High elevation shrubification in the subarctic during the Holocene Thermal Maximum and 21st century
Rattachement africain : us, is. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Future changes in high latitude shrubification are expected to amplify warming. However, the elevational range and climate sensitivity of shrubification is poorly constrained, which hinders our ability to tune Earth system models. Using a sediment record from a high-elevation lake in Iceland (422 m asl), we leverage ancient birch DNA and mean summer air temperature reconstructed from bacterial lipids to constrain the climate sensitivity of highland shrubification. Our data show that during the Holocene Thermal Maximum, summer temperatures were 2.3 oC warmer than present and birch was present in the lake catchment, >150 m higher than its current regional limit. Subsequently, climate remained the dominant Holocene control on Icelandic birch cover at this site, even after human settlement – making our data ideal constraints for Earth system models. Using Holocene Thermal Maximum warmth as a partial analog for future climate change, ensemble climate projections suggest that the re-expansion of birch to higher elevations is likely by 2100 CE. Birch woodlands in Iceland were hundreds of meters higher during past warm periods in Earth history than at present, according to complementary lake sediment records of ancient plant DNA and lipid-inferred temperatures.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- High elevation shrubification in the subarctic during the Holocene Thermal Maximum and 21st century
- Date Crossref
- 26/08/2026
- Éditeur
- Springer Science and Business Media LLC
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Cooperative Institute for Research in Environmental Sciences pays non établi dans la noticeStructure de recherche
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Institute of Arctic and Alpine Research pays non établi dans la noticeStructure de recherche
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University of Colorado Boulder Cooperative Institute for Research in Environmental Sciences pays non établi dans la noticeUniversité ou école supérieure
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University of California Department of Ecology and Evolutionary Biology pays non établi dans la noticeUniversité ou école supérieure
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University of Wyoming Department of Geology and Geophysics pays non établi dans la noticeUniversité ou école supérieure
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University of Iceland pays non établi dans la noticeUniversité ou école supérieure
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Faculty of Earth Sciences pays non établi dans la noticeUniversité ou école supérieure
Cooperative Institute for Research in Environmental Sciences, Institute of Arctic and Alpine Research et Cooperative Institute for Research in Environmental Sciences — University of Colorado Boulder, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.