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Climate of the Past An interactive open-access journal of the European Geosciences Union
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Volume 13, issue 8
Clim. Past, 13, 1007–1022, 2017
https://doi.org/10.5194/cp-13-1007-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Clim. Past, 13, 1007–1022, 2017
https://doi.org/10.5194/cp-13-1007-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 16 Aug 2017

Research article | 16 Aug 2017

Experiments based on blue intensity for reconstructing North Pacific temperatures along the Gulf of Alaska

Rob Wilson et al.
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Anchukaitis, K. J., D'Arrigo, R. D., Andreu-Hayles, L., Frank, D., Verstege, A., Curtis, A., Buckley, B. M., Jacoby, G. C., and Cook, E. R.: Tree-ring-reconstructed summer temperatures from northwestern North America during the last nine centuries, J. Climate, 26, 3001–3012, 2013.
Anchukaitis, K. J., Wilson, R., Briffa, K., Büntgen, U., Cook, E. R., D'Arrigo, R., Davi, N., Esper, J., Frank, D., Gunnarson, B., Hegerl, G., Helama, S., Klesse, S., Krusic, P. J., Linderholm, H., Myglan, V., Osborn, T., Peng, Z., Rydval, M., Schneider, L., Schurer, A., Wiles, G., and Zorita, E.: Last millennium Northern Hemisphere summer temperatures from tree rings: Part II: spatially resolved reconstructions, Quaternary Sci. Rev., 163, 1–22, https://doi.org/10.1016/j.quascirev.2017.02.020, 2017.
Andreu-Hayles, L., D'Arrigo, R., Anchukaitis, K. J., Beck, P. S., Frank, D., and Goetz, S.: Varying boreal forest response to Arctic environmental change at the Firth River, Alaska, Environ. Res. Lett., 6, 045503, https://doi.org/10.1088/1748-9326/6/4/045503, 2011.
Barclay, D. J., Wiles, G. C., and Calkin, P. E.: A 1119-year tree-ring-width chronology from western Prince William Sound, southern Alaska, The Holocene, 9, 79–84, 1999.
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Blue intensity shows great potential for reconstructing past summer temperatures from conifer trees growing at high latitude or the treeline. However, conifer species that express a strong colour difference between the heartwood and sapwood can impart a long-term trend bias in the resultant reconstructions. Herein, we highlight this issue using eight mountain hemlock sites across the Gulf of Alaska and explore how a non-biased reconstruction of past temperature could be derived using such data.
Blue intensity shows great potential for reconstructing past summer temperatures from conifer...
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