Samuli Helama

TL;DR: Megadroughts reconstructed over north-central Europe in the 11th and mid-15th centuries reinforce other evidence from North America and Asia that droughts were more severe, extensive, and prolonged over Northern Hemisphere land areas before the 20th century, with an inadequate understanding of their causes.

TL;DR: Anchukaitis et al. as discussed by the authors presented the latest tree-ring-based NH land air temperature reconstruction from a temporal and spatial perspective, N-TREND2015 is relatively insensitive to the compositing method and spatial weighting used and validation metrics indicate that the new record portrays reasonable coherence with large scale summer temperatures and is robust at all time-scales from 918 to 2004 where at least 3 TR records exist from each major continental mass.

TL;DR: The Leverhulme Trust project as discussed by the authors proposed a method to study the effects of water pollution on the UK's marine environment using a water sampling method. But the method was not suitable for outdoor water harvesting.

TL;DR: In this paper, the authors compared tree-ring standardization methods along with the recently introduced approaches of regional curve standardization (RCS) and power-transformation (PT) and emphasized the difficulty in removing non-climatic variation (noise) while simultaneously preserving the low-frequency variability in the treering series.

TL;DR: Several late Quaternary studies have recorded cold and disturbed climates centred during the mid-first millennium AD and discussed these conditions under the term "Dark Ages Cold Period" (DACP).