Published Date
, Volume 20, Issue 2, pp 281–292
Abstract
To evaluate changes in surface albedo and net shortwave radiation caused by land-use changes, we developed a simple model using the MicroMet/SnowModel. Simulated results were compared with plot-scale observations and verified with reasonable agreement, following which we simulated surface albedo and net shortwave radiation over a large domain (0.5° × 0.5°, 100-m resolution). We found that the histogram of spatial distribution of net shortwave radiation could assume a Gaussian distribution in the case of uniform land use, despite complex topography. However, complex land use within the domain caused two histogram peaks with large standard deviation, meaning that a Gaussian distribution could not be assumed. For such complex land use, the spatial distribution of net shortwave radiation was determined by surface albedo, which was found to be strongly related to land use. For natural forest cover within the domain, the spatial distribution of net shortwave radiation was found to be related to slope azimuth angle, but surface albedo had only minor effect. For regenerated forest, net shortwave radiation was influenced by surface albedo rather than slope azimuth angle. Simulated results for bare ground within the domain were related to surface albedo and altitude, because higher altitudes had longer periods of snow cover and much greater snow accumulation. Overall, land-use changes were more important than orographic effects in the evaluation of net shortwave radiation.
References
For further details log on website :
http://link.springer.com/article/10.1007/s10310-015-0478-1
, Volume 20, Issue 2, pp 281–292
Title
Variations of winter surface net shortwave radiation caused by land-use change in northern Hokkaido, Japan
Abstract
To evaluate changes in surface albedo and net shortwave radiation caused by land-use changes, we developed a simple model using the MicroMet/SnowModel. Simulated results were compared with plot-scale observations and verified with reasonable agreement, following which we simulated surface albedo and net shortwave radiation over a large domain (0.5° × 0.5°, 100-m resolution). We found that the histogram of spatial distribution of net shortwave radiation could assume a Gaussian distribution in the case of uniform land use, despite complex topography. However, complex land use within the domain caused two histogram peaks with large standard deviation, meaning that a Gaussian distribution could not be assumed. For such complex land use, the spatial distribution of net shortwave radiation was determined by surface albedo, which was found to be strongly related to land use. For natural forest cover within the domain, the spatial distribution of net shortwave radiation was found to be related to slope azimuth angle, but surface albedo had only minor effect. For regenerated forest, net shortwave radiation was influenced by surface albedo rather than slope azimuth angle. Simulated results for bare ground within the domain were related to surface albedo and altitude, because higher altitudes had longer periods of snow cover and much greater snow accumulation. Overall, land-use changes were more important than orographic effects in the evaluation of net shortwave radiation.
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For further details log on website :
http://link.springer.com/article/10.1007/s10310-015-0478-1
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