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Wind‐forced motions in stratified lakes and their effect on mixed‐layer shear
Author(s) -
Monismith Stephen G.
Publication year - 1985
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1985.30.4.0771
Subject(s) - geology , mixed layer , wind stress , tilt (camera) , stratified flow , layer (electronics) , wind shear , shear (geology) , shear stress , mode (computer interface) , mechanics , meteorology , atmospheric sciences , wind speed , geometry , materials science , physics , oceanography , mathematics , turbulence , petrology , composite material , computer science , operating system
The solution for the response of a rectangular, n ‐layered, stratified lake to an arbitrarily varying (in time) wind stress is presented. The case n = 3 is considered in detail. For a three‐layered lake the response is made up of the individual responses of one external and two internal modes. When the upper layer is shallow relative to the other two layers, the mixed‐layer shear is due almost entirely to the slower, second‐mode response. Moreover, the upper interface can tilt quite severely while the lower interface remains nearly flat. Calculations based on the three‐layer model are compared with measurements made in Wellington Reservoir, Western Australia.