基于MODIS数据的东北地区积雪时空变化
Spatial and Temporal Change in Snow Cover Properties in Northeast China Based on MODIS Data
摘要: 积雪是冰冻圈重要组成部分，冰冻圈各要素的时空变化能够对气候、水文、生物和经济发展产生重要影响。因而，研究和掌握冰冻圈各要素的时空变化规律可以更好地评价气候变化影响、促进区域经济发展和改善人民生产生活。遥感数据可以获取地表冻融状况和积雪覆盖状况，为研究提供了很好的数据基础。因此，本文基于MODIS积雪数据产品构建并分析了东北三省的积雪时长和无积雪冻结日数百分比的时空变化规律，并揭示了冬季温度和降水的关系。结果表明：1) 东北三省地区西北部、东北部以及西南部积雪天数有显著减少的趋势，其他大部分地区积雪时长变化都不明显；2) 中北部和东部有部分地区无积雪日数百分比呈减少趋势，西南部呈显著增加的趋势。冬季温度对积雪变化的具有重要影响。
Abstract: Snow cover is an important part of the cryosphere. The temporal and spatial changes of various elements of the cryosphere have a great impact on climate, hydrology, biology and economic development. Therefore, understanding the temporal and spatial variations in the elements of the cryosphere can better evaluate the impact of climate change, promote regional economic development, and improve people’s production and life. Remote sensing data can obtain surface freezing and thawing conditions and snow cover conditions, providing a good data basis for research. Therefore, based on the MODIS snow cover data product, this paper analyzes the temporal and spatial variation of the snow cover duration and the percentage of snow-free freezing days in the three northeastern provinces of China, and reveals the relationship between winter temperature and precipitation. The results show that: 1) Snow cover duration in the northwest, northeast and southwest of the study area has a significant decreasing trend, and most other areas have no significant changes in snow cover duration; 2) Some areas in the north-central and eastern parts of the country have no snow accumulation. The percentage of snow-free freezing days showed a decreasing trend, with a significant increase in the Southwest. Winter temperature has a great influence on the change of snow cover.
文章引用：王亚茹, 韩瑜佳, 杨盛娜, 张云娜, 郑文宣, 孔超. 基于MODIS数据的东北地区积雪时空变化[J]. 地理科学研究, 2022, 11(3): 272-278. https://doi.org/10.12677/GSER.2022.113028

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