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On semi‐geostrophic flow over synoptic‐scale topography
Author(s) -
Cullen M. J. P.,
Chynoweth S.,
Purser R. J.
Publication year - 1987
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.49711347510
Subject(s) - geostrophic wind , ridge , geology , flow (mathematics) , drag , orographic lift , scaling , scale (ratio) , meteorology , mechanics , climatology , mathematics , geometry , physics , geography , cartography , precipitation , paleontology
Existing semi‐geostrophic theories of flow over a two‐dimensional orographic ridge are extended using a geometrical interpretation of the equations. the method of solution allows information to be gained even when there are local violations of the scaling assumptions. the results show that the occurrence of many observed aspects of the flow, such as downslope winds, drag and flow separation, can be predicted. Quantitative assessment requires a three‐dimensional version of the model.