Deux enregistrements morphosédimentaires des rythmes climatiques en domaine méditerranéen du Tardiglaciaire à l'AItantique (bassin du Saignon, Alpes du Sud, Marais des Baux, Basse Provence) / Lake-level changes (Marais des Baux, Basse Provence, France) and alluvial detritism evolution (Saignon bassin, southern Alps, France) as evidences of climatic changes from Allerod to Atlantic.

摘要

Lake-level changes in Marais des Baux (Basse Provence, France) from Allerôd to Atlantic are reconstructed by carbonates shape analysis and ostracodology. During the same period, the dendrogeomorphological study of the Saignon catchment (Alpes du Sud, France) allows to date several torrential crises. The good correlation between these data demonstrates that periods of global moisture increase coincide with periods of frequent stormy rainfalls. A stormy oscillation is detected at the end of the Allerôd in the Alps. The cold Younger Dryas oscillation is complex, wet, dry then wet. Preboreal appears dry. Boreal shows a wet and stormy oscillation, as the first part of the Atlantic period, the later also showing a warming. The evolution of the Provence area looks quite similar to the north-european pattern and other north-mediterranean areas, but appears strongly affected by saisonnal contrasts.