Microclimate research gained renewed interest over the last decade and its importance for many ecological processes is increasingly being recognized. Consequently, the call for high-resolution microclimatic temperature grids across broad spatial extents is becoming more pressing to improve ecological models. Here, we provide a new set of open-access bioclimatic variables for microclimate temperatures of European forests at 25 × 25 m2 resolution.

Centre for Sustainable Ecosystem Solutions School of Biological Sciences University of Wollongong Wollongong Australia

CREAF Cerdanyola del Vallès 08193 Catalonia Spain

CSIC Global Ecology Unit CREAF CSIC UAB Bellaterra 08193 Catalonia Spain

Departamento de Biología y Geología Física y Química Inorgánica Universidad Rey Juan Carlos C Tulipán s n Móstoles 28933 Spain

Department of Earth and Environmental Sciences KU Leuven 3001 Leuven Celestijnenlaan 200E Belgium

Department of Ecology and Evolution University of Lausanne 1015 Lausanne Switzerland

Department of Ecology Environment and Plant Sciences and Bolin Centre for Climate Research Stockholm University 106 91 Stockholm Sweden

Department of Environmental Systems Science ETH Zurich Universitaetstrasse 2 8092 Zurich Switzerland

Department of Forest Botany Dendrology and Geobiocoenology Mendel University in Brno Brno Czech Republic

Department of Forestry and Wood Technology Linnaeus University Växjö 351 95 Sweden

Department of Geosciences and Geography University of Helsinki Gustaf Hällströmin katu 2a FIN 00014 Helsinki Finland

Department of Physical Geography and Bolin Centre for Climate Research Stockholm University 106 91 Stockholm Sweden

Environment and Sustainability Institute University of Exeter Penryn Campus Penryn TR10 9FE UK

European Commission Joint Research Centre Ispra Italy

Experimental Plant Ecology Institute of Botany and Landscape Ecology University of Greifswald D 17487 Greifswald Germany

Faculty of Ecology and Environmental Sciences Technical University in Zvolen T G Masaryka 24 960 01 Zvolen Slovakia

Faculty of Forestry and Wood Sciences Czech University of Life Sciences Prague Kamýcká 129 Prague 6 Suchdol CZ 165 21 Czech Republic

Faculty of Forestry Technical University in Zvolen T G Masaryka 24 960 01 Zvolen Slovakia

Faculty of Science and Technology Free University of Bolzano 39100 Bolzano Italy

Finnish Meteorological Institute P O Box 503 FI 00101 Helsinki Finland

Forest and Nature Lab Department of Environment Ghent University Geraardsbergsesteenweg 267 9090 Melle Gontrode Belgium

Forest Services Autonomous Province of Bolzano 39100 Bolzano Italy

Institute for Agriculture and Forestry Systems in the Mediterranean National Research Council of Italy Perugia Italy

Institute of Botany of the Czech Academy of Sciences Zámek 1 CZ 25243 Průhonice Czech Republic

Institute of Landscape Ecology University of Münster Münster Germany

KU Leuven Plant Institute KU Leuven Leuven Belgium

Musée et Jardins Botaniques Cantonaux 1007 Lausanne Switzerland

Plant Ecology Albrecht von Haller Institute for Plant Sciences Georg August University of Goettingen Untere Karspuele 2 37073 Goettingen Germany

Research Group PLECO University of Antwerp 2610 Wilrijk Belgium

Swiss Federal Institute for Forest Snow and Landscape Research WSL Birmensdorf Switzerland

UMR CNRS 7058 'Ecologie et Dynamique des Systèmes Anthropisés' Université de Picardie Jules Verne Amiens France

Wageningen University and Research Wageningen The Netherlands

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Patterns of tropical forest understory temperatures