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dc.creatorBosart, Lance
dc.creatorNielsen, John
dc.date.accessioned2016-10-28T18:16:07Z
dc.date.available2016-10-28T18:16:07Z
dc.date.issued1993-06-01
dc.identifier.citationBosart, L. F., and J. W. Nielsen, 1993: Radiosonde penetration of an undilute cumulonimbus anvil. Mon. Wea. Rev., 121, 1688-1702.en_US
dc.identifier.urihttp://hdl.handle.net/1969.1/158214
dc.description© Copyright 1993 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act September 2010 Page 2 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC §108, as revised by P.L. 94-553) does not require the AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a web site or in a searchable database, or other uses of this material, except as exempted by the above statement, requires written permission or a license from the AMS. Additional details are provided in the AMS Copyright Policy, available on the AMS Web site located at (https://www.ametsoc.org/) or from the AMS at 617-227-2425 or copyrights@ametsoc.org.en_US
dc.description.abstractAn example is presented of the serendipitous radiosonde penetration through the western edge of a rapidly growing undilute cumulonimbus anvil above 200 mb by an operationally released radiosonde balloon. The sounding is supportive of deep convection and contains a stable layer (13°C potential temperature increase) from 210 to 185 mb with a quasi-adiabatic mixed layer from there to 135 mb. The 185–135-mb layer has a wet-bulb potential temperature of 24°C which agrees to within 1°C of the subcloud-layer wet-bulb potential temperature. The wind perturbation of approximately 30 m s−1 within the mixed layer is larger than, but consistent with, relative outflow velocities estimated from satellite imagery and density current theory. Downstream soundings through decaying anvil debris 12 h later still show evidence of the initial convective thermal perturbation even as the tropopause attempts to reform in the vicinity of 200 mb. Implications for the tropospheric-stratospheric exchange of water vapor and the measurement of water vapor at cold temperatures are discussed. The present operational practice of not reporting moisture data at high levels in the troposphere when the ambient temperature is less than −40°C deprives users of potentially useful moisture information.en_US
dc.description.sponsorshipNational Science Foundationen_US
dc.language.isoen_USen_US
dc.publisherAmerican Meteorological Societyen_US
dc.subjectstratosphere-troposphere exchangeen_US
dc.titleRadiosonde Penetration of an Undilute Cumulonimbus Anvilen_US
dc.typeArticleen_US
local.departmentAtmospheric Sciencesen_US
dc.identifier.doi10.1175/1520-0493(1993)121<1688:RPOAUC>2.0.CO;2


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