Decadal oscillation of spring rain in northern Taiwan

Chih Wen Hung*, Huang Hsiung Hsu, Mong Ming Lu

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

37 引文 斯高帕斯(Scopus)

摘要

This study found that the spring (February-April) rainfall in northern Taiwan has fluctuated concurrently with the Pacific Decadal Oscillation (PDO) since the early 20th century. It is proposed that this fluctuation in spring rain is induced by the tropical sea surface temperature (SST) anomaly embedded in the PDO, which has been known to oscillate in opposite phase to the SST in the extra-tropical North Pacific. When the PDO index is positive (negative), the SST over the tropical Central-Eastern Pacific is warmer (colder) than normal, and a low-level anti-cyclonic (cyclonic) anomalous flow is induced over the Philippine Sea. This anomalous anti-cyclonic (cyclonic) flow results in southwesterly (northeasterly) anomalous winds to the east of Taiwan and enhances (reduces) the trough extending southwestward from southern Japan to northern Taiwan. As a consequence, more (less) spring rain occurs in northern Taiwan during the positive (negative) PDO phases.

原文英語
頁(從 - 到)1-4
頁數4
期刊Geophysical Research Letters
31
發行號22
DOIs
出版狀態已發佈 - 2004 11月 28
對外發佈

ASJC Scopus subject areas

  • 地球物理
  • 地球與行星科學(全部)

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