Climatic factors contributing to interannual and interdecadal variations in the meridional displacement of the East Asian jet stream in boreal winter

2021 ◽  
Vol 264 ◽  
pp. 105864
Author(s):  
Dong Xiao ◽  
Ping Zhao ◽  
Hong-Li Ren
Keyword(s):  
Climatic Factors ◽  
East Asian ◽  
Boreal Winter ◽  
Jet Stream ◽  
Meridional Displacement ◽  
East Asian Jet Stream

Variability in zonal location of winter East Asian jet stream

2016 ◽  
Vol 37 (10) ◽  
pp. 3753-3766 ◽  
Author(s):  
Sha Wu ◽  
Jianqi Sun
Keyword(s):  
East Asian ◽  
Jet Stream ◽  
East Asian Jet Stream

Roles of Intraseasonal Disturbances and Diabatic Heating in the East Asian Jet Stream Variabilities Associated with the East Asian Winter Monsoon

2018 ◽  
Vol 31 (7) ◽  
pp. 2871-2887 ◽  
Author(s):  
Nagio Hirota ◽  
Mai Ohta ◽  
Yousuke Yamashita ◽  
Masaaki Takahashi
Keyword(s):  
Diabatic Heating ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Low Frequency ◽  
Winter Monsoon ◽  
Jet Stream ◽  
Mean Flow ◽  
Asian Winter Monsoon ◽  
Frequency Components ◽  
East Asian Jet Stream

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.

scholarly journals Change in Relationship between the East Asian Winter Monsoon and the East Asian Jet Stream during the 1998–99 Regime Shift

2019 ◽  
Vol 32 (18) ◽  
pp. 6163-6175 ◽  
Author(s):  
Se-Yong Song ◽  
Sang-Wook Yeh ◽  
Jae-Heung Park
Keyword(s):  
East Asian Winter Monsoon ◽  
East Asian ◽  
Hadley Circulation ◽  
Winter Monsoon ◽  
Jet Stream ◽  
Decadal Change ◽  
Reanalysis Dataset ◽  
Asian Winter Monsoon ◽  
East Asian Jet Stream ◽  
The Relationship

Abstract A composite analysis was conducted on the reanalysis dataset for 1979–2016, along with an idealized model experiment to show that the relationship between the East Asian jet stream (EAJS) and the East Asian winter monsoon (EAWM) is nonstationary. The relationship between EAWM and the EAJS weakened during the late 1990s. This decadal change in the EAJS–EAWM relationship was mainly due to a change in the secondary circulation across the EAJS between two contrasting periods, induced by the northward shift of the EAJS. A possible mechanism associated with the decadal change in meridional displacement of the EAJS is proposed. The enhanced convective activity in the western tropical Pacific after the late 1990s results in stronger Hadley circulation that could have contributed to the northward displacement of the Hadley circulation boundary latitude. Subsequently, this leads to the northward shift of the EAJS. Therefore, it is necessary to define a new EAJS index to account for the EAWM variability based on the change in the oceanic and atmospheric mean state across the late 1990s.

Responses of the East Asian jet stream to the North Pacific subtropical front in spring

2017 ◽  
Vol 34 (2) ◽  
pp. 144-156 ◽  
Author(s):  
Leying Zhang ◽  
Haiming Xu ◽  
Ning Shi ◽  
Jiechun Deng
Keyword(s):  
North Pacific ◽  
East Asian ◽  
Jet Stream ◽  
Subtropical Front ◽  
The North ◽  
East Asian Jet Stream ◽  
The North Pacific
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