气候变化领域集成服务门户(CCPortal): Persistence of moist plumes from overshooting convection in the Asian monsoon anticyclone

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DOI	10.5194/acp-22-3169-2022
	Persistence of moist plumes from overshooting convection in the Asian monsoon anticyclone
	Khaykin, Sergey M.; Moyer, Elizabeth; Kraemer, Martina; Clouser, Benjamin; Bucci, Silvia; Legras, Bernard; Lykov, Alexey; Afchine, Armin; Cairo, Francesco; Formanyuk, Ivan; Mitev, Valentin; Matthey, Renaud; Rolf, Christian; Singer, Clare E.; Spelten, Nicole; Volkov, Vasiliy; Yushkov, Vladimir; Stroh, Fred
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	3169
结束页码	3189
卷号	22 期号:5 页码:21
英文摘要	The Asian monsoon anticyclone (AMA) represents one of the wettest regions in the lower stratosphere (LS) and is a key contributor to the global annual maximum in LS water vapour. While the AMA wet pool is linked with persistent convection in the region and horizontal confinement of the anticyclone, there remain ambiguities regarding the role of tropopause-overshooting convection in maintaining the regional LS water vapour maximum. This study tackles this issue using a unique set of observations from aboard the high-altitude M55-Geophysica aircraft deployed in Nepal in summer 2017 within the EU StratoClim project. We use a combination of airborne measurements (water vapour, ice water, water isotopes, cloud backscatter) together with ensemble trajectory modelling coupled with satellite observations to characterize the processes controlling water vapour and clouds in the confined lower stratosphere (CLS) of the AMA. Our analysis puts in evidence the dual role of overshooting convection, which may lead to hydration or dehydration depending on the synoptic-scale tropopause temperatures in the AMA. We show that all of the observed CLS water vapour enhancements are traceable to convective events within the AMA and furthermore bear an isotopic signature of the overshooting process. A surprising result is that the plumes of moist air with mixing ratios nearly twice the background level can persist for weeks whilst recirculating within the anticyclone, without being subject to irreversible dehydration through ice settling. Our findings highlight the importance of convection and recirculation within the AMA for the transport of water into the stratosphere.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000768258100001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273624
作者单位	Centre National de la Recherche Scientifique (CNRS); UDICE-French Research Universities; Sorbonne Universite; Universite Paris Cite; Universite Paris Saclay; University of Chicago; Helmholtz Association; Research Center Julich; Centre National de la Recherche Scientifique (CNRS); Ecole des Ponts ParisTech; UDICE-French Research Universities; Sorbonne Universite; Universite Paris Cite; Universite PSL; Ecole Normale Superieure (ENS); Consiglio Nazionale delle Ricerche (CNR); Istituto di Scienze dell'Atmosfera e del Clima (ISAC-CNR); Swiss Center for Electronics & Microtechnology (CSEM); University of Neuchatel; University of Vienna; California Institute of Technology
推荐引用方式 GB/T 7714	Khaykin, Sergey M.,Moyer, Elizabeth,Kraemer, Martina,et al. Persistence of moist plumes from overshooting convection in the Asian monsoon anticyclone[J],2022,22(5):21.
APA	Khaykin, Sergey M..,Moyer, Elizabeth.,Kraemer, Martina.,Clouser, Benjamin.,Bucci, Silvia.,...&Stroh, Fred.(2022).Persistence of moist plumes from overshooting convection in the Asian monsoon anticyclone.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(5),21.
MLA	Khaykin, Sergey M.,et al."Persistence of moist plumes from overshooting convection in the Asian monsoon anticyclone".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.5(2022):21.