Spatial and temporal features of ENSO meridional scales

被引：51

作者：

Zhang, Wenjun ^{[1
,3
]}

Li, Jianping ^{[1
]}

Jin, Fei-Fei ^{[2
]}

机构：

[1] Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Sci & Geophys Fluid Dynam, Beijing 100029, Peoples R China

[2] Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Honolulu, HI 96822 USA

[3] Nanjing Univ Informat Sci & Technol, Coll Atmospher Sci, Nanjing, Peoples R China

来源：

GEOPHYSICAL RESEARCH LETTERS | 2009年 / 36卷

基金：

美国国家科学基金会;

关键词：

OCEAN RECHARGE PARADIGM; TROPICAL PACIFIC-OCEAN; EL-NINO; DECADAL VARIABILITY; INTERANNUAL VARIABILITY; SOUTHERN-OSCILLATION; EQUATORIAL PACIFIC; COUPLED MODEL; WAVE DYNAMICS;

D O I：

10.1029/2009GL038672

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The spatial and temporal features of the El Nino/Southern Oscillation (ENSO) meridional scales are investigated using the Hadley Center Global Sea Ice and Sea Surface Temperature (HadISST) data for the period of 1950-2007. The results show that the meridional scales of the ENSO warm and cold events are asymmetric and exhibit interdecadal changes. The meridional extent of the sea surface temperature anomalies (SSTA) during La Nina years is wider than that during El Nino years. This is because strengthened trades and thus strengthened upwelling and meridional currents during La Nina events more effectively spread SSTA away from the equator. With the Walker Circulation weakening in recent decades, which tends to reduce upwelling and meridional currents over the central and eastern equatorial Pacific, the meridional scales of both El Nino and La Nina events also decrease. Citation: Zhang, W., J. Li, and F.-F. Jin (2009), Spatial and temporal features of ENSO meridional scales, Geophys. Res. Lett., 36, L15605, doi:10.1029/2009GL038672.

引用

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