中天山北坡冬季降雪变化及其影响因子分析

doi:10.13866/j.azr.2023.01.02

Abstract

Abstract:

Based on the observation data of daily precipitation and temperature elements in winter from 1978 to 2020 from 17 national meteorological stations, the spatial-temporal variation characteristics of winter snowfall and its relationship with meteorological factors in the economic belt on the north slope of the middle Tianshan Mountains were analyzed by using various statistical methods. The results show that: The regional distribution of snowfall days and snowfall amount is similar, showing the distribution characteristics of ‘more urban areas, less mountainous areas’. The decrease of light snow days is the direct reason for the decrease of total snow days, while the significant increase of moderate snow and blizzard is the main reason for the increase of total snowfall. The precipitation process lasting for 1 day is the main snowfall process in winter. With the increase of the duration, the precipitation process decreases significantly, and the precipitation process ≥ 5 days only accounts for 2.8%; In the past 43 years, the climate on the north slope of Tianshan Mountains has shown an obvious warming and humidifying trend. In 1987 and 1994, the amount of snowfall changed from less to more and the average temperature changed from lower to higher; The amount of snowfall is significantly and positively correlated with the annual precipitation, the average minimum temperature in winter, and the number of snowfall days. The greater the annual precipitation, the lower the minimum temperature in winter, and the more snowfall days, the greater the amount of snowfall in winter, and vice versa.

Key words: snowfall of different orders, spatial and temporal distribution, persistent, the north slope of the middle Tianshan Mountains

MIAO Yunling, YU Yongbo, HUO Da, PAN Cunliang, LI Ruqi. Analysis of winter snowfall variability and its influencing factors on the north slopes of the middle Tianshan Mountains[J].Arid Zone Research, 2023, 40(1): 9-18.

Figures/Tables 11

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References 23

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量级	降水量			降水日数
量级	降水量/mm	所占比例/%	气候倾向率 /[mm·(10a)^-1]	日数/d	所占比例/%	气候倾向率 /[d·(10a)^-1]
小雪	12.2	51.7	2.52	16.7	88.4	-0.52
中雪	6.6	28.0	0.22^**	1.6	8.5	-0.87
大雪	3.6	15.3	0.57	0.5	2.6	0.17^*
暴雪	1.2	5.1	1.06^**	0.1	0.5	0.13^**
总降雪	23.6	-	0.65	18.9	-	0.03

		小雪	中雪	大雪	暴雪
丰雪年	降雪量/%	37.2	28.4	19.9	14.5
丰雪年	降雪日/%	82.2	12.8	4.4	0.6
枯雪年	降雪量/%	62.3	29.7	8.0	-
枯雪年	降雪日/%	92.8	6.1	1.1	-

	平均气温	平均最高气温	平均最低气温	降水日数	降水量
冬季	0.08	-0.14	0.27	-0.52	2.52^**
全年	0.35^**	0.31^**	0.45^**	-3.36^**	6.2

	平均气温	平均最高气温	平均最低气温	降水日数	降水量
冬季	0.268	0.153	0.316^*	0.499^**	-
全年	0.217	0.113	0.283	0.259	0.450^**

Analysis of winter snowfall variability and its influencing factors on the north slopes of the middle Tianshan Mountains

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