title: Accuracy assessment of land surface temperature retrievals from Landsat 7 ETM + in the Dry Valleys of Antarctica using iButton temperature loggers and weather station data.
abstract: The McMurdo Dry Valleys of Antarctica are the largest snow/ice-free regions on this vast continent, comprising 1% of the land mass. Due to harsh environmental conditions, the valleys are bereft of any vegetation. Land surface temperature is a key determinate of microclimate and a driver for sensible and latent heat fluxes of the surface. The Dry Valleys have been the focus of ecological studies as they arguably provide the simplest trophic structure suitable for modelling. In this paper, we employ a validation method for land surface temperatures obtained from Landsat 7 ETM + imagery and compared with in situ land surface temperature data collected from four transects totalling 45 iButtons. A single meteorological station was used to obtain a better understanding of daily and seasonal cycles in land surface temperatures. Results show a good agreement between the iButton and the Landsat 7 ETM + product for clear sky cases. We conclude that Landsat 7 ETM + derived land surface temperatures can be used at broad spatial scales for ecological and meteorological research.
authors.affiliation: Geography, Tourism and Environmental Planning, University of Waikato, Hamilton, New Zealand, larsb@waikato.ac.nz.
authors.forename: Lars
authors.initials: L
authors.lastname: Brabyn
authors.forename: Peyman
authors.initials: P
authors.lastname: Zawar-Reza
authors.forename: Glen
authors.initials: G
authors.lastname: Stichbury
authors.forename: Craig
authors.initials: C
authors.lastname: Cary
authors.forename: Bryan
authors.initials: B
authors.lastname: Storey
authors.forename: Daniel C
authors.initials: DC
authors.lastname: Laughlin
authors.forename: Marwan
authors.initials: M
authors.lastname: Katurji
mesh_terms: D000864:Antarctic Regions; D004784:Environmental Monitoring / Q000379:methods*; D058998:Remote Sensing Technology / Q000379:methods; D018531:Spacecraft; D013696:Temperature