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Quantification of water vapour transport from the Asian monsoon to the stratosphere
- Source :
- Atmospheric chemistry and physics 19(13), 8947-8966 (2019). doi:10.5194/acp-19-8947-2019
- Publication Year :
- 2019
-
Abstract
- 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, is strongly affecting surface climate (cf. 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 % vs. 6.4 %).
- Subjects :
- 010504 meteorology & atmospheric sciences
Asian summer monsoon
0207 environmental engineering
02 engineering and technology
01 natural sciences
water vapour
13. Climate action
Erdsystem-Modellierung
Asian monsoon
transport
stratosphere
ddc:550
020701 environmental engineering
0105 earth and related environmental sciences
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Atmospheric chemistry and physics 19(13), 8947-8966 (2019). doi:10.5194/acp-19-8947-2019
- Accession number :
- edsair.doi.dedup.....013822ab6d71901a4995c01fb9b6817b