Consistent multidecadal variability in global temperature reconstructions and simulations over the Common Era
| Autor: | Neukom, L. A. Barboza, M. P. Erb, F. Shi, J. Emile-Geay, M. N. Evans, J. Franke, D. Kaufman, L. Lücke, K. Rehfeld, A. Schurer, V. Valler, F. Zhu, S. Brönnimann, G. J. Hakim, B. J. Henley, F. C. Ljungqvist, N. McKay, and L. von Gunten |
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| Rok vydání: | 2019 |
| Předmět: |
010504 meteorology & atmospheric sciences
Global temperature Climate system Climate change Forcing (mathematics) 010502 geochemistry & geophysics 01 natural sciences Article Amplitude 13. Climate action Climatology Paleoclimatology General Earth and Planetary Sciences Mean radiant temperature Volcanic aerosol 0105 earth and related environmental sciences |
| Zdroj: | Nature Geoscience Neukom, R, Barboza, L A, Erb, M P, Shi, F, Emile-Geay, J, Evans, M N, Franke, J, Kaufman, D S, Lücke, L, Rehfeld, K, Schurer, A, Zhu, F, Brönniman, S, Hakim, G J, Henley, B J, Charpentier Ljungqvist, F, McKay, N, Valler, V & von Gunten, L 2019, ' Consistent multi-decadal variability in global temperature reconstructions and simulations over the Common Era ', Nature Geoscience . https://doi.org/10.1038/s41561-019-0400-0 Nature geoscience |
| ISSN: | 1752-0894 |
| DOI: | 10.1038/s41561-019-0400-0 |
| Popis: | Multidecadal surface temperature changes may be forced by natural as well as anthropogenic factors, or arise unforced from the climate system. Distinguishing these factors is essential for estimating sensitivity to multiple climatic forcings and the amplitude of the unforced variability. Here we present 2,000-year-long global mean temperature reconstructions using seven different statistical methods that draw from a global collection of temperature-sensitive palaeoclimate records. Our reconstructions display synchronous multidecadal temperature fluctuations that are coherent with one another and with fully forced millennial model simulations from the Coupled Model Intercomparison Project Phase 5 across the Common Era. A substantial portion of pre-industrial (1300–1800 CE) variability at multidecadal timescales is attributed to volcanic aerosol forcing. Reconstructions and simulations qualitatively agree on the amplitude of the unforced global mean multidecadal temperature variability, thereby increasing confidence in future projections of climate change on these timescales. The largest warming trends at timescales of 20 years and longer occur during the second half of the twentieth century, highlighting the unusual character of the warming in recent decades. |
| Databáze: | OpenAIRE |
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