中天山北坡中段夏季降水时空变化及与海拔高度的关系——以乌鲁木齐县为例

doi:10.12118/j.issn.1000-6060.2025.082

Abstract

Abstract:

Based on the high-density observation data from 19 meteorological stations (including three national-level meteorological stations and 16 regional automatic meteorological stations) in Urumqi County during the summer of 2016—2024, this study systematically analyzes the spatial and temporal distribution characteristics of summer precipitation and precipitation days in Urumqi County, as well as their corresponding response relationship with altitude. Results revealed that the summer precipitation mainly occurs from June to July, with light rain contributing the most to the precipitation, followed by moderate rain and rainstorms. Although heavy rain only accounts for 7.8% of the summer precipitation days, its contribution toward the summer precipitation is as high as 36.1%, highlighting the high risk of extreme precipitation. In addition, the spatial distribution of the summer precipitation (in days) and precipitation at different levels (in days) exhibited a northeast southwest gradient increase, with high-value precipitation areas located in the mid- to high-mountain ranges, >1600 m above sea level. The precipitation in the front mountain range was relatively low, and the probability of heavy rain events was also low. Summer precipitation (number of days) and altitude had a significant positive correlation. For every 100 m increase in altitude, precipitation increased by 13.1 mm and precipitation days increased by 1.8 days. The maximum precipitation zone existed near an altitude of 2100 m. The research results can provide quantitative basis for the development of cloud water resources, ecosystem restoration, and the optimization of mountain flood warning indicators in the central northern slope of the Central Tianshan Mountains. This study deepens the understanding of the mountain-water cycle mechanism, and the findings can be used to implement water resource management strategies in arid areas of Central Asia.

Key words: precipitation, number of precipitation days, altitude, the central northern slope of the Central Tianshan Mountains

MIAO Yunling, HUO Da, YAO Fang, JIANG Yuan’an. Spatiotemporal variation of summer precipitation on the central northern slope of the Central Tianshan Mountains: A case study of Urumqi County[J].Arid Land Geography, 2025, 48(12): 2122-2131.

Figures/Tables 8

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站类	站名	海拔/m	建站时间（年-月-日）	站类	站名	海拔/m	建站时间（年-月-日）	站类	站名	海拔/m	建站时间（年-月-日）
区域站	托里乡乌拉泊村	1117.2	2013-06-06	区域站	大西沟水管站	1689.0	2013-05-15	国家站	小渠子	1871.9	1956-04-01
	板房沟林管站	1376.4	2013-06-06		萨尔达坂乡	1713.0	2013-05-15		牧试站	1932.5	1978-04-01
	托里乡	1420.0	2013-05-15		水西沟镇水源地	1833.0	2013-05-15		大西沟	3540.5	1958-07-01
	永丰镇	1468.0	1999-05-01		照壁山水库	1844.7	2007-11-09
	板房沟镇中梁村	1569.0	2013-05-15		照壁山大峡谷	1945.0	2012-10-24
	水西沟镇	1600.0	2001-12-01		后峡	2033.0	2008-07-19
	水西沟镇东梁村	1626.0	2013-05-15		后峡冰川站	2129.0	2008-07-19
	乌鲁木齐县站	1656.0	2013-10-01		后峡流水槽	2348.0	2009-09-16

Spatiotemporal variation of summer precipitation on the central northern slope of the Central Tianshan Mountains: A case study of Urumqi County

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