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Variability of mini cold pool off the southern tip of India as revealed from a thermodynamic upper ocean model

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Abstract

A 2.5-layer thermodynamic ocean model has been used to understand the processes associated with the formation of cold pool off southern tip of India. The mean model simulations from the 13 year integration for the period 1992–2004 renders a cold region off southern tip of India during the months of June to September which is recognized as mini cold pool (MCP). The inter-annual and intra-seasonal variability of the MCP for the 5 years from 2000 to 2004 is explored in detail in the present paper. The analysis of model SST shows intense and widespread MCP during the long breaks occurred in the months of July and August of the bad monsoon years 2002 and 2004. The intense cooling is in response to the wind induced upwelling and the resultant entrainment of cold water from the bottom layer. The presence of cyclonic gyre in the model currents also supports the intense MCP which might modulate the monsoon during break phase.

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References

  • Behera SK, Salvekar PS, Yamagata T (1998) Simulation of interannual SST variability in North Indian Ocean. WOCE Newsl 33:7–9

    Google Scholar 

  • Behera SK, Salvekar PS, Yamagata T (2000) Simulation of interannual SST variability in the tropical Indian Ocean. J Clim 13:3487–3499

    Article  Google Scholar 

  • Bruce JG, Johnson DR, Kindle JC (1994) Evidence for eddy formation in the eastern Arabian sea during the northeast monsoon. J Geophys Res 99:7651–7664

    Article  Google Scholar 

  • Johannessen OM, Subbaraju G, Blindheim J (1987) Seasonal variation of the oceanographic conditions of the southwest coast of India during 1971–1975. Fiskeirdir.skr. ser. Havunders 8:247–261

    Google Scholar 

  • Joseph PV, Sijikumar S (2004) Intraseasonal variability of the low-level jet stream of the Asian summer monsoon. J Clim 17:1449–1458

    Article  Google Scholar 

  • Joseph PV, Sooraj KP, Babu CA, Sabin TP (2005) A cold pool in the Bay of Bengal and its interaction with the active-break cycle of monsoon. CLIVAR Exchanges 10(3):10–12

    Google Scholar 

  • Luis AJ, Kawamura H (2002) A case study of sea surface temperature near the Indian tip during May 1997. J Geophys Res 107(C10):3171. doi:10.1029/2000JC000778

    Article  Google Scholar 

  • McCreary JP, Kundu PK, Molinari RL (1993) A numerical investigation of the dynamics, thermodynamics and mixed-layer processes in the Indian Ocean. Prog Oceanogr 31:181–244

    Article  Google Scholar 

  • Murtugudde R, Busalacchi AJ (1999) Interannual variability of the dynamics and thermodynamics of the tropical Indian Ocean. J Clim 12:2300–2326

    Article  Google Scholar 

  • Rao YP (1976) Southwest monsoon. Meteorological Monograph—Synoptic Meteorology No. 1/976. India Meteorological Department, New Delhi, 367 p

  • Rao RR, Girishkumar MS, Ravichandran M, Samala BK, Sreedevi N (2006a) Observed mini cold pool off the southern tip of India and its intrusion into the south central Bay of Bengal during summer monsoon season. Geophys Res Lett 33:L06607. doi:10.1029/2005GL025382

    Article  Google Scholar 

  • Rao RR, Girishkumar MS, Ravichandran M, Samala BK, Anitha G (2006b) Observed intraseasonal variability of mini cold pool off the southern tip of India and its intrusion into the south central Bay of Bengal during summer monsoon season. Geophys Res Lett 33:L15606. doi:10.1029/2006GL026086

    Article  Google Scholar 

  • Saji NH, Goswami BN, Vinaychndran PN, Yamagata T (1999) A dipole mode in the tropical Indian Ocean. Nature 401:360–363

    Google Scholar 

  • Shankar D, Shetye S (1997) On the dynamics of the Lakshadweep high and low in the southern Arabian sea. J Geophys Res 102(C6):12551–12562

    Article  Google Scholar 

  • Shankar D, Vinayachandran PN, Unnikrishnan AS (2002) Monsoon currents in the Arabian Sea and Bay of Bengal. Prog Oceanogr 52:63–120

    Article  Google Scholar 

  • Shenoi SC, Shankar D, Gopalkrishna VV, Durand F (2005) Role of ocean in the genesis and annihilation of the core of the warm pool in the southeastern Arabian Sea. Mausam 56:2147–2160

    Google Scholar 

  • Vecchi GA, Harrison DE (2002) Monsoon breaks and subseasonal sea surface temperature variability in the Bay of Bengal. J Clim 15:1485–1493

    Article  Google Scholar 

  • Vinayachandran PN, Saji NH, Yamagata T (1999a) Response of the equatorial Indian Ocean to an unusual wind event during 1994. Geophys Res Lett 26:1613–1616

    Article  Google Scholar 

  • Vinayachandran PN, Masumoto Y, Mikawa T, Yamagata T (1999b) Intrusion of southwest monsoon current into the Bay of Bengal. J Geophys Res 104(C5):11077–11085

    Article  Google Scholar 

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Acknowledgments

Authors are thankful to the director of I.I.T.M., for his support. They acknowledge Shri. V. H. Bakshi for his help in preparing the manuscript. Authors are grateful to Dr Brian Doty for the GrADs software, which is used for analysis and preparing graphics. Comments from two anonymous reviewers helped us to improve the manuscript.

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  1. Indian Institute of Tropical Meteorology, Dr Homi Bhabha Road, Pashan, Pune, 411008, India

    D. W. Ganer, A. A. Deo & C. Gnanaseelan

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  1. D. W. Ganer
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  2. A. A. Deo
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  3. C. Gnanaseelan
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Correspondence to A. A. Deo.

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Ganer, D.W., Deo, A.A. & Gnanaseelan, C. Variability of mini cold pool off the southern tip of India as revealed from a thermodynamic upper ocean model. Meteorol Atmos Phys 104, 229–238 (2009). https://doi.org/10.1007/s00703-009-0029-4

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  • DOI: https://doi.org/10.1007/s00703-009-0029-4

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