Dr. Someshwar Das

EDUCATION:

         Ph.D.      Atmospheric Science, Indian Institute of Technology, Delhi.
         M.Sc.      Meteorology, Andhra University, Waltair, India.
         B.Sc.       Meteorology, Tribhuvan University, Kathmandu, Nepal.

RESEARCH INTERESTS:

• Atmospheric Convection, Cumulus Parameterization
• Modeling of Clouds and Precipitation, Mesoscale & Cloud Scale Modeling
• General Circulation & Climate modeling, Weather Forecasting.

RESEARCH PUBLICATIONS:                                                                       

The Abstract of all the papers listed here are available on-line through Internet
http://www.angelfire.com/sd/somesh/allpub.html

(a)        Papers published in Journals / Refereed Books :

Islam, M.N., Someshwar Das and H. Uyeda, 2009: Calibration of TRMM derived rainfall over Nepal during 1998-2007. The Open Atmospheric Science Journal, Vol. 3, 230-241.

Dutta, S. K., Someshwar Das, S.C. Kar, U.C.Mohanty and P.C. Joshi, 2009: Impact of Vegetation on the Simulation of Seasonal Monsoon Rainfall over the Indian Subcontinent using a Regional Model. Jour. of Earth System Sciences, Vol. 118, No. 5, 413-440.

Dutta, S. K., Someshwar Das, S.C. Kar, U.C.Mohanty and P.C. Joshi, 2009: Impact of Downscaling on the Simulation of Seasonal Monsoon Rainfall over the Indian Region using a Global and Mesoscale Model. The Open Atmospheric Science Journal, Vol. 3, 79-98.

Das Someshwar, R. Ashrit, S. Mohandas, G. R. Iyengar, M. Das Gupta, J. P. George, E. N. Rajagopal and S. K. Dutta, 2008: Skills of different Mesoscale Models over Indian region during Monsoon season: Forecast Errors. Jour. of Earth System Sciences, Vol. 117, 603-620.

Abhilash, S., K. Mohankumar and Someshwar Das, 2008: Simulation of microphysical structure associated with tropical cloud clusters using mesoscale model and comparison with TRMM observations. International Journal of Remote Sensing (IJRS), Vol. 29, No. 8, 2411-2432.

Das, Someshwar, R. Ashrit, Mitchell W. Moncrieff, M. Dasgupta, J. Dudhia, C. Liu and S. R. Kalsi, 2007: Simulation of Intense Organized Convective Precipitation Observed during the Arabian Sea Monsoon Experiment (ARMEX), J. Geophys. Res., 112, D20117, doi:10.1029/2006JD007627.

Das Gupta, M, P. K. Pradhan, Someshwar Das and U.C. Mohanty, 2007: Simulation of rain-bearing summer monsoon systems along the west coast of India by use of ARMEX re-analysis. Natural Hazards, Vol. 42, 379-390.

Abhilash, S., Someshwar Das, K. Mohankumar, S. R. Kalsi, M. Das Gupta, , John P. George, S. K. Banerjee, S. B. Thampi, and D. Pradhan, 2007: Assimilation of Doppler Weather Radar observations in a Mesoscale model for the Prediction of Intense Rainfall Events Associated with Mesoscale Convective Systems using 3DVAR: Journal of Earth System Science, Vol. 116, No. 3, 275-304.

Abhilash, S., Someshwar Das, S. R. Kalsi, M. Das Gupta, K. Mohankumar, John P. George, S. K. Banerjee, S. B. Thampi, and D. Pradhan, 2007: Impact of Doppler radar wind in simulating the intensity and propagation of rain bands associated with mesoscale convective complexes
using MM5-3DVAR system. Pure & Applied Geophysics (PAGEOPH), Vol. 164, No. 8-9, 1491-1509.

Das, Someshwar, R. Ashrit, and M. W. Moncrieff, 2006: Simulation of a Himalayan Cloudburst Event. Journal of Earth System Science, Vol. 115, No. 3, 299-313.
        
Srinivas, C. V., R. Venkatesan, N. V. Muralidharan, Someshwar Das, Hari Dass and P. Eswara Kumar, 2006: Operational Mesoscale Atmospheric Dispersion Prediction using Parallel Computing Cluster. J. Earth Syst.  Sci., Vol. 115, No. 3, 315-332.

Das Someshwar, 2005: Mountain weather forecasting using MM5 modeling system. Current Science, Vol. 88, No. 6, PP 899-905.

Das Gupta, M, Someshwar Das, K. Prasanthi, P.K. Pradhan and U.C. Mohanty, 2005: Validation of upper-air observations taken during the ARMEX-I and its impact on the global analysis-forecast system. Mausam, Vol. 56,  pp 139-146.

Mohanty, U.C., N.V. Sam, Someshwar Das, and S. Basu, 2005: A study on the convective structure of the atmosphere over the west coast of India during ARMEX-I. Mausam, Vol 56., pp 49-58.

Das Someshwar, A.S.K.A.V. Prasad Rao, U. C. Mohanty, A. K. Mitra, D. Rajan, 2004: Study of Cloud Liquid Water Path and Total Precipitable Water Content From IRS-P4/MSMR and Numerical Weather Prediction Model Output.  Journal of Indian Society of Remote Sensing, Vol. 32, No. 2, pp 175-184.

Das, Someshwar, S.V. Singh, E.N. Rajagopal and R. Gall, 2003: Mesoscale modeling for mountain weather forecasting over the Himalayas. Bulletin of the American Meteorological Society, Vol. 84, no. 9, pp 1237-1244.

 Das, A.K., U.C. Mohanty, Someshwar Das, M. Mandal and S.R. Kalsi, 2003: Circulation characteristics of a monsoon depression during BOBMEX-99 using high resolution analysis. Journal of Earth & Planetary Sciences (Proc. Indian Acad. Sci.), 112, No.2, pp 165-184

Mohanty, U.C., N.V. Sam, Someshwar Das, A.N.V. Satyanarayana, 2003: A study on the structure of convective atmosphere over the Bay of Bengal during BOBMEX-99. Journal of Earth & Planetary Sciences (Proc. Indian Acad. Sci.), 112, No.2,147-163.

Das Someshwar, A.K. Mitra, G. R. Iyengar and Jagvir Singh, 2002: Skill of Medium Range Forecasts over The Indian Monsoon region Using Different Parameterizations Of Deep Convection.. Weather and Forecasting, Vol. 17, No. 6, pp 1194-1210.

Saseendran S.A., S. V. Singh, L.S. Rathore and Someshwar Das, 2002: Characterization of weekly cumulative rainfall forecasts over meteorological sub-divisions of India using a GCM. Weather and Forecasting, Vol. 17, No. 4, pp 832-844

Das Someshwar, 2002: Mesoscale and cloud-resolving scale simulation of a Heavy precipitation episode and associated cloud system using MM5 model. In Weather and Climate modeling, Eds. Singh et al., New Age Intl. Ltd. Publishers, New Delhi, 106-117.
        
         Das Someshwar, A.K. Mitra, G. Iyengar and S. Mohandas, 2001:  Comprehensive Test Of Different Cumulus Parameterization Schemes For The Simulation Of The Indian Summer Monsoon. J. of Meteor. & Atmos. Physics, Vol. 78, No.3-4, pp 227-244.

Patra A.K., Someshwar Das, J.P. George, R,K, Paliwal and A.P. Mitra, 2001: Study of the variability of convective heating and moistening using Simplified Arakawa-Schubert convection scheme during INDOEX IFP-99. Current Science (Indian Journal), Vol. 80, No. 10 (supplement), PP 25-29.

Das Someshwar, D. Johnson and Wei-Kuo Tao, 1999: Single-Column and Cloud Ensemble Model simulations of TOGA-COARE convective systems. J.  Meteor. Soc.of Japan, Vol. 77, No. 4, PP 803-826.

Das Someshwar, 1999: Suggested observational network for simulation of cloud processes during the Indian Ocean Experiment (INDOEX).  Current Science (Indian Journal),Vol . 76, No. 7 PP 912-915.

Das Someshwar, Y.C. Sud and M.J. Suarez, 1998: Inclusion of a prognostic cloud scheme with the Relaxed Arakawa-Schubert cumulus parameterization; Single Column model studies. Quart. Jour. of Roy Met. Soc., Vol. 124, PP 2671-2692.

Das Someshwar, 1999: Representation of subgrid scale orography and clouds in the context of the Himalayas. The Himalayan Environment, PP 156-163, S.K. Dash and J. Bahadur, Edt., New Age International (P) Ltd. Publishers, New Delhi.

 Das Someshwar, 1996:  Study of convective heating rates generated at different resolutions with special reference to a depression over the Bay of Bengal. Advances in Tropical Meteorology, PP  92-102, R.K. Datta, Edt., Concept publishing Co., New Delhi.

Das Someshwar, K. Veeraraghavan, Z.N. Begum and Swati Basu, 1993: Evaluation of monsoon - 91 forecasts by  R40 model. Advances in Tropical Meteorology, PP  500-512, R.N. Keshavamurti and P.C. Joshi, Eds., Tata McGraw-Hill publishing Co.,  New Delhi.

Das Someshwar, A.K. Bohra, L.Harenduprakash , A.K. Mitra and G. Iyengar, 1992: Onset of monsoon-1990: Impact of cumulus parameterization. Physical Processes in Atmospheric Models, D.R. Sikka and S.S. Singh, Eds, PP 19-31, Wiley Eastern Limited, New Delhi.

 Das Someshwar, 1990:  Impact of lateral detrainment and downdraft on the summer monsoon cloud clusters.  Mausam (Indian Journal of Meteorology), Vol. 41, No.2, PP 227-233.

Das Someshwar, U.C. Mohanty and O.P. Sharma, 1988:  Study of Kuo-type cumulus parameterization during different epochs of the Asian summer monsoon. Mon. Wea. Rev., Vol. 116, No. 3, PP 715-729.

Das Someshwar, U.C. Mohanty and O.P. Sharma, 1987:  Semiprognostic test of the Arakawa-Schubert cumulus parameterization during different phases of the summer monsoon. Contrib. Atmos. Phys., Vol. 60, No. 2, PP 255-275.

Mohanty U.C., and Someshwar Das, 1986:  On the structure of the atmosphere during suppressed and disturbed periods of convection over the Bay of Bengal. Procd. Ind. Natn. Sci. Acad., 52, A, 3  PP 625-640.

(b)        Papers Presented/Accepted in Seminars / Symposia (Last 5 years):

 Das Someshwar, 2009: A Coordinated Field Experiment on Thunderstorms over the SAARC Region, and Mitigation of Disasters related to Hazardous Weather in South Asia. Intl. Conf. on Radar & Modeling studies of the Atmosphere” held during 10-13 November 2009, Kyoto University, Japan.

Das Someshwar, B.R.S.B. Basnayake, M.K. Das, M.A.R. Akand, M.M. Rahman, M.A. Sarker and M.N. Islam, 2009: Characteristics of Nor'westers observed by TRMM and Simulated by WRF Model. 6th AOGS Conf. organized by Asia Oceania Geoscience Society, 11-15 August 2009, Singapore.

Das Someshwar, 2009: Simulation of intense organized convective precipitation over the west coast of India due to interaction between Westerly and Easterly Troughs. SAARC seminar on Interaction between Westerly & Easterly Troughs and their impact on the weather over the SAARC region, 8-9 June 2009, Islamabad, Pakistan.

Das Someshwar and U.C. Mohanty 2008: Coordinated Field Experiment on Severe Thunderstorm Observation and Regional Modeling over the SAARC Region. SAARC seminar onNor'wester and Tornadoes over the SAARC Region and their Forecasting Preparedness, 20-21 August 2008, SMRC, Dhaka, Bangladesh.

Das Someshwar, 2008: Modeling and Variability of the Indian summer monsoon. SAARC seminar on Monsoon Variability & Hydrological Prepardness over the SAARC region”, 27-28 March 2008, Kathmandu, Nepal.

Das Someshwar, 2007: Estimation of Cloud Microphysical Properties & Potential areas of Rain Enhancement using Cloud-Resolving scale Model. Brainstorming meeting on “Cloud Microphysical Processes and Potential of Rain Enhancement in the Seeded Clouds", Indian institute of Tropical Meteorology, Pune, 20th February 2007

Das Someshwar, S.K. Dutta, R. P. Shivhare and A. Tyagi, 2007: Fog Forecasting using Mesoscale Model. Brain storming meeting on forecast of Monsoon at National, Regional and State Levels organized by Ministry of Earth Sciences, New Delhi, 6-8 February 2007

Das Someshwar, 2007: Mesoscale Modelling of Thunderstorm/ Cloudburst & Associated Microphysics. National Workshop on Mesoscale Modeling of Atmospheric Processes,AndhraUniversity, Waltair 29-31 January 2007.

Das Someshwar, S. Abhilash and M. Das Gupta, 2006: Simulation of Nor’westers using Doppler Weather Radar Wind Observations in a Mesoscale Model. Intl. Asia-Pacific Conference on Remote Sensing and Modeling of the Atmosphere, Oceans, and Interactions, SPIE, 13-17 Nov 2006, Goa, India.

Das Someshwar, S. Abhilash, M. Dasgupta, J. P. George, and S. R. Kalsi, S.K. Banerjee, S.B. Thampi, D. Pradhan and K. Mohan Kumar, 2006: Assimilation of Doppler Weather Radar wind data on simulating the organization and intensity of mesoscale convective complexes using MM5-3DVAR system. International Conference on mesoscale processes in atmosphere, ocean and environmental systems (IMPA-2006), Feb 14-17, 2006, CAS, IIT-Delhi.

Das Someshwar, S. Abhilash, M. Dasgupta, J. P. George, and S. R. Kalsi, 2005: Assimilation of Doppler Weather Radar Wind profiles in a mesoscale model and their impact on simulation of thunderstorms. 25th ISRS National Symposium on Emergence of Geoinformatics for development: Trends & Opportunities, Dec 6-9, 2005, BIT, Ranchi.

Das Someshwar, R. Ashrit, M. Moncrieff and C. Liu, 2005: Cloud cluster properties associated with active monsoon systems. International Conf. on MONEX and its legacy, 3-7 Feb 2005, Delhi.

(c)        Technical  Reports (Last 5 years):

Das Someshwar, M.N. Islam and M.K. Das, 2009: Studies of Tornadic Storms over Bangladesh using Radar and WRF Model. SMRC Report No. 28, 48 pp. (Available from SAARC Meteorological Research centre, E-4/C, Agargaon, Dhaka-1207, Bangladesh).

Islam, M.N., Someshwar Das, M.N. Ahsan, M.M. Rahman, M.S.A. Hasanat, L.P. Devkota, S.K. Baidya and K.P. Budhathoki, 2009: Drought diagnosis and monitoring over Bangladesh and Nepal. SMRC Report No. 26, 50 pp. (Available from SAARC Meteorological Research centre, E-4/C, Agargaon, Dhaka-1207, Bangladesh).

Das Someshwar, B.R.S.B. Basnayake, M.K. Das, M.A.R. Akand, M.M. Rahman, M.A. Sarker and M.N. Islam, 2009: Composite Characteristics of Nor’westers observed by TRMM and Simulated by WRF Model. SMRC Report No. 25, 44 pp. (Available from SAARC Meteorological Research centre, E-4/C, Agargaon, Dhaka-1207, Bangladesh).
        
Bhaskar Rao, D.V., Someshwar Das and P. Sanjeeva Rao, 2008: Mesoscale Modeling of Atmospheric Processes in India. Published by the Dept. of Science of Science & Technology, Govt. of India, pp. 113.

Das Someshwar, S. K. Dutta, S.C. Kar, U.C. Mohanty and P.C. Joshi, 2007: Simulation of the Indian summer monsoon using ISRO vegetation fraction and downscaling by a regional climate model. ISRO-GBP Project on regional climate modeling, NCMRWF-IIT, Delhi Joint Research report, October 2007, 213 pp.
        
Das Someshwar, R. Ashrit, S. Mohandas, G. R. Iyengar, M. Das Gupta, J. P. George, E. N. Rajagopal and S. K. Dutta, 2007: Performance of Mesoscale Models over India during Monsoon season. NCMRWF Research Report, 144 pp.

Das Someshwar, S. R. Kalsi, S. Abhilash, M. Dasgupta, J. P. George, S.K. Banerjee, S.B. Thampi, D. Pradhan and K. Mohan Kumar, 2006: Assimilation of Indian Doppler Weather Radar wind observations in a mesoscale model and their impact on simulation of thunderstorms and severe weather systems. NCMRWF Research Report No. NMRF/RR/1/ 2006, 121 pp.

 Mohanty, U.C., D.R. Sikka, O.P. Madan, R.S. Pareek, S.R. Kalsi, H.R. Hatwar, B.K. Bandhopadhaya, S.K. Roy Bhowmik, Y.V. Ramarao, D.R. Patnaik, S. Bali, B.L. Verma, A.K. Bohra, Someshwar Das, Ajit Tyagi, V. Srinivas, R. Visen, P.S. Rao ,  2006: Weather summary during PILOT Experiment of Severe Thunderstorms – Observations and Regional Modeling (STORM) Programme – 2006. Dept. of Science & Technology, Govt. of India, PP 146.

Raghavendra Ashrit and Someshwar Das, 2005: Upgradation of MM5 model operational at NCMRWF. NCMRWF Research Report No. NMRF/RR/1/2005, pp30.