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TitreConnecting the Atlantic-sector and the North Pacific (Mt Logan) ice core stable isotope records during the Holocene: the role of El Niño
AuteurFisher, D A
SourceThe Holocene vol. 21, issue 7, 2011 p. 1117-1124, https://doi.org/10.1177/0959683611400465
Année2011
Séries alt.Secteur des sciences de la Terre, Contribution externe 20090323
ÉditeurSAGE Publications
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1177/0959683611400465
Mediapapier; en ligne; numérique
Formatspdf
ProvinceYukon
SNRC115C/09
RégionMt Logan
Lat/Long OENS-140.4167 -140.4000 60.5833 60.5667
SujetsHolocène; océanographie; levés océanographiques; paléoclimatologie; glace; carottes; analyses de carottes de sondage; effets climatiques; climat; paléotempératures; La Nina; géologie des dépôts meubles/géomorphologie; Nature et environnement
Illustrationsgraphiques; graphiques; tableaux
ProgrammeGéosciences de changements climatiques, Gestionaire de programme - sciences de changements climatiques
Diffusé2011 07 18
Résumé(disponible en anglais seulement)
The d(18O) Holocene of the Mt Logan ice core is very different from those of eastern Arctic Canada and Greenland. The large changes seen in Logan dwarf even the largest change (the cooling event 8200 years ago) in the Atlantic-sector cores. Large changes in Logan's d(18O) and d are related to the state of El Niño as reflected by the Quelccaya d(18O) series. It is found that the lagged auto-difference series of the ice core records from the Agassiz ice cap, Greenland and the 23-site stack of paleotemperature records of Kaufman et al. (Kaufman DS, Schneider DP, McKay NP, Ammann CM, Bradley RS, Briffa KR et al. (2009) Recent warming reverses long-term Arctic cooling. Science 325: 1236) produce highly significant matches to the Mt Logan d(18O) series. These correspondences suggest a lag of 1200 years. This lag time is what some models of the Diffusive-Great Ocean Conveyor (D-GOC) predict for the average travel time from the North Atlantic to the tropical eastern Pacific. Monte Carlo testing of the correlations show that they are very significant. The implications of ENSO being affected by the difference between temperatures today and those of 1200 years ago are touched on.
GEOSCAN ID261385