Abstract: Multi-wavelength sun photometry has been a subject of interest in meteorology for two and a half centuries. The technique provides a quantitative index that relates to total suspended aerosol in the atmospheric air column ...

Abstract: Analysis is presented of 800 measurements of atmospheric monochromatic aerosol optical depth made poleward of ?65° latitude. The atmosphere of the southern polar region appears to be uncontaminated but is charged with a ...

Abstract: The arctic atmosphere is the repository for surprisingly high concentrations of pollutants throughout the winter months. The polluted air mass in question includes virtually all the atmosphere above the Arctic Circle and ...

Abstract: Aerosols in central Alaskan winter air mass system were classified according to size by diffusive separation and light-scattering spectrometry. Particles entering central Alaska from the Pacific Marine environment had ...

Abstract: Ozone content in the atmospheric column above Mauna Loa Observatory, Hawaii, was determined in experiments by measuring the attenuation of sunlight in the visible spectrum Chappuis bands (500 nm<?<700 nm wavelength). The ...

Abstract: A cloud of aerosol with optical thickness τ ≈ 0.18 (500 nm wavelength), passed over the Hawaiian Islands from late April to early May 1979. Vertical profiles, taken by evaluating the optical extinction coefficient by sun ...

Abstract: The spectral attenuation of sunlight passing through the atmosphere was determined with the Langley method for 110 clear days and at 11 wavelengths to an accuracy of δτ=±0.002 (τ is the optical thickness) at the Mauna Loa ...

Abstract: Two recent volcanic eruptions (Volcan del Fuego in Guatemala, October 1974, and Ngauruhoe in New Zealand, 19 February 1975) may have populated the stratosphere with sufficient ash to create large-scale stratospheric dust ...

Abstract: Noncrustal vanadium and manganese are used as chemical tracers for pollution-derived aerosols (collected over a period of four years in the near-surface air at Barrow, Alaska), in order to investigate tropospheric long-range ...

Abstract: By analysing two sets of atmospheric solar measurements, Laulainen and Taylor conclude that conventional Volz sunphotometry is subject to considerable error arising from apparent day-to-day variation in J0, the zero-airmass ...