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The paper discusses the possibilities for the retrieval of the screen air temperature (Ta) using NOAA advanced very high resolution radiometry (AVHRR) surface skin temperatures (Ts) and information on altitude, slope, aspect and landcover. The method used is a stepwise multiple regression analysis. Results demonstrate the change in significance of each variable as a function of the time scale of the analysis. While time-invariant variables such as the altitude, slope and aspect are more significant on a daily basis, the time dependent variables such as Ts and the normalized difference vegetation index (NDVI) are more important on longer time scales. Future research should concentrate on the combination of information from both domains through advanced modelling tools.

Additional information

Authors: PAQUET F, Université Laval, Centre de Recherche en géomatique, Ste-Foy (CA);VIAU A A, Université Laval, Centre de Recherche en géomatique, Ste-Foy (CA);VOGT J V, JRC Ispra (IT)
Bibliographic Reference: Paper presented: International Symposium 'Geomatics in the Era of Radarsat' (GER'97), Ottawa (CA), May 24-30, 1997
Availability: Available from (1) as Paper EN 40602 ORA
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