%0 Journal Article
%T Projection of the East Asian westerly jet under six global warming targets
%A Dong GUO
%A Yuanhai FU
%J Atmospheric and Oceanic Science Letters
%D 2020
%R https://doi.org/10.1080/16742834.2020.1715199
%X ABSTRACT This study investigates the projected changes in the East Asian westerly jet (EAJ) under six global warming targets (1.5ˇăC, 2.0ˇăC, 2.5ˇăC, 3.0ˇăC, 3.5ˇăC, and 4.0ˇăC) relative to the present climate, using the outputs of CMIP5 models. The results show that the westerly tends to weaken slightly under the 1.5ˇăC warming target. Under the 2.0ˇăC target, it is projected to intensify south of the EAJˇŻs axis (approximately 40ˇăN) and decay north of the axis. This change becomes increasingly evident under the 2.5ˇăC and higher warming targets, which suggests that the EAJˇŻs axis will move farther and farther southward, but its intensity will change little with increasing global warming. Further analyses suggest that the change in the EAJ is closely related to the inhomogeneous rising rate of air temperature in the mid¨Cupper troposphere. The relatively slow-rising air temperature in the mid¨Cupper troposphere over the EAJˇŻs entrance and exit regions will lead to a negative (positive) meridional temperature gradient to the south (north), and will then accelerate (decelerate) the westerly on the EAJˇŻs south/north side
%U https://www.tandfonline.com/doi/full/10.1080/16742834.2020.1715199