Spatial-temporal variation and mechanism associated with mini-cold pool off the southern tip of India during summer and winter monsoon season

Rao, A. D.; Mahapatra, D. K.; Babu, S. V.; Pandey, Smita
July 2012
Water Quality Research Journal of Canada (IWA Publishing);2012, Vol. 47 Issue 3/4, p333
Academic Journal
Sea surface temperature (SST) from different sources suggests that the occurrence of a mini-cold pool (MCP) off the southern tip of India (STI) is a persistent phenomenon which occurs during both the summer and the winter monsoon seasons. However, the associated mechanism is different in both scenarios and, hence, numerical experiments are conducted to study and ascertain the mechanism. The dynamics that govern the occurrence of MCP during the summer season is mainly due to upwelling, caused by the divergence in the near-surface circulation off STI, advection of the cold upwelled water from the western Arabian Sea and the southwest coast of India. In contrast, during the winter monsoon, the model studies suggest that circulations driven by positive Ekman dynamics and outgoing heat flux are mainly responsible for the formation of MCP off STI during December-February. The cold water intrusion in both seasons occurs in accordance with the monsoon and coastal currents, which underlines the importance of advection. The position and extent of cooling differs during both seasons because wind stress varies significantly.


Related Articles

  • Sea surface temperature variability in the northern Benguela upwelling system, and implications for fisheries research. Cole, J.; Villacastin, C. // International Journal of Remote Sensing;05/20/2000, Vol. 21 Issue 8, p1597 

    Variability of sea surface temperature (SST) in the northern Benguela was studied using a time-series of mean weekly SST images from 1981 to 1990. Mean SST, standard deviation (SD) and coefficient of variation (CV) maps were generated to investigate general temporal trends; charts of mean...

  • Autocorrelation Scales of the SST Distribution and Water Masses Stratification in the Channel of Sicily. Borzelli, Gianluca; Ligi, Roberto // Journal of Atmospheric & Oceanic Technology;Jun99, Vol. 16 Issue 6, p776 

    A 1-yr-long series of Advanced Very High Resolution Radiometer sea surface temperature (SST) images is used to study the SST distribution in 1992 over the Channel of Sicily. Time- and spatial scales of the SST are studied by estimating the SST autocorrelation function directly from satellite...

  • Reductions in Strong Upwelling‐Favorable Wind Events in the Pliocene. Li, Zhiyuan; Luo, Yangcheng; Arnold, Nathan; Tziperman, Eli // Paleoceanography & Paleoclimatology;Dec2019, Vol. 34 Issue 12, p1931 

    Proxy records of the Pliocene show significant warm anomalies of sea surface temperatures (SST) near midlatitude upwelling sites at the eastern boundaries of the Pacific and Atlantic Oceans. Weaker upwelling‐favorable mean winds or a deeper thermocline have been proposed as explanations,...

  • Typhoon-enhanced upwelling and its influence on fishing activities in the southern East China Sea. Chang, Yi; Chan, Jui-Wen; Huang, Yuan-Chao Angelo; Lin, Wei-Quan; Lee, Ming-An; Lee, Kuo-Tien; Liao, Cheng-Hsin; Wang, Kae-Yih; Kuo, Yi-Chun // International Journal of Remote Sensing;Sep2014, Vol. 35 Issue 17, p6561 

    Ocean–atmosphere interactions before and after the passage of Typhoons Haitang, Fung-wong, and Morakot across the southern region of the East China Sea (ECS) were examined by assessing satellite measurements of sea surface temperature (SST) and chlorophyll-a (chl-a) concentration in...

  • Processes of 30-90 days sea surface temperature variability in the northern Indian Ocean during boreal summer. Vialard, J.; Jayakumar, A.; Gnanaseelan, C.; Lengaigne, M.; Sengupta, D.; Goswami, B. // Climate Dynamics;May2012, Vol. 38 Issue 9/10, p1901 

    During summer, the northern Indian Ocean exhibits significant atmospheric intraseasonal variability associated with active and break phases of the monsoon in the 30-90 days band. In this paper, we investigate mechanisms of the Sea Surface Temperature (SST) signature of this atmospheric...

  • Variations in Ocean Surface Temperature due to Near-Surface Flow: Straining the Cool Skin Layer. Wells, Andrew J.; Cenedese, Claudia; Farrar, J. Thomas; Zappa, Christopher J. // Journal of Physical Oceanography;Nov2009, Vol. 39 Issue 11, p2685 

    The aqueous thermal boundary layer near to the ocean surface, or skin layer, has thickness O(1 mm) and plays an important role in controlling the exchange of heat between the atmosphere and the ocean. Theoretical arguments and experimental measurements are used to investigate the dynamics of the...

  • Cold Water Flow and Upper-Ocean Currents in the Bismarck Sea from December 2001 to January 2002. Hasegawa, Takuya; Ando, Kentaro; Sasaki, Hideharu // Journal of Physical Oceanography;Apr2011, Vol. 41 Issue 4, p827 

    The authors investigated the upper-ocean currents in the Bismarck Sea and related oceanic thermal changes in the western equatorial South Pacific for December 2001--January 2002; during this period, coastal upwelling occurred along the Papua New Guinea (PNG) coast. Southeastward and...

  • Characterization of the Boreal Summer Upwelling at the Northern Coast of the Gulf of Guinea Based on the PROPAO In Situ Measurements Network and Satellite Data. Kouadio, Yves K.; Djakouré, Sandrine; Aman, Angora; Ali, K. Eugène; Koné, Vamara; Toualy, Elisée // International Journal of Oceanography;2013, p1 

    The boreal summer upwelling along the northern coast of the Gulf of Guinea (GG) is characterized using new in situ sea surface temperature (SST) from onset sensor and satellite TRMM Micro wave Imager (TMI) datasets. This study aims to encourage intensive in situ SST measurements at the northern...

  • Synoptic conditions governing upwelling along the Polish Baltic coast. BEDNORZ, EWA; PÓLROLNICZAK, MAREK; CZERNECKI, BARTOSZ // Oceanologia;2013, Vol. 55 Issue 4, p767 

    The study analyses atmospheric feedback to the occurrence of upwelling along the Polish Baltic coast. Upwelling events were identified on the basis of daily mean sea surface temperature (SST) maps from the period 1982-2010 derived from the NOAA OI SST V2 High Resolution Dataset. Synoptic...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics