Impact of thermal condition on vegetation feedback under greening trend of China

In China, an unambiguous greening trend was observed over the last three decades. The feedback induced by vegetation growth can affect regional climate. Here, we investigated how vegetation feeds back to land surface temperature (LST) in temperature zones and land-use types in China using 18-years (...

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Bibliographic Details
Published in:The Science of the total environment 2021-09, Vol.785, p.147380-147380, Article 147380
Main Authors: Xue, Yuxuan, Lu, Hongwei, Guan, Yanlong, Tian, Peipei, Yao, Tianci
Format: Article
Language:English
Subjects:
China
Land surface temperature
MODIS
Temperature zones
Vegetation feedback
Vegetation growth
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Summary:In China, an unambiguous greening trend was observed over the last three decades. The feedback induced by vegetation growth can affect regional climate. Here, we investigated how vegetation feeds back to land surface temperature (LST) in temperature zones and land-use types in China using 18-years (2001–2018) of Moderate Resolution Imaging Spectroradiometer (MODIS) LST and Normalized Difference Vegetation Index (NDVI) data. We first showed that vegetation feedback was significantly negative (p < 0.1, t-test) in most parts of China. Specifically, we discovered a downtrend of vegetation feedback from the coldest temperature zone to the hottest temperature zone. Moreover, vegetation feedback and thermal condition showed an inverse relationship among temperature zones. The inverse relationship clarified that vegetation growth can cool most parts of China during climate change. In the end, we showed the pattern of vegetation feedback among land-use types. Due to the expansion of grassland, vegetation feedback may temporarily positive. Suitable vegetation coverage in urban land, banning deforestation, and cultivating land reasonably can decrease the local temperature by inducing negative vegetation feedback. [Display omitted] •Vegetation feedback to land surface temperature is negative in most parts of China.•A strong impact of thermal condition on vegetation feedback has been found.•Vegetation growth can cool most parts of the earth during global warming.•Expansion of grassland may temporarily warm a cold region.•Vegetation growth in urban land, woodland, and arable land decrease temperature.
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2021.147380