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How Forward-Scattering Snow and Terrain Change the Alpine Radiation Balance With Application to Solar Panels
Journal of Geophysical Research: Atmospheres ( IF 4.4 ) Pub Date : 2021-07-19 , DOI: 10.1029/2020jd034333
F. Rütte 1 , A. Kahl 1, 2 , J. Rohrer 3 , M. Lehning 1, 2
Affiliation  

Rough terrain in mid- and high latitudes is often covered with highly reflective snow, giving rise to a very complex transfer of incident sunlight. In order to simplify the radiative transfer in weather and climate models, snow is generally treated as an isotropically reflecting material. We develop a new model of radiative transfer over mountainous terrain, which considers for the first time the forward scattering properties of snow. Combining ground-measured meteorological data and high resolution digital elevation models, we show that the forward scattering peak of snow leads to a strong local redistribution of incident terrain reflected radiation. In particular, the effect of multiple terrain reflections is enhanced. While local effects are large, area-wide albedo is only marginally decreased. In addition, we show that solar panels on snowy ground can clearly benefit from forward scattering, helping to maximize winter electricity production.

中文翻译:

前向散射的雪地和地形如何通过应用于太阳能电池板改变高山辐射平衡

中高纬度地区的崎岖地形通常覆盖着高反射性的雪,导致入射阳光的传输非常复杂。为了简化天气和气候模型中的辐射传递,通常将雪视为各向同性反射材料。我们开发了一种新的山区辐射传输模型,该模型首次考虑了雪的前向散射特性。结合地面测量的气象数据和高分辨率数字高程模型,我们表明雪的前向散射峰导致入射地形反射辐射的强烈局部重新分布。特别是增强了多次地形反射的效果。虽然局部效应很大,但区域范围的反照率仅略微降低。此外,
更新日期:2021-08-17
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