Physics
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.7429a&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, May 20, 1990, p. 7429-7434. Research supported by the U.S. Navy.
Physics
50
Atmospheric Scattering, Light (Visible Radiation), Ozone Depletion, Polar Regions, Twilight Glow, Ultraviolet Radiation, Albedo, Atmospheric Models, Cloud Cover, Photodissociation, Stratosphere
Scientific paper
The polar twilight atmosphere is different from that at mid-latitude in several ways which lead to significant changes in the wavelength-dependent radiation field. Ozone depletion in the stratosphere leads to increased scattering below 340 nm. Polar stratospheric clouds produce changes in the radiation field which depend on cloud height and thickness. A surface albedo near unity produces a large increase in scattering. Multiple scattering becomes a larger percentage of the radiation field as solar zenith angle increases. These perturbations on the radiation field lead to enhanced ozone destruction in the stratosphere, increased surface irradiance, and a significant wavelength-dependent increase in nadir radiance.
Anderson Donald E. Jr.
Lloyd Steven A.
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