Radiocarbon chronology of glacial lake sediments in the Retezat Mts (South Carpathians, Romania): A window to Late Glacial and Holocene climatic and paleoenvironmental changes

Enikõ Magyari, Mihály Braun, Krisztina Buczkó, Zoltán Kern, Péter László, Katalin Hubay, Miklós Bálint

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

the Retezat Mountains, this study discusses radiocarbon chronology and sediment accumulation rate changes in two sediment profiles in relation to lithostratigraphy, organic content, biogenic silica and major pollenstratigraphic changes. A total of 25 radiocarbon dates were obtained from sediments of two lakes, Lake Brazi (TDB-1; 1740 m a.s.l.) and Lake Gales (Gales-3; 1990 m a.s.l.). Age-depth modeling was performed on TDB-1 using calibrated age ranges from BCal and various curve-fitting methods in psimpoll. Our results suggest that sediment accumulation began between 15,124-15,755 cal yr BP in both lakes and was continuous throughout the Late Glacial and Holocene. We demonstrated that local ecosystem productivity showed delayed response to Late Glacial and Early Holocene climatic changes in the subalpine and alpine zones most likely attributable to the cooling effect of remnant glaciers and meltwater input. However, regional vegetation response was without time lag and indicated forestation and warming at 14,450 and 11,550 cal yr BP, and cooling at ca. 12,800 cal yr BP. In the Holocene one major shift was detected, starting around 6300 cal yr BP and culminating around 5200 cal yr BP. The various proxies suggested summer cooling, shorter duration of the winter ice-cover season and/or increasing size of the water body, probably in response to increasing available moisture.

Original languageEnglish
Pages (from-to)225-248
Number of pages24
JournalCentral European Geology
Volume52
Issue number3
DOIs
Publication statusPublished - Sep 1 2009

Keywords

  • Late Glacial
  • glacial lake sediments
  • loss-on-ignition
  • pollen
  • radiocarbon dating
  • rapid climate change

ASJC Scopus subject areas

  • Geology

Fingerprint Dive into the research topics of 'Radiocarbon chronology of glacial lake sediments in the Retezat Mts (South Carpathians, Romania): A window to Late Glacial and Holocene climatic and paleoenvironmental changes'. Together they form a unique fingerprint.

  • Cite this