On the Detection of Hail Using Satellite Passive Microwave Radiometers and Precipitation Radar
On the Detection of Hail Using Satellite Passive Microwave Radiometers and Precipitation Radar
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DOI：
10.1175/jamc-d-17-0065.1
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发表时间：
2017-10
影响因子：
3
通讯作者：
X. Ni;Chuntao Liu;D. Cecil;Qinghong Zhang
中科院分区：
文献类型：
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作者：
X. Ni;Chuntao Liu;D. Cecil;Qinghong Zhang
摘要：在之前的研究中，已经使用各种星载传感器讨论了冰雹的遥感特性。冰雹发生与强被动微波亮度温度降低之间的关系已经确定。利用源自热带降雨测量任务 (TRMM) 卫星的 16 年降水特征数据库，进一步研究了 TRMM 降水雷达和 TRMM 微波成像仪在冰雹检测方面的性能。大于 19 毫米的冰雹的检测标准是根据 Ku 波段雷达反射率和降水特征的微波亮温特性分别制定的，这些特性与美国东南部和中南部的地表冰雹报告相结合。研究发现-22°C 下的 44 dBZ 阈值具有最高的关键成功指数和 Heidke 技能得分。 37 GHz 时 230 K 的阈值在无源微波特性中获得了最佳分数。使用这两个阈值，可能的全局分布......
AbstractIn previous studies, remote sensing properties of hailstorms have been discussed using various spaceborne sensors. Relationships between hail occurrence and strong passive microwave brightness temperature depressions have been established. Using a 16-yr precipitation-feature database derived from the Tropical Rainfall Measuring Mission (TRMM) satellite, the performance of the TRMM Precipitation Radar and TRMM Microwave Imager is further investigated for hail detection. Detection criteria for hail larger than 19 mm are separately developed from Ku-band radar reflectivity and microwave brightness temperature properties of precipitation features that are collocated with surface hail reports over the southeastern and south-central United States. A threshold of 44 dBZ at −22°C is found to have the highest critical success index and Heidke skill score. The threshold of 230 K at 37 GHz yields the best scores among passive microwave properties. Using these two thresholds, global distributions of possible ...