Premium
Tropical Pacific link to the two dominant patterns of atmospheric variability
Author(s) -
Lin Hai,
Derome Jacques,
Brunet Gilbert
Publication year - 2005
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2004gl021495
Subject(s) - extratropical cyclone , climatology , walker circulation , atmospheric circulation , environmental science , tropical cyclone , convection , atmospheric sciences , sea surface temperature , general circulation model , boreal , geology , climate change , oceanography , meteorology , geography , paleontology
Using the NCEP/NCAR global reanalysis data for 51 boreal winters, a convective index (CI) for the tropical Pacific is constructed. It is found that the extreme positive and negative events of the CI are connected to the positive phases of the two dominant modes of the extratropical atmospheric variability, i.e., the PNA and the NAO, respectively. The same analysis is applied to the output of a 201‐year integration of a global air‐sea coupled general circulation model. Results consistent with the observations are obtained.