Recognition Method of the Tibetan Plateau Vortex Based on Meteorological Satellite Data

Ren Suling; Fang Xiang; Lu Naimeng; Liu Qinghua; Li Yun

doi:10.11898/1001-7313.20190308

Vol.30, NO.3, 2019

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Article Navigation > Journal of Applied Meteorological Science > 2019 > 30(3): 345-359

Ren Suling, Fang Xiang, Lu Naimeng, et al. Recognition method of the Tibetan Plateau vortex based on meteorological satellite data. J Appl Meteor Sci, 2019, 30(3): 345-359. DOI: 10.11898/1001-7313.20190308.

Citation:

Ren Suling, Fang Xiang, Lu Naimeng, et al. Recognition method of the Tibetan Plateau vortex based on meteorological satellite data. J Appl Meteor Sci, 2019, 30(3): 345-359. DOI: 10.11898/1001-7313.20190308.

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Recognition Method of the Tibetan Plateau Vortex Based on Meteorological Satellite Data

DOI: 10.11898/1001-7313.20190308

1.
National Satellite Meteorological Center, Beijing 100081
2.
Heavy Rain and Drought-flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province, Chengdu 610072

Received Date: 2018-11-08
Rev Recd Date: 2019-01-28
Publish Date: 2019-05-31

Abstract

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.
- Tibet Plateau vortex;
- satellite images;
- Tibet Plateau vortex activity frequency;
- vortex track

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References(33)

Figures and Tables

图 1 青藏高原及周边探空站分布

(阴影表示地形高度不低于3000 m)

Fig. 1 The distribution of meteorological sounding stations over the Tibet Plateau

(the shaded denotes terrain height no less than 3000 m)

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Fig. 2 The average geo-potential height at 200 hPa and 500 hPa of meteorological sounding stations(Dingri, Lasa, Naqu, Linzhi, Changdu) and NCEP/NCAR, JRA-55 and ERA-Interim reanalysis from 2007 to 2016

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Fig. 3 The average wind speed at 200 hPa and 500 hPa of meteorological sounding stations(Dingri, Lasa, Naqu, Linzhi, Changdu) and NCEP/NCAR, JRA-55 and ERA-Interim reanalysis from 2007 to 2016

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Fig. 4 The vertical distribution of horizontal wind at Dingri, Lasa, Naqu, Linzhi, Changdu from 1 Jun to 1 Jul during 2007-2016 (a) and that of Naqu from 1 Jun to 1 Jul in 2008(b) based on observation and NCEP/NCAR, JRA-55, ERA-Interim reanalysis

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Fig. 5 The daily mean vortex activity frequency of the Tibetan Plateau based on Yearbooks(a) and meteorological satellite(b) with monthly mean of the Tibet Plateau vortex genesis(c) from 2001 to 2014

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图 6 2001—2014年平均青藏高原年鉴低涡活动频数(a)和气象卫星识别低涡活动频数(b)分布

(黑点为气象探空站点位置)

Fig. 6 The distribution of the Tibet Plateau vortex activity frequency based on Yearbooks(a) and meteorological satellite(b) from 2001 to 2014

(black dot denotes meteorological sounding station)

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Fig. 7 The monthly mean distribution of the Tibet Plateau vortex activity frequency based on meteorological satellite from 2001 to 2014

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图 8 2008年年鉴低涡路径(a)和气象卫星识别青藏高原低涡路径(b)分布图

(蓝线为3000 m地形高度)

Fig. 8 The Tibet Plateau vortex tracks based on Yearbooks(a) and meteorological satellite(b) in 2008

(blue curve denotes 3000 m topographic height)

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Fig. 9 The Tibet Plateau vortex tracks from the recognition based on meteorological satellite(solid line denotes No.15) and Yearbooks (dash line denotes No.7 and No.8) in 2008

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Fig. 10 The Tibet Plateau vortex tracks of No.15 based on meteorological satellite(solid line), vortex positions based on Yearbook(black dot denotes No.15, black square denotes No.7 and 8), satellite water vapour images(the shaded), geo-potential height at 500 hPa(white contour, unit:dagpm) and sounding wind bar at 0000 UTC 11 May, 1200 UTC 11 May, 1200 UTC 12 May, 1200 UTC 13 May in 2008

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图 11 2015年年鉴低涡(a)与气象卫星识别青藏高原低涡(b)路径分布

(蓝线表示3000 m地形高度，黑色方块表示狮泉河、改则、申扎探空站位置)

Fig. 11 The Tibet Plateau vortex tracks based on Yearbooks(a) and meteorological satellite(b) in 2015

(blue curve denotes 3000 m topographic height, black square denotes Shiquanhe, Gaize and Shenzha meteorological sounding station)

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Table 1 Consistency analysis of the Tibet Plateau vortexes between the recognition based on meteorological satellite and Yearbook in 2008

气象卫星识别低涡编号	年鉴低涡编号	说明
1	无	西部低涡
2	无	西部低涡
3	无	西部低涡
4	1	一致
5	无	弱低涡
6	2	一致
7	无	弱低涡
8	无	西北部低涡
9	3	一致
10	4	一致
11	无	西部低涡
12	5	一致
13	无	南部低涡
14	6	一致
15	7和8	一致
16	无
17	9, 10和11	一致
18	12和13	一致
19	14	一致
20	无	西部低涡
21	无
22	无	西部低涡
23	15和16	一致
24	17和18	一致
25	19和20	一致
26	21	一致
27	22	一致
28	23	一致
29	24	一致
30	25	一致
31	26	一致
32	29	一致
33	无
34	30	一致
35	31	一致
36	33和34	一致
37	无
38	无
39	无
40	36	一致
41	39	一致
42	无
43	无
44	无
45	无
46	无
47	无
48	无
49	无
50	无
51	无	西部低涡

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