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

N. Sato; H. Tokinaga; R. Shirooka; N. Suginohara

doi:10.1029/2006GL025997

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

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

Research output: Contribution to journal › Article › peer-review

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 language	English
Article number	L14608
Journal	Geophysical Research Letters
Volume	33
Issue number	14
DOIs	https://doi.org/10.1029/2006GL025997
Publication status	Published - Jul 2006
Externally published	Yes

All Science Journal Classification (ASJC) codes

Geophysics
Earth and Planetary Sciences(all)

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10.1029/2006GL025997

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

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.",

author = "N. Sato and H. Tokinaga and R. Shirooka and N. Suginohara",

year = "2006",

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doi = "10.1029/2006GL025997",

language = "English",

volume = "33",

journal = "Geophysical Research Letters",

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publisher = "American Geophysical Union",

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T1 - Influence of mechanical mixing on a low summertime SST in the western North Pacific ITCZ region

AU - Sato, N.

AU - Tokinaga, H.

AU - Shirooka, R.

AU - Suginohara, N.

PY - 2006/7

Y1 - 2006/7

N2 - 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.

AB - 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.

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

Abstract

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