Библиографическое описание:Global wood anatomical perspective on the onset of the Late Antique Little Ice Age (LALIA) in the mid-6th century CE : научное издание / U. U. Büntgen [et al.]. - Текст : непосредственный // Science Bulletin. - 2022. - Т. 67, № 22. - P. 2336-2344. - ISSN 2095-9273. - ISSN 2095-9281, DOI 10.1016/j.scib.2022.10.019.
Аннотация:Linked to major volcanic eruptions around 536 and 540 CE, the onset of the Late Antique Little Ice Age has been described as the coldest period of the past two millennia. The exact timing and spatial extent of this exceptional cold phase are, however, still under debate because of the limited resolution and geographical distribution of the available proxy archives. Here, we use 106 wood anatomical thin sections from 23 forest sites and 20 tree species in both hemispheres to search for cell-level fingerprints of ephemeral summer cooling between 530 and 550 CE. After cross-dating and double-staining, we identified 89 Blue Rings (lack of cell wall lignification), nine Frost Rings (cell deformation and collapse), and 93 Light Rings (reduced cell wall thickening) in the Northern Hemisphere. Our network reveals evidence for the strongest temperature depression between mid-July and early-August 536 CE across North America and Eurasia, whereas more localised cold spells occurred in the summers of 532, 540-43, and 548 CE. The lack of anatomical signatures in the austral trees suggests limited incursion of stratospheric volcanic aerosol into the Southern Hemisphere extra-tropics, that any forcing was mitigated by atmosphere-ocean dynamical responses and/or concentrated outside the growing season, or a combination of factors. Our findings demonstrate the advantage of wood anatomical investigations over traditional dendrochronological measurements, provide a benchmark for Earth system models, support cross-disciplinary studies into the entanglements of climate and history, and question the relevance of global climate averages.
Держатель оригинала документа:Archaeology & Palaeoecology, School of Natural and Built Environment, Queen's University Belfast, Belfast BT7 1NN, UK, Cape Horn International Center (CHIC), Punta Arenas 6200000, Chile, Center for Climate and Resilience Research (CR), Santiago 8370449, Chile, CNR-IBE, Institute of BioEconomy, National Research Council, Trento 38121, Italy, Department of Biology, Chemistry and Geography, University of Quebec in Rimouski, Rimouski Qc. G5L 3A1, Canada, Department of Environmental Science, William Paterson University, Wayne NJ 07470, USA, Department of Geography, Faculty of Science, Masaryk University, Brno 61300, Czech Republic, Department of Geography, Johannes Gutenberg University, Mainz 55099, Germany, Department of Geography, University of Cambridge, Cambridge CB2 3EN, UK, Department of Geology, State University of New York at Cortland, Cortland NY 13045, USA, Forest Biometrics Laboratory, Faculty of Forestry, "Stefan cel Mare" University of Suceava, Suceava 720229, Romania, Global Change Research Centre (CzechGlobe), Brno 60300, Czech Republic, Institute of Ecology and Geography, Siberian Federal University, Krasnoyarsk 660041, Russia, Institute of Plant and Animal Ecology, Ural Branch, Russian Academy of Sciences, Yekaterinburg 620144, Russia, Laboratorio de Dendrocronología y Cambio Global, Universidad Austral de Chile, Valdivia 509000, Chile, Laboratory of Tree-Ring Research, University of Arizona, Tucson AZ 85721, USA, School of Environment, The University of Auckland, Auckland 1010, New Zealand, Sukachev Institute of Forest SB RAS, Krasnoyarsk 660036, Russia, Swiss Federal Research Institute (WSL), Birmensdorf 8903, Switzerland, Tree-Ring Laboratory, Lamont-Doherty Earth Observatory, Columbia University, Palisades NY 10964, USA, Ural Institute of Humanities, Ural Federal University, Yekaterinburg 620002, Russia
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