Sun-induced fluorescence – a new probe of photosynthesis: First maps from the imaging spectrometer HyPlant
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| Title: | Main Title: Sun-induced fluorescence – a new probe of photosynthesis: First maps from the imaging spectrometer HyPlant |
| Description: | Abstract: Variations in photosynthesis still cause substantial uncertainties in predicting photosynthetic CO2 uptake rates and monitoring plant stress. Changes in actual photosynthesis that are not related to greenness of vegetation are difficult to measure by reflectance based optical remote sensing techniques. Several activities are underway to evaluate the sun-induced fluorescence signal on the ground and on a coarse spatial scale using space-borne imaging spectrometers. Intermediate-scale observations using airborne-based imaging spectroscopy, which are critical to bridge the existing gap between small-scale field studies and global observations, are still insufficient. Here we present the first validated maps of sun-induced fluorescence in that critical, intermediate spatial resolution, employing the novel airborne imaging spectrometer HyPlant. HyPlant has an unprecedented spectral resolution, which allows for the first time quantifying sun-induced fluorescence fluxes in physical units according to the Fraunhofer Line Depth Principle that exploits solar and atmospheric absorption bands. Maps of sun-induced fluorescence show a large spatial variability between different vegetation types, which complement classical remote sensing approaches. Different crop types largely differ in emitting fluorescence that additionally changes within the seasonal cycle and thus may be related to the seasonal activation and deactivation of the photosynthetic machinery. We argue that sun-induced fluorescence emission is related to two processes: (i) the total absorbed radiation by photosynthetically active chlorophyll; and (ii) the functional status of actual photosynthesis and vegetation stress. |
| Identifier: | 10.1111/gcb.13017 (DOI) |
Responsible Party
| Creators: | Uwe Rascher (Author), Luis Alonso (Author), Andreas Burkart (Author), Chiara Cilia (Author), Sergio Cogliati (Author), Roberto Colombo (Author), Alexander Damm (Author), Matthias Drusch (Author), Luis Guanter (Author), Jan Hanus (Author), Timo Hyvärinen (Author), Tommaso Julitta (Author), Jouni Jussila (Author), Kari Kataja (Author), Panagiotis N. Kokkalis (Author), Stefan Kraft (Author), Thorsten Kraska (Author), Maria Matveeva (Author), Jose F. Moreno (Author), Onno Muller (Author), Cinzia Panigada (Author), Miroslav Pikl (Author), Francisco Pinto (Author), L. Prey (Author), Ralf Prude (Author), Micol Rossini (Author), Anke Schickling (Author), Ulrich Schurr (Author), Dirk Schüttemeyer (Author), Jochem Verrelst (Author), Frantisek Zemek (Author) |
| Publisher: | John Wiley & Sons Ltd |
| Publication Year: | 2017 |
Topic
| TR32 Topic: | Vegetation |
| Related Subproject: | D2 |
| Subjects: | Keywords: Airborne Measurements, Chlorophyll Fluorescence, Photosynthesis, Remote Sensing, Fluorescence, Vegetation |
File Details
| Filename: | Rascher_et_al_2015.pdf |
| Data Type: | Text - Article |
| Size: | 12 Pages |
| File Size: | 987 KB |
| Date: | Accepted: 26.05.2015 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Only Project Members |
| 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: | Global Change Biology |
| Volume: | 21 |
| Number of Pages: | 12 (4673 - 4684) |
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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| Page Visits: | 840 |
| Metadata Downloads: | 0 |
| Dataset Downloads: | 0 |
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