9 October 2007 Analyzing the relationship between land surface temperature and vegetation cover: a case of typical grassland in North China
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Abstract
Land surface temperature (LST) is widely thought to closely relate with vegetation cover (often expressed with VI, i.e. vegetation index), and the negative LST/VI relationship is often used to estimate LST. However, this issue hasn't reached academic agreement yet as the LST/VI relation isn't linear, static and independent of other factors. This study examined the temporal variation of LST/VI relation and its link with soil moisture with multi-phase MODIS products. The result indicates that in the regions of high latitude where the condition of thermal energy is among ecologic limiting factors, the negative LST/VI relation doesn't hold true. The study also proves that the LST/VI association depends on soil moisture, which further complicates their relationship. This examination underlines that when the LST/VI slope is used to estimate LST, the uncertainty of LST/VI relation and the influence of soil moisture should both be carefully take into accounts.
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Wenjiang Zhang, Zhiqiang Gao, "Analyzing the relationship between land surface temperature and vegetation cover: a case of typical grassland in North China", Proc. SPIE 6679, Remote Sensing and Modeling of Ecosystems for Sustainability IV, 66790T (9 October 2007); doi: 10.1117/12.730665; https://doi.org/10.1117/12.730665
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