Landsat and Local Land Surface Temperatures in a Heterogeneous Terrain Compared to MODIS Values
Departament de Física, Universitat de les Illes Balears, Cra. Valldemossa km. 7.5, Palma 07122, Spain
Departament de Física de la Terra i Termodinàmica, Universitat de València, València 46010, Spain
Author to whom correspondence should be addressed.
Academic Editors: Zhaoliang Li, Richard Müller and Prasad S. Thenkabail
Received: 9 August 2016 / Revised: 29 September 2016 / Accepted: 11 October 2016 / Published: 15 October 2016
Land Surface Temperature (LST) as provided by remote sensing onboard satellites is a key parameter for a number of applications in Earth System studies, such as numerical modelling or regional estimation of surface energy and water fluxes. In the case of Moderate Resolution Imaging Spectroradiometer (MODIS) onboard Terra or Aqua, pixels have resolutions near 1 km
, LST values being an average of the real subpixel variability of LST, which can be significant for heterogeneous terrain. Here, we use Landsat 7 LST decametre-scale fields to evaluate the temporal and spatial variability at the kilometre scale and compare the resulting average values to those provided by MODIS for the same observation time, for the very heterogeneous Campus of the University of the Balearic Islands (Mallorca, Western Mediterranean), with an area of about 1 km
, for a period between 2014 and 2016. Variations of LST between 10 and 20 K are often found at the sub-kilometre scale. In addition, MODIS values are compared to the ground truth for one point in the Campus, as obtained from a four-component net radiometer, and a bias of 3.2 K was found in addition to a Root Mean Square Error (RMSE) of 4.2 K. An indication of a more elaborated local measurement strategy in the Campus is given, using an array of radiometers distributed in the area.
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Simó, G.; García-Santos, V.; Jiménez, M.A.; Martínez-Villagrasa, D.; Picos, R.; Caselles, V.; Cuxart, J. Landsat and Local Land Surface Temperatures in a Heterogeneous Terrain Compared to MODIS Values. Remote Sens. 2016, 8, 849.
Simó G, García-Santos V, Jiménez MA, Martínez-Villagrasa D, Picos R, Caselles V, Cuxart J. Landsat and Local Land Surface Temperatures in a Heterogeneous Terrain Compared to MODIS Values. Remote Sensing. 2016; 8(10):849.
Simó, Gemma; García-Santos, Vicente; Jiménez, Maria A.; Martínez-Villagrasa, Daniel; Picos, Rodrigo; Caselles, Vicente; Cuxart, Joan. 2016. "Landsat and Local Land Surface Temperatures in a Heterogeneous Terrain Compared to MODIS Values." Remote Sens. 8, no. 10: 849.
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