TY - JOUR
T1 - A modeling study of the effect of the Andes on the summertime circulation of tropical South America
AU - Kleeman, R.
PY - 1989
Y1 - 1989
N2 - A simple linear two level model of the atmosphere is developed. By blocking the lower layer of the model with a meridional wall, the interaction between diabatic forcing centered in the Amazon basin and the Andes is studied. This forcing can be considered a source of Rossby waves that scatter from the above partial barrier. The scattering process is examined analytically by making the long-wave approximation. Numerical solutions without the long-wave approximation are then considered and the effects of the above scattering process are examined. the upper level circulation is shown to be qualitatively similar to that obtained without a barrier. The low-level circulation west of the barrier is weak in the winds and consists of a positive geopotential response centered at approximately 30°S. To the east, the circulation near the barrier shows similarity to models of the Somali jet. The model produces quite strong trade winds and places a low-pressure center in approximately the position where one is actually observed. -from Author
AB - A simple linear two level model of the atmosphere is developed. By blocking the lower layer of the model with a meridional wall, the interaction between diabatic forcing centered in the Amazon basin and the Andes is studied. This forcing can be considered a source of Rossby waves that scatter from the above partial barrier. The scattering process is examined analytically by making the long-wave approximation. Numerical solutions without the long-wave approximation are then considered and the effects of the above scattering process are examined. the upper level circulation is shown to be qualitatively similar to that obtained without a barrier. The low-level circulation west of the barrier is weak in the winds and consists of a positive geopotential response centered at approximately 30°S. To the east, the circulation near the barrier shows similarity to models of the Somali jet. The model produces quite strong trade winds and places a low-pressure center in approximately the position where one is actually observed. -from Author
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U2 - 10.1175/1520-0469(1989)046<3344:AMSOTE>2.0.CO;2
DO - 10.1175/1520-0469(1989)046<3344:AMSOTE>2.0.CO;2
M3 - Article
AN - SCOPUS:0024943713
SN - 0022-4928
VL - 46
SP - 3344
EP - 3362
JO - Journal of the Atmospheric Sciences
JF - Journal of the Atmospheric Sciences
IS - 21
ER -