Impact of geographic variations of the convective and dehydration center on  stratospheric water vapor over the Asian monsoon region

Zhang, Kai; Fu, Rong; Wang, Tao; Liu, Yimin

doi:https://doi.org/10.5194/acp-16-7825-2016

Articles | Volume 16, issue 12

https://doi.org/10.5194/acp-16-7825-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-16-7825-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 16, issue 12

Research article

|

27 Jun 2016

Research article |

| 27 Jun 2016

Impact of geographic variations of the convective and dehydration center on stratospheric water vapor over the Asian monsoon region

Kai Zhang, Rong Fu, Tao Wang, and Yimin Liu

Data sets

The MLS H2O Product NASA http://mls.jpl.nasa.gov/products/h2o_product.php

Interpolated OLR dataset NOAA http://www.esrl.noaa.gov/psd/data/gridded/data.interp_OLR.html

ERA-Interim reanalysis data ECMWF https://software.ecmwf.int/wiki/display/WEBAPI/Access+ECMWF+Public+Datasets

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Short summary

Based on observations and trajectory model, we show that the geographic variation of dehydration center associated with that of convection has a significant influence on locations where air mass is dehydrated, and thus water vapor enters the lower stratosphere, in summer over the Asian monsoon region. Specifically, a westward shift of dehydration center toward the area of warmer tropopause temperatures tends to moisten the lower stratosphere.