A Statistical Analysis of the Influence of Deep Convection on Water Vapor Variability in the Tropical Upper Troposphere

dc.contributor.utaustinauthorFu, R.en_US
dc.creatorWright, J. S.en_US
dc.creatorFu, R.en_US
dc.creatorHeymsfield, A. J.en_US
dc.date.accessioned2016-10-28T19:53:02Z
dc.date.available2016-10-28T19:53:02Z
dc.date.issued2009en_US
dc.description.abstractThe factors that control the influence of deep convective detrainment on water vapor in the tropical upper troposphere are examined using observations from multiple satellites in conjunction with a trajectory model. Deep convection is confirmed to act primarily as a moisture source to the upper troposphere, modulated by the ambient relative humidity (RH). Convective detrainment provides strong moistening at low RH and offsets drying due to subsidence across a wide range of RH. Strong day-to-day moistening and drying takes place most frequently in relatively dry transition zones, where between 0.01% and 0.1% of Tropical Rainfall Measuring Mission Precipitation Radar observations indicate active convection. Many of these strong moistening events in the tropics can be directly attributed to detrainment from recent tropical convection, while others in the subtropics appear to be related to stratosphere-troposphere exchange. The temporal and spatial limits of the convective source are estimated to be about 36-48 h and 600-1500 km, respectively, consistent with the lifetimes of detrainment cirrus clouds. Larger amounts of detrained ice are associated with enhanced upper tropospheric moistening in both absolute and relative terms. In particular, an increase in ice water content of approximately 400% corresponds to a 10-90% increase in the likelihood of moistening and a 30-50% increase in the magnitude of moistening.en_US
dc.description.departmentEarth and Planetary Sciencesen_US
dc.description.sponsorshipNASA Global Energy and Water Cycle programen_US
dc.description.sponsorshipNASA Earth System Science researchen_US
dc.description.sponsorshipTerraen_US
dc.description.sponsorshipACRIMSAT NNG04GK90Gen_US
dc.identifierdoi:10.15781/T21G0HX6D
dc.identifier.citationWright, J. S., R. Fu, and A. J. Heymsfield. "A statistical analysis of the influence of deep convection on water vapor variability in the tropical upper troposphere." Atmos. Chem. Phys, Vol. 9, No. 15 (2009): 5847-5864.en_US
dc.identifier.doien_US
dc.identifier.issn1680-7316en_US
dc.identifier.urihttp://hdl.handle.net/2152/43323
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAtmospheric Chemistry and Physicsen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjecttrajectory analysisen_US
dc.subjectradar reflectivityen_US
dc.subjectrelative-humidityen_US
dc.subjecttrmmen_US
dc.subjectclimateen_US
dc.subjectairs/amsu/hsben_US
dc.subjectmicrophysicsen_US
dc.subjectsensitivityen_US
dc.subjectgreenhouseen_US
dc.subjecttransporten_US
dc.subjectmeteorology & atmospheric sciencesen_US
dc.titleA Statistical Analysis of the Influence of Deep Convection on Water Vapor Variability in the Tropical Upper Troposphereen_US
dc.typeArticleen_US

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