Prof. B.N. Goswami, FASc., FNA, FNASc.

Former, Director, Indian Institute of Tropical Meteorology

Important Scientific Achievements:

  • For the first time, the observed northward propagating intraseasonal oscillations of the monsoon cloud band with 30-50 day time scale was simulated by a zonally symmetric general circulation model and a physical mechanism for the basic oscillation was provided (J. Atmos. Sci., 1984)

  • A physical mechanism for the observed north-northwest movement of the Monsoon Depressions provided (Nature, 1987)

  • First quantitative estimates of the predictability of the tropical coupled ocean-atmosphere system made (J.Climate, 1991)

  • A set of intraseasonal unstable modes due to coupled moist processes have been discovered in the tropical coupled ocean atmosphere system and linked to a periodicity of the coupled system (Geophys. Res. Lett., 1991; Proc. Indi. Acad. Sci. (EPS), 1993)

  • The physical mechanism behind the "Spring predictability barrier" in the coupled ocean atmosphere system has been identified. This has laid the foundation for developing initialization scheme for coupled forecasts (Mon. Wea. Rev., 1997)

  • An improved linear model for simulating both the annual cycle and interannual variability of surface wind in the tropics has been developed (Q. J. Roy. Met. Soc., 1996)

  • A quasi-biennial oscillation (QBO) of the tropical atmosphere that can be sustained purely due to internal dynamics has been discovered based on a series of multiyear integrations with a GCM (J. Climate, 1998)

  • A new broad scale index for the Indian summer monsoon has been proposed based on precipitation and a corresponding circulation index has been discovered which relates strongly with the proposed Indian monsoon precipitation (Q. J. Roy. Met. Soc., 1999)

  • Analyses of daily surface winds for ten years reveal the seminal role played by the intraseasonal oscillations in modulating both synoptic and interannual variability of the Indian summer monsoon (Proc. Ind. Aca. Sci., 1998)

  • A new mode of variability discovered in the Indian ocean, namely the Indian Ocean Dipole Mode ( Nature, 1999)

  • A mechanism of ENSO-monsoon interaction on interdecadal time scale has been elucidated (J. Climate, 2000)

  • Role of monsoon intraseasonal oscillations in limiting the predictability of the seasonal mean has been established (J. Climate, 2001)

  • Predictability of monsoon ISOs has been estimated and an empirical model for predicting monsoon breaks about 3 weeks in advance has been developed (Geophys. Res. Lett, 2003)

  • The mechanism of structure and scale selection of the quasi-biweekly mode (QBM) of the monsoon has been identified (Q. J. Roy. Met. Soc., 2004)

  • Identification of a new extratropical teleconnection pathway through which ENSO influences the Indian monsoon rainfall via modification of meridional gradient of tropospheric temperature ( Geophys. Res. Lett. 2005)

  • Unraveling of a physical mechanism of how north Atlantic SST influences Indian monsoon on interdecadal and longer time scales. (Geophys. Res. Lett. 2006)

  • Applicability of the regime transition rules for the Lorenz model in predicting the duration of monsoon breaks is explored. (Geophysic. Res. Lett., 2006)

  • Factors responsible for limited predictability of the Asian summer monsoon are investigated within a concpetual frame work of predictability. (J. Climate, 2006)

  • The first evidence of a significant rising trend in the frequency and intensity of heavy rain events and decreasing trend in the frequency of light to moderate rain events over central India in the monsoon season during 1951-2000 is produced. (Science, December 2006)