Howard, E., Woolnough, S., Klingaman, N. et al. (5 more authors) (2024) Evaluation of multi-season convection-permitting atmosphere – mixed-layer ocean simulations of the Maritime Continent. Geoscientific Model Development, 17 (9). pp. 3815-3837. ISSN 1991-959X
Abstract
A multi-season convection-permitting regional climate simulation of the Maritime Continent (MC) using the Met Office Unified Model (MetUM) with 2.2 km grid spacing is presented and evaluated. The simulations pioneer the use of atmosphere–ocean coupling with the multi-column K profile parametrisation (KPP) mixed-layer ocean model in atmospheric convection-permitting climate simulations. Comparisons are made against a convection-parametrised simulation in which it is nested and which in turn derives boundary conditions from the ERA5 reanalysis. This paper describes the configuration, performance of the mean state and variability in the two simulations compared against observational datasets. The models have both minor sea surface temperature (SST) and wet precipitation biases. The diurnal cycle, representation of equatorial waves, and relationship between SST and precipitation are all improved in the convection-permitting model compared to the convection-parametrised model. The Madden–Julian oscillation (MJO) is present in both models with a faster-than-observed propagation speed. However, it is unclear whether fidelity of the MJO simulation is inherent to the model or whether it predominantly arises from the forcing at the boundaries.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © Author(s) 2024. This work is distributed under the Creative Commons Attribution 4.0 License. |
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) |
Funding Information: | Funder Grant number Met Office P107879 Met Office No External Reference NERC (Natural Environment Research Council) NE/R016739/1 Met Office SEA22_1.14FORSEA P110707 Met Office No External Reference |
Depositing User: | Symplectic Publications |
Date Deposited: | 15 May 2024 08:39 |
Last Modified: | 15 May 2024 08:39 |
Status: | Published |
Publisher: | European Geosciences Union |
Identification Number: | 10.5194/gmd-17-3815-2024 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:212505 |