Articles | Volume 15, issue 1
Clim. Past, 15, 253–263, 2019
https://doi.org/10.5194/cp-15-253-2019

Special issue: The 4.2 ka BP climatic event

Clim. Past, 15, 253–263, 2019
https://doi.org/10.5194/cp-15-253-2019
Research article
07 Feb 2019
Research article | 07 Feb 2019

Diatom-oxygen isotope record from high-altitude Lake Petit (2200 m a.s.l.) in the Mediterranean Alps: shedding light on a climatic pulse at 4.2 ka

Rosine Cartier et al.

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Short summary
A major environmental change, 4200 years ago, was recorded in the lacustrine sediments of Lake Petit (Mediterranean Alps). The regime shift was described by a modification in erosion processes in the watershed and aquatic species in the lake. This study, based on the analysis of the lake water balance by using oxygen isotopes in diatoms, revealed that these environmental responses were due to a rapid change in precipitation regime, lasting ca. 500 years.