Øyvind Nordli

TL;DR: The Twentieth Century Reanalysis (20CR) dataset as discussed by the authors provides the first estimates of global tropospheric variability, and of the dataset's time-varying quality, from 1871 to the present at 6-hourly temporal and 2° spatial resolutions.

TL;DR: In this article, the authors used an enormous systematic phenological network data set of more than 125 000 observational series of 542 plant and 19 animal species in 21 European countries (1971-2000) and concluded that previously published results of phenological changes were not biased by reporting or publication predisposition.

TL;DR: In this article, the Svalbard Airport composite series was extended to 1898 with the inclusion of observations made by hunting and scientific expeditions, which revealed large temperature variability on Spitsbergen, with an abrupt change from the cold 1910s to the local maxima of the 1930s and 1950s.

TL;DR: In this paper, the development of a daily historical European-North Atlantic mean sea level pressure dataset (EMSLP) for 1850-2003 on a 5° latitude by longitude grid is described.

TL;DR: In this paper, the authors attributed the recent warming to variations in large-scale atmospheric circulation (AC), air mass characteristics, and sea ice concentration (SIC), both regionally around Spitsbergen and locally in three fjords.