Characterizing the tropospheric water vapor spatial variation and trend using 2007–2018 COSMIC radio occultation and ECMWF reanalysis data

Shao, Xi; Ho, Shu-Peng; Jing, Xin; Zhou, Xinjia; Chen, Yong; Liu, Tung-Chang; Zhang, Bin; Dong, Jun

doi:https://doi.org/10.5194/acp-23-14187-2023

Articles | Volume 23, issue 22

https://doi.org/10.5194/acp-23-14187-2023

© Author(s) 2023. 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/acp-23-14187-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 22

Research article

|

15 Nov 2023

Research article |

| 15 Nov 2023

Characterizing the tropospheric water vapor spatial variation and trend using 2007–2018 COSMIC radio occultation and ECMWF reanalysis data

Xi Shao, Shu-Peng Ho, Xin Jing, Xinjia Zhou, Yong Chen, Tung-Chang Liu, Bin Zhang, and Jun Dong

Data sets

ECMWF ReAnalysis Model 5 (ERA5) data Copernicus Climate Change Service https://www.ecmwf.int/en/forecasts/dataset/ecmwf-reanalysis-v5

UCAR COSMIC water vapor data CDAAC https://cdaac-www.cosmic.ucar.edu/cdaac/products.html

Short summary

Atmospheric water vapor plays an essential role in the global energy balance, hydrological cycle, and climate system. This paper characterizes and compares the global, latitudinal, and regional variabilities of COSMIC and ERA5 water vapor distribution, as well as the seasonality and long-term trends at selected pressure levels from 2007 to 2018. Evaluation of spatiotemporal variabilities of atmospheric water vapor ensures the qualities of COSMIC and reanalysis water vapor for climate studies.