气候变化领域集成服务门户(CCPortal): Increasing temperature regulates the advance of peak photosynthesis timing in the boreal ecosystem

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DOI	10.1016/j.scitotenv.2023.163587
	Increasing temperature regulates the advance of peak photosynthesis timing in the boreal ecosystem
	Li, Guo; Wu, Chaoyang; Chen, Yanan; Huang, Changping; Zhao, Yan; Wang, Yanan; Ma, Mingguo; Ding, Zhi; Yu, Pujia; Tang, Xuguang
发表日期	2023
ISSN	0048-9697
EISSN	1879-1026
卷号	882
英文摘要	The shift in vegetation phenology is an essential indicator of global climate change. Numerous researches based on reflectance-based vegetation index data have explored the changes in the start (SOS) and end (EOS) of vegetation life events at long time scales, while a huge discrepancy existed between the phenological metrics of vegetation struc-ture and function. The peak photosynthesis timing (PPT), which is crucial in regulating terrestrial ecosystem carbon balance, has not received much attention. Using two global reconstructed solar-induced chlorophyll fluorescence data (CSIF and GOSIF) directly associated with vegetation photosynthesis, the spatio-temporal dynamics in PPT as well as the key environmental controls across the boreal ecosystem during 2001-2019 were systematically explored. Multi-year mean pattern showed that PPT mainly appeared in the first half of July. Compared to the northern Eurasia, later PPT appeared in the northern North America continent for about 4-5 days. Meanwhile, spatial trend in PPT ex-hibited an advanced trend during the last two decades. Especially, shrubland and grassland were obvious among all biomes. Spatial partial correlation analysis revealed that preseason temperature was the dominant environmental driver of PPT trends, occupying 81.32% and 78.04% of the total pixels of PPTCSIF and PPTGOSIF, respectively. Attribu-tion analysis by ridge regression again emphasized the largest contribution of temperature to PPT dynamics in the bo -real ecosystem by 52.22% (PPTCSIF) and 46.59% (PPTGOSIF), followed by radiation (PPTCSIF: 24.44%; PPTGOSIF: 28.66%) and precipitation (PPTCSIF: 23.34%; PPTGOSIF: 24.75%). These results have significant implications for deep-ening our understanding between vegetation photosynthetic phenology and carbon cycling with respect to future cli-mate change in the boreal ecosystem.
英文关键词	Plant phenology; Peak photosynthesis timing (PPT); CSIF; GOSIF; Climate change; Remote sensing
语种	英语
WOS研究方向	Environmental Sciences
WOS类目	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000989025000001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/281202
作者单位	Southwest University - China; Southwest University - China; Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Chinese Academy of Sciences
推荐引用方式 GB/T 7714	Li, Guo,Wu, Chaoyang,Chen, Yanan,et al. Increasing temperature regulates the advance of peak photosynthesis timing in the boreal ecosystem[J],2023,882.
APA	Li, Guo.,Wu, Chaoyang.,Chen, Yanan.,Huang, Changping.,Zhao, Yan.,...&Tang, Xuguang.(2023).Increasing temperature regulates the advance of peak photosynthesis timing in the boreal ecosystem.SCIENCE OF THE TOTAL ENVIRONMENT,882.
MLA	Li, Guo,et al."Increasing temperature regulates the advance of peak photosynthesis timing in the boreal ecosystem".SCIENCE OF THE TOTAL ENVIRONMENT 882(2023).