lp 2013 diversity -...
Transcript of lp 2013 diversity -...
Ute Gangkofner1*, Carsten Brockmann2, Marc Paganini3, Gregor Ratzmann4,1, Florence Stoeger1, Olaf Danne1, Per Wramner5, José Brito6, Rasmus Fensholt4, Kurt Günther7�
�1 GeoVille Information Systems GmbH, Sparkassenplatz 2, A-6020 Innsbruck, Austria; 2 Brockmann Consult, Max-Planck-Str. 2, D-21502 Geesthacht, Germany; 3 European Space Agency (ESA), ESRIN, Via Galileo Galilei,
Casella Postale 64, I-00044 Frascati, Italy; 4 Department of Geography and Geology, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen, Denmark; 5 Brockmann Geomatics Sweden AB, Torshamnsgatan 39, S-164 40 Kista, Sweden; 6 Centro de Investigação em Biodiversidade e Recursos
Genéticos da Universidade do Porto (CIBIO), Instituto de Ciências Agrárias de Vairão, R. Padre Armando Quintas, P-4485-661 Vairão, Portugal; 7 German Aerospace Center (DLR), German Remote Sensing Data
Center (DFD), Münchener Straße 20, D-82234 Oberpfaffenhofen, Germany�* Corresponding Author: Ute Gangkofner, [email protected] Tel: +43 512 562021-19�
Envisat MERIS Data for Global Dryland Monitoring
Overview
• Drylands part of ESA DUE Diversity II
• Exploi>ng 10 years of Envisat MERIS FR data
• EO based contribu>on to the Conven>on on Biological Diversity (CBD)
Specific Aim
• EO based framework to monitor global dryland biodiversity
• Provide poten>al users with relevant and informa>ve GIS products
Test site selec>on by aridity index threshold, WWF ecoregion, protec>on status and other
Global Dryland Test Sites
Data Base • Biophysical data: MERIS JRC fAPAR, AVHRR GIMMS NDVI3g
• Ancillary data: TRMM 3B42/3B43 v7 precipita>on es>mates, GPCP v2.2 precipita>on es>mates, CCI SoilMoisture es>mates
• Addi>onal biodiversity relevant informa>on: protec>on status, GlobCover land cover maps and other
• In-‐situ data for EO data valida>on
Example: Test Site 12, Southern Africa MERIS fAPAR >me series for different GlobCover land cover classes
Project Output Products • Status, change and trends of vegeta>on phenology based NPP proxies
• Status, change and trends of ancillary clima>c factors (rainfall, soil moisture)
• Status, change and trends of rain use efficiency and soil moisture use efficiency
• All products with a spa>al reference to administra>ve borders, land cover and protec>on status
Extrac>on of Vegeta>on Phenology
• NPP proxies derived from important phenological descriptors, such as start of season, vegeta>on year, cyclic frac>on, length of growing season, avarage dry season fAPAR and other
• Analogous extrac>on of clima>c factors • Results are annual NPP proxies and ancillary datasets
Efficiency Indices
Normaliza>on of NPP proxies for clima>c constraints such as rainfall and soil moisture:
Rain use efficiency :
RUE = NPP proxy / precipita>on Soil moisture use efficiency :
SMUE = NPP proxy / soil mositure
Status and Change
• Status: annual NPP proxies, ancillary data and efficiency parameters
• Change: Integra>on of 3 consecu>ve years by averaging, consequent comparison of change between different 3 year periods
Calcula>on of Trends
• Linear median slope trends: Non-‐parametric trend operator acer Theil (1950) and Sen (1968)
• Consequent test on trend significance acer Mann (1945) and Kendall (1975)
Relevance for Biodiversity
• EO status/change/trend phenomena related to biodiversity and/or land degrada>on: biodiversity indicators
• Example: Land degrada>on and loss of biodiversity caused by woody plant encroachment in Namibian grass lands detectable in NPP proxy trends
Aggregated Products
Final products are aggregated by:
» administra>ve borders, » land cover classes » protec>on status » degree of change/trend