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Enhanced positive water vapor feedback associated with tropical deep convection : new evidence from Aura MLS

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dc.contributor.author Su, Hui
dc.contributor.author Read, William G.
dc.contributor.author Jiang, Jonathan H.
dc.contributor.author Waters, Joe W.
dc.contributor.author Wu, Dong L.
dc.contributor.author Fetzer, Eric J.
dc.date.accessioned 2007-07-02T22:55:25Z
dc.date.available 2007-07-02T22:55:25Z
dc.date.issued 2006-03-11
dc.identifier.citation Geophysical Research Letters, Vol. 33, L05709, doi:10.1029/2005GL025505, 2006 en
dc.identifier.clearanceno 05-2733
dc.identifier.uri http://hdl.handle.net/2014/40309
dc.description.abstract Recent simultaneous observations of upper tropospheric (UT) water vapor and cloud ice from the Microwave Limb Sounder (MLS) on the Aura satellite provide new evidence for tropical convective influence on UT water vapor and its associated greenhouse effect. The observations show that UT water vapor increases as cloud ice water content increases. They also show that, when sea surface temperature (SST) exceeds ~300 K, UT cloud ice associated with tropical deep convection increases sharply with increasing SST. The moistening of the upper troposphere by deep convection leads to an enhanced positive water vapor feedback, about 3 times that implied solely by thermodynamics. Over tropical oceans when SST greater than ~300 K, the ‘convective UT water vapor feedback’ inferred from the MLS observations contributes approximately 65% of the sensitivity of the clear-sky greenhouse parameter to SST. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 631576 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher The American Geophysical Union en
dc.subject Microwave Limb Sounder (MLS) en
dc.subject Aura satellite en
dc.subject tropical convective influence en
dc.subject upper tropospheric (UT) en
dc.subject water vapor
dc.subject climate change
dc.title Enhanced positive water vapor feedback associated with tropical deep convection : new evidence from Aura MLS en
dc.type Article en


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