Abstract:In this study, the global geodetic observing system (GGOS) atmosphere grid atmospheric weighted mean temperature (Tm) products and radiosonde profiles in 2015 are treated as reference values to investigate the Tm derived from the GPT2w model in China. The results are: (1) the performance of GPT2w model with 1-degree resolution is better than those with 5-degree resolution, and the significant systematic errors are observed for GPT2w model in China; (2) the bias and RMS error of the Tm have obvious spatio-temporal variations, both bias and RMS present larger values in spring and winter days and smaller ones in summer days; furthermore, the RMS value of GPT2w model increases with latitude in China; (3) additionally, larger errors exist in parts of western and northeastern China, mainly due to the highly undulating terrain and the significant diurnal variations of Tm.
HUANG Liangke,LI Chen,WANG Haoyu et al. Precision Analysis of the Tropospheric Weighted Mean Temperature Derived from GPT2w Model over China[J]. jgg, 2019, 39(5): 496-201.