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Journal of Tropical Oceanography >

2009 , Vol. 28 >Issue 5: 66 - 74

DOI: https://doi.org/10.11978/j.issn.1009-5470.2009.05.066

Marine physics

Seasonal variability of salinity budget in the southeastern Arabian Sea

  • ZHANG Yu-hong ,
  • XU Hai-ming ,
  • DU Yan ,
  • WANG Dong-xiao
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  • 1．College of Atmospheric Sciences，Nanjing University of Information Science and Technology，Nanjing 210044，China；2．Key Laboratory of Tropical Marine Environmental Dynamic，South China Sea Institute of Oceanology， CAS，Guangzhou 510301，China

Received date: 2009-04-28

  Revised date: 2009-06-08

  Online published: 2009-10-10

Supported by

科学院知识创新工程项目（KZCX2-YW-BR-04；LYQY200807；KZCX2-YW-214；KZCX2-YW-Q11-02）

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Abstract

Based on the monthly mean data of Simple Ocean Data Assimilation (SODA) product, the authors analyze the seasonal salinity budget of surface layer in the southeastern Arabian Sea., The salinity variation in the region cannot be explained by surface freshwater flux. The salinity budgets in two typical regions show that horizontal advection dominates salinity variation, decreasing the salinity in winter and increasing it in summer, except for the coastal region off western India where the surface freshwater flux decreases salinity in summer. During winter, the northeast monsoon current advects fresher water from the Bay of Bengal into the Arabian Sea along the same latitude and then transports the low saline-water northward, resulting in salinity reduction in the surface layer of the southeastern Arabian Sea. During summer, southwest monsoon current advects high-salinity water in the northwestern Arabian Sea southeastward, increasing the salinity in the surface layer of the southeastern Arabian Sea. In the southeastern Arabian Sea, salinity variation of the surface layer is prominently stronger in winter than in summer.

Key words： southeastern Arabian Sea; salinity budget; seasonal variation; freshwater flux; horizontal advection

Cite this article

ZHANG Yu-hong , XU Hai-ming , DU Yan , WANG Dong-xiao . Seasonal variability of salinity budget in the southeastern Arabian Sea[J]. Journal of Tropical Oceanography, 2009 , 28(5) : 66 -74 . DOI: 10.11978/j.issn.1009-5470.2009.05.066

References

[1]  SCHOTT F A, XIE S P, MCCREARY JR J P. Indian Ocean circulation and climate variability [J]. Rev Geophys, 2009,47, RG1002, doi:10.1029/2007RG000245.
[2]  SEETARAMAYYA P, MASTER A. Observed air-sea interface conditions and a monsoon depression during MONEX-79[J]. Archives Meteoro, Geophys, Bioclimatol, 1984, 33: 61—67.
[3]  BRUCE J G, JOHNSON D R, KINDLE J C. Evidence for eddy formation in the eastern Arabian Sea during the northeast monsoon [J]. J Geophys Res, 1994, 99: 7651—7664.
[4]  BRUCE J G, KINDLE J C, KANTHA L H et al. Recent observations and modeling in the Arabian Sea Laccadive High region [J]. J Geophys Res, 1998, 103: 7593—7600.
[5]  SHANKAR D, SHETYE S R. On the dynamics of the Lakshadweep high and low in the southeastern Arabian Sea [J]. J Geophys Res, 1997, 102: 12551—12567.
[6]  RAO R R, SIVAKUMAR R. On the possible mechanisms of the evolution of a mini warm pool during the pre-summer monsoon season and the genesis of onset vortex in the southern Arabian Sea [J]. Q J R Meteorol Soc, 1999, 125: 787—809.
[7]  SHENOI S S C, SHANKA D, SHETYE S R. On the sea surface temperature high in the Lakshadweep Sea before the onset on the southwest monsoon [J]. J Geophys Res, 1999,104: 15703—15712.
[8]  SANILKUMAR K V, HAREESH KUMAR P V, JOSSIA JOSEPH et al . Arabian Sea mini warm pool during May 2000 [J]. Cur Sci, 2004, 86: 101—105.
[9]  XIE S P, XU H, SAJI N H, et al. Role of narrow mountains in large-scale organization of Asian monsoon convection [J]. J Climate, 2006, 19: 3420—3429.
[10]  刘琳, 于卫东, 刁新源,等. 热带印度洋偶极子事件期间印度洋大气的变化——大气流函数场和势函数场的分析[J]. 大气科学, 2008, 32 (5) :1083—1093.
[11]  李崇银, 穆明权. 赤道印度洋海温偶极子型振荡及其气候影响[J]. 大气科学, 2001 , 25 (4) : 433—443.
[12]  梁肇宁, 温之平, 吴丽姬. 印度洋海温异常和南海夏季风建立迟早的关系I. 耦合分析[J]. 大气科学, 2006 , 30 (4) : 619—634.
[13]  XIE P, ARKIN P A. Analyses of global monthly precipitation using gauge observations, satellite estimates, and numerical model predictions [J]. J Climate, 1996, 9: 840—858.
[14]  YU L, WELLER R A, Sun B. Improving latent and sensible heat flux estimates for the Atlantic Ocean (1988-1999) by a synthesis approach [J]. J Climate, 2004, 17: 373—393.
[15]  FENG M, HACKER P, LUKAS R. Upper ocean heat and salt balances in response to a westerly wind burst in the western equatorial Pacific during TOGA COARE [J]. J Geophys Res, 1998, 103(C5): 10289—10311.
[16]  BANSE K. Hydrography of the Arabian Sea Shelf of India and Pakistan and effects on demersal fishes [J]. Deep-Sea Res. Oceanogr Abstr, 1968, 15: 45—48.
[17]  GOPALAKRISHNA V V, JOHNSON Z, SALGAONKAR G, et al. Observed variability of sea surface salinity and thermal inversions in the Lakshadweep Sea during contrast monsoons [J]. Geophys Res Lett, 2005, 32, L18605, doi:10.1029/2005GL023280.
[18]  RAO R R, SIVAKUMAR R. Seasonal variability of sea surface salinity and salt budget of the mixed layer of the north Indian Ocean [J]. J Geophys Res, 2003,108, 3009, doi:10.1029/2001JC000907.
[19]  DARBYSHIRE M. The surface waters off Kerala, south-west India [J]. Deep-Sea Res, 1967, 14: 295—320.
[20]  SHETYE S R, GOUVEIA A D, SHENOI S S C, et al. The coastal current of western India during the northeast monsoon [J]. Deep-Sea Res Part A, 1991, 38: 1517—1529.
[21]  SHANKAR D, GOPALAKRISHNA V V, SHENOI S S C, et a., Observational evidence for westward propagation of temperature inversions in the southeastern Arabian Sea[J]. Geophys Res Lett, 2004, 31, doi:10.1029/2004GL019652
[22]  GOPALAKRISHNA V V, JOHNSON Z, SALGAONKAR G, et al. Observed variability of sea surface salinity and thermal inversions in the Lakshadweep Sea during contrast monsoons [J]. Geophys Res Lett, 2005, 32, doi: 10.1029/ 2005GL023280.

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