Physics
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3415707s&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 15, CiteID L15707
Physics
10
Atmospheric Processes: Clouds And Cloud Feedbacks, Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Atmospheric Processes: Radiative Processes, Atmospheric Processes: Remote Sensing, Atmospheric Processes: Tropical Meteorology
Scientific paper
We explore the daily evolution of tropical intraseasonal oscillations in satellite-observed tropospheric temperature, precipitation, radiative fluxes, and cloud properties. The warm/rainy phase of a composited average of fifteen oscillations is accompanied by a net reduction in radiative input into the ocean-atmosphere system, with longwave heating anomalies transitioning to longwave cooling during the rainy phase. The increase in longwave cooling is traced to decreasing coverage by ice clouds, potentially supporting Lindzen's ``infrared iris'' hypothesis of climate stabilization. These observations should be considered in the testing of cloud parameterizations in climate models, which remain sources of substantial uncertainty in global warming prediction.
Braswell William D.
Christy John R.
Hnilo Justin
Spencer Roy W.
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