Warmth-Demanding Species, Glacier Melt Measurements Affirm Early Holocene Svalbard Was 7°C Warmer Than Now

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Using biomarker evidence (for example, the Early Holocene presence of sea creatures unable to survive below fixed warmth thresholds) and glacier melt extent measurements (for example, sea shells buried 6 km inside a glacier), scientists have been colloborating on a growing consensus that much of Arctic Svalbard was about 7°C warmer than today during the Early Holocene, when CO2 concentrations lingered near 260 ppm.

1. Farnsworth et al., 2020: “peak Holocene temperatures reaching 7 °C warmer than today, c. 10 ka BP” shells sampled from within a thrusted debris band located 6 km inside the modern ice margin of a major outlet glacier date to 10.3 ±0.49 ka BP

Image Source: Farnsworth et al., 2020

2. Leopold et al., 2019: “the summer SSTs today around Svalbard are some 5-8°C lower than during the thermal peak of the Early Holocene

Image Source: Leopold et al., 2019

3. van der Bilt et al., 2019: “Warmth was greatest around 10 ka BP, when temperatures were up to ~7 °C higher than present in response to high radiative forcing

Image Source: van der Bilt et al., 2019

4. Łacka et al., 2019: “At approximately 6400 cal yr BP, the SST in Storfjordrenna reached a peak of almost 13 °C” (about 10°C warmer than the 2015 measured temperatures of about 2-4°C) … “after 10,000 cal yr BP, the glaciers in western Svalbard were even smaller than those of the present day “Sea ice-free conditions remained during most of the mid-Holocene

Image Source: Łacka et al., 2019

5. Beierlein et al., 2015: “the maximum BWT [bottom water temperature] amounts to 15.2°C, which is 8-10°C higher than maximum summer BWTs in this region

Image Source: Beierlein et al., 2015



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2 responses to “Warmth-Demanding Species, Glacier Melt Measurements Affirm Early Holocene Svalbard Was 7°C Warmer Than Now”

  1. Faktenmörder: „Globale Erwärmung“ durch Datenfälscher – wobleibtdieglobaleerwaermung

    […] Spitzbergen: Permafrostböden im Jahr 2020 bisher deutlich unterkühlt – da taut nix . Studien: Spitzbergen (Svalbard) vor 10.000 Jahren bis zu 10°C wärmer als […]

  2. Kelly

    Wow – watch how quickly the MM hits the “IGNORE’ button.

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