Tropical origins for recent and future Northern Hemisphere climate change

Details Tropical origins for recent and future Northern Hemisphere climate change Tropical origins for recent and future Northern Hemisphere climate change

Nov 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3121205s&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 21, CiteID L21205

Physics

35

Global Change: Atmosphere (0315, 0325), Global Change: Climate Dynamics (3309), Meteorology And Atmospheric Dynamics: General Circulation, Meteorology And Atmospheric Dynamics: Ocean/Atmosphere Interactions (0312, 4504)

Scientific paper

Results from a large ensemble of climate model simulations over the period 1940-2080 suggest that the observed strengthening of the westerly winds over the North Atlantic during the past decades is not due to the enhanced greenhouse effect but is largely an expression of a random, internal climate variation driven by increased precipitation over the tropical Indian Ocean. Instead, the enhanced greenhouse effect drives a change in the extra-tropical winter circulation through intensified precipitation over the tropical West Pacific. This change is characterized by a wave train encompassing the whole Northern hemisphere, a pattern known as the Circumglobal Waveguide Pattern.

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