| Cite this article: | 杨亮彦,石磊,孔辉.2000—2019年毛乌素沙地地表温度演变规律及影响因素分析[J].灌溉排水学报,0,():-. |
| Yang Liangyan,Shi Lei,Kong Hui.2000—2019年毛乌素沙地地表温度演变规律及影响因素分析[J].灌溉排水学报,0,():-. |
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| Analysis of the Evolution Law and Influencing Factors of the Land Surface Temperature in Mu Us Sandy Land from 2000 to 2019 |
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Yang Liangyan, Shi Lei, Kong Hui
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Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd.
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| Abstract: |
| 【Objective】In order to clarify the evolution pattern of surface temperature and its influencing factors in Mu Us Sandy Land under the background of global climate change and the implementation of the project of returning farmland to forest and grass. 【Methods】 Based on the monthly synthetic products of MOSLT1M China 1km surface temperature from 2000—2015 provided by Geospatial Data Cloud and the surface temperature of MOD11A2 from MODIS/TERRA satellite downloaded at NASA from 2016—2019, we used linear regression slope method was used to analyze the spatial and temporal characteristics of surface temperature in the Mu Us Sandy Land from 2000—2019, and to explore the correlation between surface temperature and climate, land use type and vegetation index. 【Results】 The spatial distribution of surface temperature in the Mu Us Sandy Land showed significant variability, with a general trend of gradually decreasing from northwest to southeast and higher in the west than in the east, and an overall decreasing trend in the time series, with a decline rate of 0.59 ℃/(10a); the annual average surface temperature and temperature fluctuation trends in the Mu Us Sandy Land were relatively consistent, and the two fluctuated in the time periods of 2000—2005, 2005—2009 and 2009—2013. The surface temperature is influenced by the change of land use types, and the difference of surface temperature of different land use types is obvious, the surface temperature of construction land and unused land is the highest, followed by grassland and forest land, and finally cultivated land and water; the trend of surface temperature and The trend of NDVI showed a negative correlation with a coefficient of determination of 0.513 1; the spatial and temporal trends of surface temperature in the Mu Us Sandy Land were different from the gradual warming trend of global climate change, and the main reason was that human activities changed the land use types and increased the local vegetation cover. 【Conclusion】 The spatial and temporal variation of surface temperature in the Mu Us Sandy Land is the result of the joint influence of human activities and climate change, and human activities is the dominant factor in the period 2000-2019. |
| Key words: Mu Us Sandy Land; land surface temperature; climate change; human activities |
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