Spectral polarization of clear and hazy coastal skies

Spectral polarization of clear and hazy coastal skies.

Linear polarization of the clear daytime sky has often been measured as a spectrally integrated or quasi-monochromatic variable, but seldom as a spectral one. So we use a hyperspectral imaging system to measure skylight polarization at high spectral and angular resolutions for clear and hazy skies at our coastal site. The resulting polarization maps and spectra exhibit both commonalities and di...

Tropospheric haze and colors of the clear daytime sky.

To casual observers, haze's visible effects on clear daytime skies may seem mundane: significant scattering by tropospheric aerosols visibly (1) reduces the luminance contrast of distant objects and (2) desaturates sky blueness. However, few published measurements of hazy-sky spectra and chromaticities exist to compare with these naked-eye observations. Hyperspectral imaging along sky meridians...

Vertical Illuminance Measurement for Clear Skies in Tehran

Measured and modelled UV under clear skies at four sites

Towards closure between measured and modelled UV under clear skies at four diverse sites J. Badosa, R. L. McKenzie, M. Kotkamp, J. Calbó, J. A. González, P. V. Johnston, M. O’Neill, and D. J. Anderson Departament de Fı́sica, Grup de Fisica Ambiental, Universitat de Girona, Girona, Spain National Institute of Water and Atmospheric Research (NIWA), Lauder, New Zealand Cooperative Institute for Res...

Commentary I: skin cancer: clear skies sometimes help.