ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Comparative Analysis and Evaluation of Parallel Observation Data of GTS12 and GTS1 Radiosondes
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Abstract:
Based on the parallel observation data of GTS12 and GTS1 radiosondes from 89 high altitude meteorological observation stations in China and the model forecast field data of CMA-GFS, a comparative analysis and evaluation of the observation data of the two radiosondes on each mandatory level were conducted. The results show that the GTS12 radiosonde and GTS1 radiosonde have good consistency in temperature and geopotential height observation data, the absolute value of bias of temperature and geopotential height are less than 0.5 ℃ and 30.0 gpm except for a few mandatory levels. The relative humidity observation data of GTS12 radiosonde is about4.6 % larger than that of GTS1 radiosonde. For the stability of observation data, there is not much difference between the two types of radiosondes on the middle and lower mandatory levels. On the upper mandatory levels, the temperature and geopotential height of the GTS12 radiosonde are significantly better than those of the GTS1 radiosonde, but the relative humidity is slightly worse than that of the GTS1 radiosonde. The absolute average bias of temperature observed by GTS12 radiosonde and GTS1 radiosonde relative to the CMA-GFS model data is about 0.34 ℃ and 0.44 ℃, respectively. The average root mean square error is about 1.23 ℃ and 1.31 ℃, and the average related coefficient is about 0.908 and 0.916, respectively. The corresponding of geopotential heights are 11.05 gpm and 14.97 gpm, 18.76 gpm and 25.16 gpm, 0.948 and 0.934. The corresponding of relative humidity are 5.26% and 8.59%, 16.19% and 18.44%, 0.687 and 0.627. indicating that the consistency between the observation data of the GTS12 radiosonde and the CMA-GFS model data is better than that of the GTS1 radiosonde.
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