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Orographic rainfall in warm sectors of depressions
Author(s) -
Bader M. J.,
Roach W. T.
Publication year - 1977
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49710343605
Subject(s) - orographic lift , precipitation , washout , environmental science , atmospheric sciences , climatology , meteorology , falling (accident) , orography , geology , geography , medicine , environmental health
Results of some calculations are presented which show that the washout of droplets in a low‐level, orographically produced cloud by raindrops falling from a higher‐level cloud (formed by large‐scale ascent) can augment the rainfall rate by several mm h −1 over a hill a few hundred metres high. The dependence of this enhancement upon different meteorological parameters is discussed and calculated values are compared with some observed rainfall rates over south Wales. It is considered that this mechanism is most effective in enhancing warm‐sector precipitation over hills.