North Atlantic Oscillation Dynamics Recorded in Greenland Ice Cores

Appenzeller, Christof; Stocker, T. F.; Anklin, Martin

doi:10.1126/science.282.5388.446

Cited by 318 publications

(232 citation statements)

References 26 publications

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“…In particular, the influence of the North Atlantic Oscillation (NAO) on the snow accumulation on the GrIS was used to reconstruct a NAO-index (NAOI) beyond the instrumental period [Appenzeller et al, 1998a[Appenzeller et al, , 1998b. The accumulation rates from the NASAU ice core (73.84°N, 49.49°W) in NorthWestern Greenland, for instance, revealed a significant correlation (r = À0.57) with the instrumental NAOI.…”

Section: Introductionmentioning

confidence: 99%

Reconstructing climate variability from Greenland ice sheet accumulation: An ERA40 study

Hutterli

Raible

Stocker

2005

Geophysical Research Letters

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Re‐analysis data covering the period 1958–2001 are used to investigate the relationship between regional, inter‐annual snow accumulation variability over the Greenland Ice Sheet (GrIS) and large scale circulation patterns, cyclone frequency, and strength. Four regions of the GrIS have been identified that are highly independent with respect to accumulation variability. Accumulation indices of three of these regions are associated with distinct large‐scale circulation patterns: Central‐western GrIS reveals an inverse relationship with a NAO‐like pattern, the south‐west a positive correlation with a high pressure bridge from central North Atlantic to Scandinavia, and the south‐eastern GrIS a positive correlation with a high‐pressure anomaly over the Greenland Sea. These large‐scale patterns also impact European climate in different ways. Accumulation variability in north‐eastern GrIS, however, is dominated by cyclones originating from the Greenland Sea. Thus, Greenland ice core accumulation records offer the potential to reconstruct various large‐scale circulation patterns and regional storm activity.

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Section: Introductionmentioning

confidence: 99%

Reconstructing climate variability from Greenland ice sheet accumulation: An ERA40 study

Hutterli

Raible

Stocker

2005

Geophysical Research Letters

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“…Different approaches to a NAOI reconstruction have been established (Cook et al 1998Appenzeller et al 1998;Luterbacher et al 1999;LUT;Garcia et al 2000;Cullen et al 2000;Proctor et al 2000;Glueck and Stockton 2001;Rodrigo et al 2001;Vinther et al 2003). However, Schmutz et al (2000) raised some doubts about the reliability of many of the reconstructions that were based on natural proxies.…”

Section: Introductionmentioning

confidence: 99%

Scale-Dependent Reconstruction of the NAO Index

Timm¹,

Ruprecht²,

Kleppek³

2004

J. Climate

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A method is presented to reconstruct decadal variations of the North Atlantic Oscillation (NAO). The spectral characteristics of the NAO on time scales of decades and longer are of particular interest for the understanding of North Atlantic ocean-atmosphere interactions. The reconstruction is based on a transfer model calibration that uses bandpass-filtered time series. The maximum overlap discrete wavelet transform (MODWT) is applied for decomposing the time series variance into different time scales. A total of 43 proxies, including Greenland ice cores and European tree-ring chronologies, are selected and regionally grouped providing four independent reconstructions for the period 1700-1978. The mean reconstruction agrees well with two recently published reconstructions during most of the time period. However, there are considerable differences in the earliest part before 1750. Running correlations between the reconstructions indicate that time-dependent relations exist among the different NAO reconstructions. The results suggest that the geographical distribution of proxies strongly affects the reconstruction and could explain some of the apparent discrepancies among the reconstructions recently published in literature. In the early eighteenth century, external forcing (solar, volcanic) seems to mask the NAO signature within the proxies.

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“…Les études sur l'ONA (Appenzeller, 1998) tendent à montrer que lors des phases actives, les périodicités sont dans les hautes fréquences (5-15 ans) alors qu'en phase passive c'est uniquement la basse fréquence qui apparaît (40-50 ans). La périodicité de 7-8 ans (ici 7,3 ans) en particulier a fait l'objet d'une attention toute particulière des météorologistes quant à ses liens avec l'ONA (Da Costa et al, 2002 ;Simonnet, sous presse).…”

Section: -Essai D'interprétation Chrono-climatique Du Travertinunclassified

Recherche et interprétation climatique des microcycles du concrétionnement travertineux de l'aqueduc romain de Fréjus (Var, France)

Dubar

2006

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North Atlantic Oscillation Dynamics Recorded in Greenland Ice Cores

Cited by 318 publications

References 26 publications

Reconstructing climate variability from Greenland ice sheet accumulation: An ERA40 study

Reconstructing climate variability from Greenland ice sheet accumulation: An ERA40 study

Scale-Dependent Reconstruction of the NAO Index

Recherche et interprétation climatique des microcycles du concrétionnement travertineux de l'aqueduc romain de Fréjus (Var, France)

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