【摘要】 积雪对气候高度敏感，能够对气候变化进行响应，对积雪变化的研究具有重要意义。本文基于Landsat 7 ETM SLC、Landsat 8 OLI影像，利用eCongnition面向对象提取与人机交互解译方法提取并分析2000和2020年云南地区积雪分布数据，然后结合23个气象站点、50个插值点在2000—2020年的温度、降水、降雪量和雪深记录、高程数据和等辅助数据，使用一元线性回归分析法、Mann-Kendall趋势检验、突变检测法，进行云南地区积雪分布现状、2000—2020年积雪变化情况及气候响应分析。结果表明：(1)2000年云南地区积雪总面积为1 533.1 km~2,2020年为987.8 km~2,2000—2020年，积雪面积总体减少545.3 km~2。其中积雪减少部分面积为945.6 km~2,积雪增加部分面积为400.300 2 km~2,保持不变的为587.463 3 km~2。(2)云南地区积雪分布与变化表现出显著的空间差异性。积雪面积变化集中分布在28°N—28.5°N和3.6～4.0 km高程范围内，面积分别减少16.2%和14.5%。(3)云南地区的温度和降水均呈显著上升趋势，每10年线性倾向量分别达0.38℃和314.7 mm,与积雪面积变化呈负相关；降雪量和雪深呈弱下降趋势，与积雪总体变化呈正相关。该研究为云南地区积雪空间分布与变化、气候变化趋势提供了支撑数据。更多还原

【Abstract】 Snow cover is highly sensitive to climate and can respond to climate change, and its change study is of great significance. Based on Landsat 7 ETM SLC and Landsat 8 OLI images, the object-oriented extraction and human-computer interaction interpretation methods of eCognition are jointly used for the extraction and analysis of snow distribution data in Yunnan in 2000 and 2020, combined with 23 meteorological stations and 50 interpolation points in 2000—2020 temperature, precipitation, snowfall, snow depth records and elevation data and other auxiliary data, using univariate linear regression analysis and Mann-Kendall trend test. By mutation detection method, the distribution status of snow cover in Yunnan, the change of snow cover in 2000—2020 and the climate response analysis are carried out. The results show that:(1)In 2000, the total snow area in Yunnan was 1 533.1 km~2, in 2000, the total snow area in Yunnan was 987.8 km~2, and in 2000—2020, the snow area decreased by 545.3 km~2. Among them, the snow cover decreased by 945.6 km~2, the snow area increased by 400.300 2 km~2, and 587.463 3 km~2 remained unchanged.(2)The distribution and change of snow cover in Yunnan showed significant spatial differences. The changes in snow cover area were concentrated in the latitude range of 28°N—28.5°N and the elevation range of 3.6～4.0 km, and the area decreased by 16.2% and 14.5%, respectively.(3)The temperature and precipitation in Yunnan showed a significant upward trend, with linear tendency reaching 0.38℃ and 314.7 mm every ten years, respectively, which were negatively correlated with the change of snow cover, and the snowfall amount and snow depth showed a weak downward trend, which was positively correlated with the overall change of snow cover. This study provides supporting data for the spatial distribution and change of snow cover in Yunnan and the trend of climate change.更多还原