气候变化领域集成服务门户(CCPortal): Impacts of tropical tropopause warming on the stratospheric water vapor

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DOI	10.1007/s00382-019-04714-3
	Impacts of tropical tropopause warming on the stratospheric water vapor
	Xia Y.; Huang Y.; Hu Y.; Yang J.
发表日期	2019
ISSN	0930-7575
起始页码	3409
结束页码	3418
卷号	53 期号:2020-05-06
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.
英文关键词	Brewer–Dobson circulation; Specified Dynamics WACCM; Stratospheric water vapor; Tropical tropopause temperature
语种	英语
scopus关键词	air temperature; atmospheric circulation; humidity; stratosphere; tropical environment; tropopause; warming; water vapor
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146030
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
推荐引用方式 GB/T 7714	Xia Y.,Huang Y.,Hu Y.,et al. Impacts of tropical tropopause warming on the stratospheric water vapor[J],2019,53(2020-05-06).
APA	Xia Y.,Huang Y.,Hu Y.,&Yang J..(2019).Impacts of tropical tropopause warming on the stratospheric water vapor.Climate Dynamics,53(2020-05-06).
MLA	Xia Y.,et al."Impacts of tropical tropopause warming on the stratospheric water vapor".Climate Dynamics 53.2020-05-06(2019).