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Meteorological conditions in heavy orographic rainfall in the british isles
Author(s) -
Douglas C. K. M.,
Glasspoole J.
Publication year - 1947
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.49707331503
Subject(s) - orographic lift , orography , climatology , meteorology , environmental science , geography , geology , precipitation
The paper attempts to clarify certain points raised during the discussion on orographic rain held by the Society on February 21, 1945 ( Q.J. , 71 p. 41). It is shown that rain in the warm sectors of depressions plays a large and often dominant part in large falls of orographic rain. A brief description is given of the outstanding orographic rains since 1909, with a note on the synoptic situation. Some recent cases with upper air information bring out the importance of a deep damp layer (almost or quite saturated) in the warm air, and it is considered that convergence is the main factor in producing this, though other factors also are taken into account It is shown that potential instability in the warm air is not a necessary factor for heavy orographic rainfall. A general discussion of this subject is included.