First Investigation of the Relationship Between Solar-Induced Chlorophyll Fluorescence Observed by TanSat and Gross Primary Productivity

Reliable estimation of gross primary production (GPP) of terrestrial ecosystems is crucial in the global carbon cycle and ecosystem functioning studies. Solar-induced chlorophyll fluorescence (SIF) has emerged as an unprecedented proxy for terrestrial GPP estimation. TanSat SIF with a 2-km fine spat...

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Autores principales:	Shanshan Du, Liangyun Liu, Xinjie Liu, Jidai Chen
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Gross primary productivity moderate resolution imaging spectroradiometer (MODIS) solar-induced chlorophyll fluorescence (SIF) tanSat Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809
Acceso en línea:	https://doaj.org/article/19e4bf69c9874c4db06187e26ec75862
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spelling	oai:doaj.org-article:19e4bf69c9874c4db06187e26ec758622021-12-03T00:00:16ZFirst Investigation of the Relationship Between Solar-Induced Chlorophyll Fluorescence Observed by TanSat and Gross Primary Productivity2151-153510.1109/JSTARS.2021.3128355https://doaj.org/article/19e4bf69c9874c4db06187e26ec758622021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9616394/https://doaj.org/toc/2151-1535Reliable estimation of gross primary production (GPP) of terrestrial ecosystems is crucial in the global carbon cycle and ecosystem functioning studies. Solar-induced chlorophyll fluorescence (SIF) has emerged as an unprecedented proxy for terrestrial GPP estimation. TanSat SIF with a 2-km fine spatial resolution provides an excellent opportunity to investigate the relationships of satellite SIF and eddy covariance (EC) GPP at ecosystem or site scale, while has not been investigated. In this article, we investigated the relationship between TanSat SIF and EC GPP based on flux tower sites encompassing different biomes over the globe. TanSat SIF exhibited strong relationships with EC GPP at Fe and KI bands for instantaneous and daily timescales. The correlations between EC GPP and TanSat SIF (<italic>R</italic><sup>2</sup> = 0.61) were much better than moderate resolution imaging spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF)-corrected vegetation indices (VIs) (<italic>R</italic><sup>2</sup> = 0.48–0.58). Further comparisons between SIF and GPP with absorbed photosynthetically active radiation (APAR) and two environmental factors (fTmin and fVPD) showed that SIF responded to APAR and was similarly affected by environmental factors as GPP. GPP derived from SIF (<italic>R</italic><sup>2</sup> = 0.64) also performed slightly better than enhanced vegetation index and near-infrared reflectance of vegetation and even light use efficiency MODIS GPP algorithm (<italic>R</italic><sup>2</sup> = 0.58–0.60). Therefore, our results demonstrated the feasibility of SIF on estimating GPP at sites or ecosystem levels; in addition, incorporating TanSat SIF with other satellite SIF products will open a new era for carbon cycling and ecosystem functioning studies.Shanshan DuLiangyun LiuXinjie LiuJidai ChenIEEEarticleGross primary productivitymoderate resolution imaging spectroradiometer (MODIS)solar-induced chlorophyll fluorescence (SIF)tanSatOcean engineeringTC1501-1800Geophysics. Cosmic physicsQC801-809ENIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 14, Pp 11892-11902 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Gross primary productivity moderate resolution imaging spectroradiometer (MODIS) solar-induced chlorophyll fluorescence (SIF) tanSat Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809
spellingShingle	Gross primary productivity moderate resolution imaging spectroradiometer (MODIS) solar-induced chlorophyll fluorescence (SIF) tanSat Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 Shanshan Du Liangyun Liu Xinjie Liu Jidai Chen First Investigation of the Relationship Between Solar-Induced Chlorophyll Fluorescence Observed by TanSat and Gross Primary Productivity
description	Reliable estimation of gross primary production (GPP) of terrestrial ecosystems is crucial in the global carbon cycle and ecosystem functioning studies. Solar-induced chlorophyll fluorescence (SIF) has emerged as an unprecedented proxy for terrestrial GPP estimation. TanSat SIF with a 2-km fine spatial resolution provides an excellent opportunity to investigate the relationships of satellite SIF and eddy covariance (EC) GPP at ecosystem or site scale, while has not been investigated. In this article, we investigated the relationship between TanSat SIF and EC GPP based on flux tower sites encompassing different biomes over the globe. TanSat SIF exhibited strong relationships with EC GPP at Fe and KI bands for instantaneous and daily timescales. The correlations between EC GPP and TanSat SIF (<italic>R</italic><sup>2</sup> = 0.61) were much better than moderate resolution imaging spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF)-corrected vegetation indices (VIs) (<italic>R</italic><sup>2</sup> = 0.48–0.58). Further comparisons between SIF and GPP with absorbed photosynthetically active radiation (APAR) and two environmental factors (fTmin and fVPD) showed that SIF responded to APAR and was similarly affected by environmental factors as GPP. GPP derived from SIF (<italic>R</italic><sup>2</sup> = 0.64) also performed slightly better than enhanced vegetation index and near-infrared reflectance of vegetation and even light use efficiency MODIS GPP algorithm (<italic>R</italic><sup>2</sup> = 0.58–0.60). Therefore, our results demonstrated the feasibility of SIF on estimating GPP at sites or ecosystem levels; in addition, incorporating TanSat SIF with other satellite SIF products will open a new era for carbon cycling and ecosystem functioning studies.
format	article
author	Shanshan Du Liangyun Liu Xinjie Liu Jidai Chen
author_facet	Shanshan Du Liangyun Liu Xinjie Liu Jidai Chen
author_sort	Shanshan Du
title	First Investigation of the Relationship Between Solar-Induced Chlorophyll Fluorescence Observed by TanSat and Gross Primary Productivity
title_short	First Investigation of the Relationship Between Solar-Induced Chlorophyll Fluorescence Observed by TanSat and Gross Primary Productivity
title_full	First Investigation of the Relationship Between Solar-Induced Chlorophyll Fluorescence Observed by TanSat and Gross Primary Productivity
title_fullStr	First Investigation of the Relationship Between Solar-Induced Chlorophyll Fluorescence Observed by TanSat and Gross Primary Productivity
title_full_unstemmed	First Investigation of the Relationship Between Solar-Induced Chlorophyll Fluorescence Observed by TanSat and Gross Primary Productivity
title_sort	first investigation of the relationship between solar-induced chlorophyll fluorescence observed by tansat and gross primary productivity
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/19e4bf69c9874c4db06187e26ec75862
work_keys_str_mv	AT shanshandu firstinvestigationoftherelationshipbetweensolarinducedchlorophyllfluorescenceobservedbytansatandgrossprimaryproductivity AT liangyunliu firstinvestigationoftherelationshipbetweensolarinducedchlorophyllfluorescenceobservedbytansatandgrossprimaryproductivity AT xinjieliu firstinvestigationoftherelationshipbetweensolarinducedchlorophyllfluorescenceobservedbytansatandgrossprimaryproductivity AT jidaichen firstinvestigationoftherelationshipbetweensolarinducedchlorophyllfluorescenceobservedbytansatandgrossprimaryproductivity
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First Investigation of the Relationship Between Solar-Induced Chlorophyll Fluorescence Observed by TanSat and Gross Primary Productivity

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