地基微波辐射计反演产品在青海省东部适应性研究

doi:10.13866/j.azr.2019.02.11

摘要/Abstract

摘要： 利用2013年青海省东部西宁站(08:00和20:00两个时次)探空观测资料和同址MP-3000A型微波辐射计反演数据,分析了该地区大气温度和相对湿度的垂直分布特征,讨论了微波辐射计的反演效果,并对温度偏差较大的月份进行偏差订正。结果表明:① 从高度来看,微波辐射计对低层温湿度反演明显优于高层。微波辐射计反演和探空探测年平均温度相关系数随高度上升基本呈现递减的趋势,最大在近地面,为0.988;最小在距地10 km处,为0.529,且通过了0.01水平的显著性检验。而年平均相对湿度相关系数仅3.0 km以下通过了0.01水平的显著性检验。② 从季节来看,春、夏、秋季温湿度的微波辐射计反演与探空吻合度明显好于冬季。春、夏、秋季温度相关系数均通过0.01水平的显著性检验。春、夏、秋季相对湿度的相关系数在地面到2.0 km处通过0.01水平的显著性检验,而冬季在1.5 km以下通过0.01水平的显著性检验。③ 应用订正方程对温度偏差较大的月份进行了偏差订正,效果较好。

关键词: 微波辐射计, 探空, 温度, 相对湿度, 订正, 青海

Abstract: The vertical distribution characteristics of temperature and relative humidity (RH) in Xining region were analyzed using the data of radiosonde (at 08:00 and 20:00, BT) and the corresponding MP-3000A microwave radiometer over Xining in east Qinghai Province in 2013. The inversion effect of the microwave radiometer was discussed, and the correction of temperature in the months with high deviation was made. The results are as follows: ① The inversion of low-layer temperature and RH from the microwave radiometer was obviously superior to that of high layer. The correlation coefficient of annual mean temperature was in a decrease trend with the increase of height. The maximum value (0.988) occurred at the surface layer, and the minimum one (0.529) at 10 km height from the ground. The correlation coefficient of annual mean RH below 3 km height passed a significance test at 0.01 level; ② In spring, summer and autumn, the matching of temperature and RH between microwave radiometer and radiosonde was significantly better than that in winter. The correlation coefficients of temperature passed a significant test at 0.01 level in the three seasons. The correlation coefficients of RH in the three seasons were passed the significance test from the ground surface to 2 km height, but the correlation coefficient of RH in winter was passed below 1.5 km; ③ The correction equation was used to correct the bias in the months with large temperature deviation, and the effect was good.

Key words: microwave radiometer, radiosonde, temperature, relative humidity, correction, Qinghai Province

康晓燕, 张博越, 田建兵, 刘娜, 马学谦. 地基微波辐射计反演产品在青海省东部适应性研究[J]. 干旱区研究, 2019, 36(2): 356-364.

KANG Xiao-yan, ZHANG Bo-yue, TIAN Jian-bing, LIU Na, MA Xue-qian. Applicability of Products Rretrieved from Microwave Radiometer in East Qinghai Province[J]. Arid Zone Research, 2019, 36(2): 356-364.

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