中国科学院东北地理与农业生态研究所李晓峰的团队近日取得一项新成果。经过不懈努力，他们报道了1987-2018年吉林西部积雪深度的时空变化。相关论文于2024年3月1日发表在《中国地理科学》杂志上。

据悉，由于全球气候变暖，季节性积雪是全球气候和水文系统的一个重要组成部分，并引起了人们的广泛关注。然而，由于自然条件的限制和观测的稀少，对吉林西部地区的积雪时空格局的研究具有一定的挑战性。

基于此，本研究对1987—2018年积雪覆盖的精细分辨率被动微波(PMW)积雪深度(SD)数据进行了时空格局分析，揭示了气候因子对积雪深度变化的潜在影响。结果表明：冬季积雪期SD的年际变化在2.90-9.60 cm之间，年平均SD呈轻微增加的趋势(P >0.05)，速率为0.009 cm/yr。在融雪期，积雪对土壤体积水分的增加有一定的贡献，而SD的变化受气温的影响显著。12月和3月，SD与气温呈负相关关系，与降水呈正相关关系。3月份，镇赉、大安、迁安、前郭县的相关系数均超过0.5。10月，吉林西部地区的SD与降水呈负相关关系，11月和4月，个别分区的SD与降水呈负相关关系。

附：英文原文

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

Author: Wei, Yanlin, Li, Xiaofeng, Gu, Lingjia, Zheng, Zhaojun, Zheng, Xingming, Jiang, Tao

Issue&Volume: 2024-03-01

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.

DOI: 10.1007/s11769-023-1400-y

Source: https://link.springer.com/article/10.1007/s11769-023-1400-y