Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 496995
Title Global geographic and feature space coverage of temperature data in the context of spatio-temporal interpolation
Author(s) Kilibarda, Milan; Tadić, Melita Perčec; Hengl, Tom; Luković, Jelena; Bajat, Branislav
Source Spatial Statistics 14 (2015). - ISSN 2211-6753 - p. 22 - 38.
DOI https://doi.org/10.1016/j.spasta.2015.04.005
Department(s) ISRIC - World Soil Information
Publication type Refereed Article in a scientific journal
Publication year 2015
Keyword(s) Daily temperature interpolation - Global space-time kriging model - GSOD - MaxEnt - MODIS LST - Spatio-temporal analysis
Abstract

This article highlights the results of an assessment of representation and usability of global temperature station data for global spatio-temporal analysis. Datasets from the Global Surface Summary of Day (GSOD) and the European Climate Assessment & Dataset (ECA&D) were merged and consisted of 10,695 global stations for the year 2011. Three aspects of data quality were considered: (a) representation in the geographical domain, (b) representation in the feature space (based on the MaxEnt method), and (c) usability i.e. fitness of use for spatio-temporal interpolation based on cross-validation of spatio-temporal regression-kriging models. The results indicate significant clustering of meteorological stations in the combined data set in both geographical and feature space. The majority of the distribution of stations (84%) can be explained by population density and accessibility maps. Consequently, higher elevations areas and inaccessible areas that are sparsely populated are significantly under-represented. Under-representation also reflects on the results of spatio-temporal analysis. Spatio-temporal regression-kriging model of mean daily temperature using 8-day MODIS LST images, as covariate, produces average global accuracy of 2-3 °C. Prediction of temperature for polar areas and mountains is 2 times lower than for areas densely covered with meteorological stations. Balanced spatio-temporal regression models that account for station clustering are suggested.

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