Combining Sun-Induced Chlorophyll Fluorescence and Photochemical Reflectance Index Improves Diurnal Modeling of Gross Primary Productivity
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| Title: | Main Title: Combining Sun-Induced Chlorophyll Fluorescence and Photochemical Reflectance Index Improves Diurnal Modeling of Gross Primary Productivity |
| Description: | 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. |
| Identifier: | 10.3390/rs8070574 (DOI) |
Responsible Party
| Creators: | Anke Schickling (Author), Maria Matveeva (Author), Alexander Damm (Author), Jan Schween (Author), Andreas Wahner (Author), Alexander Graf (Author), Susanne Crewell (Author), Uwe Rascher (Author) |
| Publisher: | MDPI |
| Publication Year: | 2017 |
Topic
| TR32 Topic: | Vegetation |
| Related Subproject: | D2 |
| Subjects: | Keywords: Spectroscopy, Chlorophyll Fluorescence, GPP, Vegetation, Photosynthesis |
File Details
| Filename: | Schickling_et_al_2016.pdf |
| Data Type: | Text - Article |
| Size: | 18 Pages |
| File Size: | 3.9 MB |
| Dates: | Accepted: 30.06.2016 Available: 08.07.2016 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Free |
| General Access and Use Conditions: | According to the TR32DB data policy agreement. |
| Access Limitations: | According to the TR32DB data policy agreement. |
| Licence: | [TR32DB] Data policy agreement |
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Specific Information - Publication
| Publication Status: | Published |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | Remote Sensing |
| Issue: | 8 |
| Volume: | 574 |
| Number of Pages: | 18 (1 - 18) |
Metadata Details
| Metadata Creator: | Tanja Kramm |
| Metadata Created: | 26.05.2017 |
| Metadata Last Updated: | 26.05.2017 |
| Subproject: | D2 |
| Funding Phase: | 3 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Metadata Downloads: | 0 |
| Dataset Downloads: | 1 |
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