气候变化领域集成服务门户(CCPortal): Spatial-temporal heterogeneity of spring phenology in boreal forests as estimated by satellite solar-induced chlorophyll fluorescence and vegetation index

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DOI	10.1016/j.agrformet.2024.109888
	Spatial-temporal heterogeneity of spring phenology in boreal forests as estimated by satellite solar-induced chlorophyll fluorescence and vegetation index
	Shi, Dandan; Jiang, Yuan; Li, Wenqing; Wen, Yan; Wu, Fang; Zhao, Shoudong
发表日期	2024
ISSN	0168-1923
EISSN	1873-2240
起始页码	346
卷号	346
英文摘要	Changes in spring phenology in boreal forests around the subarctic region have a profound impact on the global carbon and water cycles. To date, photosynthesis and greenness dynamics in evergreen coniferous forests have been found to be decoupled on a large scale, but whether the spatial heterogeneity of seasonal dynamics in boreal forests is coupled in various datasets remains unclear. Therefore, based on the solar-induced chlorophyll fluorescence (SIF) retrieved by satellite and the modelled SIF (GOME-2 SIF and GOSIF) during 2007-2018, we calculated the start of the growing season (SOS) of boreal forests (45-70N) and compared the results with 2band Enhanced Vegetation Index (EVI2) phenological products (MCD12Q2 C6) and flux data (Gross primary productivity, GPP) phenology. The spatial-temporal variations in the SOS were analyzed by linear regression and piecewise linear regression. The results exhibited that GOME-2 SIF showed an SOS of 11 days earlier than GOSIF, 8 days earlier than EVI2 in North America, and 5 days earlier than GOSIF, 3 days earlier than EVI2 in Eurasia. However, all relationships between SOSs of the three remote sensing datasets were significant in North America and Eurasia, and the significance was higher in Eurasia. With increasing latitude and longitude, almost all SOSs estimated from the three datasets significantly increased. Also, both in North America and Eurasia, the SOSs exhibited a trend of being advanced to being delayed from the western to the eastern parts of the continents over 2007-2018. This indicated the spatial consistency of photosynthesis and greenness dynamics in the spring phenology of boreal forests, especially in Eurasia. In this study, the validity of the spatial-temporal variation in spring phenology of boreal forests based on GOME-2 SIF retrieved from satellites and MCD12Q2 C6 was confirmed, and further exploration is needed to determine their potential advantages.
英文关键词	Solar-induced chlorophyll fluorescence; Vegetation index; Spring phenology; Spatial-temporal heterogeneity; Boreal forests
语种	英语
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001167459800001
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304403
作者单位	Beijing Normal University; Beijing Normal University; Ministry of Natural Resources of the People's Republic of China; Northwest A&F University - China; Beijing Normal University; China Meteorological Administration; Chinese Academy of Meteorological Sciences (CAMS)
推荐引用方式 GB/T 7714	Shi, Dandan,Jiang, Yuan,Li, Wenqing,et al. Spatial-temporal heterogeneity of spring phenology in boreal forests as estimated by satellite solar-induced chlorophyll fluorescence and vegetation index[J],2024,346.
APA	Shi, Dandan,Jiang, Yuan,Li, Wenqing,Wen, Yan,Wu, Fang,&Zhao, Shoudong.(2024).Spatial-temporal heterogeneity of spring phenology in boreal forests as estimated by satellite solar-induced chlorophyll fluorescence and vegetation index.AGRICULTURAL AND FOREST METEOROLOGY,346.
MLA	Shi, Dandan,et al."Spatial-temporal heterogeneity of spring phenology in boreal forests as estimated by satellite solar-induced chlorophyll fluorescence and vegetation index".AGRICULTURAL AND FOREST METEOROLOGY 346(2024).