塔里木东风低空急流特征分析

doi:10.13866/j.azr.2021.05.03

Abstract

Abstract:

The low-level jet has an important effect on the occurrence and development of events such as rainstorms, sandstorms, and severe convection. We analyzed conventional sounding data from 1981 to 2020 to determine the characteristics of the low-level jet in the east wind of Tarim. Our findings reveal that, from 1981 to 2020, there was a decreasing trend in the days, mean wind speed, and vertical wind shear of the easterly low-level jet, whereas there was an increasing trend in the mean height of this jet. The easterly low-level jet in Tarim occurred on 74.2 days per year, on average. The low-level jet of the East wind appears 74.2 days per year, its annual average wind speed is 16.3 m·s^-1, and its average height is 1555.1 m. The vertical wind shear in the upper layer was 9.94×10^-3 s^-1 and that in the lower layer was 7.33×10^-3 s^-1. The number of days, wind speed, and vertical wind shear were highest in spring, followed by summer, and lowest in winter, whereas the height was greatest in winter, followed by autumn, and lowest in spring. There was a considerable monthly difference in the low-level easterly jet in Tarim; the days and vertical wind shear of the upper layer were at the maximum in May and the minimum in December. The average wind speed was at its maximum in May and its minimum in December. The average height was greatest in January and lowest in April. The vertical wind shear at the lower level was at its maximum in April and its minimum in December. The average duration of the easterly low-level jet in Tarim was 2.3 days, with the longest duration in summer and the shortest in winter. There was a rapid decline in the frequency of the easterly low-level jet as the duration increased. The most frequent easterly low-level jets were those that lasted for one day; these accounted for 48% of the total frequency. Those with a duration of less than three days accounted for 76.0% of the total. In conclusion, the easterly low-level jet in Tarim, which is located in the inland arid region, belongs to the large-scale low-level jet, which is different from the low-level jet in China’s monsoon region.

Key words: low-level jet stream, the east wind, Tarim Basin, vertical wind shear

YANG Xia,ZHOU Hongkui,ZHAO Keming,XU Tingting. Analysis of the characteristics of the easterly low-level jet in Tarim[J].Arid Zone Research, 2021, 38(5): 1216-1225.

Figures/Tables 10

Fig. 1

Fig. 2

Tab. 1

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Fig. 8

Fig. 9

References 25

[1]	刘洪波, 何明洋, 王斌, 等. 低空急流的研究进展与展望[J]. 气象学报, 2014, 72(2): 191-206.
	[ Liu Hongbo, He Mingyang, Wang Bin, et al. Progress and prospect of research on low-level jet[J]. Acta Meteorologica Sinica, 2014, 72(2): 191-206. ]
[2]	Farquharson J S. The diurnal variation of wind over tropical Africa[J]. Quarterly Journal of the Royal Meteorological Society, 1939, 65(280): 165-184. doi: 10.1002/qj.49706528004
[3]	Means L L. On thunderstorm forecasting in the central United States[J]. Month Weather Revel, 1952, 80(10): 165-189.
[4]	Bonner W D. Climatology of the low level jet[J]. Month Weather Revel, 1968, 96(12): 833-850.
[5]	Chen G T J, Yu C C. Study of low-level jet and extremely heavy rainfall over northern Taiwan in the Mei-yu season[J]. Month Weather Revel, 1988, 116(4): 884-891.
[6]	陶诗言. 中国之暴雨[M]. 北京: 科学出版社, 1980: 255.
	[ Tao Shiyan. Heavy Rainfalls in China[M]. Beijing: Science Press, 1980: 255. ]
[7]	孙淑清, 马廷标, 孙纪改. 低空急流与暴雨相互关系的对比分析[J]. 气象学报, 1979, 37(4): 36-44.
	[ Sun Shuqing, Ma Tinbiao, Sun Jigai. A comparative analysis of the relationship between low-level jet stream and rainstorm[J]. Acta Meteorologica Sinica, 1979, 37(4): 36-44. ]
[8]	丁治英, 刘彩虹, 沈新勇. 2005—2008年5、6月华南暖区暴雨与高、低空急流和南亚高压关系的统计分析[J]. 热带气象学报, 2011, 27(3): 307-316.
	[ Ding Zhiying, Liu Caihong, Shen Xinyong. Statistical analysis of the relationship between heavy rainfall and high and low level jet stream and South Asian high in May and June in South China from 2005 to 2008 [J]. Journal of Tropical Meteorology, 2011, 27(3): 307-316. ]
[9]	王柯, 何清, 王敏仲, 等. 塔克拉玛干沙漠腹地特征层风场特征[J]. 干旱气象, 2011, 29(3): 302-305.
	[ Wang Ke, He Qing, Wang Minzhong, et al. Wind field feature of characteristic layer in the hinterland of the Taklimakan Desert[J]. Journal of Arid Meteorology, 2011, 29(3): 302-305. ]
[10]	李振山, 陈广庭. 塔克拉玛干沙漠起沙风况[J]. 中国沙漠, 1999, 19(1): 44-46.
	[ Li Zhenshan, Chen Guangting. Effective wind regime in the Taklimakan Desert[J]. Journal of Desert Research, 1999, 19(1): 44-46. ]
[11]	刘华悦, 葛觐铭, 黄建平. 塔克拉玛干低空急流特征分析[J]. 干旱气象, 2015, 33(3): 405-411.
	[ Liu Huayue, Ge Jinming, Huang Jiangping. Characteristics of low level jet over the Taklimakan Desert[J]. Journal of Arid Meteorology, 2015, 33(3): 405-411. ]
[12]	李玲萍, 李岩瑛, 孙占峰, 等. 河西走廊东部沙尘暴特征及地面气象因素影响机制[J]. 干旱区研究, 2019, 36(6): 1457-1465.
	[ Li Lingping, Li Yanying, Sun Zhanfeng, et al. Storm and its affecting meteorological factors in East Hexi Corridor[J]. Arid Zone Research, 2019, 36(6): 1457-1465. ]
[13]	张海亮, 李火青, 买买提艾力·买买提依明. 新疆夏季行星边界层参数化方案模拟特征研究[J]. 干旱区研究, 2021, 38(1): 154-162.
	[ Zhang Hailiang, Li Huoqing, Ali Mamtimin. Simulation characteristics of planetary boundary layer parameterizations: A case study in Xinjiang during summer[J]. Arid Zone Research, 2021, 38(1): 154-162. ]
[14]	魏倩, 隆霄, 赵建华, 等边界层参数化方案对一次西北地区沙尘天气过程影响的数值模拟研究[J]. 干旱区研究, 2021, 38(1): 163-177.
	[ Wei Qian, Long Xiao, Zhao Jianhua, et al. Impact of boundary layer parameterization schemes on the simulation of a dust event over Northwest China[J]. Arid Zone Research, 2021, 38(1): 163-177. ]
[15]	赛瀚, 苗俊峰. 中国地区低空急流研究进展[J]. 气象科技, 2012, 40(5): 766-771.
	[ Sai Han, Miao Junfeng. A review of recent researches on low-level jet in China[J]. Meteorological Science and Technology, 2012, 40(5): 766-771. ]
[16]	邓子风, 王扣兰, 王政宇. 塔里木东风低空急流与南疆降水[J]. 气象, 1982, 8(2): 7-10.
	[ Deng Zifeng, Wang Koulan, Wang Zhengyu. The easterly low level jet in Tarim and the precipitation in southern Xinjiang[J]. Meteorological Monthly, 1982, 8(2): 7-10. ]
[17]	邓子风. 干旱半干旱地区低空急流特征与暴雨关系的研究[J]. 新疆气象, 1990, 13(12): 1-8.
	[ Deng Zifeng. Study on the relationship between the characteristics of low level jet stream and rainstorm in arid and semi-arid regions[J]. Xinjiang Meteorology, 1990, 13(12): 1-8. ]
[18]	张家宝, 邓子风. 新疆降水概论[M]. 北京: 气象出版社, 1987: 400.
	[ Zhang Jiabao, Deng Zifeng. Xinjiang Precipitation Generality[M]. Beijing: China Meteorology Press, 1987: 400. ]
[19]	张家宝, 苏起元, 孙沈清, 等. 新疆短期天气预报指导手册[M]. 乌鲁木齐: 新疆人民出版社, 1986: 456.
	[ Zhang Jjiabao, Su Qiyuan, Sun Shenqin, et al. Guide Handbook on Xinjiang Short-Term Weather Forecast[M]. Urumqi: Xinjiang People’s Press, 1986: 456. ]
[20]	张丙午. 暖湿东风过程及其与新疆暴雨的关系[J]. 新疆气象, 1979, 3(2): 1-6.
	[ Zhang Bingwu. The process of warm and wet east wind and its relationship with rainstorm in Xinjiang[J]. Xinjiang Meteorology, 1979, 3(2): 1-6. ]
[21]	孙颖姝. 低空急流与新疆强降水的关系[D]. 南京: 南京信息工程大学, 2019.
	[ Sun Yingshu. The Relationship between Low-level Jet and Heavy Precipitin in Xinjiang[D]. Nanjing: Nanjing University of Information Science & Technology, 2019. ]
[22]	闫昕旸, 张强, 张文波, 等. 泛中亚干旱区气候变化特征分析[J]. 干旱区研究, 2021, 38(1): 1-11.
	[ Yan Xinyang, Zhang Qiang, Zhang Wenbo, et al. Analysis of climate characteristics in the Pan-Central-Asia arid region[J]. Arid Zone Research, 2021, 38(1): 1-11. ]
[23]	朱乾根, 朱谦阳. 大、中尺度低空急流与暴雨[J]. 南京气象学院学报, 1982(2): 168-177.
	[ Zhu Qiangen, Zhu Qianyang. Large-and meso-scale Low-level jet and Heavy rain[J]. Journal of Nanjing Institute of Meteorology, 1982 (2): 168-177. ]
[24]	赛瀚, 苗俊峰. 环渤海地区低空急流的时空分布特征[J]. 自然灾害学报, 2012, 21(6): 91-98.
	[ Sai Han, Miao Junfeng. Spatiotemporal distribution characteristics of low level jet over Bohai Sea rim[J]. Journal of Natural Disasters, 2012, 21(6): 91-98. ]
[25]	王蕾, 张文龙, 周军. 中国西南低空急流活动的统计分析[J]. 南京气象学院学报, 2003, 26(6): 797-805.
	[ Wang Lei, Zhang Wenlong, Zhou Jun. Statistical analysis of the activity of low-level jet stream over southwest China[J]. Journal of Nanjing Institute of Meteorology, 2003, 26 (6): 797-805. ]

月份	日数 /[d·(10a)^-1]	风速 /[m·s^-1·(10a)^-1]	高度 /[m·(10a)^-1]	高层切变 /[10^-3 s^-1·(10a)^-1]	低层切变 /[10^-3 s^-1·(10a)^-1]
1	-0.039	-0.608	4.500	-0.709	-1.009^*
2	-0.089	-0.344	56.331	-0.306	-0.126
3	-0.575^**	-0.201	-12.41	-0.402^*	-1.118^**
4	0.129	-0.303	-3.880	-0.261	-1.462^**
5	-0.075	0.147	11.766	0.014	-1.314^**
6	-0.023	0.003	19.309	-0.102	-1.157^**
7	-0.013	-0.223	23.462	-0.126	-0.900^**
8	-0.183	-0.211	-3.793	-0.170	-0.092
9	0.124	-0.15	-8.042	-0.136	-0.708^*
10	0.060	-0.187	-1.426	-0.003	-0.763
11	-0.076	-1.162^*	-107.407^*	-0.684	-0.534
12	0.310^*	0.335	163.177^*	0.852^*	0.347

Analysis of the characteristics of the easterly low-level jet in Tarim

RichHTML

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 10

References 25

Related Articles 6

Metrics

Comments

Recommended 0

[1]	ZHU Congzhen,ZHAO Tianliang,MENG Lu,YANG Xinghua,HE Qing,Ali MAMTIMIN. Objective weather classification of persistent floating dust weather in the Tarim Basin [J]. Arid Zone Research, 2023, 40(9): 1391-1403.
[2]	CHENG Hongxia, LIN Yuejiang, CHEN Peng, LIANG Fengchao, WANG Yong. Spatial characteristics of sand-dust weather days and influencing factors in the Tarim Basin [J]. Arid Zone Research, 2023, 40(11): 1707-1717.
[3]	LI Zehou,LI Ruixi,ZHANG Shubin,WANG Chongbin,ZHENG Mingming,DONG Yeqing,WU Xue. Responses of leaf structural and chemical trait of Tamarix ramosissima to soil water changes [J]. Arid Zone Research, 2022, 39(5): 1486-1495.
[4]	SUN Congjian,CHEN Wei,WANG Shiyu. Stream component characteristics of the inland river basin of the Tarim Basin under regional climate change [J]. Arid Zone Research, 2022, 39(1): 113-122.
[5]	ZHANG Dong-Dong, JIN Zheng-Zhong, XU Xin-Wen, LI Sheng-Yu, LEI Jia-Qiang, WANG Yong-Dong, WANG Ying-Ju. Study on Water Holding Capacity of Litters in Shelterbelt along the Tarim Desert Highway [J]. , 2012, 29(6): 1046-1053.
[6]	LI Qiao，ZHOU Jin-long，LI Xian-wen，GUO Xiao-jing，ZHAO Yu-jie. Leaching through Spring Drip Irrigation under Film in Cotton Field [J]. , 2012, 29(1): 167-172.