Detecting drought-induced GPP spatiotemporal variabilities with sun-induced chlorophyll fluorescence during the 2009/2010 droughts in China

In the parallel with the climate change, droughts have become one of the major climate extremes that induce losses in the terrestrial gross primary production (GPP). However, studying of the drought effects on GPP is still challenging, partly due to the lack of direct observations of GPP at large sc...

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Autores principales:	Shiliu Chen, Yuefei Huang, Guangqian Wang
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Drought monitoring Solar-induced chlorophyll fluorescence (SIF) Gross primary production (GPP) Vegetation China Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/3cc87c3deec34965a4c70ed86598a3fc
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id	oai:doaj.org-article:3cc87c3deec34965a4c70ed86598a3fc
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spelling	oai:doaj.org-article:3cc87c3deec34965a4c70ed86598a3fc2021-12-01T04:34:46ZDetecting drought-induced GPP spatiotemporal variabilities with sun-induced chlorophyll fluorescence during the 2009/2010 droughts in China1470-160X10.1016/j.ecolind.2020.107092https://doaj.org/article/3cc87c3deec34965a4c70ed86598a3fc2021-02-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20310311https://doaj.org/toc/1470-160XIn the parallel with the climate change, droughts have become one of the major climate extremes that induce losses in the terrestrial gross primary production (GPP). However, studying of the drought effects on GPP is still challenging, partly due to the lack of direct observations of GPP at large scales. Aiming to explore the potential of spaceborne sun-induced chlorophyll fluorescence (SIF) in monitoring vegetation droughts and quantifying the drought-induced GPP variabilities, we evaluated GOME-2 SIF with two state-of-art GPP products (i.e. FLUXCOM GPP and GLASS GPP) and flux tower observed GPP, using 2009 summer drought in Northeast China and 2010 spring drought in Southwest China as study cases. We found that SIF was a quantifying indicator of GPP and successfully characterized the temporal dynamics and spatial extents of GPP anomalies during the drought events, as well as accurately estimating the drought-induced GPP losses. Moreover, SIF (R2 = 0.87) performed better than enhanced vegetation index (R2 = 0.78) in capturing the photosynthesis changes induced by droughts, suggesting SIF was more sensitive to plant physiological changes. The strong positive correlations of SIF with Palmer drought severity index (PDSI) and root-zone soil moisture, further gave confidences on the capacity of SIF in vegetation drought monitoring. SIF had a time lag response to both PDSI and soil moisture, which might be attributable to the plants adaptation mechanisms for the drought occurrence and physiological recovery after water stress. Our study demonstrates that satellite-based SIF can achieve real-time vegetation drought monitoring and the assessment of drought-induced GPP anomalies at large scales, thus providing a unique opportunity to study the impacts of drought on vegetation carbon uptake.Shiliu ChenYuefei HuangGuangqian WangElsevierarticleDrought monitoringSolar-induced chlorophyll fluorescence (SIF)Gross primary production (GPP)VegetationChinaEcologyQH540-549.5ENEcological Indicators, Vol 121, Iss , Pp 107092- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Drought monitoring Solar-induced chlorophyll fluorescence (SIF) Gross primary production (GPP) Vegetation China Ecology QH540-549.5
spellingShingle	Drought monitoring Solar-induced chlorophyll fluorescence (SIF) Gross primary production (GPP) Vegetation China Ecology QH540-549.5 Shiliu Chen Yuefei Huang Guangqian Wang Detecting drought-induced GPP spatiotemporal variabilities with sun-induced chlorophyll fluorescence during the 2009/2010 droughts in China
description	In the parallel with the climate change, droughts have become one of the major climate extremes that induce losses in the terrestrial gross primary production (GPP). However, studying of the drought effects on GPP is still challenging, partly due to the lack of direct observations of GPP at large scales. Aiming to explore the potential of spaceborne sun-induced chlorophyll fluorescence (SIF) in monitoring vegetation droughts and quantifying the drought-induced GPP variabilities, we evaluated GOME-2 SIF with two state-of-art GPP products (i.e. FLUXCOM GPP and GLASS GPP) and flux tower observed GPP, using 2009 summer drought in Northeast China and 2010 spring drought in Southwest China as study cases. We found that SIF was a quantifying indicator of GPP and successfully characterized the temporal dynamics and spatial extents of GPP anomalies during the drought events, as well as accurately estimating the drought-induced GPP losses. Moreover, SIF (R2 = 0.87) performed better than enhanced vegetation index (R2 = 0.78) in capturing the photosynthesis changes induced by droughts, suggesting SIF was more sensitive to plant physiological changes. The strong positive correlations of SIF with Palmer drought severity index (PDSI) and root-zone soil moisture, further gave confidences on the capacity of SIF in vegetation drought monitoring. SIF had a time lag response to both PDSI and soil moisture, which might be attributable to the plants adaptation mechanisms for the drought occurrence and physiological recovery after water stress. Our study demonstrates that satellite-based SIF can achieve real-time vegetation drought monitoring and the assessment of drought-induced GPP anomalies at large scales, thus providing a unique opportunity to study the impacts of drought on vegetation carbon uptake.
format	article
author	Shiliu Chen Yuefei Huang Guangqian Wang
author_facet	Shiliu Chen Yuefei Huang Guangqian Wang
author_sort	Shiliu Chen
title	Detecting drought-induced GPP spatiotemporal variabilities with sun-induced chlorophyll fluorescence during the 2009/2010 droughts in China
title_short	Detecting drought-induced GPP spatiotemporal variabilities with sun-induced chlorophyll fluorescence during the 2009/2010 droughts in China
title_full	Detecting drought-induced GPP spatiotemporal variabilities with sun-induced chlorophyll fluorescence during the 2009/2010 droughts in China
title_fullStr	Detecting drought-induced GPP spatiotemporal variabilities with sun-induced chlorophyll fluorescence during the 2009/2010 droughts in China
title_full_unstemmed	Detecting drought-induced GPP spatiotemporal variabilities with sun-induced chlorophyll fluorescence during the 2009/2010 droughts in China
title_sort	detecting drought-induced gpp spatiotemporal variabilities with sun-induced chlorophyll fluorescence during the 2009/2010 droughts in china
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/3cc87c3deec34965a4c70ed86598a3fc
work_keys_str_mv	AT shiliuchen detectingdroughtinducedgppspatiotemporalvariabilitieswithsuninducedchlorophyllfluorescenceduringthe20092010droughtsinchina AT yuefeihuang detectingdroughtinducedgppspatiotemporalvariabilitieswithsuninducedchlorophyllfluorescenceduringthe20092010droughtsinchina AT guangqianwang detectingdroughtinducedgppspatiotemporalvariabilitieswithsuninducedchlorophyllfluorescenceduringthe20092010droughtsinchina
_version_	1718405836021170176

Detecting drought-induced GPP spatiotemporal variabilities with sun-induced chlorophyll fluorescence during the 2009/2010 droughts in China

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