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  • 2000-2004  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    The North Atlantic Oscillation (2000)
    Springer
    Stochastic environmental research and risk assessment 14 (2000), S. 213-242 
    Details
    ISSN: 1436-3259
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract.  The North Atlantic Oscillation (NAO) is the most important mode of variability in the northern hemisphere (NH) atmospheric circulation. Put simply, the NAO measures the strength of the westerly winds blowing across the North Atlantic Ocean between 40°N and 60°N. The NAO is not a regional, North Atlantic phenomenon, however, but rather is hemispheric in extent. Based on 60 years of data from 1935 to 1995, Hurrell (1996) estimates that the NAO accounts for 31% of the variance in hemispheric winter surface air temperature north of 20°N. The present article provides an overview of the NAO, its role in the atmospheric circulation, its close relationship to the Arctic Oscillation of Thompson and Wallace (1998), and its influence on the underlying North Atlantic Ocean. Some discussion is also given on the dynamics of the NAO, the possible role of ocean surface temperature, and recent evidence that the stratosphere plays an important role in modulating the NAO.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004770000047
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    Paper (German National Licenses)
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  • 2
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    Prospects for decadal prediction of the North Atlantic Oscillation (NAO) (2002)
    AGU (American Geophysical Union)
    In:  Geophysical Research Letters, 29 (10). p. 1466.
    Details
    Publication Date: 2018-02-19
    Description: For certain, but realizable, states of the thermohaline and wind driven circulation of the North Atlantic Ocean, we demonstrate the possibility of making statements regarding the likely range of values to be taken by the annual average of the NAO-index on time scales out to a decade. Given that the North Atlantic is currently in such a predictable state, a simple surrogate model yields a prediction that the NAO index is more likely to be positive than negative for the next couple of years, followed by several years in which the NAO index is more likely to be negative.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1029/2001GL014069
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    Impact of an adiabatic correction technique on the simulation of CFC-12 in a model of the North Atlantic Ocean (2004)
    AGU (American Geophysical Union)
    In:  Geophysical Research Letters, 31 .
    Details
    Publication Date: 2018-03-21
    Description: A model of the North Atlantic Ocean is used to simulate the spreading of CFC‐12 from the Labrador Sea deep convection site. The standard version of the model fails to capture the local maximum in CFC‐12 concentration that is observed along the continental slope of the western boundary. Hydrographic data are used to apply a simple correction to the model's horizontal momentum equations. The corrected model is much more successful at capturing the nearslope maximum in CFC‐12 concentration than the uncorrected model and also exhibits a 50% increase of the deep southward export of CFC‐12 at 24°N. The difference between the two model runs is shown to be a consequence of the different paths taken by the Deep Western Boundary Current in the two model versions.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1029/2004GL020206
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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