Tussock Tundra Albedos on the North Slope of Alaska: Effects of Illumination, Vegetation Composition, and Dust Deposition

Autor:	Edward Aguado, Allen Hope, Douglas A. Stow, Jeffrey B. Fleming
Rok vydání:	1991
Předmět:	Atmospheric Science Deposition (aerosol physics) Meteorology Tussock tundra Environmental science Sampling (statistics) Classification scheme Vegetation composition Albedo Atmospheric sciences complex mixtures Vegetation cover
Zdroj:	Journal of Applied Meteorology. 30:1200-1206
ISSN:	1520-0450 0894-8763
DOI:	10.1175/1520-0450(1991)030<1200:ttaotn>2.0.co;2
Popis:	The albedo of tussock tundra was measured at two sites on the north slope of Alaska. One site was selected because of its apparent uniformity and undisturbed condition, while the other site had been visibly affected by dust deposition from the Dalton Highway. Albedo measurements were made under varying cloud-cover conditions. It was hypothesized that observed variations in albedo at the undisturbed site were caused by variations in illumination conditions and ventilation cover type. A simple cloud index (CI) was used to characterize the cloud-cover-illumination conditions, and vegetation cover was described using a hierarchical classification scheme and point-guadrat sampling. Albedo at the undisturbed site was found to be related significantly to variations in CI but unaffected by differences in vegetation cover type. The final component of the study compared the albedo-CI relationships at the undisturbed and dust-impacted sites. It was concluded that dust deposition had a significant direct and...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9ebb5607e162e8dc5ad106c035d1307e https://doi.org/10.1175/1520-0450(1991)030<1200:ttaotn>2.0.co Zobrazit plný text záznamu