Reduction in the Tropical High Cloud Fraction in Response to an Indirect Weakening of the Hadley Cell
dc.contributor.author | Natchiar, SRM | |
dc.contributor.author | Webb, MJ | |
dc.contributor.author | Lambert, FH | |
dc.contributor.author | Vallis, GK | |
dc.contributor.author | Morcrette, CJ | |
dc.contributor.author | Holloway, CE | |
dc.contributor.author | Sergeev, DE | |
dc.contributor.author | Boutle, I | |
dc.date.accessioned | 2024-09-09T14:37:23Z | |
dc.date.issued | 2024-05-28 | |
dc.date.updated | 2024-09-09T14:19:59Z | |
dc.description.abstract | Tropical high cloud cover decreases with surface warming in most general circulation models. This reduction, according to the “stability-iris” hypothesis, is thermodynamically controlled and linked to a decrease in the radiatively-driven clear-sky convergence, when the peak anvil clouds rise because of the rising isotherms. The influence of the large-scale dynamical changes on the tropical high cloud fraction remains difficult to disentangle from the local thermodynamic influence, given that the mean meridional circulation remains inextricably tied to the local thermodynamic structure of the atmosphere. However, using idealized general circulation model simulations, we propose a novel method to segregate the dynamical impact from the thermodynamic impact on the tropical high cloud fraction. To this end, our investigation primarily focuses on the mechanisms underpinning changes in the high cloud cover in the deep tropics in response to extratropical surface warming, when the tropical sea surface temperatures remain invariant. Net convective detrainment of ice cloud condensates decreases at the peak detrainment region, without a rise in its altitude. We also find that the importance of depositional growth of ice cloud condensates in controlling the high cloud fraction response in the deep tropics varies with altitude. | en_GB |
dc.description.sponsorship | Met Office Hadley Centre Climate Programme | en_GB |
dc.description.sponsorship | Natural Environment Research Council (NERC) | en_GB |
dc.description.sponsorship | UKRI | en_GB |
dc.identifier.citation | Vol. 16(5), article e2023MS003985 | en_GB |
dc.identifier.doi | https://doi.org/10.1029/2023ms003985 | |
dc.identifier.grantnumber | NE/T006315/1 | en_GB |
dc.identifier.grantnumber | MR/T040866/1 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/137367 | |
dc.identifier | ORCID: 0000-0002-4664-1327 (Lambert, F Hugo) | |
dc.identifier | ORCID: 0000-0002-5971-8995 (Vallis, Geoffrey K) | |
dc.identifier | ORCID: 0000-0002-4240-8472 (Morcrette, Cyril J) | |
dc.identifier | ORCID: 0000-0001-8832-5288 (Sergeev, Denis E) | |
dc.language.iso | en | en_GB |
dc.publisher | Wiley / American Geophysical Union (AGU) | en_GB |
dc.relation.url | https://doi.org/10.5281/zenodo.8273593 | en_GB |
dc.rights | © 2024 Crown copyright and The Author(s). Journal of Advances in Modeling Earth Systems published by Wiley Periodicals LLC on behalf of American Geophysical Union. This article is published with the permission of the Controller of HMSO and the King's Printer for Scotland. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited | en_GB |
dc.title | Reduction in the Tropical High Cloud Fraction in Response to an Indirect Weakening of the Hadley Cell | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2024-09-09T14:37:23Z | |
exeter.article-number | e2023MS003985 | |
dc.description | This is the final version. Available on open access from Wiley via the DOI in this record | en_GB |
dc.description | Data Availability Statement: Simulation data for the figures are archived at https://doi.org/10.5281/zenodo.8273593 (Natchiar, 2023). We acknowledge the use of the following python libraries: Iris (Met Office, 2010–2013), pandas (The pandas development team, 2020; Wes McKinney, 2010), seaborn (Waskom, 2021), Matplotlib (Hunter, 2007), and aeolus (Sergeev & Zamyatina, 2023). | en_GB |
dc.identifier.eissn | 1942-2466 | |
dc.identifier.journal | Journal of Advances in Modeling Earth Systems | en_GB |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2024-04-25 | |
dcterms.dateSubmitted | 2023-08-30 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2024-05-28 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2024-09-09T14:20:03Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2024-09-09T14:37:31Z | |
refterms.panel | B | en_GB |
refterms.dateFirstOnline | 2024-05-28 |
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Except where otherwise noted, this item's licence is described as © 2024 Crown copyright and The Author(s). Journal of Advances in Modeling Earth Systems published by Wiley Periodicals LLC on behalf of American Geophysical Union. This article is published with the permission of the Controller of HMSO and the King's Printer for Scotland. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any
medium, provided the original work is properly cited