Spatiotemporal Changes of Snow Depth in Western Jilin, China from 1987 to 2018

IF 3.4 2区地球科学 Q2 ENVIRONMENTAL SCIENCES Chinese Geographical Science Pub Date : 2024-04-01 DOI:10.1007/s11769-023-1400-y

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Abstract

Seasonal snow cover is a key global climate and hydrological system component drawing considerable attention due to global warming conditions. However, the spatiotemporal snow cover patterns are challenging in western Jilin, China due to natural conditions and sparse observation. Hence, this study investigated the spatiotemporal patterns of snow cover using fine-resolution passive microwave (PMW) snow depth (SD) data from 1987 to 2018, and revealed the potential influence of climate factors on SD variations. The results indicated that the interannual range of SD was between 2.90 cm and 9.60 cm during the snowy winter seasons and the annual mean SD showed a slightly increasing trend (P > 0.05) at a rate of 0.009 cm/yr. In snowmelt periods, the snow cover contributed to an increase in volumetric soil water, and the change in SD was significantly affected by air temperature. The correlation between SD and air temperature was negative, while the correlation between SD and precipitation was positive during December and March. In March, the correlation coefficient exceeded 0.5 in Zhenlai, Da’an, Qianan, and Qianguo counties. However, the SD and precipitation were negatively correlated over western Jilin in October, and several subregions presented a negative correlation between SD and precipitation in November and April.

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1987 至 2018 年中国吉林西部积雪深度的时空变化

摘要季节性积雪是全球气候和水文系统的重要组成部分，在全球变暖的条件下备受关注。然而，在中国吉林西部，由于自然条件和观测稀少，雪盖的时空格局具有挑战性。因此，本研究利用1987-2018年的精细分辨率被动微波雪深（SD）数据研究了积雪的时空格局，并揭示了气候因素对SD变化的潜在影响。结果表明，在冬季多雪季节，SD的年际变化范围在2.90厘米至9.60厘米之间，年平均SD以0.009厘米/年的速率呈小幅上升趋势（P >0.05）。在融雪期，积雪导致土壤容积水量增加，SD 的变化受到气温的显著影响。在 12 月和 3 月期间，SD 与气温呈负相关，而 SD 与降水呈正相关。3 月份，镇赉县、大安县、乾安县和前郭县的相关系数超过了 0.5。然而，10 月吉林西部的 SD 与降水呈负相关，11 月和 4 月的 SD 与降水呈负相关。

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来源期刊

Chinese Geographical Science 环境科学-环境科学

CiteScore

6.10

自引率

5.90%

发文量

审稿时长

3.0 months

期刊介绍： Chinese Geographical Science is an international journal, sponsored by Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, and published by Science Press, Beijing, China. Chinese Geographical Science is devoted to leading scientific and technological innovation in geography, serving development in China, and promoting international scientific exchange. The journal mainly covers physical geography and its sub-disciplines, human geography and its sub-disciplines, cartography, remote sensing, and geographic information systems. It pays close attention to the major issues the world is concerned with, such as the man-land relationship, population, resources, environment, globalization and regional development.