Remote sensing of atmospheric water vapor in the region of southwest China using GPS

Yanmeng Bi; Jietai Mao; Meihua Wang; Chengcai Li

doi:10.1117/12.619754

12 May 2005 Remote sensing of atmospheric water vapor in the region of southwest China using GPS

Yanmeng Bi, Jietai Mao, Meihua Wang, Chengcai Li

Proceedings Volume 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies; (2005) https://doi.org/10.1117/12.619754
Event: Optical Technologies for Atmospheric, Ocean, and Environmental Studies, 2004, Beijing, China

Abstract

GPS technology provides a new powerful approach for measuring atmospheric water vapor. In this paper the experiment of observing integrated atmospheric water vapor or the precipitable water (PW) using ground-based GPS receivers performed in southwestern region of China is presented. Zenith total delay (ZPD) data are collected in a GPS network consisting of 10 stations. Time series ofwater vapor in one hour bins for 10 months is retrieved. The results of 3 stations in southwestern region affected by many monsoons show that the water vapor has large variability in spatial and temporal scales. The water vapor derived from GPS is compared with retrievals from the radiosondes. The GPS PW agrees well with data from radiosondes which indicates GPS PW are correct at this locations. The difference of PW from them is larger when the humidity is higher and more variable in summer. The results of comparison with the NCEP reanalysis PW data show that they are consistent with each other. In the mountain areas where observations are few PW from GPS can be used to validate the PW from numerical model analyses. Finally long-term monitoring water vapor using ground-based GPS is discussing.

Citation Download Citation

Yanmeng Bi, Jietai Mao, Meihua Wang, and Chengcai Li "Remote sensing of atmospheric water vapor in the region of southwest China using GPS", Proc. SPIE 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies, (12 May 2005); https://doi.org/10.1117/12.619754

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