| 台风天气条件下地基微波辐射计反演产品精度分析 |
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| 作者姓名： | 骆梦洁 汤杰 陈叙捷 陈勇航 赵兵科 史文浩 严嘉明 刘统强 林立旻 陈泉 |
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| 作者单位： | 东华大学,上海 201600;中国气象局上海台风研究所,上海 200030;霞浦县气象局,福建 霞浦 355100 |
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| 基金项目： | 科技部重点研发计划项目(2018YFC1506303,2018YFC1506305)；科技部重点研发计划国际合作专项(2017YFE0107700)；国家自然科学基金项目(41775065,41475060,41805088) |
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| 摘 要： | 利用中国气象局上海台风研究所台风试验获取的4个典型台风个例数据,对地基微波辐射计反演的温度、水汽密度廓线与同址GP S探空资料得到的廓线进行对比分析,发现二者的温度、水汽密度相关系数分别为0.988、0.928.微波辐射计的探测精度在不同高度上有很大差异,整体来说,在高层温度探测精度较优于低层,而在低层水汽密度探测精度...
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| 关 键 词： | 微波辐射计 GPS探空 台风 温湿廓线 |
Accuracy analysis of ground-based microwave radiometer retrieval products under typhoon weather conditions |
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| Authors: | LUO Mengjie TANG Jie CHEN Xujie CHEN Yonghang ZHAO Bingke SHI Wenhao YAN Jiaming LIU Tongqiang LIN Limin CHEN Quan |
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| Institution: | Donghua University, Shanghai 201600 , China;Shanghai Typhoon Institute of China Meteorological Administration, Shanghai 200030 , China;Xiapu Meteorological Bureau, Xiapu 355100 , China |
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| Abstract: | In this paper, the temperature and water vapor density profiles retrieved by the ground-based microwave radiometer are compared with those obtained by GPS sounding data at the same site, using the data of 4 typical typhoon cases obtained by typhoon experiments of Shanghai Typhoon Institute of China Meteorological Administration. It is found the correlation coefficients of temperature and water vapor density are 0.988 and 0.928, respectively. The detection accuracy of the microwave radiometer varies greatly at different heights. On the whole, the detection accuracy of temperature in the upper layer is better than that in the lower layer, while the detection accuracy of water vapor density in the lower layer is better than that in the upper layer. Further research shows that the accuracy of detecting water vapor density is significantly positively correlated with precipitation intensity, but it has no obvious relationship with wind speed or relative typhoon position. Through calculation, the correlation coefficient between the root mean square error of 21 sets of water vapor density profiles and the rainfall intensity in the corresponding period is 0.912. This study quantitatively shows the detection accuracy of temperature by the microwave radiometer under typhoon weather conditions is relatively high, and the observation quality of water vapor density has certain reliability and validity. This study will provide a reliable basis for application of ground-based microwave radiometer in the observation of atmospheric temperature and humidity structures of strong convective synoptic systems such as typhoons and fronts in the future. |
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