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Cristin-resultat-ID:
1355766
Sist endret:
27. oktober 2016, 14:05
Resultat
Vitenskapelig foredrag
2004
Temporal linkages between the Faro-Shetland time series and the Kola section time series.
Harald Yndestad
Presentasjon
Presentasjon
Navn på arrangementet: 2004 ICES Annual Science conference. Theme Session M. Regime Shifts in the North Atlantic Ocean: Coherent or Chaotic?
Sted: Vigo
Dato fra:
9. september 2004
Dato til:
22. september 2004
Arrangør:
Arrangørnavn: International Council for the Exploration of the Sea
Om resultatet
Om resultatet
Vitenskapelig foredrag
Publiseringsår: 2004
Klassifisering
Klassifisering
Vitenskapsdisipliner
Matematikk og naturvitenskap
Emneord
Dynamisk oseanografi
Beskrivelse
Beskrivelse
Engelsk
Tittel
Temporal linkages between the Faro-Shetland time series and the Kola section time series.
Sammendrag
The Faroe-Shetland time series and the Kola time series cover a time period of more than hundred years and represent two of the longest oceanographic time series in the world. The relationship between these important time series is examined in this paper, which presents for the first time comparisons between the annual mean sea level and the temperature and salinity of Atlantic Water in the Faroe-Shetland Channel and the Kola section in the Barents Sea. The investigation is based on a wavelet spectrum analysis used to identify the dominant cycle periods and cycle phases in all time series. The identified cycles are compared to dominant cycles in sea level time series from Aberdeen and Hammerfest. The investigation has identified a correlation better than R=0.8 between dominant temperature cycles and the 18.6 year lunar nodal tide in most time series. The paper presents the correlations to the lunar nodal tide, the phase relationships between the dominant cycles and the signal to noise ratio between the dominant cycles and other unknown sources. The identified 18 year cycles seem to have a temporary stationary cycle time and a time variant phase. The dominant 18 year temperature and salinity time series in the Faroe-Shetland Channel and the Kola section had a phase-reversal that started in about 1920-25. A cycle phase-reversal may be explained by an amplitude modulation between the 18 year cycle and a more low frequent cycle.
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fullstendig beskrivelse
Bidragsytere
Bidragsytere
Harald Yndestad
Forfatter
ved Institutt for IKT og realfag ved Norges teknisk-naturvitenskapelige universitet
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