Tracking shallow convective mixing and its influence on low-level clouds with stable water isotopes in vapor

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dc.contributor.authorHu, Jun
dc.contributor.authorBailey, Adriana
dc.contributor.authorNusbaumer, Jesse
dc.contributor.authorDee, Sylvia
dc.contributor.authorSasser, Christiana
dc.contributor.authorWorden, John
dc.date.accessioned2022-03-18T15:19:04Z
dc.date.available2022-03-18T15:19:04Z
dc.date.issued2022-02-17
dc.description.abstractLow-cloud feedbacks contribute large uncertainties to climate projections and estimated climate sensitivity. A key physical process modulating low-cloud feedbacks is shallow convective mixing between the boundary layer and the free troposphere. However, there are challenges in acquiring observational constraints of shallow convective mixing with global coverage. To this end, we propose a novel approach to constraining convective mixing using stable water vapor isotope profiles from satellite retrievals. We demonstrate that the vertical gradient of water vapor δD between the boundary layer and free troposphere can be used to track shallow convective mixing. Analyzing isotopes in water vapor alongside low-cloud properties from satellite retrievals, we find that low-cloud fraction appears largely insensitive to convective mixing in shallow cumulus regions. Our results also suggest that strong shallow convective mixing is associated with the moistening of the free troposphere. The new estimate of shallow convective mixing and its relationship with low-cloud properties offers a potential constraint on simulations of low-cloud feedbacks and estimates of climate sensitivity.en_US
dc.description.sponsorshipWe thank two anonymous reviewers for their constructive comments. This work was funded by NASA ROSES: Weather and Atmospheric Dynamics (NNH19ZDA001N-ATDM). This material is based upon work supported by the National Center for Atmospheric Research, which is a major facility sponsored by the National Science Foundation under Cooperative Agreement 1852977. Part of the research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.en_US
dc.description.urihttps://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2021JD035355en_US
dc.format.extent13 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m20h1a-j1x4
dc.identifier.citationHu, J., Bailey, A., Nusbaumer, J., Dee, S., Sasser, C., & Worden, J. (2022). Tracking shallow convective mixing and its influence on low-level clouds with stable water isotopes in vapor. Journal of Geophysical Research: Atmospheres, 127, e2021JD035355. https://doi.org/10.1029/2021JD035355en_US
dc.identifier.urihttps://doi.org/10.1029/2021JD035355
dc.identifier.urihttp://hdl.handle.net/11603/24403
dc.language.isoen_USen_US
dc.publisherAGUen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Mechanical Engineering Department Collection
dc.relation.ispartofUMBC Staff Collection
dc.rightsThis is a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleTracking shallow convective mixing and its influence on low-level clouds with stable water isotopes in vaporen_US
dc.typeTexten_US

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