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Titolo:
The n-factor in natural landscaper: Variability of air and soil-surface temperatures, Kuparuk River basin, Alaska, USA
Autore:
Klene, AE; Nelson, FE; Shiklomanov, NI; Hinkel, KM;
Indirizzi:
Univ Delaware, Dept Geog, Newark, DE 19716 USA Univ Delaware Newark DE USA 19716 laware, Dept Geog, Newark, DE 19716 USA Univ Delaware, Ctr Climat Res, Newark, DE 19716 USA Univ Delaware Newark DE USA 19716 e, Ctr Climat Res, Newark, DE 19716 USA Univ Cincinnati, Dept Geog, Cincinnati, OH 45221 USA Univ Cincinnati Cincinnati OH USA 45221 pt Geog, Cincinnati, OH 45221 USA
Titolo Testata:
ARCTIC ANTARCTIC AND ALPINE RESEARCH
fascicolo: 2, volume: 33, anno: 2001,
pagine: 140 - 148
SICI:
1523-0430(200105)33:2<140:TNINLV>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACTIVE-LAYER THICKNESS; NORTH-CENTRAL ALASKA; ARCTIC ALASKA; TUNDRA; THAW; FLUX; MOISTURE; BALANCE; CANADA; ENERGY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
57
Recensione:
Indirizzi per estratti:
Indirizzo: Klene, AE Univ Delaware, Dept Geog, Newark, DE 19716 USA Univ Delaware Newark DE USA 19716 pt Geog, Newark, DE 19716 USA
Citazione:
A.E. Klene et al., "The n-factor in natural landscaper: Variability of air and soil-surface temperatures, Kuparuk River basin, Alaska, USA", ARCT ANTARC, 33(2), 2001, pp. 140-148

Abstract

The n-factor, or ratio of the seasonal degree-day sum at the soil surface to that in the air at standard screen height, has been used for more than 40 yr in engineering studies to parameterize the temperature regime at the ground surface. Conceptually, this index represents the complex energy balance at the surface as a single dimensionless number and has applications in ecology, climatology, and geocryology. Although the n-factor has been used theoretically to represent the thermal regime of undisturbed natural surfaces, lack of empirical data has hindered its widespread implementation. Nineground and one air temperature series (1995-97) from each of ten 1-ha plots on the coastal plain and Brooks Range foothills of north-central Alaska were converted to thawing (summer) n-factors and analyzed to address within-and between-plot spatial and temporal variability. Although substantial microscale variation exists, n-factors corresponding to natural vegetation/soil classes are discernable. Incorporation of n-factor values in a standard solution for the depth of thaw resulted in significantly improved estimatesof active-layer thickness throughout the study area. The n-factor has considerable potential for addressing problems involving near-surface climate dynamics over extensive regions and long time periods.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 18:08:13