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Seasonal evolution of the upper‐tropospheric westerly jet core over East Asia
Author(s) -
Zhang Yaocun,
Kuang Xueyuan,
Guo Weidong,
Zhou Tianjun
Publication year - 2006
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 - 10.1029/2006gl026377
Subject(s) - troposphere , westerlies , climatology , jet (fluid) , atmospheric sciences , east asia , zonal and meridional , geology , core (optical fiber) , environmental science , diabatic , geography , physics , china , archaeology , optics , thermodynamics , adiabatic process
The location change of the westerly jet core at upper troposphere in June and July is investigated by using the NCEP/NCAR reanalysis data. The results show that the location of the westerly jet core changes rapidly from 140°E to 90°E during 35th–39th pentads, which corresponds to the plum rain period over East Asia. The location change of the jet core is actually the relative intensity change of the different westerly jet centers. The meridional temperature contrast in the troposphere is associated with the rapid location change of the jet core. The diabatic heating changes are the primary factor determining the seasonal evolution of the westerly jet core over East Asia.