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Revisiting asymmetry for the decaying phases of El Niño and La Niña

Chen, W., Lu, R. and Dong, B. (2014) Revisiting asymmetry for the decaying phases of El Niño and La Niña. Atmospheric and Oceanic Science Letters, 7 (4). pp. 275-278. ISSN 1674-2834

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To link to this item DOI: 10.3878/j.issn.1674-2834.13.0091

Abstract/Summary

This study investigated the relationship between the asymmetry in the duration of El Ni?o and La Ni?a and the length of their decaying phases. The results suggested that the duration asymmetry comes from the long decaying ENSO cases rather than the short decaying ones. The evolutions of short decaying El Ni?o and La Ni?a are approximately a mirror image with a rapid decline in the following summer for the warm and cold events. However, a robust asymmetry was found in long decaying cases, with a prolonged and re-intensified La Ni?a in the following winter. The asymmetry for long decaying cases starts from the westward extension of the zonal wind anomalies in a mature winter, and is further contributed to by the air-sea interaction over the tropical Pacific in the following seasons.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Mathematical, Physical and Computational Sciences > NCAS
Faculty of Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:38298
Publisher:Institute of Atmospheric Physics, Chinese Academy of Science

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