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Recent summer warming in northwestern Canada exceeds the Holocene thermal maximum

Author

Listed:
  • Trevor J. Porter

    (University of Toronto)

  • Spruce W. Schoenemann

    (University of Montana Western)

  • Lauren J. Davies

    (University of Alberta)

  • Eric J. Steig

    (University of Washington)

  • Sasiri Bandara

    (University of Alberta)

  • Duane G. Froese

    (University of Alberta)

Abstract

Eastern Beringia is one of the few Western Arctic regions where full Holocene climate reconstructions are possible. However, most full Holocene reconstructions in Eastern Beringia are based either on pollen or midges, which show conflicting early Holocene summer temperature histories. This discrepancy precludes understanding the factors that drove past (and potentially future) climate change and calls for independent proxies to advance the debate. We present a ~13.6 ka summer temperature reconstruction in central Yukon, part of Eastern Beringia, using precipitation isotopes in syngenetic permafrost. The reconstruction shows that early Holocene summers were consistently warmer than the Holocene mean, as supported by midges, and a thermal maximum at ~7.6–6.6 ka BP. This maximum was followed by a ~6 ka cooling, and later abruptly reversed by industrial-era warming leading to a modern climate that is unprecedented in the Holocene context and exceeds the Holocene thermal maximum by +1.7 ± 0.7 °C.

Suggested Citation

  • Trevor J. Porter & Spruce W. Schoenemann & Lauren J. Davies & Eric J. Steig & Sasiri Bandara & Duane G. Froese, 2019. "Recent summer warming in northwestern Canada exceeds the Holocene thermal maximum," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-09622-y
    DOI: 10.1038/s41467-019-09622-y
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    Cited by:

    1. Pierre Rostan & Alexandra Rostan, 2023. "The benefit of the Covid‐19 pandemic on global temperature projections," Journal of Forecasting, John Wiley & Sons, Ltd., vol. 42(8), pages 2079-2098, December.
    2. Costas A. Varotsos & Yuri A. Mazei, 2019. "Future Temperature Extremes Will Be More Harmful: A New Critical Factor for Improved Forecasts," IJERPH, MDPI, vol. 16(20), pages 1-10, October.
    3. Rashit M. Hantemirov & Christophe Corona & Sébastien Guillet & Stepan G. Shiyatov & Markus Stoffel & Timothy J. Osborn & Thomas M. Melvin & Ludmila A. Gorlanova & Vladimir V. Kukarskih & Alexander Y. , 2022. "Current Siberian heating is unprecedented during the past seven millennia," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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