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Oceanic upwelling and downwelling processes in waters off the west coast of India

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Abstract

A three-dimensional model based on the Princeton Ocean Model (POM) has been implemented to study the circulation of the west coast of India. The model uses a curvilinear orthogonal horizontal grid with higher resolution near the coast (3–9 km) and a terrain following sigma coordinate in the vertical. The model is able to simulate Lakshadweep High and Lakshadweep Low (LL) during the winter and summer monsoons, respectively. During winter, the downwelling processes noticed along the coast help in the formation of temperature inversions. The inversions can be seen even up to the depths of ∼50 m, which agrees with the available ARGO data in the region. Model simulations show that coastal upwelling off Kerala is at its peak in July. The intensity of upwelling reduces along the coast towards north. During the existence of LL, there is a cyclonic eddy in the sub-surface waters over the South-Eastern Arabian Sea, with vertical extent up to the depths of 100–150 m and it is strengthened due to the presence of northward counter current in the shelf region. The southerly coastal jet formed along the southern coast as a result of upwelling is noticed a westward shift along with LL. The location of the eddy off Kerala is tilted towards the open ocean with depth and our experiments suggest that this flow can be understood as a first baroclinic mode.

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References

  • Blumberg AF, Mellor GL (1983) Diagnostic and prognostic numerical circulation studies of the South Atlantic Bight. J Geophys Res 88:4579–4592 doi:10.1029/JC088iC08p04579

    Article  Google Scholar 

  • Blumberg AF, Mellor GL (1987) A description of a three-dimensional coastal ocean circulation model. In: Heaps NS (ed) Three-Dimensional Coastal Ocean Models, Coastal Estuarine Studies. Vol. 4. AGU, Washington, pp 1–16

    Google Scholar 

  • Boyer T, Levitus S, Garcia H, Locarnini R, Stephens C, Antonov J (2005) Objective analyses of annual, seasonal, and monthly temperature and salinity for the world ocean on a 1/4 degree grid. J Climatol 25:931–945 doi:10.1002/joc.1173

    Article  Google Scholar 

  • Bruce JG, Johnson DR, Kindle JC (1994) Evidence for eddy formation in eastern Arabian Sea during northeast monsoon. J Geophys Res 99:7651–7664 doi:10.1029/94JC00035

    Article  Google Scholar 

  • Bruce JG, Kipdle JC, Kantha LH, Kerling JL, Bailey JF (1998) Recent observations and modeling in the Arabian Sea Laccadive high region. J Geophys Res 103:7593–7600 doi:10.1029/97JC03219

    Article  Google Scholar 

  • Conkright ME, Boyer TP (2002) World Ocean Atlas 2001: Objective Analyses, Data Statistics, and Figures, CD-ROM Documentation. National Oceanographic Data Center, Silver Spring, p 17

    Google Scholar 

  • Durand F, Shetye SR, Vialard J, Shankar D, Shenoi SSC, Ethe C et al (2004) Impact of temperature inversions on SST evolution in the southeastern Arabian Sea during the pre-summer monsoon season. Geophys Res Lett 31:L01305 doi:10.1029/2003GL018906

    Article  Google Scholar 

  • Ezer T, Mellor GL (1994) Diagnostic and prognostic calculations of the North Atlantic circulation and sea level using a sigma coordinate ocean model. J Geophys Res 99(C7):14159–14171 doi:10.1029/94JC00859

    Article  Google Scholar 

  • Ezer T, Arango H, Shchepetkin AF (2002) Developments in terrain-following ocean models: inter comparisons of numerical aspects. Ocean Model 4:249–267 doi:10.1016/S1463-5003(02)00003-3

    Article  Google Scholar 

  • Gan J, Allen JS (2002) A modeling study of shelf circulation off northern California in the region of the coastal ocean dynamics Experiment 2. Simulations & comparison with observations. J Geophys Res 107:3184 doi:10.1029/2001JC001190

    Article  Google Scholar 

  • Haney RL (1991) On the pressure gradient force over steep topography in sigma coordinate ocean models. J Phys Oceanogr 21:610–619

    Article  Google Scholar 

  • Jain I, Rao AD, Dube SK (1993) Open-boundary conditions for the wind-driven barotropic circulation model of the Arabian Sea. Indian J Mar Sci 22:273–278

    Google Scholar 

  • Jensen TG (1991) Modeling the seasonal undercurrents in the Somali Current system. J Geophys Res 96:22151–22167 doi:10.1029/91JC02383

    Article  Google Scholar 

  • Johns B, Rao AD, Rao GS (1992) On the occurrence of upwelling along the East Coast of India. Estuar Coast Shelf Sci 35:75–90 doi:10.1016/S0272-7714(05)80057-5

    Article  Google Scholar 

  • Johns B, Rao AD, Dube SK, Sinha PC (1993) The effect of freshwater discharge from the Godavari River on the Occurrence of local upwelling off the East Coast of India. Estuar Coast Shelf Sci 37:299–312 doi:10.1006/ecss.1993.1058

    Article  Google Scholar 

  • Kantha LH (1985) Comments on ‘On tidal motion in a stratified inlet, with particular reference to boundary conditions’. J Phys Oceanogr 15:1608–1609

    Article  Google Scholar 

  • Kantha LH, Clayson CA (2000). Numerical models of oceans and oceanic processes. Edt R. Dmowska, J. R. Holton and H. T. Rossby. International Geophysical Series. 66, 940 pp

  • Kurian J, Vinayachandran PN (2006) Formation mechanisms of temperature inversion in the southeastern Arabian Sea. Geophys Res Lett 331:L17611 doi:10.1029/2006GL027280

    Article  Google Scholar 

  • Lopez JW, Kantha LH (2000) Results from a numerical model of the northern Indian Ocean: circulation in the south Arabian Sea. J Mar Syst 24:97–117 doi:10.1016/S0924-7963(99)00081-0

    Article  Google Scholar 

  • Luis AJ, Kawamura H (2002a) A case study of sea surface temperature-cooling dynamics near the Indian tip during May1997. J Geophys Res 107:3171 doi:10.1029/2000JC000778

    Article  Google Scholar 

  • Luis AJ, Kawamura H (2002b) Dynamics and mechanism for sea surface cooling near the Indian tip during winter monsoon. J Geophys Res 107:3187 doi:10.1029/2000JC000455

    Article  Google Scholar 

  • McCreary J, Kundu PK, Molinari RL (1993) A numerical investigation of dynamics, thermodynamics and mixed-layer processes in the Indian Ocean. Prog Oceanogr 31:181–244 doi:10.1016/0079-6611(93)90002-U

    Article  Google Scholar 

  • Mellor GL, Yamada T (1982) Development of a turbulence closure model for geophysical fluid problems. Rev Geophys Space Phys 20:851–875 doi:10.1029/RG020i004p00851

    Article  Google Scholar 

  • Mellor GL, Ezer T, Oey LY (1994) The pressure gradient conundrum of sigma coordinate ocean models. J Atmos Oceanic Technol 11(4):1126–1134 Part 2

    Article  Google Scholar 

  • Mellor GL, Oey LY, Ezer T (1998) Sigma coordinate pressure gradient errors and the seamount problem. J Atmos Ocean Technol 15(5):1122–1131 doi:10.1175/1520-0426(1998)015<1122:SCPGEA>2.0.CO;2

    Article  Google Scholar 

  • Muraleedharan PM, Ramesh Kumar MR, Rao LVG (1995) A note on poleward undercurrent along the southwest coast of India. Cont Shelf Res 15:165–184 doi:10.1016/0278-4343(94)E0021-D

    Article  Google Scholar 

  • Rao LVG, Shree Ram P (2005) Upper Ocean Physical Processes in the Tropical Indian Ocean: A Monograph Prepared under CSIR Emeritus Scientist Scheme. NIO, Visakhapatnam

    Google Scholar 

  • Rao AD, Joshi M, Babu SV (2005) A three dimensional numerical model of coastal upwelling along the west coast of India. Math Comput Model 41(1–2):177–195 doi:10.1016/j.mcm.2004.08.004

    Article  Google Scholar 

  • Risien CM, Chelton DB (2008) A global climatology of surface wind and wind stress fields from 8 years of QuikSCAT scatterometer data. J Phys Oceanogr. doi:10.1175/2008JPO3881.1

  • Sanilkumar KV, Unni VK, James VV (2004) Upwelling characteristics off the southwest coast of India during 2003. Proc. National Symposium on Emerging Trends in the fields of Meteorology & Oceanography METOC—2004, Kochi, India, pp. 137–143.

  • Sanilkumar KV, Unni VK (2005) Upwelling characteristics off the Saurashtra coast during 2004. Proc. National Workshop on Oceanographic Features of Indian Coastal Waters. Kochi, India, pp. 113–118.

  • Shankar D, Shetye SR (1997) On the dynamics of the Lakshadweep high and low in the southeastern Arabian Sea. J Geophys Res 102:12551–12562 doi:10.1029/97JC00465

    Article  Google Scholar 

  • Shankar D, Shenoi SSC, Nayak RK, Vinayachandran PN, Nampoothiri GS, Almeida AM et al (2005) Hydrography of the eastern Arabian Sea during summer monsoon 2002. J Earth Syst Sci 114:475–491 doi:10.1007/BF02702024

    Article  Google Scholar 

  • Smagorinsky J, Manabe S, Holloway JL (1965) Numerical results from a nine-level general circulation model of the atmosphere. Mon Weather Rev 93:727–768

    Article  Google Scholar 

  • Stramma L, Fischer J, Schott F (1996) The flow field off southwest India at 8N during the southwest monsoon of August 1993. J Mar Res 54:55–72 doi:10.1357/0022240963213448

    Article  Google Scholar 

  • Thadathil P, Gosh AK (1992) Surface layer temperature inversion in the Arabian Sea during winter. J Oceanogr 48:293–304 doi:10.1007/BF02233989

    Article  Google Scholar 

  • Yang H, Weisberg RH (1999) Response of the west Florida Shelf circulation to climatological wind stress forcing. J Geophys Res 104:5301–5320 doi:10.1029/1998JC900101

    Article  Google Scholar 

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Authors and Affiliations

  1. Centre for Atmospheric Sciences, IIT-Delhi, Hauz Khas, New Delhi, 1100016, India

    A. D. Rao & Madhu Joshi

  2. INCOIS, Ministry of Earth Sciences, Hyderabad, 500 055, India

    M. Ravichandran

Authors
  1. A. D. Rao
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  2. Madhu Joshi
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  3. M. Ravichandran
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Correspondence to A. D. Rao.

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Responsible Editor: Tal Ezer

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Rao, A.D., Joshi, M. & Ravichandran, M. Oceanic upwelling and downwelling processes in waters off the west coast of India. Ocean Dynamics 58, 213–226 (2008). https://doi.org/10.1007/s10236-008-0147-4

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  • DOI: https://doi.org/10.1007/s10236-008-0147-4

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