2006
DOI: 10.1126/science.1127213
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Surface and Deep Ocean Interactions During the Cold Climate Event 8200 Years Ago

Abstract: Evidence from a North Atlantic deep-sea sediment core reveals that the largest climatic perturbation in our present interglacial, the 8200-year event, is marked by two distinct cooling events in the subpolar North Atlantic at 8490 and 8290 years ago. An associated reduction in deep flow speed provides evidence of a significant change to a major downwelling limb of the Atlantic meridional overturning circulation. The existence of a distinct surface freshening signal during these events strongly suggests that th… Show more

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Cited by 298 publications
(307 citation statements)
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“…The remaining part of the reconstruction method follows Rohling et al (2014) instance the chronology for MD99-2251 contains only two ages within the critical time interval compared to the nine in MD03-2665 and that the age offset reflects the limitations of the Ellison et al (2006) 321 chronology.…”
mentioning
confidence: 99%
“…The remaining part of the reconstruction method follows Rohling et al (2014) instance the chronology for MD99-2251 contains only two ages within the critical time interval compared to the nine in MD03-2665 and that the age offset reflects the limitations of the Ellison et al (2006) 321 chronology.…”
mentioning
confidence: 99%
“…We thank an anonymous reviewer for helpful comments on the manuscript. The research was funded by the Deutsche Forschungsgemeinschaft INTERDYNAMIC DFG-Schwerpunktprogramm 1266 to AB, AP, DH, SM, CR and MS and NSF OCE0902977 to YR. [Ellison et al, 2006] illustrate the link between atmospheric and oceanic response to solar variability and background melting.…”
Section: Discussionmentioning
confidence: 99%
“…The abrupt temperature and salinity decreases in our record suggest that melt-waters from the lake drainage rapidly reached ENACW formation sites and thereby further weakened the upper limb of the AMOC. Separated from the first event by a partial recovery of ∼200-300 years, the second event at 8.17 to 8.31 ka is concurrent with the maximum cooling observed in the d 18 O GISP2 ice core record as well as with the maximum slowdown of LNADW formation associated with the 8.2 ka event [Ellison et al, 2006;Kleiven et al, 2008] (Figure 3). Further, the combined temperature and salinity values suggest that ENACW density tended towards lighter density surfaces during both 150-year-long events, with lightest values centered at 8.24 and 8.52 ka ( Figure S4).…”
Section: Early Holocene Coolingmentioning
confidence: 99%
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“…However, in the dataset of Ellison et al (2006), there is a first cool spike centred on about 8490 calBP (spanning roughly 8550-8450 calBP), followed by a more distinct cool event that spans the interval 8380-8260 calBP. The latter immediately pre-dates (without overlap) a rapid reduction to lowest ISOW flow intensity, which spans the interval 8260-8050 calBP (see Figure 3 of Ellison et al 2006). The data of Ellison et al (2006) therefore pose some challenging questions: (1) Why did it take some two centuries after the main flooding event before ISOW flow was minimised, when models suggest there should be an almost instantaneous response?…”
Section: The North Atlantic Recordmentioning
confidence: 99%