Maybee, B. orcid.org/0000-0001-7834-9489, Marsham, J., Klein, C. M. et al. (7 more authors) (2024) Wind shear effects in convection–permitting models influence MCS rainfall and forcing of tropical circulation. Geophysical Research Letters, 51 (17). e2024GL110119. ISSN 0094-8276
Abstract
Mesoscale Convective Systems (MCSs) play a critical role in tropical rainfall patterns and circulations. To reduce persistent biases and improve understanding of the climate system, international groups have called for unprecedented investment in global convection–permitting (CP) climate models. It is essential such models accurately represent MCSs, and in particular environmental interactions such as dynamical control by wind shear. We show that in representative current generation CP simulations, MCS updraft entrainment decreases with shear, leading to a realistic increase of extreme rainfall. We find the control of environmental shear extends to mean storm rainfall and anvil heights. The simulation of these effects depends strongly on model physics in both CP and parameterized models. We show that in West Africa, MCS shear response influences the zonal distribution of storm diabatic heating, modifying upscale impacts of convection. Our results demonstrate key tests for focused process–based assessment of CP model fidelity.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 Crown copyright and The Author(s). 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-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst for Climate & Atmos Science (ICAS) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 29 Aug 2024 08:48 |
Last Modified: | 11 Sep 2024 14:16 |
Published Version: | https://agupubs.onlinelibrary.wiley.com/doi/full/1... |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1029/2024GL110119 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:216553 |