ABoVE: Corrected MODIS MAIAC Reflectance at Tower Sites, Alaska and Canada, 2000-2016

Description

This dataset provides angular corrections of MODIS Multi-Angle Implementation of Atmospheric Correction algorithm (MAIAC) surface reflectances by two methods at each of 62 flux tower sites (1 km x 1 km area) across the ABoVE domain in Alaska and western Canada from 2000 to 2015/2016. The original MAIAC reflectance data were corrected to consistent view and illumination angles (0 degree view zenith angle and 45 degree of sun zenith angle) using two independent algorithms: the first based on the original BRDF (Bidirectional Reflectance Distribution Function) parameters provided by the MAIAC team, and the second based on a machine learning approach (random forests). The corrected data preserve the original MAIAC data's sub-daily temporal resolution and 1 km spatial resolution with seven land bands (bands 1-7) and five ocean bands (bands 8-12). The resulting tower site sub-daily timeseries of angular corrected surface reflectances are suitable for long-term studies on patterns, processes, and dynamics of surface phenomena.

Resources

Name Format Description Link
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.3334%2FORNLDAAC%2F1700
21 This link allows direct data access via Earthdata login https://daac.ornl.gov/above/MODIS_MAIAC_Reflectance/
21 ORNL DAAC Data Set Documentation https://daac.ornl.gov/ABOVE/guides/MODIS_MAIAC_Reflectance.html
21 Data set Landing Page DOI URL https://doi.org/10.3334/ORNLDAAC/1700
21 ABoVE project site https://above.nasa.gov
34 MAIAC tiles, flux sites with their IGBP classes, and ABoVE core and extended domain boundaries. IGBP classes: DBF-deciduous broadleaf forests; ENF-evergreen needleleaf forests; GRA-grasslands; MF-mixed forests; OSH-open shrubland; WET-permanent wetland; OSH-open shrubland; WET-permanent wetland (Yu et al., 2019, in preparation). https://daac.ornl.gov/ABOVE/guides/MODIS_MAIAC_Reflectance_Fig2.png
33 ABoVE: Angular Correction of MODIS MAIAC Surface Reflectance, AK and CA, 2000-2016: MODIS_MAIAC_Reflectance.pdf https://data.ornldaac.earthdata.nasa.gov/public/above/MODIS_MAIAC_Reflectance/comp/MODIS_MAIAC_Reflectance.pdf

Tags

  • land-surface
  • national-geospatial-data-asset
  • ngda
  • surface-radiative-properties
  • earth-science

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