干旱区生态环境知识资源中心(Arid): Contrasting responses of relationship between solar-induced fluorescence and gross primary production to drought across aridity gradients

Arid

DOI	10.1016/j.rse.2023.113984
	Contrasting responses of relationship between solar-induced fluorescence and gross primary production to drought across aridity gradients
	Qiu, Ruonan; Han, Ge; Li, Xing; Xiao, Jingfeng; Liu, Jiangong; Wang, Songhan; Li, Siwei; Gong, Wei
通讯作者	Han, G
来源期刊	REMOTE SENSING OF ENVIRONMENT
ISSN	0034-4257
EISSN	1879-0704
出版年	2024
卷号	302
英文摘要	Satellite solar-induced chlorophyll fluorescence (SIF) can provide valuable insights on terrestrial gross primary production (GPP) and its response to climate from region to global scales. However, the relationship between SIF and GPP under different climate conditions (such as drought) is not yet fully understood and remains a topic of debate in the literature. Here we examined the responses of the SIF-GPP relationship (i.e., the slope k of the linear SIF-GPP relationship, GPP = k x SIF) to drought along the aridity gradient using seven satellite SIF datasets, three GPP products, and 62 flux towers. The results revealed divergent SIF-GPP relationships under different aridity and drought conditions based on different SIF and GPP datasets. Overall, we found that with increasing aridity index (AI) (more humid), k derived from SIF with afternoon overpass (dailySIFPM) decreased, while k from SIF with morning overpass (dailySIFAM) increased. When there is a drought, for arid and semi -arid regions with AI from 0 to 0.4, kPM (the slope of dailySIFPM-GPP) increased, but kAM (the slope of dailySIFAM-GPP) decreased. The dailySIFPM also showed larger decreases than dailySIFAM and GPP during the drought. The contrasting responses among two groups of SIF may result from different SIF overpass time which detected different levels of water stresses on photosynthesis. The dryland ecosystems may exhibit strong midday and afternoon depression in photosynthesis under stress, which led to underestimation of daily SIF that was converted from midday/afternoon-observed SIF by assuming ideal symmetrical diurnal cycle of solar radiation. Our study highlights that in addition to multiple previously reported factors, different observation time of SIF may also affect the SIF-GPP relationship.
英文关键词	Dryland Sun-induced chlorophyll fluorescence Overpass time Gross primary productivity Drought Diurnal cycle Midday depression
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001155301000001
WOS关键词	INDUCED CHLOROPHYLL FLUORESCENCE ; SUN-INDUCED FLUORESCENCE ; CARBON-DIOXIDE ; PHOTOSYNTHESIS ; RETRIEVAL ; RESOLUTION ; CANOPY ; FOREST ; SIF
WOS类目	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405325
推荐引用方式 GB/T 7714	Qiu, Ruonan,Han, Ge,Li, Xing,et al. Contrasting responses of relationship between solar-induced fluorescence and gross primary production to drought across aridity gradients[J],2024,302.
APA	Qiu, Ruonan.,Han, Ge.,Li, Xing.,Xiao, Jingfeng.,Liu, Jiangong.,...&Gong, Wei.(2024).Contrasting responses of relationship between solar-induced fluorescence and gross primary production to drought across aridity gradients.REMOTE SENSING OF ENVIRONMENT,302.
MLA	Qiu, Ruonan,et al."Contrasting responses of relationship between solar-induced fluorescence and gross primary production to drought across aridity gradients".REMOTE SENSING OF ENVIRONMENT 302(2024).