A clear‐sky spectral solar radiation model for snow‐covered mountainous terrain
A clear‐sky spectral solar radiation model for snow‐covered mountainous terrain
复制标题
DOI：
10.1029/wr016i004p00709
复制
发表时间：
1980-08
影响因子：
5.4
通讯作者：
J. Dozier
中科院分区：
文献类型：
--
作者：
J. Dozier
晴空光谱太阳辐射模型用于直接通量和漫射通量，结合数字地形数据的地形计算，可以计算山区雪地表面任何一点的入射、净或反射太阳辐射。辐射可以在250至5000nm的任何波长范围内或在任何时间步长上进行积分。大气衰减参数为臭氧、水蒸气、埃斯特浊度系数和指数、大气气溶胶的吸反比。该模型通过寻找一组超确定的非线性方程的最小二乘解，从可能包含系统误差和随机误差的测量中得出这些误差。对于特定区域的计算，它采用了查表过程，使得谱模型的计算速度接近于集总模型。因此，它可能是有用的一部分，积雪表面的能量预算计算在流域。
A clear-sky spectral solar radiation model for direct and diffuse fluxes, combined with topographic calculations from digital terrain data, computes either incident, net, or reflected solar radiation at any point on a snow surface in mountainous terrain. The radiation may be integrated over any wavelength range from 250 to 5000 nm, or over any time step. Atmospheric attenuation parameters are ozone, water vapor, the Angstrom turbidity coefficient and exponent, and the absorptance to reflectance ratio of the atmospheric aerosols. The model derives these, from measurements which may contain both systematic and random errors, by finding the least squares solution to an overdetermined set of nonlinear equations. For calculations over a specified area, it employs table look-up procedures, so that computation speed for the spectral model approaches that for a lumped model. Thus it may be useful as part of a snow surface energy budget calculation over a drainage basin.