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Cited by 494

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Sensitivity of moist convection to environmental humidity

Derbyshire, S. H., Beau, I., Bechtold, P., Grandpeix, J.‐Y., Piriou, J.‐M., Redelsperger, J.‐L., Soares, P. M. M.·2004·Quarterly Journal of the Royal Meteorological Society

Abstract

As part of the EUROCS (EUROpean Cloud Systems study) project, cloud‐resolving model (CRM) simulations and parallel single‐column model (SCM) tests of the sensitivity of moist atmospheric convection to midtropospheric humidity are presented. This sensitivity is broadly supported by observations and some previous model studies, but is still poorly quantified. Mixing between clouds and environment is a key mechanism, central to many of the fundamental differences between convection schemes. Here, we define an idealized quasi‐steady ‘testbed’, in which the large‐scale environment is assumed to adjust the local mean profiles on a timescale of one hour. We then test sensitivity to the target profiles at heights above 2 km. Two independent CRMs agree reasonably well in their response to the different background profiles and both show strong deep precipitating convection in the more moist cases, but only shallow convection in the driest case. The CRM results also appear to be numerically robust. All the SCMs, most of which are one‐dimensional versions of global climate models (GCMs), show sensitivity to humidity but differ in various ways from the CRMs. Some of the SCMs are improved in the light of these comparisons, with GCM improvements documented elsewhere. © Crown copyright, 2004.

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Metadata

Authors
Derbyshire, S. H., Beau, I., Bechtold, P., Grandpeix, J. ‐., Piriou, J. ‐., Redelsperger, J. ‐., & Soares, P. M. M.
Venue
Quarterly Journal of the Royal Meteorological Society
Publisher
Wiley
Published
2004-10
Volume
130
Issue
604
Pages
3055-3079
ISSN
  • 0035-9009 (ISSN-L)
  • 1477-870X
OpenAlex
W2156894412
Cited by
494
References
22
FWCI
6.12
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Sensitivity of moist convection to environmental humidity. https://app.cochat.ai/papers/10.1256/qj.03.130
The paper
Derbyshire, S. H., Beau, I., Bechtold, P., Grandpeix, J. ‐., Piriou, J. ‐., Redelsperger, J. ‐., & Soares, P. M. M. (2004). Sensitivity of moist convection to environmental humidity. Quarterly Journal of the Royal Meteorological Society. https://doi.org/10.1256/qj.03.130

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