Debasis Sengupta

           Associate Professor 
 
 
 

           Office

  Email:     dsen@caos.iisc.ernet.in 
  Phone:   +91-80-360-0450 
                +91-80-309-2505 
  Fax:       +91-80-360-0865 

 
            Mailing Address
  Centre for Atmospheric and Oceanic Sciences 
  Indian Institute of Science 
  Bangalore 
  India 

 
 
 

 
  Research interests
  Publications

 
 
 
 

       Research interests

  •   Oceanography 
  •   Physics of the Indian Ocean 
  •   Tropical Ocean-Atmosphere Interaction 
  •   Predictability of Ocean and Climate
  •   Ocean modellling 

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      Publications

         Refereed publications:

  1. Prahalad, Y. S. and D. Sengupta (1986): Barotropic planetary waves on a random bottom.  Wave Motion, 8, 407. 
  2. Fernades, A. A., Y. S. Prahalad and D. Sengupta (1989): Scattering of Rossby and Poincare waves off rough lateral boundaries. Dynamics Atmos. Ocean., 14, 41. 
  3. Sengupta, D., L. I. Piterbarg and G. M. Reznik (1990): Topographic Rossby waves on random relief.  Oceanography, 30(4), 70. 
  4. Sengupta, D., L. I .Piterbarg and G. M. Reznik (1993): Localisation of topographic Rossby waves over random relief. Dynamics Atmos. Ocean, 17, 1. 
  5. Sengupta, D. (1994): Localisation of Rossby waves over random topography: Two layer ocean.  J. Phys. Oceanography, 24, 1065. 
  6. Vinayachandran, P. N., S. R. Shetye, D. Sengupta and S. Gadgil (1996): Forcing mechanisms of the Bay of Bengal circulation. Current Science, 71(10), 753. 
  7. Goswami, B. N., K. Rajendran and D. Senupta (1997): Source of seasonality and scale dependence of predictability in a coupled ocean-atmosphere model. Mon. Weather. Rev., 125, 846. 
  8. Goswami. B. N., D. Sengupta and G. Suresh Kumar (1998): Intraseasonal oscillations and interannual variability of surface winds over the Indian monsoon region. Proc. Indian Acad. Sci. (Earth Planet. Sci.), 107, 1, pp 45-64. 
  9. Premkumar, K., M. Ravichandran, S.R. Kalsi, D. Sengupta, S. Gadgil  (1999): First results from a new observational system over the Indian Seas.  Current Science,  78, 323.
  10. Sengupta, D., R. Senan and B. N. Goswami  (2001): Origin of intraseasonal variability of circulation in the tropical central Indian Ocean. Geophysical Research Letters, 28, 7, 1267-1270. [download PDF file]
  11. Sengupta, D.,  and M. Ravichandran (2001): Oscillations of Bay of Bengal sea surface temperature during the 1998 summer monsoon. Geophysical Research Letters, 28, 10, 2033-2036. [download PDF file]
  12. Sengupta, D.,  B. N. Goswami and R. Senan (2001): Coherent Intraseasonal oscillations of the Ocean and Atmopshere during the Asian summer monsoon. Geophysical Research Letters., 28, 21, 4127-4130. [download PDF file]
  13. Bhat G. S., S. Gadgil, P. V. Hareesh Kumar, S. R. Kalsi, P. Madhusoodanan, V. S. N. Murty, C. V. K. Prasada Rao, V. Ramesh Babu, L. V. G. Rao, R. R. Rao, M. Ravichandran, K. G. Reddy, P. Sanjeeva Rao, D. Sengupta, D. R. Sikka, J. Swain and P. N. Vinayachandran (2001): BOBMEX - The Bay of Bengal Monsoon Experiment. Bull. Am. Met. Soc., 82, 10, 2217-2243.[download PDF file]
  14. Gopalakrishna, V. V., V. S. N. Murty, D. Sengupta, S. Shenoy and N. Araligidad (2002): Upper ocean stratification and circulation in the northern Bay of Bengal during the southwest monsoon of 1991. Continental Shelf Res., 22, 791-802. [download PDF file]
    15.  
  15. Sengupta, D.,  P. K. Ray and G. S. Bhat (2002): Spring Warming of the Eastern Arabian Sea and Bay of Bengal from Buoy Data. Geophysical Research Letters, 28, 22, 10.1029/2002GL015340. [download PDF file]
    16.  
  16. Senan, R., D. Sengupta,  and B. N. Goswami (2003): Intraseasonal "Monsoon Jets" in the equatorial Indian Ocean. Geophysical Research Letters, 30, 14, 1750, doi:10.1029/2003GL017583. [download PDF file]
    17.  
  17. Goswami, B N, and D. Sengupta (2003): A Note on the Deficiency of NCEP/NCAR Reanalysis Surface Winds over the Equatorial Indian Ocean. J. Geophys. Res., 108(C4), 3124, doi:10.1029/2002JC001497, 2003.
    18.  
  18. D. Sengupta,  R. Senan, V. S. N. Murty and V. Fernando (2004): A biweekly in the equatorial Indian Ocean. J. Geophysical Research, 109, C10003, 10.1029/2004JC002329. [download PDF file]
    19.  
  19. Goswami, B. N., M. S. Madhusoodanan, C. P. Neema, and D. Sengupta (2006), A physical mechanism for North Atlantic SST influence on the Indian summer monsoon, Geophysical Research Letters, 33, L02706, doi:10.1029/2005GL024803.
    20.  
  20. Sengupta, D., R. Senan, B. N. Goswami and J. Vialard (2006): Intraseasonal variability of equatorial Indian Ocean zonal currents. Journal of Climate , to appear. [download PDF file]
    21.  
  21. Miyama, T., J. P. McCreary, D. Sengupta and R. Senan (2006): Dynamics of biweekly oscillations in the equatorial Indian Ocean. Journal of Physical Oceanography, to appear.
    22.  

          Other publications:

  1. Prakash, L. H., D. Sengupta, G. Iyengar and A. K. Bohra 1991: Ocean feedback to monsoon rains in northern Bay of Bengal.  Implications for the medium range weather forecasts.  NCMRWF Tech. Report, 1/91. 
  2. Sengupta, D., P. Joseph, R. Senan and G. Suresh Kumar (1999): Validation of NCEP daily surface winds over the north Indian ocean. CAOS Report 99AS1. 
  3. Sengupta, D., R. Senan, G. Suresh Kumar and C. Kalyani Devasena  (1999): Intraseasonal variability of the northeast Indian Ocean circulation in an ocean model. CAOS Report 99AS2. 
  4. Senan, R., D. S. Anitha and D. Sengupta.  (2001): Validation of SST and wind speed from TRMM using north Indian Ocean moored buoy observations. CAOS Report 2001AS1. 
  5. H. Rahman and D. Sengupta.  (2007): Preliminary Comparison of Daily Rainfall from Satellites and Indian Gauge Data. CAOS Report 2007AS1. [download PDF file] 

          Conference Proceedings:

  1. Sengupta, D. and Y. S. Prahalad 1985: Planetary wave propagation across a rough ridge.  Proc. 29th International Conf. Theor. Appl. Mech,  II-8, ISTAM. 
  2. Sengupta, D. and R. Mahadevan 1987: Bispectra of ocean surface waves.  Proc. III Indian Conf. Ocean Engg.,  A-153. 
  3. Goswami, B. N., K. Rajendran and D. Sengupta 1995: On the seasonality of the predictability of ENSO.  Proc. Intl. Sci. Conf. on Trop. Ocean Global Atmos. (TOGA) Programme, Vol. II  WCRP -91- WMO/TD No. 717. p710-714. 
  4. Sengupta, D. (1998): Intraseasonal variability of currents south of Sri Lanka in a GCM. IOCINDIO  Regional  Workhop on Trop. Ocean and Climate. (November 1998, Bangalore). 
  5. R. Senan, D. Sengupta, V. S. N. Murty, B. N. Goswami and M. S. S. Sarma (2003): Variability of equatorial Indian Ocean currents during 1999-2002. Presented at the 2003 IUGG meeting, Sapporo, Japan, 30 June - 11 July 2003.
  6. D. Sengupta, R. Senan, V. S. N. Murty and V. Fernando (2003): Biweekly variability of meridional currents in the eastern Indian Ocean. Presented at the 2003 IUGG meeting, Sapporo, Japan, 30 June - 11 July 2003.
    7. [download Armex_workshop-22dec03.ppt file]