6533b838fe1ef96bd12a3e02
RESEARCH PRODUCT
Exploring the spatial relationship between airborne-derived red and far-red sun-induced fluorescence and process-based GPP estimates in a forest ecosystem
Roberto ColomboSergio CogliatiYoungryel RyuUwe RascherBenjamin DechantPatrick RademskeFrédéric BaretDirk SchüttemeyerAnke SchicklingMicol RossiniG TagliabueCinzia PanigadaMirco MigliavaccaJochem Verrelstsubject
Forest ecosystems[SDV.SA]Life Sciences [q-bio]/Agricultural sciences010504 meteorology & atmospheric sciencesFIS/06 - FISICA PER IL SISTEMA TERRA E PER IL MEZZO CIRCUMTERRESTRE0208 environmental biotechnologyGEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIASpectral fitting methodSoil Science02 engineering and technology01 natural sciencesArticleCarbon cycleGEO/11 - GEOFISICA APPLICATAAtmospheric radiative transfer codesAirborne spectroscopyForest ecologySun-induced chlorophyll fluorescenceddc:550LUEEcosystemAPARSun-induced chlorophyll fluorescenceSpectral fitting methodPlant traitsINFORMGPPAPARLUEBESSForest ecosystemsHyPlantAirborne spectroscopyComputers in Earth SciencesChlorophyll fluorescenceBESS0105 earth and related environmental sciencesRemote sensingPlant traitsINFORMGEO/12 - OCEANOGRAFIA E FISICA DELL'ATMOSFERAGeology15. Life on land020801 environmental engineeringSpatial heterogeneityGEO/10 - GEOFISICA DELLA TERRA SOLIDA13. Climate actionHyPlantEnvironmental scienceSpatial variabilityGPPScale (map)description
International audience; Terrestrial gross primary productivity (GPP) plays an essential role in the global carbon cycle, but the quantification of the spatial and temporal variations in photosynthesis is still largely uncertain. Our work aimed to investigate the potential of remote sensing to provide new insights into plant photosynthesis at a fine spatial resolution. This goal was achieved by exploiting high-resolution images acquired with the FLuorescence EXplorer (FLEX) airborne demonstrator HyPlant. The sensor was flown over a mixed forest, and the images collected were elaborated to obtain two independent indicators of plant photosynthesis. First, maps of sun-induced chlorophyll fluorescence (F), a novel indicator of plant photosynthetic activity, were successfully obtained at both the red and far-red peaks (r2 = 0.89 and p 0.05). The spatial relationships found at high resolution provide valuable insight into the critical role of spatial heterogeneity in controlling the relationship between the far-red F and the GPP, indicating the need to consider this heterogeneity at a coarser resolution.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-09-01 |