Indian Institute of Tropical Meteorology

Scientist Profile

Shri. Saumyendu De

Designation

: Retired Scientist

Phone

: +91-(0)20-25904278

Fax

: +91-(0)20-25865142

Email ID

: sde[at]tropmet[dot]res[dot]in

Academic Records

Degree	University	Year	Stream
M.Tech.	Calcutta University	1990	Atmospheric Science
M.Sc.	Vidyasagar University	1987	Applied Mathematics
B.Sc.	Calcutta University	1984	Physics

Research

Monsoon dynamics

Applications of Scale interactions and error energetics in Monsoon variability and predictability

Awards & Honors

Award Name	Awarded By	Awarded For	Year

Scientific Careers

Year	Designation	Institute
2015-Present	Scientist D	Indian Institute of Tropical Meteorology, Pune
2010-2015	Scientist C	Indian Institute of Tropical Meteorology, Pune
2005-2010	Scientist B	Indian Institute of Tropical Meteorology, Pune
2000-2005	Junior Scientific Officer	Indian Institute of Tropical Meteorology, Pune
1995-2000	Senior Scientific Assistant	Indian Institute of Tropical Meteorology, Pune

Research Highlight

On unravelling mechanism of interplay between cloud and large scale circulation: a grey area in climate science

The fundamental puzzles of climate science remain unresolved because of our limited understanding of how cloud, circulation and climate interact among themselves. The interaction between cloud and large scale circulation is much less explored area in climate science. The above diagram elaborates schematically the processes involved in the interplay between cloud and large scale circulations.

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Sponsored Project

A project entitled,”Role of High Frequency Oscillations on the variability and predictability of the Monsoon Transients over the CTCZ through the nonlinear energy and error energy of prognostic model” was sanctioned by MoES under CTCZ program.

Duration of Project : 2011-2014

P. I. Saumyendu De

Refreed Journals

Hazra, V., Pattnaik, S., De, S. et al. Segregation of Forecast Errors in the Planetary Boundary Layer Parameterization Over the State of Odisha and Neighboring Regions in India During Summer Monsoon Season. Pure Appl. Geophys. 178, 583–601 (2021). https://doi.org/10.1007/s00024-020-02651-5
De S., Sahai A.K., Was the earliest documented account of tornado dynamics published by an Indian scientist in an Indian journal, Weather, 75, April 2020, DOI:10.1002/wea.3485, 120-123
De S., Agarwal N.K., Hazra A., Chaudhari H.S., Sahai A.K., On unravelling mechanism of interplay between cloud and large scale circulation: a grey area in climate science, Climate Dynamics, 52, March 2019, DOI:10.1007/s00382-018-4211-6, 1547–1568
Abhilash S., Mandal R., Dey A., Phani R., Joseph S., Chattopadhyay R., De S., Agarwal N.K., Sahai A.K., Devi S.S., Rajeevan M., Role of enhanced synoptic activity and its interaction with intraseasonal oscillations on the lower extended range prediction skill during 2015 monsoon season, Climate Dynamics, 51, November 2018, DOI:10.1007/s00382-018-4089-3, 3435–3446
Agarwal N.K., Naik S.S., De S., Sahai A.K., Why are the Indian monsoon transients short-lived and less intensified during droughts vis-à-vis good monsoon years? An inspection through scale interactive energy exchanges in frequency domain, International Journal of Climatology, 36, June 2016, DOI:10.1002/joc.4531, 2958-2978
De S., Hazra A., Chaudhari H.S., Does the modification in “critical relative humidity” of NCEP CFSv2 dictate Indian mean summer monsoon forecast? Evaluation through thermodynamical and dynamical aspects, Climate Dynamics, 46, February 2016, DOI:10.1007/s00382-015-2640-z, 1197-1222
Abhilash S., Sahai A.K., Borah N., Chattopadhyay R., Joseph S., Sharmila S., De S., Goswami B.N., Does bias correction in the forecasted SST improve the extended range prediction skill of active-break spells of Indian summer monsoon rainfall?, Atmospheric Science Letters, 15, June 2014, DOI:10.1002/asl2.477, 114–119
Abhilash S., Sahai A.K., Borah N., Chattopadhyay R., Joseph S., Sharmila S., De S., Goswami B.N., Arun Kumar, Prediction and monitoring of monsoon intraseasonal oscillations over Indian monsoon region in an ensemble prediction system using CFSv2, Climate Dynamics, 42, May 2014, DOI:10.1007/s00382-013-2045-9, 2801-2815
De S., Sahai A.K., Predictability of Indian monsoon circulation with high resolution ECMWF model in the perspective of tropical forecast during the tropical convection year 2008, Pure and Applied Geophysics, 170, December 2013, DOI:10.1007/s00024-013-0642-5, 2351–2368
Abhilash S., Sahai A.K., Pattnaik S., De S., Predictability during active break phases of Indian summer monsoon in an ensemble prediction system using climate forecast system, Journal of Atmospheric and Solar Terrestrial Physics, 100-101, August 2013, DOI:10.1016/j.jastp.2013.03.017, 13-23
Pattnaik S., Abhilash S., De S., Sahai A.K., Phani R., Goswami B.N., Influence of convective parameterization on the systematic errors of Climate Forecast System (CFS) model over the Indian monsoon region from an extended range forecast perspective, Climate Dynamics, 41, July 2013, DOI:10.1007/s00382-013-1662-7, 341–365
Sahai A.K., Sharmila S., Abhilash S., Chattopadhyay R., Borah N., Krishna R.P.M.,Joseph Susmitha, Roxy M., De S., Pattnaik S., Pillai P.A., Simulation and Extended range prediction of Monsoon Intraseasonal Oscillations in NCEP CFS/GFS version 2 framework, Current Science, 104, May 2013, 1394-1408
De S., Investigating origin of the inadequate medium range predictability of the lower tropospheric ultra-long waves in tropics, Journal of Earth System Science, 119, December 2010, 783-802
De S., Role of nonlinear scale interactions in limiting dynamical prediction of lower tropospheric boreal summer intraseasonal oscillations, Journal of Geophysical Research, 115, November 2010, D21127, 1-18, doi:10.1029/2010JD013955
De S., Chakraborty D.R., Variability of tropical error characteristics in the NCEP (MRF) lower tropospheric wind forecasts during two contrasting seasons, Meteorology and Atmospheric Physics, 98, December 2007, 175-194 DOI:10.1007/s00703-007-0258-3
De S., Chakraborty D.R., Tropical systematic and random error energetics based on NCEP (MRF) analysis-forecast system - a barotropic approach, Part I: in physical domain, Proc. Indian Academy of Sciences (Earth and Planetary Sciences), 113, 2004, 151-166
De S., Chakraborty D.R., Tropical systematic and random error energetics based on NCEP (MRF) analysis-forecast system - a barotropic approach, Part II: in wavenumber domain, Proc. Indian Academy of Sciences (Earth and Planetary Sciences), 113, 2004, 167-195
De S. and Subramanyam D., Role of monsoon zonal flow on CISK instability and vice-versa: a sensitivity study, Indian Journal of Radio and Space Physics, 28, 1999, 232-239

Other Publications

Article published as a chapter in a book

Indian Summer Monsoon Variability: El Niño-teleconnections and beyond" edited by Jasti Chowdari, Anant Parekh and C. Gnanaseelan. Publisher: Elsevier, Book DOI no. https://doi.org/10.1016/C2019-0-04482-2
El Niño–Indian summer monsoon relation—a nonlinear scale interactive energy exchange perspective" by S. De and N. K. Agarwal has been published on 20th August 2021, pages 105- 130, https://doi.org/10.1016/B978-0-12-822402-1.00025-9

Abstract published in European Geophysical Union General Assembly

An Abstract by Saumyendu De, Atul Kumar Sahai, and Bhupendra Nath Goswami entitled,” Nonlinear Scale Interaction: A possible mechanism of up-scale error transport attributing to the inadequate predictability of Intra-seasonal Oscillations” was published in Geophysical research Abstract, Vol 15, EGU2013-1273

I.I.T.M. Research Report published

A research report by Abhilash S., Susmitha Joseph, R. Chattopadhyay, S. Pattnaik*,P. Murali Krishna, S. Dey, A. K. Sahai and B.N. Goswami entitled,”Performance of an Ensemble Prediction System based on CFSV2 for the Extended Range Prediction of Active-Break Spells of Indian Summer Monsoon Rainfall during 2011” was published in IITM Research Report, 2012, RR-128

No Record found.

आईआईटीएम
IITM

भारतीय उष्णदेशीय मौसम विज्ञान संस्थान
Indian Institute of Tropical Meteorology

Scientist Profile

Shri. Saumyendu De

Designation

: Retired Scientist

Phone

: +91-(0)20-25904278

Fax

: +91-(0)20-25865142

Email ID

: sde[at]tropmet[dot]res[dot]in

Area of Expertise

Academic Records

Research

Awards & Honors

Scientific Careers

Research Highlight

Scientist Profile

Shri. Saumyendu De

Designation : Retired Scientist

Phone : +91-(0)20-25904278

Fax : +91-(0)20-25865142

Email ID : sde[at]tropmet[dot]res[dot]in

Area of Expertise

Academic Records

Research

Awards & Honors

Scientific Careers

Research Highlight

Designation

: Retired Scientist

Phone

: +91-(0)20-25904278

Fax

: +91-(0)20-25865142

Email ID

: sde[at]tropmet[dot]res[dot]in