Influence of mechanical mixing on a low summertime SST in the western North Pacific ITCZ region

N. Sato, Hiroki Tokinaga, R. Shirooka, N. Suginohara

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A region with a low sea-surface temperature (SST) was identified in the western North Pacific (WNP) Intertropical Convergence Zone (ITCZ) or warm water pool region in boreal summer. The SST decreases by up to 0.5°C from May to the June-July-August (JJA) season just east of Mindanao Island. Analyses of the observed data indicated that a northeastward surface current constantly exists throughout the year, supplying cold subsurface water through the Molucca Strait. As a result, the subsurface water is colder by several degrees compared with that in the surrounding regions. The sea-surface wind is strong over this region in the JJA season. Examination of Argo float data demonstrated that the mixed layer becomes deeper from May to the JJA season. It is suggested that the strong wind causes vertical mixing between the surface and subsurface layers, resulting in the low summertime SST.

Original languageEnglish
Article numberL14608
JournalGeophysical Research Letters
Volume33
Issue number14
DOIs
Publication statusPublished - Jul 1 2006

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sea surface temperature
intertropical convergence zone
cold water
straits
floats
supplying
Argo
summer
surface layers
vertical mixing
examination
warm water
surface wind
mixed layer
strait
sea surface
causes
water

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Influence of mechanical mixing on a low summertime SST in the western North Pacific ITCZ region. / Sato, N.; Tokinaga, Hiroki; Shirooka, R.; Suginohara, N.

In: Geophysical Research Letters, Vol. 33, No. 14, L14608, 01.07.2006.

Research output: Contribution to journalArticle

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