DOI: 10.1175/JCLI-D-16-0390.1
Scopus记录号: 2-s2.0-85047061546
论文题名: Roles of intraseasonal disturbances and diabatic heating in the East Asian jet stream variabilities associated with the East Asian winter monsoon
作者: Hirota N. ; Ohta M. ; Yamashita Y. ; Takahashi M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 7 起始页码: 2871
结束页码: 2887
语种: 英语
英文关键词: Asia
; Atmospheric circulation
; Monsoons
Scopus关键词: Atmospheric movements
; Heating
; Asia
; Atmospheric circulation
; East asian jet streams
; East Asian winter monsoon
; High frequency components
; Intraseasonal disturbances
; Low-frequency components
; Monsoons
; Atmospheric thermodynamics
; atmospheric circulation
; diabatic process
; eddy
; environmental disturbance
; jet stream
; monsoon
; winter
; Far East
英文摘要: This study evaluates the relative importance of diabatic heating and intraseasonal disturbances with regard to the variabilities of the East Asian jet stream (EAJS) associated with the East Asian winter monsoon (EAWM). First, strong and weak monsoon years are selected based on the EAWM index of Jhun and Lee, which is highly correlated with the monsoon northerlies between the Eurasian continent and the Pacific. The EAJS is stronger and narrower in strong monsoon years and weaker and wider in weak monsoon years. Model experiments were performed to investigate the atmospheric response to the diabatic heating and the eddy-mean flow feedback from the intraseasonal disturbances. The diabatic heating is closely related to the convective activities. The intraseasonal disturbances include high-frequency components with periods of 3-10 days and low-frequency components with periods of 10-90 days. The model results indicate that the diabatic heating plays a major role maintaining the stronger and weaker EAJS in the strong and weak monsoon years, respectively, whereas the impacts of the eddy feedback are relatively small. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111569
Appears in Collections: 气候减缓与适应
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作者单位: National Institute for Environmental Studies, Tsukuba, Japan; Atmosphere and Ocean Research Institute, Chiba, Japan; Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
Recommended Citation:
Hirota N.,Ohta M.,Yamashita Y.,et al. Roles of intraseasonal disturbances and diabatic heating in the East Asian jet stream variabilities associated with the East Asian winter monsoon[J]. Journal of Climate,2018-01-01,31(7)