气候变化领域集成服务门户(CCPortal): Processes influencing lower stratospheric water vapour in monsoon anticyclones: Insights from Lagrangian modelling

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DOI	10.5194/acp-21-9585-2021
	Processes influencing lower stratospheric water vapour in monsoon anticyclones: Insights from Lagrangian modelling
	Plaza N.P.; Podglajen A.; Peña-Ortiz C.; Ploeger F.
发表日期	2021
ISSN	1680-7316
起始页码	9585
结束页码	9607
卷号	21 期号:12
英文摘要	We investigate the influence of different chemical and physical processes on the water vapour distribution in the lower stratosphere (LS), in particular in the Asian and North American monsoon anticyclones (AMA and NAMA, respectively). Specifically, we use the chemistry transport model CLaMS to analyse the effects of large-scale temperatures, methane oxidation, ice microphysics, and small-scale atmospheric mixing processes in different model experiments. All these processes hydrate the LS and, particularly, the AMA. While ice microphysics has the largest global moistening impact, it is small-scale mixing which dominates the specific signature in the AMA in the model experiments. In particular, the small-scale mixing parameterization strongly contributes to the water vapour transport to this region and improves the simulation of the intra-seasonal variability, resulting in a better agreement with the Aura Microwave Limb Sounder (MLS) observations. Although none of our experiments reproduces the spatial pattern of the NAMA as seen in MLS observations, they all exhibit a realistic annual cycle and intra-seasonal variability, which are mainly controlled by large-scale temperatures. We further analyse the sensitivity of these results to the domain-filling trajectory set-up, here-called Lagrangian trajectory filling (LTF). Compared with MLS observations and with a multiyear reference simulation using the full-blown chemistry transport model version of CLaMS, we find that the LTF schemes result in a drier global LS and in a weaker water vapour signal over the monsoon regions, which is likely related to the specification of the lower boundary condition. Overall, our results emphasize the importance of subgrid-scale mixing and multiple transport pathways from the troposphere in representing water vapour in the AMA. © 2021 Nuria Pilar Plaza et al.
语种	英语
scopus关键词	anticyclone; atmospheric modeling; atmospheric transport; microwave limb sounder; mixing; monsoon; stratosphere; water vapor
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/246783
作者单位	Área de Física de la Tierra, Departamento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo de Olavide, Seville, Spain; Laboratoire de Météorologie Dynamique (LMD/IPSL), École Polytechnique, Institut Polytechnique de Paris, Sorbonne Université, École Normale Supérieure, PSL Research University, CNRS, Paris, France; Institute of Climate Research, Stratosphere (IEK-7), Forschungszentrum Jülich, Jülich, Germany; Institute for Atmospheric and Environmental Research, University of Wuppertal, Wuppertal, Germany
推荐引用方式 GB/T 7714	Plaza N.P.,Podglajen A.,Peña-Ortiz C.,et al. Processes influencing lower stratospheric water vapour in monsoon anticyclones: Insights from Lagrangian modelling[J],2021,21(12).
APA	Plaza N.P.,Podglajen A.,Peña-Ortiz C.,&Ploeger F..(2021).Processes influencing lower stratospheric water vapour in monsoon anticyclones: Insights from Lagrangian modelling.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(12).
MLA	Plaza N.P.,et al."Processes influencing lower stratospheric water vapour in monsoon anticyclones: Insights from Lagrangian modelling".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.12(2021).