Reconstruction of monthly NAO and EU indices back to AD 1675

Luterbacher, Jürg; Schmutz, Christoph; Gyalistras, Dimitrios; Xoplaki, Elena; Wanner, Heinz

doi:10.1029/1999gl900576

Cited by 258 publications

(239 citation statements)

References 17 publications

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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%

“…All of these reconstructions have in common the unfiltered time series that have been used to calibrate and validate their statistical transfer models and to reconstruct the NAO signal from the proxies. These models provide ''best'' estimates for individual annual (winter) or even monthly index values (Luterbacher et al 1999;LUT). The spectral characteristics of the reconstructed time series are estimated after the reconstruction procedure.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Scale-Dependent Reconstruction of the NAO Index

Timm¹,

Ruprecht²,

Kleppek³

2004

J. Climate

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“…Plains and steppe vegetation occupy the north, where temperate air masses originate from eastern Europe. The North Atlantic Oscillation [Cullen and deMenocal, 2000] and East AtlanticWestern Russia teleconnection pattern [Barnston and Livezey, 1987;Luterbacher et al, 1999] are known to impact climate in this general region. Occurrence of frequent drought in Ukraine may involve intrusion of cold air masses from the north or west and formation of large anticyclones behind these fronts, which can create dry, hot conditions (P. Kovalenko et al, unpublished report, available at http://iranrivers.com/electronic_library/paper/ drought/50DOC.pdf).…”

Section: Introductionmentioning

confidence: 99%

Tree‐ring reconstruction of Crimean drought and lake chronology correction

Solomina

Davi

D’Arrigo

et al. 2005

Geophysical Research Letters

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The first verifiable reconstruction of spring (April–July) precipitation is presented for Crimea, Ukraine. It is derived from Crimean pine (Pinus hamata) ring‐width data spanning A.D. 1620–2002. The reconstruction accounts for 37% of the variance in observed precipitation over 1896–1988. Most droughts recorded in Crimean historical documents in the 17th–19th centuries coincide with below‐average reconstructed precipitation in the concurrent or following year. An 11‐year filtered version of the reconstruction correlates with an annually‐laminated sediment‐thickness record from Saki Lake (4188 years in length), once this record is shifted backward by 15 years. The offset may be explained by anthropogenic changes at the lake in the late 19th century. The significant relationship between the lake sediments and reconstruction suggests that the lake record is also a moisture indicator. If so, the wettest period of the past 1500 years (∼AD1050–1250) broadly coincides with the “Medieval Warm Period” (MWP) in Crimea.

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“…Cornes et al, 2013;Hurrell and van Loon, 1997;Jones et al, 1997;and Luterbacher et al, 1999). We therefore first explore the relationship between the NAO and sea level in instrumental records, and then test the hypothesis that the periods of rapid sea-level rise in our Icelandic salt-marsh proxy record are synchronous with reconstructed changes in NAO.…”

Section: West Icelandic Sea Level and Naomentioning

confidence: 99%