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- f0b9d343-156c-46e2-aa72-efb121a12265 description "The southern Alpine foreland, facing windward to moist southern airmasses, is daimed to have supported forest vegetation throughout the Last Glaciation. Here we present a multiproxy paleoecological record from a compressed peat, uncovered at Casaletto Ceredano, N-Italy, spanning the interval from 33 to 30.5 kyr cal BP. Stratigraphically, it underlies a fluvioglacial belt attributed to the Last Glacial Maximum.The peat records a floodplain swamp community with tree birch and tall sedges, pine woodlands in upland areas, and only limited patches of open vegetation. Plant macrofossils - bark, charcoal, wood and fruits - establish the predominant role of Betulu pubescens group (downy birch) in the anoxic wetland, thanks to its ability to enhance gas exchange through a distinctive type of bark lenticels. A fire-induced birch-to-pine cyde is repeated twice along the 2500 years-time span covered by the peat layer. The climate reconstructed from modern pollen analogs compares to northern boreal zone, with Tjuly <15 degrees C, excluding warm-temperate trees. A major flood sealing the swamp with minerogenic silt is precisely dated to 30,497 +/- 594 yr cal BP (2 sigma uncertainty). Here, the pollen record shows a substantial forest withdrawal, and development of grasslands and semideserts, pointing to co-factorial action of increased climate continentality and of river dynamics. According to teleconnections with the Atlantic and Arctic framework of the stadial-interstadial climate variability, the age and pattern of this event are consistent with the onset of Heinrich Stadial 3, causing a lockdown of moist westerlies and of their Rossby waves in the W-Mediterranean. (C) 2020 Elsevier B.V. All rights reserved." assertion.
- f0b9d343-156c-46e2-aa72-efb121a12265 contentSize "6189" assertion.
- f0b9d343-156c-46e2-aa72-efb121a12265 dateCreated "2021-12-10 10:07:07.030356+00:00" assertion.
- f0b9d343-156c-46e2-aa72-efb121a12265 creation_mode "MANUAL" assertion.
- f0b9d343-156c-46e2-aa72-efb121a12265 cite-as "Foglini, Federica. "Birch-sedge communities, forest withdrawal and flooding at the beginning of Heinrich Stadial 3 at the southern Alpine foreland." ROHub. Dec 10 ,2021. https://w3id.org/ro-id/f0b9d343-156c-46e2-aa72-efb121a12265." assertion.
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- f0b9d343-156c-46e2-aa72-efb121a12265 about 5028 assertion.
- f0b9d343-156c-46e2-aa72-efb121a12265 name "Birch-sedge communities, forest withdrawal and flooding at the beginning of Heinrich Stadial 3 at the southern Alpine foreland" assertion.
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- f0b9d343-156c-46e2-aa72-efb121a12265 dateModified "2025-03-05 12:47:15.829950+00:00" assertion.
- f0b9d343-156c-46e2-aa72-efb121a12265 datePublished "2021-12-10 10:07:07.030356+00:00" assertion.
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- f0b9d343-156c-46e2-aa72-efb121a12265 author 0000-0002-2736-0052 assertion.