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Approach for validation of geoland2 products: phenological vegetation trends over Europe R. Lacaze 1 , P. Cayrol 2 , F.

Approach for validation of geoland2 products: phenological vegetation trends over Europe R. Lacaze 1 , P. Cayrol 2 , F. Baret 3 1 HYGEOS, 2 Spot image, 3 INRA. Outline. The Geoland-2 project Context: GMES & Land Monitoring Core Service (LMCS)

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Approach for validation of geoland2 products: phenological vegetation trends over Europe R. Lacaze 1 , P. Cayrol 2 , F.

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  1. Approach for validation of geoland2 products: phenological vegetation trends over Europe R. Lacaze1, P. Cayrol2, F. Baret3 1HYGEOS, 2Spot image, 3INRA

  2. Outline • The Geoland-2 project • Context: GMES & Land Monitoring Core Service (LMCS) • Objective, concept and structure of the project • Validation of biophysical variables • Phenology in geoland2 • Definition of metrics • Methodology • Products • How to validate ? 2

  3. Context • Global Monitoring for Environment and Security (GMES) aims at providing, on a sustained basis, reliable and timely geo-information services related to environmental and security issues in support of public policy makers’ needs • GMES is an EU-led initiative, in which ESA implements the space component and the European Commission manages actions for developing services, relying on both in-situ and space-borne remote sensing data. • GMES is the European contribution to GEO/GEOSS • GMES basic architecture • Infrastructures: In-situ and Space data • Core Services : Generic products • Down-stream services: End-users applications • “Fast Track” Services • Marine Monitoring • Emergencies Response • Land Monitoring 3

  4. FP7 Fast Track Service Land project: geoland2 • Objectives: • To prepare, validate, and demonstrate pre-operational service chains and products of the LMCS • To propose the specific functional organisation of LMCS

  5. geoland2 : Functional view 3 Core Mapping Services Euroland (Land Cover) BioPar ( Biophysical Products) SATChMo (Seasonal Monitoring) 7 Core Information Services Land Carbon Global Crop Monitoring Natural Resource Monitoring in Africa (NARMA) Agri-Environment Forest Water Spatial Planning 5

  6. geoland2 : links between CMS and CIS 6

  7. Validation of BioPar products • Following the guidelines defined by LPV sub-groups • Biophysical: LAI, FAPAR, FCover • Surface radiation: Albedo • Land Surface Temperature • Fire & Burnt Areas • Soil moisture • Generic approach: • Inter-comparison with other existing products • Spatial consistency • Overall evaluation of products (maps, difference maps) • Statistical analysis (RMSE, bias, r) • Temporal consistency • Direct validation • Ground local measurements • HR maps

  8. Phenology in geoland2 • Definition of phenological metrics: • Start of growing season (a) : first date when value = MinValLeft + 10% • End of season (b) : second date when value = MinValRight + 10% or value = MaxVal – 90% • Maximum of growing season (e) : time for peak • Length of season (g) : length = End (b) – Start (a). • Time for the mid of the season (e) : computed as the mean value of the times corresponding to 30% of the amplitude a b e a g b i g FCover i a b e

  9. Phenology in geoland2 – Methodology - 1 Temporal seriesMERIS data Corine Land Cover 2006 • Pixel extraction of vegetation classes • FCOVER averaged per analysis unit (e.g. hydro units) BiophysicalProcess Hydro units FCOVER maps (pixel scale)

  10. Phenology in geoland2 – Methodology - 2 Start of growing season End of season Length of season

  11. Phenology in geoland2 - Products • Spatial coverage: • Adour-Garonne Basin + Marne Basin (France) derived from MERIS FCOVER, 300m resolution • Poland, Swedish & Finnish sites derived from MODIS NDVI, 250m resolution • Temporal coverage: • From 2009 to 2012 • Updated every 10 days

  12. Phenology in geoland2 – Validation approach • Same approach as for Biophysical variables: • Inter-comparison with existing satellites products: comparison MERIS / MODIS products in geoland2 • Comparison with in-situ data • SnowCarbo project network: phenological observations 2001-2008, birch, scotts pines • Flux measurements stations: start and end of photosynthetic active period • COST Action: “Establishing a European data platform for climatological applications” has listed phenological networks http://www.pik-potsdam.de/~rachimow/epn/html/frameok.html • Collaboration with PHAVEOS project ?

  13. Portal, Contacts • Access to geoland2 products: • http://www.geoland2.eu • Biophysical products: • BioPar Task Manager: Roselyne Lacaze, rl@hygeos.com • Scientific contact for vegetation products: Frederic Baret, baret@inra.fr • Phenology product from MERIS: • Scientific contact: Pascale Cayrol, pascale.cayrol@infoterra.fr

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