Atmospheric turbidity at the Antarctic coastal station Georg-von-Neumayer (70 deg S, 8 deg W, 40 m MSL)
Journal Article
·
· Journal of Applied Meteorology; (United States)
- Innsbruck Univ. (Austria)
Spectral actinometric measurements of direct solar radiation were made on all 17 clear days during 1981/1982. From broadband measurements using cutoff filters, a number of common measures for aerosol extinction as well as precipitable-water content of the atmosphere were derived by numerical analysis. Average Angstrom's turbidity coefficient beta = 0.017 +/- 0.006, wavelength exponent alpha = 1.6 +/- 0.2, aerosol optical depth at 0.5 micron D(0.5) = 0.05 +/- 0.001, and mean precipitable water w = 0.2 +/- 0.1 cm were determined, matching the regional pattern known until now. Monthly, as well as daily, variations of observed atmospheric turbidity are discussed with respect to prevailing winds, synoptic patterns, and topography, revealing lowest turbidity for southwesterly flow. A review on 30 years of compatible aerosol optical thickness measurements at Antarctic coastal stations is added. 36 refs.
- OSTI ID:
- 6896248
- Journal Information:
- Journal of Applied Meteorology; (United States), Journal Name: Journal of Applied Meteorology; (United States) Vol. 31:10; ISSN JOAMEZ; ISSN 0894-8763
- Country of Publication:
- United States
- Language:
- English
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