| 基于气象卫星的青藏高原低涡识别 |
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| 引用本文： | 任素玲,方翔,卢乃锰,刘清华,李云.基于气象卫星的青藏高原低涡识别[J].应用气象学报,2019,30(3):345-359. |
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| 作者姓名： | 任素玲 方翔 卢乃锰 刘清华 李云 |
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| 作者单位： | 1.国家卫星气象中心, 北京 100081 |
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| 基金项目： | 公益性行业（气象）科研专项（GYHY2013060171），高原与盆地暴雨旱涝灾害四川省重点实验室开放研究基金（SZKT2016001）， 国家自然科学基金重大研究计划项目（91637105） |
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| 摘 要： | 利用长时间序列气象卫星及多源数据，研究青藏高原低涡综合识别方法，完成低涡数据集并与青藏高原低涡年鉴中低涡位置、路径和分布进行对比分析。研究表明:卫星识别多年平均低涡分布存在两个高值区，分别位于西藏的中北部和青海西南部及青藏高原西部，在有探空站的青藏高原东部（90°E以东），卫星识别低涡高值区和年鉴数据吻合，冬半年，卫星识别低涡活动明显高于年鉴，主要为青藏高原西部低涡活动引起，逐年及2008年低涡路径对比也显示，有探空站区域卫星识别低涡和年鉴具有较好的一致性，表明卫星识别低涡在青藏高原东部地区的可信性；2015年青藏高原中西部新增3个探空站，年鉴中90°E以西低涡约占全年低涡总数量的22%，该区域卫星识别低涡和年鉴一致性较高，表明卫星识别低涡在高原中西部的可信性。因此，卫星识别低涡与年鉴低涡在有探空站区域有较好的一致性，可对年鉴中青藏高原东部低涡源地进行追踪，又可识别青藏高原中西部尤其是活跃于冬半年的低涡，是青藏高原年鉴低涡数据的有效补充。
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| 关 键 词： | 青藏高原低涡 卫星云图 青藏高原低涡活动频率 低涡路径 |
| 收稿时间： | 2018/11/8 0:00:00 |
| 修稿时间： | 2019/1/28 0:00:00 |
Recognition Method of the Tibetan Plateau Vortex Based on Meteorological Satellite Data |
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| Ren Suling,Fang Xiang,Lu Naimeng,Liu Qinghua and Li Yun.Recognition Method of the Tibetan Plateau Vortex Based on Meteorological Satellite Data[J].Quarterly Journal of Applied Meteorology,2019,30(3):345-359. |
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| Authors: | Ren Suling Fang Xiang Lu Naimeng Liu Qinghua and Li Yun |
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| Affiliation: | 1.National Satellite Meteorological Center, Beijing 1000812.Heavy Rain and Drought-flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province, Chengdu 610072 |
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| Abstract: | Based on long-term meteorological satellite data and multi-source observation and reanalysis datasets, the recognition method of the Tibetan Plateau vortex is studied. Based on the method, the Plateau weather analysis software is developed and the vortex dataset of almost 30 years is established. The location, track and distribution of low vortexes based on yearbooks and satellite are compared and the origin region, track and seasonal distribution of low vortexes are studied. Results show that the height and wind fields over the Tibetan Plateau of NCEP/NCAR reanalysis dataset are the most consistent with sounding data which can be used to identify the Tibetan Plateau vortex. Climate vortexes from satellite show there are two vortex activity centers located in the east and the west of the Plateau, respectively. In the eastern part of the Plateau with several sounding stations, high value vortex activity centers are coincided with which from yearbooks(east of 90°E).In winter, the frequency of vortex activity from satellite data is obviously higher than that from yearbooks caused by the activity of vortex in the western part of the Plateau. The analysis of annual vortex tracks also show that vortexes from the satellite recognition are in good agreement with that from yearbooks except for the central, western and southern parts of the Plateau without sounding stations, which indicates that vortex data from the satellite recognition is feasible in the eastern part of the Plateau. After three new sounding stations are built in the central and western part of the Plateau in 2015, vortexes in yearbook show there are several vortexes to the west of 90°E near new stations which account for about 22% of the total number in 2015. The distribution of vortex from satellite and yearbook is accordant near three new stations which indicates the credibility of vortex data from the satellite recognition in the central and western part of the Plateau. Therefore, vortexes from satellite recognition are consistent with vortexes from yearbooks when there are sounding stations and it also can be used to track the origin of the vortex. At the same time, it also can identify vortexes occurring in western part of the Plateau, especially in winter. It is an effective supplement to the low vortex yearbook datasets. |
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| Keywords: | Tibet Plateau vortex satellite images Tibet Plateau vortex activity frequency vortex track |
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