Snow Cover Maps from MODIS Images at 250 m Resolution, Part 2: Validation
AbstractThe performance of a new algorithm for binary snow cover monitoring based on Moderate Resolution Imaging Spectroradiometer (MODIS) satellite images at 250 m resolution is validated using snow cover maps (SCA) based on Landsat 7 ETM+ images and in situ snow depth measurements from ground stations in selected test sites in Central Europe. The advantages of the proposed algorithm are the improved ground resolution of 250 m and the near real-time availability with respect to the 500 m standard National Aeronautics and Space Administration (NASA) MODIS snow products (MOD10 and MYD10). It allows a more accurate snow cover monitoring at a local scale, especially in mountainous areas characterized by large landscape heterogeneity. The near real-time delivery makes the product valuable as input for hydrological models, e.g., for flood forecast. A comparison to sixteen snow cover maps derived from Landsat ETM/ETM+ showed an overall accuracy of 88.1%, which increases to 93.6% in areas outside of forests. A comparison of the SCA derived from the proposed algorithm with standard MODIS products, MYD10 and MOD10, indicates an agreement of around 85.4% with major discrepancies in forested areas. The validation of MODIS snow cover maps with 148 in situ snow depth measurements shows an accuracy ranging from 94% to around 82%, where the lowest accuracies is found in very rugged terrain restricted to in situ stations along north facing slopes, which lie in shadow in winter during the early morning acquisition.
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Notarnicola, C.; Duguay, M.; Moelg, N.; Schellenberger, T.; Tetzlaff, A.; Monsorno, R.; Costa, A.; Steurer, C.; Zebisch, M. Snow Cover Maps from MODIS Images at 250 m Resolution, Part 2: Validation. Remote Sens. 2013, 5, 1568-1587.
Notarnicola C, Duguay M, Moelg N, Schellenberger T, Tetzlaff A, Monsorno R, Costa A, Steurer C, Zebisch M. Snow Cover Maps from MODIS Images at 250 m Resolution, Part 2: Validation. Remote Sensing. 2013; 5(4):1568-1587.Chicago/Turabian Style
Notarnicola, Claudia; Duguay, Martial; Moelg, Nico; Schellenberger, Thomas; Tetzlaff, Anke; Monsorno, Roberto; Costa, Armin; Steurer, Christian; Zebisch, Marc. 2013. "Snow Cover Maps from MODIS Images at 250 m Resolution, Part 2: Validation." Remote Sens. 5, no. 4: 1568-1587.