Response of global subtropical highs to the equatorial eastern Pacific SST anomaly

Gong Daoyi; Wang Shaowu

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Gong Daoyi, Wang Shaowu. Response of global subtropical highs to the equatorial eastern Pacific SST anomaly[J]. Haiyang Xuebao, 1998, 20(5): 44-54.

Citation:

Gong Daoyi, Wang Shaowu. Response of global subtropical highs to the equatorial eastern Pacific SST anomaly[J]. Haiyang Xuebao, 1998, 20(5): 44-54.

Gong Daoyi, Wang Shaowu. Response of global subtropical highs to the equatorial eastern Pacific SST anomaly[J]. Haiyang Xuebao, 1998, 20(5): 44-54.

Citation:

Gong Daoyi, Wang Shaowu. Response of global subtropical highs to the equatorial eastern Pacific SST anomaly[J]. Haiyang Xuebao, 1998, 20(5): 44-54.

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Response of global subtropical highs to the equatorial eastern Pacific SST anomaly

Department of Geophysics, Peking University, Beijing 100871

Received Date: 1997-07-02
Rev Recd Date: 1997-10-07

Abstract

Abstract

Based on the reanalysis data of global 500 hPa geopotential height (NCEP-NCAR CDAS-1) and tropical Pacific SSTs, the characteristics of the global subtropical highs and their response to tropical eastern Pacific SST are investigated. Results show that the global subtropical highs respond to SST consistently. Subtropical high intensity correlates to the 3 months leading SST maximally. The relationships between SST and 500 hPa height stand out in low latitudes. The time for 500 hPa height reaching maximum correlation to SST is 2 months later in latitude of 100 and 9 months in latitude of 300 than equatorial zone. And the response of atmospheric circulation over extratropic performs as wave train, and the response is more significant in the condition of warmer SST. Persistence of SSTs and subtropical highs change obviously from season to season. Minimum persistence of subtrbpical highs in September and October may relate to the low persistence of SSTs in August and September.
- Global subtropical highs,
- equatorial eastern Pacific SST,

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References(16)

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