| 伊犁河谷初冬降水条件下风廓线雷达评估分析 |
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| 引用本文： | 刘凡,杨莲梅.伊犁河谷初冬降水条件下风廓线雷达评估分析[J].新疆气象,2019,13(5):34-40. |
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| 作者姓名： | 刘凡 杨莲梅 |
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| 作者单位： | 中国气象局乌鲁木齐沙漠气象研究所,中国气象局乌鲁木齐沙漠气象研究所 |
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| 基金项目： | 中亚大气科学研究基金(CAAS201916)；中央级公益性科研院所基本科研业务费(IDM201920)；国家重点研发计划(2018YFC1507102)共同资助。 |
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| 摘 要： | 对伊犁河谷地区初冬降水条件下风廓线雷达资料评估其数据获取率并与探空资料进行对比分析,定义两者风向偏差在10°以内或风速偏差在1 m/s范围的样本为有效样本,分别用E_v和E_d表示风速有效样本比率(风速有效样本数/总样本数)和风向有效样本比率(风向有效样本数/总样本数)。结果显示:超过80%数据获取率的高度,降雨时为3000 m,降雪时达到预设2000 m;降雪时E_v和E_d均比无降水时高,且降雪量大小与风廓线的探测高度呈正相关,降雪量大小对E_d有明显影响,对E_v无明显影响;比较不同高度数据,降雪时0～3 km范围的E_v和E_d值均比无降水时高30%左右,无降水时3～5 km范围的E_d接近100%。
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| 关 键 词： | 风廓线雷达 数据获取率 探空资料 评估分析 |
| 收稿时间： | 2019/6/4 0:00:00 |
| 修稿时间： | 2019/7/5 0:00:00 |
Evaluation and Analysis of Wind Profiler Radar in Early Winter Precipitation Conditions in YiLi Valley |
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| LIU Fan and YANG Lian-mei.Evaluation and Analysis of Wind Profiler Radar in Early Winter Precipitation Conditions in YiLi Valley[J].Bimonthly of Xinjiang Meteorology,2019,13(5):34-40. |
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| Authors: | LIU Fan and YANG Lian-mei |
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| Institution: | Institute of Desert and Meteorology,China Meteorological Administration,Institute of Desert and Meteorology,China Meteorological Administration |
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| Abstract: | On October 20, 2018 solstice November 8, 2018, 2 rainfall processes and 9 snowfall processes captured by wind profile radar deployed in yili valley area, this paper mainly evaluates the data availability rate of snowfall process and conducts comparative analysis with the radiosonde data. The results show that: When rainfall the height of the data availability exceeds 80% is 3000m, and 2000m when snowfall. When the snowfall occurs, the wind profile radar wind direction and wind speed detection precision are higher than those without precipitation, and the snowfall magnitude is positively correlated with the height of wind profile detection. The snowfall magnitude has a significant impact on the wind direction detection precision, and the wind speed detection precision is not Significant impact. Comparing different height data, the low-level detection precision is better when snowfall and the high-level detection precision is poor; when no precipitation, the low-level detection precision is poor, and the high-level detection precision is high. |
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| Keywords: | wind profile radar data availability radiosonde data evaluation analysis |
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