Multi-archive summer temperature reconstruction for the European Alps, AD 1053–1996

Trachsel, Mathias; Kamenik, Christian; Grosjean, Martín; McCarroll, Danny; Moberg, Anders; Brázdil, Rudolf; Büntgen, Ulf; Dobrovolný, Petr; Esper, Jan; Frank, David; Friedrich, Michael; Glaser, Rüdiger; Larocque‐Tobler, Isabelle; Nicolussi, Kurt; Riemann, D.

doi:10.1016/j.quascirev.2012.04.021

Cited by 64 publications

(73 citation statements)

References 54 publications

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“…This confirms that the relative strength of the climate signal in the seven proxies remains constant through time. There are several ways in which the seven site chronologies can be combined to reconstruct the climate of the past (Trachsel et al, 2012;Briffa et al, 1988). We used weighted averaging, where the weight of each series is determined by the amount of variance in site chronologies, explained by sunshine.…”

Section: Transfer Function Developmentmentioning

confidence: 99%

Long-term summer sunshine/moisture stress reconstruction from tree-ring widths from Bosnia and Herzegovina

Poljanšek

Ceglar²,

Levanič

2013

Clim. Past

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Abstract. We present the first summer sunshine reconstruction from tree-ring data for the western part of the Balkan Peninsula. Summer sunshine is tightly connected with moisture stress in trees, because the moisture stress and therefore the width of annual tree-rings is under the influence of the direct and interactive effects of sunshine duration (temperature, precipitation, cloud cover and evapotranspiration). The reconstruction is based on a calibrated z-scored mean chronology, calculated from tree-ring width measurements from 7 representative black pine (Pinus nigra Arnold) sites in Bosnia and Herzegovina (BiH). A combined regression and scaling approach was used for the reconstruction of the summer sunshine. We found a significant negative correlation (r = −0.54, p < 0.0001) with mean June-July sunshine hours from Osijek meteorological station (Croatia). The developed model was used for reconstruction of summer sunshine for the time period 1660-2010. We identified extreme summer events and compared them to available documentary historical sources of drought, volcanic eruptions and other reconstructions from the broader region. All extreme summers with low sunshine hours (1712, 1810, 1815, 1843, 1899 and 1966) are connected with volcanic eruptions.

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Section: Transfer Function Developmentmentioning

confidence: 99%

Long-term summer sunshine/moisture stress reconstruction from tree-ring widths from Bosnia and Herzegovina

Poljanšek

Ceglar²,

Levanič

2013

Clim. Past

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“…Nevertheless, in view of the new isotope evidence, we cannot rule out that the correction applied for the early instrumental period for a warm bias in the summer temperatures is overestimated, at least, with respect to the high Alpine air temperature. On the other side, temperature reconstructions from front positions of Alpine glaciers (Leclercq and Oerlemans, 2012) and using Alpine tree rings and lake sediment proxies (Trachsel et al, 2012) suggest even colder temperatures around the mid-19th century compared to the EI-corrected ones (Bo¨hm et al, 2010). All in all, we might interpret the degree of inconsistencies between the multidecadal temperature variability derived from the various instrumental and proxy sources as the remaining actual uncertainty level inherent to the Alpine air temperature records of the 19th century.…”

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confidence: 99%

To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series?

Bohleber

Wagenbach

Schöner

et al. 2013

Tellus B: Chemical and Physical Meteorology

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A B S T R A C T Among Alpine ice core drilling sites, the Colle Gnifetti glacier saddle situated in the Monte Rosa summit range is the only one whose net snow accumulation rate is low enough to offer climate records back to some 1000 yr. It is demonstrated that the strong snow erosion at this site particularly hampers the interpretation of stable water isotope records d 18O, dD in terms of atmospheric temperature changes. We evaluate the d 18O records from four Colle Gnifetti cores for their common variability to extract a composite isotope record that may be compared with the instrumental temperature evidence. Time series analyses over the last 120 yr reveal that the common d18 O signal is mainly reflected in the low frequency variability, starting at the decadal scale.Comparing the correspondingly smoothed composite record to the high-elevation temperature time series (specifically adjusted to the seasonality of the net snow accumulation) reveals the following findings: On the decadal scale, the isotope variability correlates with the temperature record at around R 00.65 but is interrupted by three, ca. 10-yr long mismatch periods. The multidecadal isotope signal closely reflects the strong overall 20th century temperature increase, thereby showing an up to three-fold higher isotope temperature sensitivity than commonly assumed. Over the entire instrumental period back to 1760, five more such mismatch periods are embedded in the generally coherent pattern of the d 18 O and instrumental temperature records (including the strong overestimate of the temperature around 1850 by the isotope temperature proxy). For the early instrumental period (1890Á1760) characterized by a comparably weak longterm temperature trend, the isotope signal generally suggests warmer conditions of about 0.48C compared to instrumental data.

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“…The unfiltered and smoothed AdaPres reconstruction is directly compared with three other Alpine and European reconstructions of summer mean temperatures: Büntgen06 (Büntgen et al, 2006), Büntgen11 (Büntgen et al, 2011), and Trachsel12 (Trachsel et al, 2012) These results reveal a common signal of the AdaPres reconstruction with the compared series on a low-frequency scale and the good potential of the European larch treering chronologies from high-altitude sites in the AdamelloPresanella Group to be used as a summer temperature proxy of the region.…”

Section: Discussionmentioning

confidence: 90%

Tree-ring–based summer mean temperature variations in the Adamello–Presanella Group (Italian Central Alps), 1610–2008 AD

et al. 2013

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Abstract. Climate records from remote mountain sites and for century-long periods are usually lacking for most continents and also for the European Alps. However, detailed reconstructions of climate parameters for pre-instrumental periods in mountain areas, suffering of glacial retreat caused by recent global warming, are needed in the view of a better comprehension of the environmental dynamics. We present here the first annually-resolved reconstruction of summer (JJA) mean temperature for the Adamello-Presanella Group (Central European Alps), one of the most glaciated mountain groups of the Italian Central Alps. The reconstruction has been based on four larch tree-ring width chronologies derived from living trees sampled in four valleys surrounding the Group. The reconstruction spans from 1610 to 2008 and the statistical verification of the reconstruction demonstrates the positive skill of the tree-ring dataset in tracking summer temperature variability also in the recent period.

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Multi-archive summer temperature reconstruction for the European Alps, AD 1053–1996

Cited by 64 publications

References 54 publications

Long-term summer sunshine/moisture stress reconstruction from tree-ring widths from Bosnia and Herzegovina

Long-term summer sunshine/moisture stress reconstruction from tree-ring widths from Bosnia and Herzegovina

To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series?

Tree-ring–based summer mean temperature variations in the Adamello–Presanella Group (Italian Central Alps), 1610–2008 AD

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