Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 37, issue 1
Articles | Volume 37, issue 1
https://doi.org/10.5194/angeo-37-25-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/angeo-37-25-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 37, issue 1
Regular paper
 | 
15 Jan 2019
Regular paper |  | 15 Jan 2019

Comparisons between the WRF data assimilation and the GNSS tomography technique in retrieving 3-D wet refractivity fields in Hong Kong

Zhaohui Xiong, Bao Zhang, and Yibin Yao

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Short summary
A comparison between the GNSS tomography technique and WRFDA in retrieving wet refractivity (WR) is conducted in HK during a wet period and a dry period. The results show that both of them can retrieve good WR. In most of the cases, the WRFDA output outperforms the tomographic WR, but the tomographic WR is better than the WRFDA output in the lower troposphere in the dry period. By assimilating better tomographic WR in the lower troposphere into the WRFDA, we slightly improve the retrieved WR.
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Advanced Global Navigation Satellite Systems tropospheric...