| Titre | The last (Koy-Yukon) interglaciation in the Yukon: comparisons with Holocene and interstadial pollen records |
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| Auteur | Schweger, C E; Matthews, J V, Jr |
| Source | The climate and environment of the last interglacial in the Arctic and Subarctic: NATO advanced research workshop; par Rutter, N (éd.); Matthews, J V, Jr (éd.); Schweger, C E (éd.); Quaternary
International vol. 10-12, 1991 p. 85-94, https://doi.org/10.1016/1040-6182(91)90042-m |
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| Année | 1991 |
| Séries alt. | Commission géologique du Canada, Contributions aux publications extérieures 40791 |
| Éditeur | Elsevier BV |
| Réunion | NATO Advanced Research Workshop; Hanstholm; DK; Octobre 19-22, 1990 |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1016/1040-6182(91)90042-m |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Province | Yukon; Territoires du Nord-Ouest |
| SNRC | 117A; 117B; 116N; 116O; 116P; 95L; 95K; 95M; 95N |
| Région | Alaska; Koy; Ch'ijee's Bluff; Little Bear River |
| Sujets | paléoclimatologie; paléoclimats; stades interglaciaires; fossiles; analyses polliniques; assemblages polliniques; pollen; pergélisol; stratigraphie pollinique; Wisconsinien; paludification; Réchauffement
de la planète; paléontologie; géologie des dépôts meubles/géomorphologie; pédologie |
| Illustrations | cartes de localisation; diagrammes polliniques; tableaux |
| Programme | CRSNG Conseil de recherches en sciences
naturelles et en génie du Canada |
| Résumé | (disponible en anglais seulement)
Paleoclimatic reconstructions for the last interglacial (LIG), isotope substage 5e, have achieved new importance for testing climate model simulations and
predicting the outcome of global warming. LIG deposits at Ch'ijee's Bluff, northern Yukon, display high fossil spruce pollen frequencies, extralimital species and a lack of interglacial permafrost; all evidence of a warmer than present climate at the
site. Comparisons between the Ch'ijee's Bluff LIG pollen record and Late glacial-Holocene pollen stratigraphy demonstrates a high degree of similarity that implies similar patterns and rates of species migration and regugia. Compared to Mid and Early
Wisconsinan pollen stratigraphy, the climate of the Wisconsinan interstades was not as warm as that of the LIG, or today's. LIG warmth was insufficient for the spread of pine into northern Yukon. Alder, so important in the northern forests now,
appears to have had a less important role during the LIG, perhaps indicating less widespread permafrost and paludification. Fossiliferous deposits beneath Hungry Creek till (Hughes et al., 1981) are reassigned to the LIG. |
| GEOSCAN ID | 215293 |
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