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Downward propagation of upper stratospheric mean zonal wind perturbation to the troposphere
Author(s) -
Kodera Kunihiko,
Yamazaki Koji,
Chiba Masaru,
Shibata Kiyotaka
Publication year - 1990
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl017i009p01263
Subject(s) - stratosphere , troposphere , westerlies , atmospheric sciences , environmental science , atmospheric circulation , latitude , atmosphere (unit) , polar night , quasi biennial oscillation , polar , climatology , geology , meteorology , physics , geodesy , astronomy
An investigation is conducted to determine the influence of changes in the upper stratospheric mean zonal wind on the circulation of the lower atmosphere. In addition to observed data, results of numerical experiments with a general circulation model are used, in which the solar ultraviolet heating rate is varied to force changes in the mean zonal wind in the upper stratosphere. It is found that when the upper stratospheric mid‐latitude westerlies are strong during December, lower stratospheric polar night jet is persistent and the westerlies in the polar region of the troposphere become stronger in the following February. These results are common to both the observations and the numerical experiments.