华云高精度导航探空仪在甘肃庆阳干旱气候夏季的温湿数据对比分析

Analysis of Temperature and Humidity Data of Huayun High Accuracy Navigation Radiosonde in Arid Climate Summer in Qingyang, Gansu Province

以美国国家环境预报中心(NCEP)的FNL(Final)分析场为对比场,分析评估甘肃庆阳地区2017年5—9月的探空温湿数据的质量。通过分析,得出结论:1)探空的温度数据质量较高,表现了很好的一致性,细微结构清晰,误差基本在±0.5 ℃以内;2)探空的湿度数据质量较好,一致性相对温度略差,误差基本在±10%以内,夜间偏湿,下午偏干;3)无论是温度数据还是湿度数据,它们的观测余差都现随气压减小呈现先增加后减小的趋势;4)无论是温度还是湿度,02时误差最小,数据质量最佳,08时和14时的质量相当。

In this paper,the quality of sounding data for the period from May to September 2017 in Gansu Qingyang region was analyzed and evaluated by comparing with the background of FNL analysis fields of NCEP in the United States.The conclusions are drawn as follows:(1)the temperature data of soundings are of high quality and show good consistency.The detailed structure is clear and the error is within±0.5°C;(2)the humidity data of soundings are of good quality,their consistency is slightly worse than that of the temperature,and the error is basically within±10%,with wet at night,dry in the afternoon;(3)whether it is temperature data or humidity data,their observed residuals show a trend of increasing first and then decreasing with decreasing pressure;(4)no matter the temperature or humidity,the error is the smallest at the 2 o'clock and the data quality is the best.The quality is comparable at 08 o'clock and 14 o'clock.