An ENSO signal in the North Atlantic subtropical area

Authors
Gallego, D Garcia, R Hernandez, E Gimeno, L Ribera, P
Citation
D. Gallego et al., An ENSO signal in the North Atlantic subtropical area, GEOPHYS R L, 28(15), 2001, pp. 2939-2942
Citations number
12
Categorie Soggetti
Earth Sciences
Journal title
GEOPHYSICAL RESEARCH LETTERS
ISSN journal
00948276 → ACNP
Volume
28
Issue
15
Year of publication
2001
Pages
2939 - 2942
Database
ISI
SICI code
0094-8276(20010801)28:15<2939:AESITN>2.0.ZU;2-W
Abstract
Precipitation in the Canary Islands is studied from a synoptic point of vie w for the 1955-1998 period, using data from the NCEP-NCAR reanalysis. The u se of automatic objective techniques allows the identification of five patt erns leading to precipitation in the area. The influence of intense El Ni ( n) over tildeo and La Ni (n) over tildea events on these patterns is then s tudied. The results show that La Ni (n) over tildea conditions are characte rized by more intense and frequent precipitation episodes as result of deep er and more frequent geopotential anomalies at the 500 hPa level.