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Improvement of satellite derived pollution maps with the use of a geostatistical interpolation method
Authors:PS Kanaroglou  NA Soulakellis  NI Sifakis
Institution:(1) University of the Aegean, Department of Geography, GR - 81100 Mytilini, Greece (e-mail: Kanaroglou@aegean.gr), GR;(2) National Observatory of Athens, Institute for Space Applications and Remote Sensing, Greece, GR
Abstract: The small number of ground stations for the assessment of the spatial distribution of air pollutants motivates the search for methods that make use of satellite images. One such method, known as Differential Texture Analysis (DTA), is used to measure the Aerosol Optical Thickness in the Visible (AOTV), which correlates highly with air quality. With this method, the presence of clouds and/or land cover changes produce patches of missing values. In this paper we demonstrate that universal kriging can be used to obtain reasonable estimates for these missing values. The methodology was applied to a satellite derived AOTV map of the city of Brescia (Italy). Received: 17 July 2001 / Accepted: 11 December 2001
Keywords::   Satellite  air pollution  kriging  image processing
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