integrated campaign for investigation of winter-time continental haze over Indo-Gangetic Basin and its radiative effects", Science of The Total Environment,533, 15, 370-382, 2015.
  4. Sanat Kumar Das, A. Chatterjee, S. K. Ghosh, S. Raha, "Fog-Induced Changes in Optical and Physical Properties of Transported Aerosols over Sundarban, India",  Aerosol and Air Quality Research, 2015.
  5. Sanat Kumar Das, J. P. Chen, M. V. Ratnam and A. Jayaraman, “Investigation of radiative effects of the optically thick dust layer the Indian tropical region”, Ann. Geophys., 31, 647-663, 2013.
  6. Sanat Kumar Das and A. Jayaraman, “Long-range transportation of Anthropogenic Aerosols over Eastern Coastal Region of India: Investigation of Sources and Impact on Regional Climate Change”, Atmos. Res., 68-83, 2012.
  7. .Sanat Kumar Das and A. Jayaraman, “Role of Black Carbon in Aerosol Properties and Radiative Forcing over Western India during Premonsoon Period”, Atmos. Res., 102, 320-334, 2011.
  8. Sanat Kumar Das, A. Taori and A. Jayaraman, “On the role of dust storms in triggering atmospheric gravity waves observed in the middle atmosphere”,  Ann. Geophys., 29, 1647-1654, 2011.
  9. Sanat Kumar Das, D. P. Dhobal and N. Juyal, “Variability of Aerosol Optical Depth and recent recessional trend in Dokriani Glacier, Bhagirathi valley, Garhwal Himalaya”,  Curr. Sci., 99, 1816-1821, 2010.
  10. U. Das, H. S. S. Sinha, S. Sharma, H. Chandra, and Sanat Kumar Das, “Fine   Structure of the Low Latitude Mesospheric Turbulence”, J. Geophys. Res., 114, D10111, doi:10.1029/2008JD011307, 2009.
  11. Sanat Kumar Das, A. Jayaraman and A. Misra, “Fog induced variations in aerosol optical and physical properties over the Indo-Gangetic    Basin and impact to aerosol radiative forcing", Ann. Geophys., 26, 1345-1354, 2008
  12. S Ramachandran, R Rengarajan, A Jayaraman, M M Sarin, Sanat Kumar Das, “Aerosol radiative forcing during clear, hazy and foggy conditions over a continental polluted location in north India", J. Geophys. Res. 111. D20214, doi:10.1029/2006JD007142, 2006


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Recognition:

    Teaching:

    MSc.- Ph. D. SEM II : Electrodynamics II

    Ph. D. Course Work : Statistical Analysis and Atmospheric Physics

    Students:

    Image Name Designation Department Campus Contact number Email

    Former:


    Group News:

    • Ship-borne Experiment during 26 Jan -18 Feb, 2019 over the Arabian Sea on-board Sagar Sampada
    • Visit to the Darjeeling Lab of Bose Institute during 3-10 Jan 2019
    • Popular talk for school students on Warming Cryosphere :  Atmospheric Investigations over Antarctica on 20 Dec 2018
    • Brain-Storm Meeting at NARL, Gadanki during 19-20 Nov 2018
    • Invited talk in Air Pollution Extremes Workshop organised by the Columbia University, New York, USA during 30 Oct- 05 Nov 2018
    • Ship-bone Experiment during  27 June - 12 July 2018 over the Bay of Bengal on-board Sagar Manjusha