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Remote sensing of sunlight-induced chlorophyll fluorescence and reflectance of Scots pine in the boreal forest during spring recovery

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Remote sensing of sunlight-induced chlorophyll fluorescence and reflectance of Scots pine in the boreal forest during spring recovery

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dc.contributor.author	Louis, J.
dc.contributor.author	Ounis, Abderrahmane
dc.contributor.author	Ducruet, Jean-Marc
dc.contributor.author	Evain, Sébastien
dc.contributor.author	Laurila, Tuomas
dc.contributor.author	Thum, Tea
dc.contributor.author	Aurela, Mika
dc.contributor.author	Wingsle, Gunnar
dc.contributor.author	Alonso Chordá, Luis
dc.contributor.author	Pedrós Esteban, Roberto
dc.contributor.author	Moya, Ismael
dc.date.accessioned	2017-10-24T15:12:33Z
dc.date.available	2017-10-24T15:12:33Z
dc.date.issued	2005
dc.identifier.citation	Louis, J. Ounis, Abderrahmane Ducruet, Jean-Marc Evain, Sébastien Laurila, Tuomas Thum, Tea Aurela, Mika Wingsle, Gunnar Alonso Chordá, Luis Pedrós Esteban, Roberto Moya, Ismael 2005 Remote sensing of sunlight-induced chlorophyll fluorescence and reflectance of Scots pine in the boreal forest during spring recovery Remote Sensing of Environment 96 1 37 48
dc.identifier.uri	http://hdl.handle.net/10550/62893
dc.description.abstract	A measurement campaign to assess the feasibility of remote sensing of sunlight-induced chlorophyll fluorescence (ChlF) from a coniferous canopy was conducted in a boreal forest study site (Finland). A Passive Multi-wavelength Fluorescence Detector (PMFD) sensor, developed in the LURE laboratory, was used to obtain simultaneous measurements of ChlF in the oxygen absorption bands, at 687 and 760 nm, and a reflectance index, the PRI (Physiological Reflectance Index), for a month during spring recovery. When these data were compared with active fluorescence measurements performed on needles they revealed the same trend. During sunny days fluorescence and reflectance signals were found to be strongly influenced by shadows associated with the canopy structure. Moreover, chlorophyll fluorescence variations induced by rapid light changes (due to transient cloud shadows) were found to respond more quickly and with larger amplitude under summer conditions compared to those obtained under cold acclimation conditions. In addition, ChlF at 760 nm was observed to increase with the chlorophyll content. During this campaign, the CO2 assimilation was measured at the forest canopy level and was found remarkably well correlated with the PRI index.
dc.language.iso	eng
dc.relation.ispartof	Remote Sensing of Environment, 2005, vol. 96, num. 1, p. 37-48
dc.subject	Fluorescència
dc.subject	Teledetecció
dc.title	Remote sensing of sunlight-induced chlorophyll fluorescence and reflectance of Scots pine in the boreal forest during spring recovery
dc.type	journal article	es_ES
dc.date.updated	2017-10-24T15:12:33Z
dc.identifier.doi	10.1016/j.rse.2005.01.013
dc.identifier.idgrec	019053
dc.rights.accessRights	open access	es_ES