ORNL DAAC: Introduction Bob Cook ORNL DAAC Environmental Sciences Division Oak Ridge National Laboratory.

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Presentation transcript:

ORNL DAAC: Introduction Bob Cook ORNL DAAC Environmental Sciences Division Oak Ridge National Laboratory

2 NASA’s Earth Observing System (EOS) Program –centerpiece of NASA’s Earth Science Division and largest component in the U.S. Climate Change Science Program –space-based observing system –ground-based field campaigns –objective is to enable quick and easy access to data about the earth EOS Data and Information System –planned and funded by NASA to make maximum use of the data –data available from 12 Data Centers, organized by scientific discipline –ORNL DAAC focuses on biogeochemical dynamics and ecological data The Earth Observing System (EOS) Program

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4 ORNL DAAC: What’s that? Oak Ridge National Laboratory Distributed Active Archive Center Archive data products produced by projects within NASA’s Terrestrial Ecology Program Mission: –assemble, distribute, and provide data services for a comprehensive archive of terrestrial biogeochemistry and ecological dynamics observations and models to facilitate research, education, and decision-making in support of NASA’s Earth science. ORNL DAAC’s Web Site daac.ornl.govdaac.ornl.gov

5 ORNL DAAC: Data Collections 3. Regional and Global Studies (176) Studies (176) Climate Soils Vegetation Hydroclimatology 2. Validation of Remote Sensing Products (21) (Number of Data Sets = 876) 1.Field Campaigns (670) 6-9 year intensive study of a region: Amazon (LBA) Northern Canada (BOREAS) Southern Africa (SAFARI 2000) BOREAS LBA S2K In-situ Observations ? Remote Sensing LAI/fPAR NPP LAI/fPAR NPP 4. Model Code (9) Benchmark Models IBIS, BIOME-BGC, LSM Manuscript Models PNeT, Century, Biome-BGC

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7 MODIS Land Product Subsetting Tools –In a scale and format (text, GeoTIFF) useful for field researchers Three methods to obtain subsets 1.Tool for 1,147 selected sites 2.Tool for any user selected location on demand User selects product, time period, location, and area (1 x 1 km up to 200 x 200 km) worldwide and for user-selected time periods 3. WebService Programmatically obtain MODIS subsets for any land location, time period and area (from 1 pixel up to 201 x 201 km) using a standards based SOAP Web Service 1,147 field sites for MODIS Collection 5 Center Pixel Mean Value of Pixels Percent of Pixels that meet QC Criteria EVI in Southern California MODIS Land Products (C5) at ORNL DAAC Surface Reflectance (M*D09A1) Surface Temperature (M*D11A2) Land Cover (MCD12Q1) Vegetation Phenology (MCD12Q2) NDVI / EVI (M*D13Q1) LAI / fPAR (M*D15A2) Net Photosynthesis (MOD17A2) Annual NPP (MOD17A3) Albedo (calc) (from MCD43A1,2) Reflectance – BRDF Adjusted (MCD43A2,4) December 2003 fire

8 Spatial Data Access Tool Goals / Motivation ORNL DAAC has been charged with making spatial data readily available to users –Spatial Data: remote sensing, map layers, and model output Purpose: –Develop, assess, and drive biogeochemical models –Understanding dynamics of ecosystems –Assessing the accuracy and uncertainty of remote sensing products (i.e., Validation)

Reproject, Resample, Subset Download data in various file formats Can view map in Google Earth Detailed granule level Metadata Open Geospatial Consortium (OGC)–based WMS: Web Map Server (map) WCS: Web Coverage Server (data) OGC WMS map Detailed Metadata Many Download Options OGC WCS Download Spatial Data Access Tool (SDAT)

10 Web Resources ORNL DAAC MODIS Land Product Subsets Spatial Data Access Tool