Role of ocean heat content in boosting post-monsoon tropical storms over Bay of Bengal during La-Niña events

  • Suchandra Aich Bhowmick
  • N. Agarwal
  • M. M. Ali
  • C. M. Kishtawal
  • Rashmi Sharma
Article
  • 99 Downloads

Abstract

This study aims to analyze the role of ocean heat content in boosting the post-monsoon cyclonic activities over Bay of Bengal during La-Niña events. In strong La-Niña years, accumulated cyclone energy in Bay of Bengal is much more as compared to any other year. It is observed that during late June to October of moderate to strong La-Nina years, western Pacific is warmer. Sea surface temperature anomaly of western Pacific Ocean clearly indicates the presence of relatively warmer water mass in the channel connecting the Indian Ocean and Pacific Ocean, situated above Australia. Ocean currents transport the heat zonally from Pacific to South eastern Indian Ocean. Excess heat of the southern Indian Ocean is eventually transported to eastern equatorial Indian Ocean through strong geostrophic component of ocean current. By September the northward transport of this excess heat from eastern equatorial Indian Ocean to Bay of Bengal takes place during La-Nina years boosting the cyclonic activities thereafter.

Keywords

La-Niña Bay of Bengal Tropical cyclones Ocean heat content 

References

  1. Ali MM, Jagadeesh PSV, Jain S (2007) Effects of eddies and dynamic topography on the Bay of Bengal cyclone intensity. EOS Trans AGU 88(8):93–95CrossRefGoogle Scholar
  2. Ali MM, Kashyap T, Nagamani PV (2013) Use of sea surface temperature for cyclone intensity prediction needs a relook. EOS 94:117CrossRefGoogle Scholar
  3. Balmaseda MA, Mogensen K, Weaver A (2013) Evaluation of ECMWF ocean reanalysis system ORAS4. QJRMS 139(674):1132–1161CrossRefGoogle Scholar
  4. Cabanes C, Grouazel A, von Schuckmann K, Hamon M, Turpin V, Coatanoan C, Paris F, Guinehut S, Boone C, Ferry N, Boyer Montégut B, Carval T, Reverdin G, Pouliquen S, Traon P (2013) The cora dataset: validation and diagnostics of in situ ocean temperature and salinity measurements. Ocean Sci 9:1–18. doi:10.5194/os-9-1-2013 CrossRefGoogle Scholar
  5. Felton CS, Subrahmaniyam B, Murthy VSN (2013) ENSO—modulated cyclogenesis over the Bay of Bengal. J Clim 26:9806–9817CrossRefGoogle Scholar
  6. Girishkumar MS, Thanga Prakash VP, Ravichandran M (2015) Influence of Pacific Decadal Oscillation on the relationship between ENSO and tropical cyclone activity in the Bay of Bengal during October–December. Clim Dyn Clim Dyn 44:3469–3479CrossRefGoogle Scholar
  7. Goni GJ, Trinanes JA (2003) Ocean thermal structure monitoring could aid in the intensity forecast of tropical cyclones. EOS Trans AGU 84(51):573CrossRefGoogle Scholar
  8. Goswami BN, Ajayamohan RS, Xavier PK, Sengupta D (2003) Clustering of synoptic activity by Indian summer monsoon intraseasonal oscillations. Geophys Res Lett 30:1431. doi:10.1029/2002GL016734 Google Scholar
  9. Häkkinen S, Rhines PB, Worthen DL (2016) Warming of global ocean: spatial structures and water mass trends. J Clim 29:4949–4963CrossRefGoogle Scholar
  10. Kikuchi K, Wang B (2010) Formation of tropical cyclones in the northern Indian Ocean associated with two types of tropical intraseasonal oscillation modes. J Meteorol Soc Jpn 88:475–496CrossRefGoogle Scholar
  11. Li Z, Yu W, Li T, Murty VSN, Tangang F (2013) Bimodal character of cyclone climatology in the Bay of Bengal modulated by monsoon seasonal cycle. J Clim 26:1033–1046CrossRefGoogle Scholar
  12. Nagura M, McPhaden MJ (2008) The dynamics of zonal current variations in the central equatorial Indian Ocean. Geophys Res Lett 35:L23603. doi:10.1029/2008GL035961 CrossRefGoogle Scholar
  13. Shay LK, Goni GJ, Black PG (2000) Effects of a warm oceanic feature on Hurricane Opal. Mon Weather Rev 128(5):1366–1383CrossRefGoogle Scholar
  14. Sikhakolli R, Sharma R, Kumar R, Gohil BS, Sarkar A, Prasad KVSR, Basu S (2013) Improved determination of Indian Ocean surface currents using satellite data. Rem Sens Lett 4:335–343CrossRefGoogle Scholar
  15. Wyrtki K (1973) An equatorial jet in the Indian Ocean. Science 181:262–264. doi:10.1126/science.181.4096.262 CrossRefGoogle Scholar
  16. Yanase W, Satoh M, Taniguchi H, Fujinami H (2012) Seasonal and intraseasonal modulation of tropical cyclogenesis environment over the Bay of Bengal during the extended summer monsoon. J Clim 25:2914–2930CrossRefGoogle Scholar
  17. Yuan DL, Han WQ (2006) Roles of equatorial waves and western boundary reflection in the seasonal circulation of the equatorial Indian Ocean. J Phys Oceanogr 36(5):930–944. doi:10.1175/JPO2905.1 CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Space Applications CentreIndian Space Research OrganizationAhmedabadIndia
  2. 2.Center for Ocean-Atmospheric Prediction StudiesFlorida State UniversityTallahasseeUSA

Personalised recommendations