Björklund, J., & von Arx, G. (2023). Wood-anatomy data refine the record of climate in Northern Europe. Nature, 620, 97-103. https://doi.org/10.1038/d41586-023-02010-z
Reconstructions of past temperatures often portray the extended warm period known as the Medieval Climate Anomaly (ad 950–1250) as warmer than the current period. However, a set of wood-anatomy measurements from tree rings shows that the North European climate is much warmer today than it was during that time, underscoring the role of anthropogenic climate change in the region’s temperature variability.