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Abstract
Overly frequent light precipitation (<5 mm d-1), or drizzle, is a persistent problem in many climate models, including the ACME model. Errors in the intensity and frequency of precipitation have a large impact on cloud evolution and latent heat distribution within the atmosphere and therefore have a potentially important impact on a model’s climate and the general circulation. Past studies have noted that most of the drizzle in models is produced by convective parameterizations and have suggested that the frequent drizzle problem arises from a propensity of convection schemes to trigger too easily.
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