Gedzelman Stanley David
Department of Earth and Atmospheric Sciences, NOAA CREST Center, City College of New York, New York, New York 10031, USA.
Appl Opt. 2005 Sep 20;44(27):5723-36. doi: 10.1364/ao.44.005723.
A model (SKYCOLOR) is developed that simulates the light and color of the sky and open cloud decks in the vertical plane including the Sun and the observer and animates the changes as the Sun goes down. Model skylight consists of sunbeams that are scattered toward the observer, but depleted by scattering and absorption in the Chappuis bands of ozone. SKYCOLOR includes the Earth's curvature, atmospheric refraction, cloud shadows, and solar eclipses. Scattering is given a wavelength (lambda) dependence of lambda(-4) for air molecules (Rayleigh scattering), lambda(-1) for tropospheric aerosols, and lambda(+1) for volcanic aerosol particles. Multiple scattering is calculated directly in clouds but is parameterized in clear air by decreasing the scattering rates of sunlight and of skylight in the Earth's shadow by 30%.
开发了一种模型（SKYCOLOR），它可以模拟垂直平面内天空和开阔云层的光线和颜色，包括太阳和观察者，并随着太阳下山动态呈现变化。模型中的天光由射向观察者的太阳光束组成，但在臭氧的夏皮伊带中会因散射和吸收而减弱。SKYCOLOR考虑了地球曲率、大气折射、云影和日食。对于空气分子，散射的波长（λ）依赖性为λ（-4）（瑞利散射）；对于对流层气溶胶，为λ（-1）；对于火山气溶胶颗粒，为λ（+1）。多次散射在云层中直接计算，但在晴空条件下通过将地球阴影中太阳光和天光的散射率降低30%进行参数化。
