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The North Atlantic Oscillation: variability and interactions with the North Atlantic ocean and Artic sea ice

Abstract

The North Atlantic oscillation (NAO) represents the dominant mode of atmospheric variability in the North Atlantic region and describes the strengthening and weakening of the midlatitude westerlies. In this study, variability of the NAO during wintertime and its relationship to the North Atlantic ocean and Arctic sea ice is investigated. For this purpose, observational data are analyzed along with integrations of models for the Atlantic ocean, Arctic sea ice, and the coupled global climate system. From a statistical point of view, the observed NAO index shows unusually high variance on interdecadal time scales during the 20th century. Variability on other time scales is consistent with realizations of random processes (''white noise''). Recurrence of wintertime NAO anomalies from winter-to-winter with missing signals during the inbetween nonwinter seasons is primarily associated with interdecadal variability of the NAO. This recurrence indicates that low-frequency changes of the NAO during the 20th century were in part externally forced. (orig.)
Authors:
Publication Date:
Jul 01, 2000
Product Type:
Thesis/Dissertation
Report Number:
ETDE-DE-920
Reference Number:
EDB-01:029681
Resource Relation:
Other Information: TH: Diss.; 142 refs.; PBD: 2000; Related Information: Berichte aus dem Institut fuer Meereskunde an der Christian-Albrechts-Universitaet Kielv. 315
Subject:
54 ENVIRONMENTAL SCIENCES; ATLANTIC OCEAN; NORTHERN HEMISPHERE; OSCILLATIONS; TIME-SERIES ANALYSIS; ATMOSPHERIC PRESSURE; OCEANIC CIRCULATION; AIR-WATER INTERACTIONS; TEMPERATURE DISTRIBUTION
OSTI ID:
20118942
Research Organizations:
Institut fuer Meereskunde an der Univ. Kiel (Germany); Kiel Univ. (Germany). Mathematisch-Naturwissenschaftliche Fakultaet
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Other: ISSN 0341-8561; TRN: DE00GF434
Availability:
Available to ETDE participating countries only(see www.etde.org); commercial reproduction prohibited; OSTI as DE20118942
Submitting Site:
DE
Size:
128 pages
Announcement Date:

Citation Formats

Jung, T. The North Atlantic Oscillation: variability and interactions with the North Atlantic ocean and Artic sea ice. Germany: N. p., 2000. Web.
Jung, T. The North Atlantic Oscillation: variability and interactions with the North Atlantic ocean and Artic sea ice. Germany.
Jung, T. 2000. "The North Atlantic Oscillation: variability and interactions with the North Atlantic ocean and Artic sea ice." Germany.
@misc{etde_20118942,
title = {The North Atlantic Oscillation: variability and interactions with the North Atlantic ocean and Artic sea ice}
author = {Jung, T}
abstractNote = {The North Atlantic oscillation (NAO) represents the dominant mode of atmospheric variability in the North Atlantic region and describes the strengthening and weakening of the midlatitude westerlies. In this study, variability of the NAO during wintertime and its relationship to the North Atlantic ocean and Arctic sea ice is investigated. For this purpose, observational data are analyzed along with integrations of models for the Atlantic ocean, Arctic sea ice, and the coupled global climate system. From a statistical point of view, the observed NAO index shows unusually high variance on interdecadal time scales during the 20th century. Variability on other time scales is consistent with realizations of random processes (''white noise''). Recurrence of wintertime NAO anomalies from winter-to-winter with missing signals during the inbetween nonwinter seasons is primarily associated with interdecadal variability of the NAO. This recurrence indicates that low-frequency changes of the NAO during the 20th century were in part externally forced. (orig.)}
place = {Germany}
year = {2000}
month = {Jul}
}