ENSO related modulation of coastal upwelling in the eastern Atlantic

Authors
Citation
C. Roy et C. Reason, ENSO related modulation of coastal upwelling in the eastern Atlantic, PROG OCEAN, 49(1-4), 2001, pp. 245-255
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Earth Sciences
Journal title
PROGRESS IN OCEANOGRAPHY
ISSN journal
0079-6611 → ACNP
Volume
49
Issue
1-4
Year of publication
2001
Pages
245 - 255
Database
ISI
SICI code
0079-6611(2001)49:1-4<245:ERMOCU>2.0.ZU;2-Z
Abstract
An index of ENSO in the Pacific during early boreal winter is shown to acco unt for a significant part of the variability of coastal SST anomalies meas ured a few months later within the wind driven West African coastal upwelli ng region from 10 degreesN to 26 degreesN. This teleconnection is thought t o result from an atmospheric bridge between the Pacific and Atlantic oceans , leading to warm (cold) ENSO events being associated with a relaxation (in tensification) of the Atlantic trade winds and of the wind-induced coastal upwelling. This ENSO related modulation of the wind-driven coastal upwellin g appears to contribute to the connection observed at the basin-scale betwe en ENSO and SST in the north Atlantic. The ability to use this teleconnecti on to give warnings of large changes in the West African upwelling several months in advance is successfully tested using data from the 1998 and 1999 ENSO events. (C) 2001 Elsevier Science Ltd. All rights reserved.