INFLUENCE ON NORTHERN PACIFIC STORM TRACK OF EQUATO-RIAL CENTRAL AND EASTERN PACIFIC SSTA DURING WIN

• 作 者: 朱伟军rrrrrrrrrn 孙照渤rrrrrrrrrn 闵锦忠rrrrrrrrrn 彭加毅
• 出 处: Journal of Tropical Meteorology
• 发表日期: 2000年01期
• 关键词: SSTA storm concurrent equatorial interannual winter tropical eastern ENSO filter

Singular value decomposition (SVD) is conducted of 15 winter tropical Pacific SST with 500 hPa filtered potential height variance over the northern Pacific storm track. It is shown that the first coupled mode obtained depicts the effect on the track of SSTA over equatorial central and eastern Pacific. Further com-posite analysis indicates that the SSTA over there during winter can give rise to or invigorate PNA teleconnec-tion response pattern in 500 hPa height field which, in turn, exerts crucial influence on the interannual variabil-ity in vigor and east-west displacement of the Pacific storm track, especially over its central and eastern part.

Singular value decomposition (SVD) is conducted on 15 winter tropical Pacific SST with 500 hPa filtered potential height variance over the northern Pacific storm track. It is shown that the first coupled mode was captured on effect of the track of SSTA over equatorial central and eastern Pacific. Further com-posite analysis indicates that the SSTA over there during winter can give rise to or invigorate PNA teleconnection-response pattern in 500 hPa height field which, in turn, exerts crucial influence on the interannual variabil-ity in vigor and east -west displacement of the Pacific storm track, especially over its central and eastern part.