Langfang Meteorological Bureau
本文利用廊坊市大厂县QWF-6000型微波辐射计和北京探空资料,对08时和20时两个时次垂直方向的气温、湿度进行对比检验,结果表明：(1)微波辐射计气温的探测精度显著高于湿度,整层气温均方根误差在5℃以内,相对湿度均方根误差为20%～30%,气温误差随高度的变幅较相对湿度更小,两者相关系数均为正值。(2)1 km以下08时和20时的温度和相对湿度的误差差异显著,08时误差均小于20时,1 km以上气温误差稳定在3℃左右,相对湿度廓线随高度先增大后减小。(3)夏秋季的温度误差总体小于春季和冬季,但夏季近地层误差明显大于其它季节,而相对湿度误差在冬季更为稳定。(4)无雨时08时和20时垂直方向上的温度和相对湿度误差都比较接近,随着雨量的增大误差差异也逐渐增大；相比温度,降雨量级对相对湿度的探测稳定性影响更大。
Using the QWF-6000 Microwave radiometer data of Dachang County, Langfang City and the radiosonde data of Beijing from 2017 to 2020, the temperature and humidity in the vertical direction of 737 groups of effective samples at 08:00 and 20:00 are compared and tested. The results show that: (1) The temperature of the microwave radiometer The detection accuracy of the temperature is significantly higher than that of the humidity, the root mean square error of the whole layer temperature is within 5 °C, the root mean square error of the relative humidity is 20% to 30%, and the variation of the temperature error with height is smaller than that of the relative humidity, and the correlation coefficient between the two is smaller. are all positive values. (2) The errors of temperature and relative humidity at 08:00 and 20:00 below 1 km are significantly different. The errors at 08:00 are all less than 20:00. The temperature error above 1 km is stable at about 3 °C. The relative humidity profile first increases with height and then decrease. (3) The temperature error in summer and autumn is generally smaller than that in spring and winter, but the near-surface error in summer is significantly larger than that in other seasons, while the relative humidity error is more stable in winter. (4) The errors of temperature and relative humidity in the vertical direction at 08:00 and 20:00 are relatively close when there is no rain, and the error difference gradually increases with the increase of rainfall; compared with temperature, the detection of relative humidity by rainfall magnitude is stable Sex has a bigger impact.