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Towards understanding the unusual Indian monsoon in 2009

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Abstract

The Indian summer monsoon season of 2009 commenced with a massive deficit in all-India rainfall of 48% of the average rainfall in June. The all-India rainfall in July was close to the normal but that in August was deficit by 27%. In this paper, we first focus on June 2009, elucidating the special features and attempting to identify the factors that could have led to the large deficit in rainfall. In June 2009, the phase of the two important modes, viz., El Niño and Southern Oscillation (ENSO) and the equatorial Indian Ocean Oscillation (EQUINOO) was unfavourable. Also, the eastern equatorial Indian Ocean (EEIO) was warmer than in other years and much warmer than the Bay. In almost all the years, the opposite is true, i.e., the Bay is warmer than EEIO in June. It appears that this SST gradient gave an edge to the tropical convergence zone over the eastern equatorial Indian Ocean, in competition with the organized convection over the Bay. Thus, convection was not sustained for more than three or four days over the Bay and no northward propagations occurred. We suggest that the reversal of the sea surface temperature (SST) gradient between the Bay of Bengal and EEIO, played a critical role in the rainfall deficit over the Bay and hence the Indian region. We also suggest that suppression of convection over EEIO in association with the El Niño led to a positive phase of EQUINOO in July and hence revival of the monsoon despite the El Niño. It appears that the transition to a negative phase of EQUINOO in August and the associated large deficit in monsoon rainfall can also be attributed to the El Niño.

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References

  • Bhat G S 2006 The Indian drought of 2002 — a subseasonal phenomenon?; Quart. J. Roy. Meteor. Soc. 132 2583–2602.

    Article  Google Scholar 

  • Ding Y and Sikka D R 2006 Synoptic systems and weather; The Asian Monsoon (ed.) Wang B, Springer-Verlag, 131–201.

  • Ding Q and Wang B 2007 Intraseasonal teleconnection between the Eurasian wave train and Indian summer monsoon; J. Climate 20 3751–3767.

    Article  Google Scholar 

  • Francis P A, Gadgil S and Vinayachandran P N 2007 Triggering of positive dipole by severe cyclones over the Bay of Bengal; Tellus -A 59 461–475.

    Article  Google Scholar 

  • Francis P A and Gadgil S 2009 The aberrant behaviour of the Indian monsoon in June 2009; Curr. Sci. 97(9) 1291–1295.

    Google Scholar 

  • Gadgil S 2003 The Indian Monsoon and its variability; Ann. Rev. Earth. Planet. Sci. 31 429–467.

    Article  Google Scholar 

  • Gadgil Sulochana and Joseph P V 2003 On breaks of the Indian monsoon; Proc. Indian Acad. Sci. (Earth Planet. Sci.) 112 529–558.

    Google Scholar 

  • Gadgil S, Joseph P V and Joshi N V 1984 Ocean-atmosphere coupling over monsoonal regions; Nature 312 141–143.

    Article  Google Scholar 

  • Gadgil S, Vinayachandran P N and Francis P A 2003 Droughts of Indian summer monsoon: Role of clouds over the Indian Ocean; Curr. Sci. 85 1713–1719.

    Google Scholar 

  • Gadgil S, Vinayachandran P N, Francis P A and Gadgil S 2004 Extremes of the Indian summer monsoon rainfall, ENSO and the equatorial Indian Ocean Oscillation; Geophys. Res. Lett. 31(L1) 2213, doi: 10.1029/2004GL019733.

    Google Scholar 

  • Gadgil S, Rajeevan M and Nanjundiah R 2005 Monsoon prediction — Why yet another failure? Curr. Sci. 88 1389–1400.

    Google Scholar 

  • Graham N E and Barnett T P 1987 Sea surface temperature, surface wind divergence and convection over tropical oceans; Science 238 657–659.

    Article  Google Scholar 

  • Ihara C, Kushnir Y, Cane M A and De la Peña V 2007 Indian summer monsoon rainfall and its link with ENSO and the Indian Ocean indices; Int. J. Climatol. 27 179–187.

    Article  Google Scholar 

  • Ihara C, Kushnir Y, Cane M A and Kaplan A 2008 Timing of El Niño-related warming and Indian summer monsoon rainfall; J. Climate 21(11) 2711–2719.

    Article  Google Scholar 

  • Joseph P V and Srinivasan J 1999 Rossby waves in May and the Indian Summer Monsoon Rainfall; Tellus 51A 854–864.

    Google Scholar 

  • Kalnay E, Kanamitsu M, Kistler R, Collins W, Deaven D, Gandin L, Iredell M, Saha S, White G, Woollen J, Zhu Y, Leetmaa A, Reynolds R, Chelliah M, Ebisuzaki W, Higgins W, Janowiak J, Mo K, Ropelewski C, Wang J, Jenne R and Joseph D 1996 The NCEP/NCAR 40-Year Reanalysis Project; Bull. Amer. Meteor. Soc. 77 437–471.

    Article  Google Scholar 

  • Kripalani R H, Kulkarni A A and Singh S V 1997 Association of the Indian summer monsoon with the northern hemisphere mid-latitude circulation; Int. J. Climatol. 17 1055–1067.

    Article  Google Scholar 

  • Krishnamurti T N, Bedi H S and Subramaniam M 1989 The summer monsoon of 1987; J. Climate 2 321–340.

    Article  Google Scholar 

  • Krishnamurti T N, Thomas A, Simon A and Kumar V 2009 Desert air incursions, an overlooked aspect, for the dry spells of Indian summer monsoon (sumbitted to J. Atmos. Sci.).

  • Krishna Kumar K, Rajagopalan B, Hoerting M, Bates G and Cane M 2006 Unraveling the mystery of Indian monsoon failure during El-Niño; Science 314 115–119.

    Article  Google Scholar 

  • Liebmann B and Smith C A 1996 Description of a complete (interpolated) outgoing longwave radiation dataset; Bull. Amer. Meteor. Soc. 77 1275–1277.

    Google Scholar 

  • Nanjundiah R 2009 A quick-look assessment of forecasts for the Indian summer monsoon rainfall in 2009; 2009-AS-2, CAOS Technical Report, Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bangalore. Pant G B and Parthasarathy B 1981 Some aspects of an association between the southern oscillation and Indian summer monsoon; Arch. Meteorol. Geophys. Biokl. 29 245–251.

    Google Scholar 

  • Parthasarathy B, Munot A A and Kothawale D R 1994 All India monthly and seasonal rainfall series 1871–1993; Theor. Appl. Climatol 49 217–224.

    Article  Google Scholar 

  • Premkumar K, Ravichandran M, Kalsi S R, Sengupta D and Gadgil S 2000 First results from a new observational system over the Indian seas; Curr. Sci. 78 323–331.

    Google Scholar 

  • Rajeevan M 1993 Upper tropospheric circulation and thermal anomalies over central Asia associated with major droughts and floods in India; Curr. Sci. 64 244–247.

    Google Scholar 

  • Rajeevan M, Sulochana Gadgil and Jyoti Bhate 2008 Active and break spells of the Indian monsoon, NCC Research Report No. 7/2008, National Climate Centre, India Meteorological Department (available at http://www.imdpune.gov.in).

  • Rajeevan M, Gadgil S and Bhate J 2010 Active and break spells of the Indian summer monsoon; J. Earth Syst. Sci. 119(3) 229–247.

    Article  Google Scholar 

  • Raman C R V and Rao Y P 1981 Blocking highs over Asia and monsoon droughts over India; Nature 289 271–273.

    Article  Google Scholar 

  • Ramaswami C 1958 A preliminary study of the behavior of the Indian southwest monsoon in relation to the westerly jet stream; Geophysica 6 455–477.

    Google Scholar 

  • Rasmusson E M and Carpenter T H 1983 The relationship between eastern equatorial Pacific sea surface temperatures and rainfall over India and Sri Lanka; Mon. Wea. Rev. 111 517–528.

    Article  Google Scholar 

  • Reynolds R W, Rayner N A, Smith T M, Stokes D C and Wang W Q 2002 An improved in situ and satellite SST analysis for climate; J. Climate 15 1609–1625.

    Article  Google Scholar 

  • Sikka D R 1980 Some aspects of the large-scale fluctuations of summer monsoon rainfall over India in relation to fluctuations in the planetary and regional scale circulation parameters; Proc. Indian Acad. Sci. (Earth Planet. Sci.) 89 179–195.

    Google Scholar 

  • Sikka D R and Gadgil S 1980 On the maximum cloud zone and the ITCZ over India longitude during the southwest monsoon; Mon. Weather Rev. 108 1122–1135.

    Article  Google Scholar 

  • Wang B, Lee J-Y, Kang I-S, Shukla J, Kug J-S, Kumar A, Schemm J, Luo J-J, Yamagata T and Park C-K 2008 How accurately do coupled climate models predict the Asian-Australian monsoon interannual variability? Climate Dyn. 30 605–619, doi: 10.1007/s00382-007-0310-5.

    Article  Google Scholar 

  • Yasunari T 1987 Global structure of El Niño/Southern Oscillation. Part I. El Niño composites; J. Met. Soc. Japan 65 67–80.

    Google Scholar 

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Authors and Affiliations

  1. Indian National Centre for Ocean Information Services, Ministry of Earth Science, P. B. No. 21, Ocean Valley, IDA Jeedimethla P. O., Hyderabad, 500 055, India

    P. A. Francis

  2. Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bangalore, 560 012, India

    Sulochana Gadgil

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  1. P. A. Francis
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  2. Sulochana Gadgil
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Correspondence to P. A. Francis.

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Francis, P.A., Gadgil, S. Towards understanding the unusual Indian monsoon in 2009. J Earth Syst Sci 119, 397–415 (2010). https://doi.org/10.1007/s12040-010-0033-6

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  • DOI: https://doi.org/10.1007/s12040-010-0033-6

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