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Wild, M.* ; Behm, S.* ; Beck, C.* ; Cyrys, J. ; Schneider, A.E. ; Wolf, K. ; Haupt, H.*

Mapping the time-varying spatial heterogeneity of temperature processes over the urban landscape of Augsburg, Germany.

Urban Climate 43:101160 (2022)
DOI
Open Access Green as soon as Postprint is submitted to ZB.
Generating high-resolution spatial interpolations of temperature processes is a vital task for studying urban climate anomalies and their various consequences. Such processes often constitute a complex and demanding data environment: Anthropogenic and natural conditions of the urban landscape result in anisotropic spatial dependencies and trend patterns that often vary in diurnal and seasonal cycles. Two-step geostatistical methods such as residual kriging take spatial heterogeneity into account but ignore the temporal dimension, which can result in a significant loss of potentially useful information. In this study, we propose nonparametric spatial detrending to obtain a process that fulfills the assumptions of ordinary kriging. In our application to urban air temperature series from monitoring sites distributed over the urban and suburban area of Augsburg, Germany, we provide an in-depth analysis of time-varying spatial heterogeneity. By using sub-sampling to account for diurnal, seasonal, and spatial trends, we produce interpolation maps with a resolution of 100 m × 100 m. The validation in a narrower sense is based on cross-validation and shows favorable behavior of the proposed method even when sub-samples are neglected. The broader sense validation is based on hold-out monitoring sites and provides further empirical support for our proposal.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Kriging ; Nonparametric Regression ; Seasonal And Diurnal Cycles ; Spatial Trend Modelling ; Urban Air Temperature ; Urban Heat Island
ISSN (print) / ISBN 2212-0955
e-ISSN 2212-0955
Journal Urban Climate
Quellenangaben Volume: 43, Issue: , Pages: , Article Number: 101160 Supplement: ,
Publisher Elsevier
Publishing Place Amsterdam [u.a.]
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Epidemiology II (EPI2)
Grants Helmholtz Climate Initiative REKLIM