Contribution of moisture sources to precipitation changes in the Three Gorges Reservoir Region

Li, Ying; Wang, Chenghao; Peng, Hui; Xiao, Shangbin; Yan, Denghua

doi:https://doi.org/10.5194/hess-25-4759-2021

Articles | Volume 25, issue 9

https://doi.org/10.5194/hess-25-4759-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Analysis of atmospheric water vapour observations and their...

https://doi.org/10.5194/hess-25-4759-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 25, issue 9

Research article

|

02 Sep 2021

Research article |

| 02 Sep 2021

Contribution of moisture sources to precipitation changes in the Three Gorges Reservoir Region

Ying Li, Chenghao Wang, Hui Peng, Shangbin Xiao, and Denghua Yan

Data sets

The ERA-Interim reanalysis dataset European Centre for Medium-Range Weather Forecast https://apps.ecmwf.int/datasets/data/interim-full-daily/

Modern-Era Retrospective analysis for Research and Applications, Version 2 NASA Goddard Earth Sciences Data and Information Services Center https://disc.gsfc.nasa.gov/datasets?project=MERRA-2

RA-55: Japanese 55-year Reanalysis, Daily 3-Hourly and 6-Hourly Data Japan Meteorological Agency https://rda.ucar.edu/datasets/ds628.0/

China Monthly Surface Precipitation 0.5° × 0.5° Gridded Data Set (V2.0 China Meteorological Data Service Center http://data.cma.cn/site/showSubject/id/46.html

Tropical Rainfall Measuring Mission (TRMM) (TMPA/3B43) Rainfall Estimate L3 1 month 0.25 degree × 0.25 degree V7 NASA Goddard Earth Sciences Data and Information Services Center https://disc.gsfc.nasa.gov/datasets/TRMM_3B43_7/summary?keywords=TMPA

Short summary

Precipitation change in the Three Gorges Reservoir Region (TGRR) plays a critical role in the operation and regulation of the Three Gorges Dam and the protection of residents and properties. We investigated the long-term contribution of moisture sources to precipitation changes in this region with an atmospheric moisture tracking model. We found that southwestern source regions (especially the southeastern tip of the Tibetan Plateau) are the key regions that control TGRR precipitation changes.