edu.ucar.opensky::articles:16647 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T03:11:53.123680 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7mc917g Northern Hemisphere climate variability during winter: Looking back on the work of Felix Exner 2015-03-01T00:00:00Z publication https://n2t.org/ark:/85065/d7mc917g https://doi.org/10.1127/metz/2015/0578 Hurrell, James W. author Deser, Clara author UCAR/NCAR - Library publisher We present a brief commentary on the landmark study of Exner (1913), in which an analysis of the correlation between monthly anomalies of "polar pressure" and sea level pressure from numerous stations around the Northern Hemisphere during winter was presented. Exner's analysis still stands today as an excellent description of the spatial structure of the leading pattern of atmospheric variability over the extratropical Northern Hemisphere (NH); namely, the North Atlantic Oscillation (NAO). Moreover, Exner provided an accurate commentary on regional changes in surface air temperature driven by NAO variability. His quantitative analysis of these aspects represented a major step forward in the history of research on NH climate variability that, prior to his study, was primarily qualitative. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2015 Authors. None eng geoscientificInformation