Journal of Arid Meteorology ›› 2024, Vol. 42 ›› Issue (6): 910-921.DOI: 10.11755/j.issn.1006-7639-2024-06-0910
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YAN Ruotong1(), DENG Fengdong1, XU Dongbei2(
), MAI Zhening3
Received:
2024-02-27
Revised:
2024-04-23
Online:
2024-12-31
Published:
2025-01-15
通讯作者:
许东蓓(1968—),女,教授,主要从事天气动力学及灾害性天气形成机制研究。E-mail:xdb@cuit.edu.cn。
作者简介:
燕若彤(1998—),女,助理工程师,主要从事雷达气象观测与应用和灾害性天气形成机制研究。E-mail:yanrt199804@163.com。
基金资助:
CLC Number:
YAN Ruotong, DENG Fengdong, XU Dongbei, MAI Zhening. Analysis of the occurrence rules of the moving-out vortex over the Qinghai-Xizang Plateau and the differences in the development mechanism of typical cases in warm seasons[J]. Journal of Arid Meteorology, 2024, 42(6): 910-921.
燕若彤, 邓凤东, 许东蓓, 麦哲宁. 青藏高原暖季移出型低涡发生规律及典型个例发展机制的差异分析[J]. 干旱气象, 2024, 42(6): 910-921.
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URL: http://www.ghqx.org.cn/EN/10.11755/j.issn.1006-7639-2024-06-0910
Fig.1 The inter-annual variation of the standardized anomaly of the frequency of the moving-out Qinghai-Xizang Plateau vortex (MQXPV) (a, c, e, g, i, k) and the wavelet power spectrum distribution of the frequency of the MQXPV (b, d, f, h, j, l) in warm seasons from 1990 to 2019 (a, b) from May to September, (c, d) May, (e, f) June, (g, h) July, (i, j) August, (k, l) September (The areas enclosed by black solid lines indicate the values passing the 95% confidence level)
Fig.2 The source distribution of the MQXPV in warm seasons from 1990 to 2019 (a) from May to September, (b) May, (c) June, (d) July, (e) August, (f) September (The green solid line is the boundary line of the Qinghai-Xizang Plateau, the same as below)
Fig.3 The potential height difference field (a, c) and flow field difference field (b, d) between the more and less years of the MQXPV at 200 hPa (a, b) and 500 hPa (c, d) in warm seasons from 1990 to 2019
Fig.4 The movement path (black dashed line) and precipitation distribution (the color shaded, Unit: mm) of the development MQXPV (a) and weakening MQXPV (b) (The black dots indicate the location of the Qinghai-Xizang Plateau vortex, the same as below)
Fig.5 The longitude-height sections of vorticity along the latitude (a, 32.50°N; b, 32.25°N; c, 32.25°N; d, 35.00°N) of the center of the development MQXPV at 15:00 on 7 July (a), 03:00 on 8 July (b), 15:00 on 8 July (c), 03:00 on 9 July (d) 2017 (Unit: 10-5s-1) (The gray shaded represents the terrain, the same as below)
Fig.6 The longitude-height sections of vorticity along the latitude (a, 33.00°N; b, 33.00°N; c, 33.50°N; d, 34.75°N) of the center of the weakening MQXPV at 18:00 on 20 July (a), 00:00 on 21 July (b), 06:00 on 21 July (c), 12:00 on 21 July (d) 2013 (Unit: 10-5s-1)
Fig.7 The longitude-height sections of frontogenesis function (the color shaded, Unit: 10-9 K·m-1·s-1) and temperature advection (isolines, Unit: 10-4 K·s-1) along the latitude (a, 32.50°N; b, 32.25°N; c, 32.25°N; d, 35.00°N) of the center of the development MQXPV at 15:00 on 7 July (a), 03:00 on 8 July (b), 15:00 on 8 July (c), 03:00 on 9 July (d) 2017
Fig.8 The longitude-height sections of frontogenesis function (the color shaded, Unit: 10-9 K·m-1·s-1) and temperature advection (isolines, Unit: 10-4 K·s-1) along the latitude (a, 33.00°N; b, 33.00°N; c, 33.50°N; d, 34.75°N) of the center of the weakening MQXPV at 18:00 on 20 July (a), 00:00 on 21 July (b), 06:00 on 21 July (c), 12:00 on 21 July (d) 2013
Fig.9 The spatial distribution of potential vorticity (the color shaded, Unit: PVU, 1 PVU=10-6 K·m2·s-1·kg-1) and wind field (wind vectors,Unit:m·s-1) at 500 hPa during the development MQXPV activity process at 15:00 on 7 July (a), 03:00 on 8 July (b), 15:00 on 8 July (c), 03:00 on 9 July (d) 2017
Fig.10 The longitude-height sections of potential vorticity along the latitude (a, 32.50°N; b, 32.25°N; c, 32.25°N; d, 35.00°N) of the center of the development MQXPV at 15:00 on 7 July (a), 03:00 on 8 July (b), 15:00 on 8 July (c), 03:00 on 9 July (d) 2017 (Unit: PVU, 1 PVU=10-6 K·m2·s-1·kg-1)
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