Publications des scientifiques de l'IRD

Cartier R., Vidal L., Sylvestre Florence, Sonzogni C., Guiter F., Brisset E., Miramont C. (2022). Paleohydrological history of Lake Allos (2200 m a.s.l) since 13 500 cal a bp in the Mediterranean Alps inferred from an ostracod delta O-18 record. Journal of Quaternary Science, [Early access], [12 p.]. ISSN 0267-8179.

Titre du document
Paleohydrological history of Lake Allos (2200 m a.s.l) since 13 500 cal a bp in the Mediterranean Alps inferred from an ostracod delta O-18 record
Année de publication
2022
Type de document
Article référencé dans le Web of Science WOS:000782203300001
Auteurs
Cartier R., Vidal L., Sylvestre Florence, Sonzogni C., Guiter F., Brisset E., Miramont C.
Source
Journal of Quaternary Science, 2022, [Early access], [12 p.] ISSN 0267-8179
This paper presents the first Lateglacial/Holocene (the last 13 500 cal a bp) ostracod delta O-18 record to infer hydroclimate variability in the Southern French Alps. Cytherissa lacustris (delta O-18(sp)) shells extracted from the sediments of Lake Allos allowed a reconstruction of delta O-18(lake water) (delta O-18(lw)) except for the interval 5800-2800 cal a bp. The shape of the Younger Dryas (YD) clearly differed from records documented in the northern Alps. First, delta O-18(lw) values remained close to modern values before a marked drop ca. 12 000 cal a bp. Then, after several oscillations, delta O-18(lw) values increased, reaching the highest value of the record ca. 6100 cal a bp during a thermal optimum for this latitude. Finally, low delta O-18(lw) values occurred from 450 to 100 cal a bp during the Little Ice Age (LIA) following the Medieval Climate anomaly. At the beginning of the YD, delta O-18(lw) probably reflected changes in local glacier dynamics and precipitation sources. The following decrease in delta O-18(lw) values was associated with higher freshwater inputs during the second half of the YD. During the LIA, the low delta O-18 values are consistent with a higher torrential activity and lower air temperatures.
Plan de classement
Sciences du milieu [021] ; Géologie et formations superficielles [064]
Descripteurs
ZONE MEDITERRANEENNE
Description Géographique
FRANCE
Localisation
Fonds IRD [F B010084682]
Identifiant IRD
fdi:010084682
Contact