Tropical Pacific link to the two dominant patterns of atmospheric variability

Details Tropical Pacific link to the two dominant patterns of atmospheric variability Tropical Pacific link to the two dominant patterns of atmospheric variability

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3203801l&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 3, CiteID L03801

Physics

13

Global Change: Climate Dynamics (0429, 3309), Atmospheric Processes: Climatology (1616, 1620, 3305, 4215, 8408), Atmospheric Processes: General Circulation (1223), Atmospheric Processes: Ocean/Atmosphere Interactions (0312, 4504)

Scientific paper

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.

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