A frequency-optimised temperature record for the Holocene
Existing global mean surface temperature reconstructions for the Holocene lack high-frequency variability that is essential for contextualising recent trends and extremes in the Earth’s climate system. Here, we isolate and recombine archive-specific climate signals to generate a frequency-optimised...
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| Veröffentlicht in: | Environmental research letters 2023-11, Vol.18 (11), p.114022 |
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| creator | Essell, Helen Krusic, Paul J Esper, Jan Wagner, Sebastian Braconnot, Pascale Jungclaus, Johann Muschitiello, Francesco Oppenheimer, Clive Büntgen, Ulf |
| description | Existing global mean surface temperature reconstructions for the Holocene lack high-frequency variability that is essential for contextualising recent trends and extremes in the Earth’s climate system. Here, we isolate and recombine archive-specific climate signals to generate a frequency-optimised record of interannual to multi-millennial temperature changes for the past 12 000 years. Average temperatures before ∼8000 years BP and after ∼4000 years BP were 0.26 (±2.84) °C and 0.07 (±2.11) °C cooler than the long-term mean (0–12 000 years BP), while the Holocene Climate Optimum ∼7000–4000 years BP was 0.40 (±1.86) °C warmer. Biased towards Northern Hemisphere summer temperatures, our multi-proxy record captures the spectral properties of transient Earth system model simulations for the same spatial and season domain. The new frequency-optimised trajectory emphasises the importance and complex interplay of natural climate forcing factors throughout the Holocene, with an approximation of the full range of past temperature changes providing novel insights for policymakers addressing the risks of recent anthropogenic warming. |
| doi_str_mv | 10.1088/1748-9326/ad0065 |
| format | Article |
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Here, we isolate and recombine archive-specific climate signals to generate a frequency-optimised record of interannual to multi-millennial temperature changes for the past 12 000 years. Average temperatures before ∼8000 years BP and after ∼4000 years BP were 0.26 (±2.84) °C and 0.07 (±2.11) °C cooler than the long-term mean (0–12 000 years BP), while the Holocene Climate Optimum ∼7000–4000 years BP was 0.40 (±1.86) °C warmer. Biased towards Northern Hemisphere summer temperatures, our multi-proxy record captures the spectral properties of transient Earth system model simulations for the same spatial and season domain. 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| subjects | Anthropogenic factors Climate climate reconstructions Climate system Continental interfaces, environment global warming Holocene Holocene climate Northern Hemisphere Ocean, Atmosphere paleoclimate proxy archives Sciences of the Universe Surface temperature Temperature temperature changes Trajectory optimization |
| title | A frequency-optimised temperature record for the Holocene |
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