Anomalous eastward displacement of the western tropical Pacific warm pool and warming of the eastern tropical Pacific

Long Baosen; Li Bocheng; Zou Emei

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Long Baosen, Li Bocheng, Zou Emei. Anomalous eastward displacement of the western tropical Pacific warm pool and warming of the eastern tropical Pacific[J]. Haiyang Xuebao, 1998, 20(2): 35-42.

Citation:

Long Baosen, Li Bocheng, Zou Emei. Anomalous eastward displacement of the western tropical Pacific warm pool and warming of the eastern tropical Pacific[J]. Haiyang Xuebao, 1998, 20(2): 35-42.

Long Baosen, Li Bocheng, Zou Emei. Anomalous eastward displacement of the western tropical Pacific warm pool and warming of the eastern tropical Pacific[J]. Haiyang Xuebao, 1998, 20(2): 35-42.

Citation:

Long Baosen, Li Bocheng, Zou Emei. Anomalous eastward displacement of the western tropical Pacific warm pool and warming of the eastern tropical Pacific[J]. Haiyang Xuebao, 1998, 20(2): 35-42.

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Anomalous eastward displacement of the western tropical Pacific warm pool and warming of the eastern tropical Pacific

First Institute of Oceanography, State Oceanic Administration, Qingdao 266003

Received Date: 1996-08-30
Rev Recd Date: 1997-04-02

Abstract

Abstract

Based on the data from the Climate Diagnostics Bulletin,Oceanographic Monthly Summary,UH Sea Level Center and T()GA-CUARE IUP.the response of warm pool in the western tropical Pacific and the eastern tropital Pacific SST to the anomalous wind field during 1992/1993 El Nino has been analyzed.The recults show that the eastward transport of warm water of the western tropical Pacific due to the westerly wind burst leads nor only to a drop of sea level but also to a rise of thermocline in the western tropical Pacific.Conseyuently the heat content in upper layer water decreasese especially in the thermocline.Contrary to this,the positive anomalies of heat content and thermocline depth appear in the eastern tropical Pacific.The positive anomalies in the eastern Pacific lag the negative ones in the western Pacific by two months;The anomalous eastward shift of warm pool (2℃ isotherm) is a direct response of ocean current to westerly wind anomalies in low-level atmosphere;Quantitative calculations show that the thermal advection caused by anomalous ocean current is the main force of anomalous eastward displacement of the warm pool (28℃ isotherm) and the one of main causes for anomalous warming of the eastern tropical Pacific.
- Warm pool,
- westerly wind burst,
- thermal advection,
- warming,
- EI Nino

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References(13)

References

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