TY - JOUR
T1 - Quasigeostrophic turbulence in a three-layer model
T2 - effects of vertical structure in the mean shear
AU - Held, I. M.
AU - O'Brien, E.
PY - 1992
Y1 - 1992
N2 - For equal values of the mean vertical shear, eddy fluxes and energies are greater when the shear is concentrated at lower levels (d2U/dz2<0) than when the shear is concentrated at higher levels (d2U/dz2>0). Eddy fluxes are more sensitive to lower- than to upper-level mean temperature gradients. This relative sensitivity is a function of γ = f2Λ/(βN2H), where Λ is the mean vertical shear and H is the depth of the fluid. It is enhanced as γ is reduced, as the unstable modes become shallower, until the eddies become almost completely insensitive to the strength of the upper-layer wind for γ <0.5. -from Authors
AB - For equal values of the mean vertical shear, eddy fluxes and energies are greater when the shear is concentrated at lower levels (d2U/dz2<0) than when the shear is concentrated at higher levels (d2U/dz2>0). Eddy fluxes are more sensitive to lower- than to upper-level mean temperature gradients. This relative sensitivity is a function of γ = f2Λ/(βN2H), where Λ is the mean vertical shear and H is the depth of the fluid. It is enhanced as γ is reduced, as the unstable modes become shallower, until the eddies become almost completely insensitive to the strength of the upper-layer wind for γ <0.5. -from Authors
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U2 - 10.1175/1520-0469(1992)049<1861:QTIATL>2.0.CO;2
DO - 10.1175/1520-0469(1992)049<1861:QTIATL>2.0.CO;2
M3 - Article
AN - SCOPUS:0027087975
SN - 0022-4928
VL - 49
SP - 1861
EP - 1870
JO - Journal of the Atmospheric Sciences
JF - Journal of the Atmospheric Sciences
IS - 19
ER -