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A Late Weichselian Stable-Isotope Stratigraphy Compared with Biostratigraphical Data - A Case-Study from Southern Sweden

Hammarlund, Dan LU and Lemdahl, G (1994) In Journal of Quaternary Science 9(1). p.13-31
Abstract
Late Weichselian lake sediments from a site in southern Sweden, were analysed for stable carbon and oxygen isotopes, as well as plant macrofossils and insect remains. By comparison of independent data sets, general climatic changes were demonstrated. Lithological, chemical and stable isotope data reveal two significant climatic oscillations at ca. 12 200-12 000 and ca. 11 000-10 200 yr BP respectively. Continental climatic conditions, indicated by evaporative enrichment of O-18 in lake marl, characterise parts of the early lake history, including the Older Dryas Stadial. Distinct variations of deltaC-13 in organic material is discussed in terms of climatically induced changes in lake-water chemistry. Different types of photosynthetic... (More)
Late Weichselian lake sediments from a site in southern Sweden, were analysed for stable carbon and oxygen isotopes, as well as plant macrofossils and insect remains. By comparison of independent data sets, general climatic changes were demonstrated. Lithological, chemical and stable isotope data reveal two significant climatic oscillations at ca. 12 200-12 000 and ca. 11 000-10 200 yr BP respectively. Continental climatic conditions, indicated by evaporative enrichment of O-18 in lake marl, characterise parts of the early lake history, including the Older Dryas Stadial. Distinct variations of deltaC-13 in organic material is discussed in terms of climatically induced changes in lake-water chemistry. Different types of photosynthetic assimilation of dissolved inorganic carbon is proposed as a contributing factor influencing lake marl deltaC-13. The universal application of a positive correlation between lake marl deltaO-18 and mean annual air temperature is questioned. Quantifications of mean summer and winter temperatures based on beetle analysis show a climatic optimum around 12 000 yr BP, a marked cooling around 11 000 yr BP and a strong amelioration at ca. 10 200 yr BP. These climatic events were accompanied by distinct changes in aquatic vegetation. Plant macrofossil and insect analyses indicate an open vegetation during the entire period studied. Biostratigraphical data reflecting local limnic and terrestrial vegetation and regional climate facilitate the interpretation of stable isotope data. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
STABLE ISOTOPES, INSECTS, PLANT MACROFOSSILS, LATE WEICHSELIAN, LAKE, SEDIMENTS
in
Journal of Quaternary Science
volume
9
issue
1
pages
13 - 31
publisher
John Wiley & Sons
external identifiers
  • wos:A1994NF74100002
  • scopus:0028192339
ISSN
1099-1417
DOI
10.1002/jqs.3390090103
language
English
LU publication?
yes
id
adfe82ac-c337-49b0-91a9-a1d57c5d46db (old id 4157631)
date added to LUP
2013-11-21 10:36:39
date last changed
2017-07-30 04:44:07
@article{adfe82ac-c337-49b0-91a9-a1d57c5d46db,
  abstract     = {Late Weichselian lake sediments from a site in southern Sweden, were analysed for stable carbon and oxygen isotopes, as well as plant macrofossils and insect remains. By comparison of independent data sets, general climatic changes were demonstrated. Lithological, chemical and stable isotope data reveal two significant climatic oscillations at ca. 12 200-12 000 and ca. 11 000-10 200 yr BP respectively. Continental climatic conditions, indicated by evaporative enrichment of O-18 in lake marl, characterise parts of the early lake history, including the Older Dryas Stadial. Distinct variations of deltaC-13 in organic material is discussed in terms of climatically induced changes in lake-water chemistry. Different types of photosynthetic assimilation of dissolved inorganic carbon is proposed as a contributing factor influencing lake marl deltaC-13. The universal application of a positive correlation between lake marl deltaO-18 and mean annual air temperature is questioned. Quantifications of mean summer and winter temperatures based on beetle analysis show a climatic optimum around 12 000 yr BP, a marked cooling around 11 000 yr BP and a strong amelioration at ca. 10 200 yr BP. These climatic events were accompanied by distinct changes in aquatic vegetation. Plant macrofossil and insect analyses indicate an open vegetation during the entire period studied. Biostratigraphical data reflecting local limnic and terrestrial vegetation and regional climate facilitate the interpretation of stable isotope data.},
  author       = {Hammarlund, Dan and Lemdahl, G},
  issn         = {1099-1417},
  keyword      = {STABLE ISOTOPES,INSECTS,PLANT MACROFOSSILS,LATE WEICHSELIAN,LAKE,SEDIMENTS},
  language     = {eng},
  number       = {1},
  pages        = {13--31},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Quaternary Science},
  title        = {A Late Weichselian Stable-Isotope Stratigraphy Compared with Biostratigraphical Data - A Case-Study from Southern Sweden},
  url          = {http://dx.doi.org/10.1002/jqs.3390090103},
  volume       = {9},
  year         = {1994},
}