El Niño, water vapor, and the Global Positioning System

Details El Niño, water vapor, and the Global Positioning System El Niño, water vapor, and the Global Positioning System

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.2697f&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 17, p. 2697-2700

Physics

4

Geodesy And Gravity: Space Geodetic Surveys, Global Change: Climate Dynamics, Global Change: Instruments And Techniques, Meteorology And Atmospheric Dynamics: Tropical Meteorology

Scientific paper

The 1997-1998 El Niño had a profound impact on atmospheric circulation in the tropical Pacific and affected weather patterns world-wide. Precipitable water estimates from Global Positioning System (GPS) sites in the western tropical Pacific capture the sudden onset of large-scale subsidence, a phenomenon proposed as a possible mechanism driving the eventual decline of El Niño episodes. The atmospheric drying associated with this anomalous high-pressure ridge and the turnabout as the warm episode transitions into the subsequent La Niña are clearly visible in the GPS observations.

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