Tracing changes in atmospheric moisture supply to the drying Southwest China

Zhang, Chi; Tang, Qiuhong; Chen, Deliang; Li, Laifang; Liu, Xingcai; Cui, Huijuan

doi:https://doi.org/10.5194/acp-17-10383-2017

Articles | Volume 17, issue 17

https://doi.org/10.5194/acp-17-10383-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-17-10383-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 17, issue 17

Research article

|

05 Sep 2017

Research article |

| 05 Sep 2017

Tracing changes in atmospheric moisture supply to the drying Southwest China

Chi Zhang, Qiuhong Tang, Deliang Chen, Laifang Li, Xingcai Liu, and Huijuan Cui

Supplement

https://doi.org/10.5194/acp-17-10383-2017-supplement

Data sets

ERA-I data ECMWF http://apps.ecmwf.int/datasets/data/interim-full-daily/

GLDAS data NASA GES DISC https://ldas.gsfc.nasa.gov/gldas/

CMA precipitation dataset China Meteorological Data Service Center http://data.cma.cn/en

GLOBE elevation data NOAA https://www.ngdc.noaa.gov/mgg/topo/globe.html

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Short summary

Precipitation over Southwest China (SWC) has decreased significantly in recent years. By tracking precipitation moisture, we found that the reduced precipitation results from the reduced moisture supply from the extended west, which is influenced by the South Asian summer monsoon and the westerlies. Further study revealed the dynamic variations in circulation dominate the interannual variations in SWC precipitation. Changes in circulation systems may be related to the recent changes in SSTs.