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The effect of model grid length and orographic rainfall ‘efficiency’ on computed surface rainfall

✍ Scribed by C. G. Collier

Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
413 KB
Volume
103
Category
Article
ISSN
0035-9009

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✦ Synopsis

Abstract

Surface rainfall distributions over North and South Wales are derived using a numerical parameterization model. Several different grid lengths are used which allow the dependence on grid length of areal rainfall produced by the model to be examined. It is found that as the grid length increases from one to ten kilometres areal rainfall totals predicted by the model decrease, in some cases quite rapidly. the areal rainfall totals also depend upon the amount of orographic enhancement operating in particular cases owing to cloud physics processes which are not parameterized in the model. A suggestion is offered as to how these processes may be taken into account in the model.

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