Importance of pre-existing oceanic conditions to upper ocean response induced by Super Typhoon Hai-Tang

Details Importance of pre-existing oceanic conditions to upper ocean response induced by Super Typhoon Hai-Tang Importance of pre-existing oceanic conditions to upper ocean response induced by Super Typhoon Hai-Tang

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3520603z&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 20, CiteID L20603

Physics

5

Oceanography: Physical: Air/Sea Interactions (0312, 3339), Oceanography: General: Remote Sensing And Electromagnetic Processes (0689, 2487, 3285, 4455, 6934), Oceanography: Physical: Upper Ocean And Mixed Layer Processes

Scientific paper

This study investigates upper ocean response to Super Typhoon Hai-Tang, the most intense typhoon in 2005, in the western North Pacific using multi-satellite microwave data, typhoon data and Argo profiles. Sequential merged microwave sea surface temperature (SST) images show that Hai-Tang induced four separately cooling responses after its trail in the western North Pacific during 11-18 July. Comparison between upper ocean responses of cooling SST and pre-typhoon sea surface height suggests that these cooling responses of the upper ocean to Hai-Tang are closely associated with pre-existing cyclonic circulation denoted by pre-existing negative sea surface features. Furthermore, applying Argo profiles, the physical mechanism is confirmed to be associated with pre-existing cyclonic circulations provide a relatively unstable thermodynamic structure, and therefore cold water would be brought up readily. This paper provides the rather convincing evidence that cyclonic flow and uplifted thermocline are the pre-existing conditions for intensive cooling following the typhoon passage.

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