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

We use multiannual simulations with the chemistry-transport model CLaMS (Chemical Lagrangian Model of the Stratosphere) to analyze water vapour transport from the Asian monsoon region to the stratosphere. Further, we make comparisons of the transport characteristics from the Asian monsoon to the stratosphere with those of other source regions (e.g. from the tropics). In addition, we characterize the transport efficiency of the monsoon region compared to other source regions and bring our results into context with previous studies, which have focused on water vapour transport from the Asian monsoon to the stratosphere. These analyses are complementing the previously published work by Ploeger et al. (2017), who have analyzed mass transport from the Asian monsoon anticyclone to the stratosphere. The presented findings have been recently published in Atmospheric Chemistry and Physics (N&#252;tzel et al., 2019).&#160;References:Ploeger, F., Konopka, P., Walker, K., and Riese, M.: Quantifying pollution transport from the Asian monsoon anticyclone into the lower stratosphere, Atmos. Chem. Phys., 17, 7055-7066, https://doi.org/10.5194/acp-17-7055-2017, 2017.N&#252;tzel, M., Podglajen, A., Garny, H., and Ploeger, F.: Quantification of water vapour transport from the Asian monsoon to the stratosphere, Atmos. Chem. Phys., 19, 8947&#8211;8966, https://doi.org/10.5194/acp-19-8947-2019, 2019. &#160;&#160;&#160;

Download Full-text

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

Atmospheric Chemistry and Physics ◽

10.5194/acp-19-8947-2019 ◽

2019 ◽

Vol 19 (13) ◽

pp. 8947-8966 ◽

Cited By ~ 1

Author(s):

Matthias Nützel ◽

Aurélien Podglajen ◽

Hella Garny ◽

Felix Ploeger

Keyword(s):

Mass Transport ◽

Water Vapour ◽

Asian Monsoon ◽

Lagrangian Model ◽

Vapour Transport ◽

Monsoon Region ◽

Asian Monsoon Region ◽

Upper Troposphere ◽

Water Vapour Transport ◽

Stratospheric Water Vapour

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 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 %).

Download Full-text

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

10.5194/acp-2019-169 ◽

2019 ◽

Cited By ~ 1

Author(s):

Matthias Nützel ◽

Aurelien Podglajen ◽

Hella Garny ◽

Felix Ploeger

Keyword(s):

Mass Transport ◽

Water Vapour ◽

Asian Monsoon ◽

Lagrangian Model ◽

Vapour Transport ◽

Monsoon Region ◽

Asian Monsoon Region ◽

Upper Troposphere ◽

Water Vapour Transport ◽

Stratospheric Water Vapour

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 %).

Download Full-text