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Pilgrimstad revisited - a multi-proxy reconstruction of Early/Middle Weichselian climate and environment at a key site in central Sweden

Wohlfarth, Barbara; Alexanderson, Helena LU ; Ampel, Linda; Bennike, Ole; Engels, Stefan; Johnsen, Timothy; Lundqvist, Jan and Reimer, Paula (2011) In Boreas 40(2). p.211-230
Abstract
The site Pilgrimstad in central Sweden has often been cited as a key locality for discussions of ice-free/ice-covered intervals during the Early and Middle Weichselian. Multi-proxy investigations of a recently excavated section at Pilgrimstad now provide a revised picture of the climatic and environmental development between similar to 80 and 36 ka ago. The combination of sedimentology, geochemistry, OSL and 14C dating, and macrofossil, siliceous microfossil and chironomid analyses shows: (i) a lower succession of glaciofluvial/fluvial, lacustrine and glaciolacustrine sediments; (ii) an upper lacustrine sediment sequence; and (iii) Last Glacial Maximum till cover. Microfossils in the upper lacustrine sediments are initially characteristic... (More)
The site Pilgrimstad in central Sweden has often been cited as a key locality for discussions of ice-free/ice-covered intervals during the Early and Middle Weichselian. Multi-proxy investigations of a recently excavated section at Pilgrimstad now provide a revised picture of the climatic and environmental development between similar to 80 and 36 ka ago. The combination of sedimentology, geochemistry, OSL and 14C dating, and macrofossil, siliceous microfossil and chironomid analyses shows: (i) a lower succession of glaciofluvial/fluvial, lacustrine and glaciolacustrine sediments; (ii) an upper lacustrine sediment sequence; and (iii) Last Glacial Maximum till cover. Microfossils in the upper lacustrine sediments are initially characteristic for oligo- to mesotrophic lakes, and macrofossils indicate arctic/sub-arctic environments and mean July temperatures > 8 degrees C. These conditions were, however, followed by a return to a low-nutrient lake and a cold and dry climate. The sequence contains several hiatuses, as shown by the often sharp contacts between individual units, which suggests that ice-free intervals alternated with possible ice advances during certain parts of the Early and Middle Weichselian. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Boreas
volume
40
issue
2
pages
211 - 230
publisher
Taylor & Francis
external identifiers
  • wos:000288759400001
  • scopus:79953007052
ISSN
1502-3885
DOI
10.1111/j.1502-3885.2010.00192.x
language
English
LU publication?
no
id
6152f3af-dfe6-4681-89e2-d08b549e2ecf (old id 4449984)
date added to LUP
2014-05-26 09:24:40
date last changed
2017-01-01 03:31:36
@article{6152f3af-dfe6-4681-89e2-d08b549e2ecf,
  abstract     = {The site Pilgrimstad in central Sweden has often been cited as a key locality for discussions of ice-free/ice-covered intervals during the Early and Middle Weichselian. Multi-proxy investigations of a recently excavated section at Pilgrimstad now provide a revised picture of the climatic and environmental development between similar to 80 and 36 ka ago. The combination of sedimentology, geochemistry, OSL and 14C dating, and macrofossil, siliceous microfossil and chironomid analyses shows: (i) a lower succession of glaciofluvial/fluvial, lacustrine and glaciolacustrine sediments; (ii) an upper lacustrine sediment sequence; and (iii) Last Glacial Maximum till cover. Microfossils in the upper lacustrine sediments are initially characteristic for oligo- to mesotrophic lakes, and macrofossils indicate arctic/sub-arctic environments and mean July temperatures > 8 degrees C. These conditions were, however, followed by a return to a low-nutrient lake and a cold and dry climate. The sequence contains several hiatuses, as shown by the often sharp contacts between individual units, which suggests that ice-free intervals alternated with possible ice advances during certain parts of the Early and Middle Weichselian.},
  author       = {Wohlfarth, Barbara and Alexanderson, Helena and Ampel, Linda and Bennike, Ole and Engels, Stefan and Johnsen, Timothy and Lundqvist, Jan and Reimer, Paula},
  issn         = {1502-3885},
  language     = {eng},
  number       = {2},
  pages        = {211--230},
  publisher    = {Taylor & Francis},
  series       = {Boreas},
  title        = {Pilgrimstad revisited - a multi-proxy reconstruction of Early/Middle Weichselian climate and environment at a key site in central Sweden},
  url          = {http://dx.doi.org/10.1111/j.1502-3885.2010.00192.x},
  volume       = {40},
  year         = {2011},
}