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Assessing the Carbon Cycle in South Africa: A BETHY/DLR Approach to Land Degradation

This study presents a comprehensive assessment of the carbon cycle in South Africa utilizing the BETHY/DLR model, emphasizing land degradation. We analyzed data from Envisat MERIS and GLC2000 to develop methods for land cover classification, aiming to quantify net primary production (NPP) and net ecosystem production (NEP) across diverse ecosystems like scrublands. Our approach also includes validation against satellite data and annual biomass statistics. The results highlight significant impacts on evapotranspiration and productivity metrics, contributing to a better understanding of carbon dynamics.

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Assessing the Carbon Cycle in South Africa: A BETHY/DLR Approach to Land Degradation

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  1. Estimating the Carbon Cycle of South Africa with BETHY/DLRAn Assessment Approach for Land DegradationMarkus Niklaus, Markus Tum, Kurt Günther, German Aerospace Center (DLR) EGU General Assembly 2010, Vienna

  2. Envisat MERIS, ESA 2004 Area of interest: South Africa GLC2000, JRC

  3. Data base Methodological development Results Land Cover Classification (GLC 2000, MODIS VCF) BETHY/DLR Biosphere Energy TransferHydrology Model Leaf Area Index (VEGETATION) Net-Primary-Production(NPP) Net-Ecosystem-Production(NEP) Photosynthesis Stomatal conductivity Light use efficiency Water balance Evapotranspiration Soil respiration Soil Types (FAO) Relief/Geopotential Meteorological Data (ECMWF) The Vegetation Model BETHY/DLR further information: Poster EGU2010-3945 at BG86

  4. Meteorological Input Data(Scrubland)

  5. Results: NPP Map for South Africa 2001 200 0 National NPP-Sum for the year 2001 130 MtC

  6. Results: Model Output for Scrubland-Pixel Gross- and Net Primary Productivity (GPP/NPP) Actual and potential Evapotranspiration (ATP/PTP)

  7. Validation / Comparison Validation with annual statistics about biomass stocks in semi-arid scrublands Validation Approach: EGU2010-4228 by Markus Tum at XL17 Comparison with products derived from satellite data MODIS GPP and NPP C-Fix VEGETATION Spot 5, CNES

  8. Thank you for your attention markus.niklaus@dlr.de Poster session today 17:30 – 19:00 This presentation: EGU2010-3945 (BG86) Validation approach: EGU2010-4228 (XL17)

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