Une reconstitution des climats du dernier cycle climatique à partir des diagrammes polliniques. Comparaison avec les données océaniques et glaciaires
- Title
- Une reconstitution des climats du dernier cycle climatique à partir des diagrammes polliniques. Comparaison avec les données océaniques et glaciaires
- Creator(s)
- Bosselin, Bruno
- Date
- 2003
- Is Part Of
-
Archeologia e Calcolatori
- Volume
- 14
- Pages
- 111–136
- Language
- fra
- Rights
- CC BY-NC-ND 4.0
- Abstract
- The multivariate treatment of long pollen sequences coming from peat bogs constitutes an easy and effective method of factorial regression for the semi-quantitative reconstruction of the Paleoclimates. The comparison of the results obtained for the upper Pleistocene with the isotopic profiles of sea- and ice-cores, then with the previous methods, confirms a structuralization of the last climatic cycle in four periods: the interglacial Riss/Wurm including the optimum Eemian, the lower pleniglacial, the Wurmian interpleniglacial and the upper pleniglacial, before the Holocene. A numbering system of these oscillations, correlated with the Dansgaard-Oeschger events recognized in the ice-cores of Greenland, is proposed. A final statistical treatment shows a cyclic evolution of the forest vegetation during the Eemian, an evolution which better translates the variations of the Paleoclimates (temperature and humidity) than the arboreal pollen rate (AP).
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