203
MODIS-Based Snow Cover Products, Validation, and Hydrologic Applications
increased from 0.67 to 0.70 if MODIS data were used for calibration as compared
to the case where no MODIS data were used. As an example, Figure 9.3 shows a
comparison of MODIS snow patterns and snow simulations based on a hydrological model. In one variant (center panel), the model was calibrated to runoff alone,
while in the other variant (lower panel), the model was calibrated to both runoff and
MODIS snow cover. Particularly in the eastern part of the region, the improvements
of the snow simulations by the use of MODIS are apparent.
A more detailed analysis of the value of MODIS data is presented in Figure 9.4.
A conceptual hydrologic model (in detail described, e.g., by Parajka et al. 2007) has
MODIS
Simulated (without MODIS)
Simulated (with MODIS)
Land
Snow
Clouds/No data
200 km
FIGURE 9.3 Comparison of MODIS (MOD10A1) snow cover data (top panel) with snow
simulations with (bottom panel) and without (center panel) using MODIS for the model calibration. The region shown is part of the Eastern Alps on May 2, 2001.
MODIS-Based Snow Cover Products, Validation, and Hydrologic Applications
increased from 0.67 to 0.70 if MODIS data were used for calibration as compared
to the case where no MODIS data were used. As an example, Figure 9.3 shows a
comparison of MODIS snow patterns and snow simulations based on a hydrological model. In one variant (center panel), the model was calibrated to runoff alone,
while in the other variant (lower panel), the model was calibrated to both runoff and
MODIS snow cover. Particularly in the eastern part of the region, the improvements
of the snow simulations by the use of MODIS are apparent.
A more detailed analysis of the value of MODIS data is presented in Figure 9.4.
A conceptual hydrologic model (in detail described, e.g., by Parajka et al. 2007) has
MODIS
Simulated (without MODIS)
Simulated (with MODIS)
Land
Snow
Clouds/No data
200 km
FIGURE 9.3 Comparison of MODIS (MOD10A1) snow cover data (top panel) with snow
simulations with (bottom panel) and without (center panel) using MODIS for the model calibration. The region shown is part of the Eastern Alps on May 2, 2001.