Representation of European hydroclimatic patterns with Self-Organizing Maps

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Authors

Yannis Markonis , Filip Strnad

Abstract

Self-Organizing Maps provide a powerful, non-linear technique of dimensionality reduction that can be used to identify clusters with similar attributes. Here, they were constructed from a 1000-year-long gridded palaeoclimatic dataset, namely the Old World Drought Atlas, to detect regions of homogeneous hydroclimatic variability across the European continent. A classification scheme of 10 regions was found to describe most efficiently the spatial properties of Europes hydroclimate. These regions were mainly divided into a northern and a southern subset, linked together with a northwest-to-southeast orientation. Further analysis of the classification scheme with complex networks confirmed the divergence between the northern and southern components of European hydroclimate, also revealing that is not strongly correlated to the Iberian peninsula. On the contrary, the region covering British Isles, France and Germany, appeared to be linked to both branches, implying links of hydroclimate with atmospheric/oceanic circulation.

DOI

https://doi.org/10.31223/osf.io/g28d6

Subjects

Climate, Earth Sciences, Environmental Sciences, Hydrology, Life Sciences, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics, Physics, Planetary Sciences

Keywords

geostatistics, drought, Classi?cation, Hydroclimatic variability, Regional analysis, Self-Organizing Maps

Dates

Published: 2019-05-14 23:55

Last Updated: 2020-01-27 14:31

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License

GNU Lesser General Public License (LGPL) 2.1

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