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Effect of ENSO Cycle on West Pacific Subtropical High and Drought/Flood in Fujian during Rainy Season

Wen Zhen-zhi

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Abstract

Relationship between the variations of West Pacific subtropical high indices in summer half year and North Pacific SST in the previous stage is examined based on data of 1951-2000.The correlation between the subtropical high indices and the preceding SST in equatorial East Pacific is the strongest among the areas with great persistency from preceding autumn to spring.It is indicated that ENSO events appeared about a half year earlier than the change of the subtropical high activities and that the subtropical high intensity enhanced(weakened) and west terminal point moved westward (eastward) in the year of El Nino (La Nina) event.The result shows that the distribution of rainfall during rainy season in Fujian is greatly affected by subtropical high activities, which in turn are restricted by ENSO.So it is of significance to pay attention to equatorial East Pacific SST and ENSO information for short-term climate prediction.

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What this paper is about

Relationship between the variations of West Pacific subtropical high indices in summer half year and North Pacific SST in the previous stage is examined based on data of 1951-2000.The correlation between the subtropical high indices and the preceding SST in equatorial East Pacific is the strongest among the areas with great persistency from preceding autumn to spring.It is indicated that ENSO events appeared about a half year earlier than the change of the subtropical high activities and that the subtropical high intensity enhanced(weakened) and west terminal point moved westward (eastward) in the year of El Nino (La Nina) event.The result shows that the distribution of rainfall during rainy season in Fujian is greatly affected by subtropical high activities, which in turn are restricted by ENSO.So it is of significance to pay attention to equatorial East Pacific SST and ENSO information for short-term climate prediction.

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Available abstract

Relationship between the variations of West Pacific subtropical high indices in summer half year and North Pacific SST in the previous stage is examined based on data of 1951-2000.The correlation between the subtropical high indices and the preceding SST in equatorial East Pacific is the strongest among the areas with great persistency from preceding autumn to spring.It is indicated that ENSO events appeared about a half year earlier than the change of the subtropical high activities and that the subtropical high intensity enhanced(weakened) and west terminal point moved westward (eastward) in the year of El Nino (La Nina) event.The result shows that the distribution of rainfall during rainy season in Fujian is greatly affected by subtropical high activities, which in turn are restricted by ENSO.So it is of significance to pay attention to equatorial East Pacific SST and ENSO information for short-term climate prediction.

Key concepts: Subtropical ridge, La Niña, Climatology, Subtropics, El Niño Southern Oscillation, Flood myth, North Pacific High, Wet season

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Effect of ENSO Cycle on West Pacific Subtropical High and Drought/Flood in Fujian during Rainy Season — Research Paper | ScholarLens