On the causal relationship between the Moist Diabatic Circulation and Cloud Rapid Adjustment to increasing CO₂

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dc.contributor.author Dinh, Tra en
dc.contributor.author Fueglistaler, S en
dc.date.accessioned 2020-01-08T00:00:25Z en
dc.date.issued 2019-11-08 en
dc.identifier.citation Journal of Advances in Modeling Earth Systems 22 pages 08 Nov 2019 en
dc.identifier.uri http://hdl.handle.net/2292/49381 en
dc.description.abstract General Circulation Models (GCMs) predict that clouds in the atmosphere rapidly adjust to the radiative perturbation of an abrupt increase in atmospheric CO₂ concentration on a short time scale of about 10 days. This rapid adjustment consists of an increase of clouds in the boundary layer and a decrease of clouds in the free troposphere. Our focus is the mechanism for the decrease of clouds in the free troposphere, which is the dominating component of cloud rapid adjustment in most GCMs. We propose that the decrease in clouds in the free troposphere arises from the causal relationship between the moist diabatic circulation and the production of condensates that forms clouds in moist processes. As CO₂ concentration increases, tropospheric radiative cooling is reduced, resulting in weakening of the moist diabatic circulation and a decrease in precipitation. As the hydrologic cycle weakens and the moist processes involving phase change of water vapour to form the condensates in the atmosphere lessen, the mass of cloud condensates decreases. This decrease in cloud condensates can be predicted from the decrease in the radiative subsidence mass flux, which is a metric for the strength of the moist diabatic circulation in the free troposphere. en
dc.description.uri https://catalogue.library.auckland.ac.nz/permalink/f/t37c0t/uoa_alma51228087690002091 en
dc.publisher American Geophysical Union (AGU) en
dc.relation.ispartofseries Journal of Advances in Modeling Earth Systems en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.rights.uri https://creativecommons.org/licenses/by/4.0/ en
dc.title On the causal relationship between the Moist Diabatic Circulation and Cloud Rapid Adjustment to increasing CO₂ en
dc.type Journal Article en
dc.identifier.doi 10.1029/2019MS001853 en
dc.rights.holder Copyright: The authors en
pubs.author-url https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019MS001853 en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en
pubs.subtype Article en
pubs.elements-id 785883 en
pubs.org-id Science en
pubs.org-id Physics en
dc.identifier.eissn 1942-2466 en
pubs.record-created-at-source-date 2019-11-13 en
pubs.online-publication-date 2019-11-08 en


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https://creativecommons.org/licenses/by/4.0/ Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by/4.0/

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