Assessing tree-ring carbon and oxygen stable isotopes for climate reconstruction in the Canadian northeastern boreal forest

Bégin, Christian; Gingras, Mathieu; Savard, Martine M.; Marion, José Carlos; Nicault, Antoine; Bégin, Yves

doi:10.1016/j.palaeo.2015.01.021

Cited by 39 publications

(35 citation statements)

References 55 publications

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“…Then, we have normalized each series relative to the overlapping period and finally calculated an average single regional series for the 1943-2010 period. Previous studies conducted in the study area have shown that ␦ 18 O values strongly correlate with the JJA climatic series (maximal temperature and precipitation) and ␦ 13 C values correlate with spring precipitation and summer maximal temperature (Bégin et al, 2015;Naulier et al, 2014).…”

Section: Climate Datamentioning

confidence: 66%

“…In northeastern Canada, we have already studied the relationship between various climatic parameters and the isotopic ratios (␦ 13 C, ␦ 18 O) of living trees in several sites (Bégin et al, 2015;Naulier et al, 2014). We have determined that the ␦ 13 C and ␦ 18 O variability was significantly linked to June to August (JJA) months and the better correlation was obtained with maximal temperature for both isotopic ratios.…”

Section: Methodsmentioning

confidence: 99%

“…We have determined that the ␦ 13 C and ␦ 18 O variability was significantly linked to June to August (JJA) months and the better correlation was obtained with maximal temperature for both isotopic ratios. However, the ␦ 18 O series correlate negatively with summer precipitation whereas the ␦ 13 C series show strong positive correlations with spring precipitation (Bégin et al, 2015;Naulier et al, 2014; Table 3). …”

Section: Methodsmentioning

confidence: 99%

“…This study relies on unpublished ␦ 18 O and ␦ 13 C series obtained for five black spruce trees from site DA1, along with results for living black spruce trees sampled at the HM1 (5 trees) and L20 sites (4 trees) as described in Bégin et al (2015) and Naulier et al (2014) ( Table 1; Fig. 1).…”

Section: Samples and Laboratory Treatmentmentioning

confidence: 99%

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Temporal instability of isotopes–climate statistical relationships – A study of black spruce trees in northeastern Canada

et al. 2015

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a b s t r a c tClimate reconstructions using stable isotopes (␦ 18 O and ␦ 13 C values) in tree rings are based on relationships between present climatic conditions and isotopic series. This widely used approach relies on the assumption that correlations between stable isotopes and climatic conditions are steady over time. In this paper, we evaluate the strength of the correlations between ␦ 18 O and ␦ 13 C series with several climatic parameters on fourteen black spruce trees coming from three different sites, in northeastern Canada. We applied a 21-year moving window on the r Pearson calculated between stable isotopes and March-May and June-August precipitation, June-August and April-June maximal temperatures. Our results indicate that despite the large distance and differences in stand conditions between the sites, the three sites responded in the same way over time. We show that because the climatic ambiance has changed during the 1980-1990 period due to a positive North Atlantic Oscillation index the ␦ 13 C values are not controlled anymore by spring precipitation or summer maximal temperature in the following two decades. As opposed to ␦ 13 C series, the relationship between summer maximal temperature and ␦ 18 O values was stable over time, and decreased only in the last decade. All these results attest of a "divergence problem" in the last decades which is most pronounced for ␦ 13 C series. We conclude that the spruce ␦ 18 O series appears to be the most appropriate indicator for reconstructing June-August maximal temperature in the studied area despite the divergence issue, given that the calibration-validation tests and reconstruction can exclude the divergent last decade.

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Section: Climate Datamentioning

confidence: 66%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Samples and Laboratory Treatmentmentioning

confidence: 99%

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Temporal instability of isotopes–climate statistical relationships – A study of black spruce trees in northeastern Canada

et al. 2015

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“…Secondly, interesting qualitative information for the Hudson Bay and the James Bay (northwestern Québec) 19th century climate are present in the Hudson's Bay Company trade post journals. Wilson (1988) compiled these data and produced summer temperature series and a wetness index for this region, and the series was then used by Bégin et al (2015) as a reference series for comparisons with their climate reconstruction of the Canadian northeastern boreal forest. Unfortunately, no such data sources are present in the interior part of northern Québec.…”

Section: The Quest For Centennial Climatic Series In Northern Canadamentioning

confidence: 99%

Streamflow variability over the 1881–2011 period in northern Québec: comparison of hydrological reconstructions based on tree rings and geopotential height field reanalysis

Brigode

Brissette²,

Nicault

et al. 2016

Clim. Past

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Abstract. Over the last decades, different methods have been used by hydrologists to extend observed hydro-climatic time series, based on other data sources, such as tree rings or sedimentological datasets. For example, tree ring multi-proxies have been studied for the Caniapiscau Reservoir in northern Québec (Canada), leading to the reconstruction of flow time series for the last 150 years. In this paper, we applied a new hydro-climatic reconstruction method on the Caniapiscau Reservoir and compare the obtained streamflow time series against time series derived from dendrohydrology by other authors on the same catchment and study the natural streamflow variability over the 1881–2011 period in that region. This new reconstruction is based not on natural proxies but on a historical reanalysis of global geopotential height fields, and aims firstly to produce daily climatic time series, which are then used as inputs to a rainfall–runoff model in order to obtain daily streamflow time series. The performances of the hydro-climatic reconstruction were quantified over the observed period, and showed good performances, in terms of both monthly regimes and interannual variability. The streamflow reconstructions were then compared to two different reconstructions performed on the same catchment by using tree ring data series, one being focused on mean annual flows and the other on spring floods. In terms of mean annual flows, the interannual variability in the reconstructed flows was similar (except for the 1930–1940 decade), with noteworthy changes seen in wetter and drier years. For spring floods, the reconstructed interannual variabilities were quite similar for the 1955–2011 period, but strongly different between 1880 and 1940. The results emphasize the need to apply different reconstruction methods on the same catchments. Indeed, comparisons such as those above highlight potential differences between available reconstructions and, finally, allow a retrospective analysis of the proposed reconstructions of past hydro-climatological variabilities.

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Climate signals in carbon and oxygen isotope ratios ofPinus cembratree‐ring cellulose from the Călimani Mountains, Romania

Nagavciuc

Kern

Ionita

et al. 2019

Intl Journal of Climatology

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We analyse annually resolved tree‐ring stable carbon (δ13C) and oxygen (δ18O) isotopic chronologies from Swiss stone pine (Pinus cembra L.) in Romania. The chronologies cover the period between 1876 and 2012 and integrate data from four individual trees from the Calimani Mts in the eastern Carpathians where climatic records are scarce and starts only from 1961. Calibration trials show that the δ13C values correlate with local April–May relative humidity and with regional to larger scale (European) summer precipitation. δ18O correlates significantly with local relative humidity, cloud cover, maximum temperature, as well as European scale drought conditions. In all cases, the climate effects on δ13C values are weaker than those recorded in the δ18O data, with the latter revealing a tendency toward higher (lower) values of δ18O during extremely dry (wet) years. The most striking signal, however, is the strong link between the interannual δ18O variability recorded in the Calimani Mts and large‐scale circulation patterns associated with North Atlantic and Mediteraneean Sea sea surface temperatures. High (low) values of δ18O occur in association with a high (low) pressure system over the central and eastern part of Europe and with a significantly warmer (colder) Mediterranean Sea surface temperature. These results demonstrate the possibility of using tree ring oxygen isotopes from the eastern Carpathians to reconstruct regional drought conditions in eastern Europe on long‐term time scales and larger scale circulation dynamics over the preinstrumental periods.

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Assessing tree-ring carbon and oxygen stable isotopes for climate reconstruction in the Canadian northeastern boreal forest

Cited by 39 publications

References 55 publications

Temporal instability of isotopes–climate statistical relationships – A study of black spruce trees in northeastern Canada

Temporal instability of isotopes–climate statistical relationships – A study of black spruce trees in northeastern Canada

Streamflow variability over the 1881–2011 period in northern Québec: comparison of hydrological reconstructions based on tree rings and geopotential height field reanalysis

Climate signals in carbon and oxygen isotope ratios ofPinus cembratree‐ring cellulose from the Călimani Mountains, Romania

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