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Remote Sensing Technology and Application  2022, Vol. 37 Issue (3): 702-712    DOI: 10.11873/j.issn.1004-0323.2022.3.0702
Spatiotemporal Variations of Satellite-based SIF and Its Climate Response in China from 2007 to 2018
Zhirong Yan1,2(),Liangyun Liu2(),Xia Jing1
1.School of Surveying and Mapping Science and Technology,Xi'an University of Science and Technology,Xi'an 710054,China
2.Institute of Aerospace Information Innovation,Chinese Academy of Sciences,Beijing 100101,China
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Based on the GOME-2 satellite SIF dataset, we analyzed the spatial and temporal changes of SIF from 2007 to 2018 in China, and investigated the response of SIF to climate changes, such as temperature, precipitation, and radiation. The results showed that: (1) The SIF in China's vegetation region generally shows a decreasing distribution from southeast to northwest. The average annual SIF increases by 20.2% in last 12 years, with an amplitude of 0.034 mW/m2/sr/nm, and the increase area accounts for 80.3% of the whole China. The area with significant growth of SIF accounts for 25.7%, which were mainly distributed in eastern, southern and northeastern China. (2) The SIF increase in summer season during last twelve years is the largest with an amplitude of 0.065 mW/m2/sr/nm; the area with increased summer SIF accounts for 82.1% of the whole China, and the area with significant increase accounts for 19.4%. (3) The response of SIF to climate change was investigated using the partial correlation method. temperature is the main factor affecting the interannual variation of SIF; precipitation is the main driven factor for SIF in warm temperate and temperate vegetation regions; human activities are more likely to affect the growth of SIF in the green broad-leaved forest area; radiation is the driven factor for tropical monsoon rain forest areas located in low latitudes. The above results reveal the temporal and spatial changes of vegetation fluorescence in China from 2007 to 2018 and its response to climate change, which can provide important support for global carbon cycle research.

Key words:  Sunlight-induced chlorophyll fluorescence      GOME-2 satellite      Trend analysis      Climate response     
Received:  22 January 2021      Published:  25 August 2022
ZTFLH:  Q948.1  
Corresponding Authors:  Liangyun Liu     E-mail:;
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Zhirong Yan
Liangyun Liu
Xia Jing

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Zhirong Yan,Liangyun Liu,Xia Jing. Spatiotemporal Variations of Satellite-based SIF and Its Climate Response in China from 2007 to 2018. Remote Sensing Technology and Application, 2022, 37(3): 702-712.

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Fig.1  China's climate zone map
Fig.2  Average annual and seasonal mean SIF of vegetation regions in China from 2007 to 2018
Fig. 3  Annual average and seasonal ?SIF of vegetation region in China from 2007 to 2018
Fig.4  Significant annual and seasonal variations of SIF in China's vegetation regions from 2007 to 2018
Fig.5  Changes in temperature, precipitation, radiation, and SIF in the eight regions
Fig.6  Box plot of partial correlation coefficients of temperature, precipitation, radiation and SIF in growing seasons in different regions of China from 2007 to 2018
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