Scopus记录号: 2-s2.0-85062875189
论文题名: Impacts of tropical tropopause warming on the stratospheric water vapor
作者: Xia Y. ; Huang Y. ; Hu Y. ; Yang J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2019
语种: 英语
英文关键词: Brewer–Dobson circulation
; Specified Dynamics WACCM
; Stratospheric water vapor
; Tropical tropopause temperature
英文摘要: We investigate the impact of tropical tropopause warming on the stratospheric water vapor using the Specified-Dynamics version of the NCAR Whole Atmosphere Community Climate Model. We find that the tropical tropopause warming results in a strengthening of the Brewer–Dobson circulation (BDC). The strengthening of BDC induced by a narrow warming of tropical tropopause within 12° latitude, which is much stronger in boreal winter than that in boreal summer, propagates more dry air from the tropical tropopause into the stratosphere and thus causes a reduction of water vapor in the middle stratosphere. On the contrary, the seasonal difference of the BDC strengthening is weaker in the experiment with a broader tropical tropopause warming within 25° latitude. The drying effect of the BDC is counteracted by the moistening effects of the tropical tropopause warming and methane oxidation. This leads to the moistening in both the lower and upper stratosphere. The results suggest the control of the stratospheric humidity by the tropical tropopause temperature could be significantly offset by the associated BDC changes. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature. 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122495
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China; Department of Atmospheric and Oceanic Sciences, McGill University, Montreal, Canada
Recommended Citation:
Xia Y.,Huang Y.,Hu Y.,et al. Impacts of tropical tropopause warming on the stratospheric water vapor[J]. Climate Dynamics,2019-01-01