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Quantification of water vapour transport from the Asian monsoon to the stratosphere

Nützel, Matthias and Podglajen, Aurélien and Garny, Hella and Ploeger, Felix (2019) Quantification of water vapour transport from the Asian monsoon to the stratosphere. Atmospheric Chemistry and Physics, 19, pp. 8947-8966. Copernicus Publications. doi: 10.5194/acp-19-8947-2019. ISSN 1680-7316.

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Official URL: https://www.atmos-chem-phys.net/19/8947/2019/


Numerous studies have presented evidence that the Asian summer monsoon anticyclone substantially influences the distribution of trace gases – including water vapour – in the upper troposphere and lower stratosphere (e.g. Santee et al., 2017). Stratospheric water vapour in turn strongly affects surface climate (see e.g. Solomon et al., 2010). Here, we analyse the characteristics of water vapour transport from the upper troposphere in the Asian monsoon region to the stratosphere employing a multiannual simulation with the chemistry-transport model CLaMS (Chemical Lagrangian Model of the Stratosphere). This simulation is driven by meteorological data from ERA-Interim and features a water vapour tagging that allows us to assess the contributions of different upper tropospheric source regions to the stratospheric water vapour budget. Our results complement the analysis of air mass transport through the Asian monsoon anticyclone by Ploeger et al. (2017). The results show that the transport characteristics for water vapour are mainly determined by the bulk mass transport from the Asian monsoon region. Further, we find that, although the relative contribution from the Asian monsoon region to water vapour in the deep tropics is rather small (average peak contribution of 14 % at 450 K), the Asian monsoon region is very efficient in transporting water vapour to this region (when judged according to its comparatively small spatial extent). With respect to the Northern Hemisphere extratropics, the Asian monsoon region is much more impactful and efficient regarding water vapour transport than e.g. the North American monsoon region (averaged maximum contributions at 400 K of 29 % versus 6.4 %).

Item URL in elib:https://elib.dlr.de/128441/
Document Type:Article
Additional Information:We investigate the transport pathways of water vapour from the upper troposphere in the Asian monsoon region to the stratosphere. In the employed chemistry-transport model we use a tagging method, such that the impact of different source regions on the stratospheric water vapour budget can be quantified. A key finding is that the Asian monsoon (compared to other source regions) is very efficient in transporting air masses and water vapour to the tropical and extratropical stratosphere.
Title:Quantification of water vapour transport from the Asian monsoon to the stratosphere
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Podglajen, AurélienForschungszentrum Jülich, GermanyUNSPECIFIEDUNSPECIFIED
Ploeger, FelixForschungszentrum Jülich, Germany and Institute for Atmospheric and Environmental Research, University of WuppertalUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 8947-8966
Publisher:Copernicus Publications
Keywords:Asian summer monsoon, water vapour, transport, stratosphere
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Transport und Klima (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Nützel, Matthias
Deposited On:30 Jul 2019 08:40
Last Modified:14 Nov 2023 07:59

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