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Climate-driven changes in lake conditions during late MIS 3 and MIS 2: a high-resolution geochemical record from Les Echets, France

Veres, Daniel; Lallier-Verges, Elisabeth; Wohlfarth, Barbara; Lacourse, Terri; Keravis, Didier; Björck, Svante LU ; Preusser, Frank; Andrieu-Ponel, Valerie and Ampel, Linda (2009) In Boreas 38(2). p.230-243
Abstract
Veres, D., Lallier-Verges, E., Wohlfarth, B., Lacourse, T., KEravis, D., Bjorck, S., Preusser, F., Andrieu-Ponel, V. & Ampel, L.: Climate-driven changes in lake conditions during late MIS 3 and MIS 2: a high-resolution geochemical record from Les Echets, France. Boreas, 10.1111/j.1502-3885.2008.00066.x. ISSN 0300-9483. A new set of geochemical data obtained from a long sediment sequence from the Les Echets basin provides a new record of palaeoenvironmental change for western Europe. The sequence covers the late part of Marine Isotope Stage (MIS) 3 and MIS 2 (c. 46.1-15.0 cal. kyr BP) and extends over 30 m of sediment, allowing for high sampling resolution. Distinct cyclic fluctuations in aquatic productivity proxies suggest a tempo of... (More)
Veres, D., Lallier-Verges, E., Wohlfarth, B., Lacourse, T., KEravis, D., Bjorck, S., Preusser, F., Andrieu-Ponel, V. & Ampel, L.: Climate-driven changes in lake conditions during late MIS 3 and MIS 2: a high-resolution geochemical record from Les Echets, France. Boreas, 10.1111/j.1502-3885.2008.00066.x. ISSN 0300-9483. A new set of geochemical data obtained from a long sediment sequence from the Les Echets basin provides a new record of palaeoenvironmental change for western Europe. The sequence covers the late part of Marine Isotope Stage (MIS) 3 and MIS 2 (c. 46.1-15.0 cal. kyr BP) and extends over 30 m of sediment, allowing for high sampling resolution. Distinct cyclic fluctuations in aquatic productivity proxies suggest a tempo of environmental change at Les Echets that resembles the one established for Dansgaard-Oeschger cycles and Heinrich events. Increases in organic carbon are paralleled by high hydrogenous contents and enriched delta C-13(org) and C-org/N-tot ratios, implying a mixture of aquatic and land-derived constituents. The stable isotope values are directly linked to primary aquatic productivity and the input of terrestrial organic matter, enriched during warm, productive, periods, and drastically depleted during cold periods, particularly Heinrich events. Phases of relatively high productivity correlate with Dansgaard-Oeschger interstadials 8-2, while Heinrich events 3 and 2 are also clearly delineated by distinct lithological horizons with very low organic contents, high dry densities and enhanced organic matter oxidation. A large hiatus occurring about the time of Heinrich event 4 suggests that the cold and dry climate reconstructed for this event in the North Atlantic region also greatly affected Les Echets and its catchment. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Boreas
volume
38
issue
2
pages
230 - 243
publisher
Taylor & Francis
external identifiers
  • wos:000264563700004
  • scopus:73649129202
ISSN
1502-3885
DOI
10.1111/j.1502-3885.2008.00066.x
project
Climate Initiative
language
English
LU publication?
yes
id
4f7c6785-1c38-4e0e-8211-db768203e30e (old id 1401175)
date added to LUP
2009-06-15 12:36:00
date last changed
2017-10-22 03:39:38
@article{4f7c6785-1c38-4e0e-8211-db768203e30e,
  abstract     = {Veres, D., Lallier-Verges, E., Wohlfarth, B., Lacourse, T., KEravis, D., Bjorck, S., Preusser, F., Andrieu-Ponel, V. & Ampel, L.: Climate-driven changes in lake conditions during late MIS 3 and MIS 2: a high-resolution geochemical record from Les Echets, France. Boreas, 10.1111/j.1502-3885.2008.00066.x. ISSN 0300-9483. A new set of geochemical data obtained from a long sediment sequence from the Les Echets basin provides a new record of palaeoenvironmental change for western Europe. The sequence covers the late part of Marine Isotope Stage (MIS) 3 and MIS 2 (c. 46.1-15.0 cal. kyr BP) and extends over 30 m of sediment, allowing for high sampling resolution. Distinct cyclic fluctuations in aquatic productivity proxies suggest a tempo of environmental change at Les Echets that resembles the one established for Dansgaard-Oeschger cycles and Heinrich events. Increases in organic carbon are paralleled by high hydrogenous contents and enriched delta C-13(org) and C-org/N-tot ratios, implying a mixture of aquatic and land-derived constituents. The stable isotope values are directly linked to primary aquatic productivity and the input of terrestrial organic matter, enriched during warm, productive, periods, and drastically depleted during cold periods, particularly Heinrich events. Phases of relatively high productivity correlate with Dansgaard-Oeschger interstadials 8-2, while Heinrich events 3 and 2 are also clearly delineated by distinct lithological horizons with very low organic contents, high dry densities and enhanced organic matter oxidation. A large hiatus occurring about the time of Heinrich event 4 suggests that the cold and dry climate reconstructed for this event in the North Atlantic region also greatly affected Les Echets and its catchment.},
  author       = {Veres, Daniel and Lallier-Verges, Elisabeth and Wohlfarth, Barbara and Lacourse, Terri and Keravis, Didier and Björck, Svante and Preusser, Frank and Andrieu-Ponel, Valerie and Ampel, Linda},
  issn         = {1502-3885},
  language     = {eng},
  number       = {2},
  pages        = {230--243},
  publisher    = {Taylor & Francis},
  series       = {Boreas},
  title        = {Climate-driven changes in lake conditions during late MIS 3 and MIS 2: a high-resolution geochemical record from Les Echets, France},
  url          = {http://dx.doi.org/10.1111/j.1502-3885.2008.00066.x},
  volume       = {38},
  year         = {2009},
}