Evaluation of multi-season convection permitting atmosphere - mixed layer ocean simulations of the Maritime Continent

Howard, Emma, Woolnough, Steven, Klingaman, Nicholas, Shipley, Daniel, Sanchez, Claudio, Peatman, Simon C., Birch, Cathryn E. and Matthews, Adrian J. ORCID: https://orcid.org/0000-0003-0492-1168 (2024) Evaluation of multi-season convection permitting atmosphere - mixed layer ocean simulations of the Maritime Continent. Geoscientific Model Development. ISSN 1991-9603 (In Press)

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Abstract

A multi-season convection permitting regional climate simulation of the Maritime Continent using the Met Office Unified Model 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 ERA5 reanalysis. This paper describes the configuration, performance of the mean state and variability of the two simulations compared against observational datasets. The models both have 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 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.

Item Type: Article
Uncontrolled Keywords: sdg 13 - climate action ,/dk/atira/pure/sustainabledevelopmentgoals/climate_action
Faculty \ School: Faculty of Science > School of Natural Sciences
Faculty of Science > School of Environmental Sciences
University of East Anglia Research Groups/Centres > Theme - ClimateUEA
UEA Research Groups: Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences
Depositing User: LivePure Connector
Date Deposited: 20 Mar 2024 09:31
Last Modified: 25 Mar 2024 01:50
URI: https://ueaeprints.uea.ac.uk/id/eprint/94727
DOI: 10.5194/gmd-2023-165

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