昆仑山北坡区域积雪时空变化特征

doi:10.12118/j.issn.1000-6060.2024.115

Abstract

Abstract:

Snow cover is an essential component of the water cycle, and the accumulation and melting of snow have significant impacts on socio-economic development downstream. This study employs trend analysis, correlation analysis, and other methods to analyze the spatiotemporal distribution characteristics and trends of snow cover area and snow cover days (SCD) on the northern slope of Kunlun Mountain of Xinjiang, China from 2000 to 2020. It also examines the elevation effect and the impact of climate on snow cover. The results indicate: (1) From 2000 to 2020, the snow cover area showed a decreasing trend (-152.4 km²·a^-1), with a positive anomaly before 2010 and a negative one after. (2) On a monthly scale, the snow cover percentage (SCF) showed a trend of initially increasing and then decreasing from August to the following July, being higher in winter and spring than in summer and autumn. (3) The distribution of SCD exhibits obvious spatial heterogeneity, with changes in the middle region affecting the annual total number of SCD in the area. (4) The average number of SCD per year from 2000 to 2020 increased with elevation, reaching 331.6 d at elevations above 6.0 km, suggesting perennial snow at high altitudes. (5) Temperatures are significantly negatively correlated with the snow cover area (correlation coefficient -0.68, P<0.01), while precipitation is not significantly positively correlated with the snow cover area (correlation coefficient 0.14, P>0.05), and temperature has a stronger impact on snow cover than precipitation.

Key words: MODIS, snow cover area, snow cover days, elevation effect, climate change, northern slope of Kunlun Mountains

KANG Limin, TENG Xinru, CHE Jiahang, HUAI Baojuan. Spatiotemporal variations of snow cover on the northern slope of Kunlun Mountains[J].Arid Land Geography, 2024, 47(9): 1462-1471.

Figures/Tables 8

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Spatiotemporal variations of snow cover on the northern slope of Kunlun Mountains

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