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
| Autor: | Peyman Zawar-Reza, Daniel C. Laughlin, Marwan Katurji, Glen Stichbury, Lars Brabyn, S. Craig Cary, Bryan C. Storey |
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| Rok vydání: | 2013 |
| Předmět: |
Hydrology
Land surface temperature media_common.quotation_subject Temperature Microclimate Antarctic Regions General Medicine Vegetation Management Monitoring Policy and Law Atmospheric sciences Snow Pollution Weather station Sky Latent heat Remote Sensing Technology Environmental science Spacecraft Transect Environmental Monitoring General Environmental Science media_common |
| Zdroj: | Environmental Monitoring and Assessment. 186:2619-2628 |
| ISSN: | 1573-2959 0167-6369 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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