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Title

Environmental imprints of climate changes and anthropogenic activities in the Ore Mountains of Bohemia (Central Europe) since 13 cal. kyr BP

Publication Year

2014

Author(s)
  • Veron, Alain
  • Novak, Martin
  • Brizova, Eva
  • Stepanova, Marketa
Source
HOLOCENE Volume: 24 Issue: 8 Pages: 919-931 Published: 2014
ISSN
0959-6836 eISSN: 1477-0911
Abstract

We have measured pollen, aluminum, and lead abundances in a Czech peat bog at Bozi Dar in order to investigate the environmental impact of Holocene climate changes and mining activities in Central Europe. The pollen record shows a continuous vegetal cover since 13 kyr BP. Aluminum and pollen deposition characterize the Younger Dryas (YD) cold event at 12.3-11.0 kyr BP, within its expected time frame in Northern Europe. Aluminum fluxes reveal four other significant dust events with significant Asian and Saharan sources, as shown with variations in stable Pb-204, Pb-206, and Pb-207 isotopes. Recurrent Asian incursions are seen at Bozi Dar during the YD and Mid-Holocene dust events (at 7.1, 6.5, and 5.9 kyr BP). These Asian imprints are also observed by Le Roux and colleagues during the YD in the nearest Holocene-long geochemical peat record from Switzerland (Etang de la Gru re). We do not see at Bozi Dar the distinct western European volcanic inputs identified in the Swiss peat by Shotyk and colleagues. However, isotopic ratios characteristics of Mediterranean airflows are evident at both locations during the Mid-and Late Holocene. The occurrence of these various air mass sources in Switzerland and the Czech Republic substantiates Holocene atmospheric circulation models in Central Europe with dominating zonal airflows during the Early Holocene, followed by a governing meridian dispersion during the Mid-and Late Holocene. Lead inputs at 5.1-4.3 and 1.9 kyr BP cannot be explained by increased dust deposition only. The 1.9 kyr event fits local Bohemian ore isotopic imprints of which isotopic signatures are seen as early as 2.2 kyr BP in our core, hence revealing the oldest ever environmental record of mining-related activities in the Czech Republic. Relatively elevated Pb deposition at 5.1 and 4.3 kyr BP are tentatively attributed to contamination that may be from local sources and/or long-range transport.

Author Keyword(s)
  • Asia
  • Central Europe
  • dust
  • Holocene
  • lead isotopes
  • Mediterranean
  • mining
  • peat bog
  • pollen
KeyWord(s) Plus
  • ATMOSPHERIC LEAD POLLUTION
  • YOUNGER DRYAS EVENT
  • C-14 YR BP
  • LAST GLACIAL PERIOD
  • MONT-LOZERE MASSIF
  • PB ISOTOPE RECORD
  • NORTHERN SWEDEN
  • LAKE-SEDIMENTS
  • PEAT BOG
  • HOLOCENE CLIMATE
ESI Discipline(s)
  • Environment/Ecology
  • Geosciences
Web of Science Category(ies)
  • Geography, Physical
  • Geosciences, Multidisciplinary
Adress(es)

[Veron, Alain] Aix Marseille Univ, F-13545 Aix En Provence 4, France

Reprint Adress

Veron, A (reprint author), Aix Marseille Univ, CEREGE UM34, UMR CNRS 7730, BP80, F-13545 Aix En Provence 4, France.

Country(ies)
  • France
CNRS - Adress(es)
  • Centre européen de recherche et d'enseignement de géosciences de l'environnement (CEREGE), UMR7330
Accession Number
WOS:000340131800004
uid:/V46PQ9G1
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