Responses to humidity and temperature perturbations in high-resolution simulations of convection

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Raupach, T. H., Daleu, C. ORCID: https://orcid.org/0000-0003-2075-4902, Plant, R. S. ORCID: https://orcid.org/0000-0001-8808-0022, Sherwood, S. C. and Hwong, Y.-L. (2026) Responses to humidity and temperature perturbations in high-resolution simulations of convection. Journal of Advances in Modeling Earth Systems. ISSN 1942-2466 (In Press)

Abstract/Summary

Convection parameterization is a leading source of uncertainty in global and regional climate models, and a lack of ground truth complicates the assessment of convection scheme performance. Here we test a linear framework for quantifying convective responses, using two models run at convection-permitting resolution, to examine model responses to temperature and humidity perturbations. For the models examined, a grid spacing finer than ∼1 km was required for consistent (hence potentially accurate) responses, implying good representation of convectively-coupled dynamics. The results from the tests at 100 m and 250 m grid spacing could reasonably be used in idealized tests of convective schemes, as their spread is mostly small compared to the spread of previously reported scheme behavior.

Item Type Article
URI https://centaur.reading.ac.uk/id/eprint/129063
Refereed Yes
Divisions Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
Publisher American Geophysical Union
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