数字农科院2.0

Interannual Spatiotemporal Variations of Land Surface Temperature in China From 2003 to 2018

文献类型： 外文期刊

作者： Yanru Yu;Si-Bo Duan;Zhao-Liang Li;Sheng Chang;Zefeng Xing;Pei Leng;Maofang Gao

作者机构：

关键词： Land surface temperature; Moderate Resolution Imaging Spectroradiometer (MODIS); spatiotemporal variation; trend analysis

期刊名称： IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens.

ISSN： 1939-1404

年卷期： 2021 年 14 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： Land surface temperature (LST) is a comprehensive embodiment of surface energy balance and land surface processes. The spatial and temporal variation of LST is of great significance for studying surface characteristics and climate change. In this study, the spatiotemporal variations of LST in China from 2003 to 2018 is examined by using the continuous and derivable annual temperature cycle model. The trends of the annual mean and annual amplitude of LST is detected using the Mann-Kendall test and Theil-Sen estimator. In addition, we have further revealed the correlation between normalized difference vegetation index (NDVI) and LST in different land cover types. The results show that the annual mean LST presents a spatial distribution pattern of high values in the southern regions and low values in the northern regions and that the factors of altitude and land cover type also affect the LST's spatial distribution. The annual amplitude of the LST presents a spatial distribution pattern of high values in the northern regions and low values in the southern regions. In the majority of instances, the phase of LST in China was positioned between the 175th and 205th day of each year. Both the annual mean and annual amplitude of the LST have a mean increasing trend in China with a rate of 0.02 K/year, and the areas with large significant changes accounted for 8.6% out of the total area, with a mean rate of approximately 0.05 K/year, in this period. Significant changes in the annual mean LST were correlated with the change in vegetation coverage and the impact of land cover types on the interannual variations of LST is also determined in this study. While the increase in vegetation coverage in barren land exhibits a clearly recognizable upward trend in the annual mean LST, the improved vegetation coverage in the grassland region presents a downward trend in annual mean LST. © 2008-2012 IEEE.

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