Schickling, Anke ORCID: 0000-0001-7446-7752, Matveeva, Maria, Damm, Alexander, Schween, Jan H., Wahner, Andreas ORCID: 0000-0001-8948-1928, Graf, Alexander ORCID: 0000-0003-4870-7622, Crewell, Susanne ORCID: 0000-0003-1251-5805 and Rascher, Uwe ORCID: 0000-0002-9993-4588 (2016). Combining Sun-Induced Chlorophyll Fluorescence and Photochemical Reflectance Index Improves Diurnal Modeling of Gross Primary Productivity. Remote Sens., 8 (7). BASEL: MDPI AG. ISSN 2072-4292

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Abstract

Sun-induced chlorophyll fluorescence (F) is a novel remote sensing parameter providing an estimate of actual photosynthetic rates. A combination of this new observable and Monteith's light use efficiency (LUE) concept was suggested for an advanced modeling of gross primary productivity (GPP). In this demonstration study, we evaluate the potential of both F and the more commonly used photochemical reflectance index (PRI) to approximate the LUE term in Monteith's equation and eventually improve the forward modeling of GPP diurnals. Both F and the PRI were derived from ground and airborne based spectrometer measurements over two different crops. We demonstrate that approximating dynamic changes of LUE using F and PRI significantly improves the forward modeling of GPP diurnals. Especially in sugar beet, a changing photosynthetic efficiency during the day was traceable with F and incorporating F in the forward modeling significantly improved the estimation of GPP. Airborne data were projected to produce F and PRI maps for winter wheat and sugar beet fields over the course of one day. We detected a significant variability of both, F and the PRI within one field and particularly between fields. The variability of F and PRI was higher in sugar beet, which also showed a physiological down-regulation of leaf photosynthesis. Our results underline the potential of F to serve as a superior indicator for the actual efficiency of the photosynthetic machinery, which is linked to physiological responses of vegetation.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Schickling, AnkeUNSPECIFIEDorcid.org/0000-0001-7446-7752UNSPECIFIED
Matveeva, MariaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Damm, AlexanderUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schween, Jan H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wahner, AndreasUNSPECIFIEDorcid.org/0000-0001-8948-1928UNSPECIFIED
Graf, AlexanderUNSPECIFIEDorcid.org/0000-0003-4870-7622UNSPECIFIED
Crewell, SusanneUNSPECIFIEDorcid.org/0000-0003-1251-5805UNSPECIFIED
Rascher, UweUNSPECIFIEDorcid.org/0000-0002-9993-4588UNSPECIFIED
URN: urn:nbn:de:hbz:38-271759
DOI: 10.3390/rs8070574
Journal or Publication Title: Remote Sens.
Volume: 8
Number: 7
Date: 2016
Publisher: MDPI AG
Place of Publication: BASEL
ISSN: 2072-4292
Language: English
Faculty: Faculty of Mathematics and Natural Sciences
Divisions: Faculty of Mathematics and Natural Sciences > Department of Geosciences > Institute of Geology and Mineralog
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
PHOTOSYNTHETIC EFFICIENCY; SENSITIVITY-ANALYSIS; SPECTROSCOPY DATA; CARBON-DIOXIDE; CANOPY; VEGETATION; SPACE; RETRIEVAL; RADIATION; LIGHTMultiple languages
Remote SensingMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/27175

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