TY -的A2 Hashiguchi Hiroyuki盟——曾永盟——杨Lianmei盟通,Zepeng盟——张Zuyi PY - 2020 DA - 2020/12/21 TI -应用程序的多个检测数据分析新疆暴风雪过程中亚极端降水观测测试期间(CAEPOT) SP - 8845667六世- 2020 AB -目前,干旱地区冬季暴风雪系统垂直结构的细化研究不足，与中国中东部相比，西北干旱地区的观测站点较少。为了加深对西北地区暴雪动力学和微物理过程的认识，提高西北地区暴雪预报预警水平，中国气象局乌鲁木齐沙漠气象研究所在新疆伊犁开展了中亚极端降水观测试验(CAEPOT)。2020年2月为中国典型干旱地区。本文利用CAEPOT的风廓线雷达、地面微波辐射计和毫米波云雷达等多个精细探测数据集，分析了新疆雪灾系统的宏观特征和微物理变化。研究表明，在此次暴雪中，一个水汽、热量、动力充足、带状云系统减弱的低空槽是此次暴雪的关键影响系统，该低空槽由咸海东移至新疆西部。暴雪前，水平风场垂直切变严重，加剧了大气的不稳定性，低层大气有上升运动。相关的各种物理量的水分增加趋势在较低的水平,可以作为早期预警信号因暴风雪而提前约8小时,雪和云粒子云毫米波雷达同时观察到发展中向上和向下4公里,提前12小时提供暴风雪预警。暴雪期间，水平风速和垂直风速明显增强，与水汽有关的物理量进一步增加，随着天山的阻塞和抬升，暴雪增加。 The particles collided and grew while falling, resulting in a decrease in particle concentration and an increase in particle radius from high altitude to the ground, eventually resulting in near-ground reflectivity factor up to 30 dBz. In addition, reflectivity factor, physical quantities related to moisture, wind field, particle concentration, and particle radius all had a good correspondence with the beginning, end, and intensity of snowstorm, so when the physical quantities mentioned above weakened and stopped, snowstorm also weakened and stopped. In a word, this research is an important and meaningful work that provides more backgrounds and references for the forecast and warning of snowstorm in northwestern China. SN - 1687-9309 UR - https://doi.org/10.1155/2020/8845667 DO - 10.1155/2020/8845667 JF - Advances in Meteorology PB - Hindawi KW - ER -