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Winter-responding proxy temperature reconstructions and the North Atlantic Oscillation

Journal Article · · Journal of Geophysical Research. Atmospheres
DOI:https://doi.org/10.1002/2014jd021561· OSTI ID:1150059
 [1];  [2];  [3]
  1. Climatic Research Unit, School of Environmental Sciences University of East Anglia Norwich UK; Center of Excellence for Climate Change Research, Department of Meteorology King Abdulaziz University Jeddah Saudi Arabia; University of East Anglia
  2. Climatic Research Unit, School of Environmental Sciences University of East Anglia Norwich UK
  3. Centre for Ice and Climate, Niels Bohr Institute University of Copenhagen Copenhagen Denmark
+ Show Author Affiliations
Instrumental temperature data for the Northern Hemisphere (30°–90°N) clearly indicate that winter season variability is larger than equivalent measures for summer. This should not be surprising as temperatures in winter are dominated by variability caused by changes in atmospheric circulation features, whereas in summer variability is more dominated by local changes in cloudiness. Here we consider most of the few winter-responding annually resolved proxy reconstructions of temperature from the northern North Atlantic and northwestern European regions. We find the expected out-of-phase relationship between northwest Europe and Greenland due to the North Atlantic Oscillation (NAO), which is stronger when the series from the two locations are formed from more than one series. On 3 year time scales this relationship between the two locations shows no century-scale variations since 1250 CE (Common Era), the start of our reconstructions, in contrast to the strong positive NAO values before 1400 CE implied by the study of Trouet et al. (2009).
Research Organization:
Univ. of East Anglia, Norwich (United Kingdom)
Sponsoring Organization:
USDOE
DOE Contract Number:
SC0005689
OSTI ID:
1150059
Report Number(s):
DOE/SC0005689--Paper-8
Journal Information:
Journal of Geophysical Research. Atmospheres, Journal Name: Journal of Geophysical Research. Atmospheres Journal Issue: 11 Vol. 119; ISSN 2169-897X
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English

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