Publication Date:
2011-08-06
Description:
Mass-flux convection schemes continue to play key roles in large-scale atmospheric modelling. Currently, however, the specification of detrainment seems a potential weakness. Using cloud-resolving model results from the European Cloud Systems (EUROCS) humidity case, we consider how detrainment adapts to its environment and formulate a minimal-complexity description of partial detrainment in convective cloud fields. This can be viewed as an approximation to the behaviour of a multi-plume scheme. The algorithm is straightforwardly implemented within the Gregory–Rowntree convection scheme as an extension of its original partial-detrainment scheme. Numerical weather prediction tests in the Met Office Unified Model show significant benefits in full-model performance. © 2011 Crown Copyright, the Met Office. Published by JohnWiley & Sons Ltd.
Print ISSN:
0035-9009
Electronic ISSN:
1477-870X
Topics:
Geography
,
Physics
