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| 001 | 834376 | ||
| 005 | 20210129230635.0 | ||
| 024 | 7 | _ | |a 2128/14802 |2 Handle |
| 037 | _ | _ | |a FZJ-2017-04344 |
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| 100 | 1 | _ | |a Matveeva, Maria |0 P:(DE-Juel1)130098 |b 0 |e Corresponding author |u fzj |
| 111 | 2 | _ | |a 10th EARSeL SIG Imaging Spectroscopy Workshop |c Zurich |d 2017-04-19 - 2017-04-21 |w Switzerland |
| 245 | _ | _ | |a Spatial Fluorescence Patterns in a Heterogeneous Agriculture Landscape |
| 260 | _ | _ | |c 2017 |
| 336 | 7 | _ | |a Conference Paper |0 33 |2 EndNote |
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| 520 | _ | _ | |a Spatial Fluorescence patterns in a heterogeneous agriculture landscapeMaria Matveeva1, Patrick Rademske1, Alexander Damm2, Cosimo Brogi3, Guido Waldhoff4, and Uwe Rascher11 Institute of Bio- and Geosciences, IBG-2: Plant Sciences, Forschungszentrum Jülich GmbH, Leo-Brandt-Str., 52425 Jülich, Germany2 Remote Sensing Laboratories, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland3 Institute of Bio- and Geosciences, IBG-3: Agrosphere, Forschungszentrum Jülich GmbH, Leo-Brandt-Str., 52425 Jülich, Germany4 Institute of Geography, University of Cologne, Albertus-Magnus-Platz , D-50923 Cologne, GermanySun induced fluorescence (F) is a remote sensing signal that is emitted from the core of the photosynthetic machinery. The fluorescence signal has the potential to quantify the actual rate of photosynthesis and is closely related to vegetation stress and reflects functional limitations of photosynthetic carbon gain. F is a rather weak signal, but can be measured in the solar and atmospheric absorption lines using high performance spectrometers.The increased interest of the scientific community to the remote sensing of sun-induced chlorophyll fluorescence (F) leads to a large number of fruitful and interesting experiments on the field scale. On the other side, satellite data became available, from which fluorescence on the global scale can be derived. However, it is still an open question, how representative the results of field experiments are for a larger (regional) scale. Fluorescence of the same crop strongly varies depending on the season, soil moisture, nutrient availability, etc.To evaluate the heterogeneity of fluorescence (F) and vegetation indices (VI) within and between fields and for a better understanding of the link between F and biophysical parameters, the agriculture area in Nordrhein-Westfalen (Germany) was chosen for measurements. We have collected data using the high performance imaging spectrometer HyPlant, which is a dedicated fluorescence spectrometer and allows measuring radiance in the wavelength range between 400 nm and 2500 nm, and between 670 nm and 780 nm with a high spectral resolution of 0.26 nm allowing the measurement of both fluorescence peaks. Data were recorded with a spatial resolution of 3 meter per pixel for the whole region (ca. 14×14 km) and with 1 m resolution for the Selhausen area (ca. 1.5×5 km). That area was better characterized in terms of land use classification, soil moisture, geophysical measurements, leaf area index (LAI), defined soil properties and the presence of an Eddy Covariance tower.In this work, we investigate the within and between species variability of red, far-red, integrated fluorescence and vegetation indices, from which such biophysical parameters as LAI, chlorophyll content, fractional cover etc. can be calculated. Considering the land use classification it is possible to choose the fields with the same crop type in the whole investigated area and find a distribution of F emission of main regional crops such as winter wheat, winter barley, sugar beet and corn. |
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