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Effective resolution in high resolution global atmospheric models for climate studies

Klaver, R., Haarsma, R., Vidale, P. L. and Hazeleger, W. (2020) Effective resolution in high resolution global atmospheric models for climate studies. Atmospheric Science Letters, 21 (4). e952. ISSN 1530-261X

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To link to this item DOI: 10.1002/asl.952

Abstract/Summary

We estimate the extent of spatial scales that atmospheric models in a new generation of global climate models, used in the Coupled Model Intercomparison Project 6, are able to resolve on the basis of kinetic energy spectra, commonly referred to as the effective resolution. We examine the spectra derived from the rotational and divergent parts of the wind for six state‐of‐the‐art global climate models that have been run with at least two horizontal resolutions. For each of the high resolution configurations, the effective resolution enhancement is less than proportional to the increase of the nominal resolution. The highest effective resolution obtained by the models in this study is roughly 200 km. This shows that the newest generation of high resolution climate models starts to resolve synoptic scales relevant for the dynamics of weather events.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:89517
Publisher:John Wiley & Sons

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