Description: Das Projekt "Wuestenbildungsprozesse im Mittelmeerbereich und ihre Wechsselbeziehungen zum globalen Klima - Untergruppe V: Fernerkundung und radiometrische Oberflaecheneigenschaften: Auswertung des Fortschreitens der Wuestenbildung aus dem Weltall" wird vom Umweltbundesamt gefördert und von Freie Universität Berlin, Institut für Meteorologie WE03 durchgeführt. This first part of the project deals with the calibration and intercalibration of remote sensing data (NOAA-AVHRR and LANDSAT images), gathered during the EFEDA 1991 field experiment and the application of corrections for aspect angle, surface emissivity, and atmospheric effects. Data from other observation systems will be included as they become available. The accuracy of the inferred informations is determined by intercomparisons with ground based measurements made under controlled conditions. Surveys will be carried in the experimental area to obtain more information about the angular distribution of the reflected solar radiation over the different plant communities in dependence of the physiological and structural parameters of the plant-soil systems. A major effort will be made to relate directional reflectances, surface temperatures and vegetation indices derived from the spectral measurements made in space to energy and water fluxes between the surface and the atmosphere measured by the EFEDA flux groups and vegetation parameters observed at the surface by the EFEDA vegetation group. The second part of the project deals with the determination of area averages and the study of temporal changes. Validated information derived from the satellite data will be scaled up into a size comparable with the grid width of global models to support the determination of energy and water exchanges between the surface and the atmosphere, and the definition of a desertification index based on satellite observations. For this purpose time series of these data will be analysed with respect to interannual changes related to the weather development and possible trends. An attempt will be made to correlate cumulative annual data of vegetation index with biomass production. The broadening of the geographical scope of EFEDA will be prepared by processing NOAA-AVHRR satellite data for the whole of the Mediterranean coastal zone which can be provided to users with information about the applied corrections and interpretation aids.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Pflanzenphysiologie ? Vegetation ? Berlin ? Kalibrierung ? Meteorologie ? Pflanzengesellschaft ? Satellitendaten ? Solarstrahlung ? Bodentemperatur ? Fernerkundungsdaten ? Radiometrie ? Satellit ? Desertifikation ? Globales Klima ? Daten ? Energiebilanz ? Globalmodell ? Klimamodell ? Reflexion ? Studie ? Zeitreihe ? Küstenregion ? Verbreitungsgebiet ? Weltraum ? Fernerkundung ? Wasserhaushalt ? Wetter ? Freilandversuch ? Atmosphäre ? Biomasse ? Kenngröße ? Globale Aspekte ? Atmosphärische Korrektur ? Klima ? Erdoberfläche ? LANDSAT ? NOAA-AVHRR ? EFEDA ?
Region: Berlin
Bounding box: 10.44987° .. 10.44987° x 54.03573° .. 54.03573°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1993-08-01 - 1996-01-31
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