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Holocene changes in atmospheric circulation recorded in the oxygen-isotope stratigraphy of lacustrine carbonates from northern Sweden

Hammarlund, Dan LU ; Barnekow, Lena LU ; Birks, HJB; Buchardt, B and Edwards, TWD (2002) In The Holocene 12(3). p.339-351
Abstract
The oxygen-isotope composition of local precipitation (delta(18)O(P)) is reconstructed from carbonate lake-sediment components in a sediment core covering the last 10000 calendar years from Lake Tibetanus, a small, hydrologically open, groundwater-fed take in the Abisko area, northern Sweden. Comparison of the delta(18)O(P) history with a pollen-based palaeotemperature record from the same core clearly reveals pronounced deviations from the normally expected temporal delta(18)O(P)-temperature relation (so-called 'Dansgaard relation') that may be a function of changing oceanicity. The transition from relatively moist, maritime conditions in the early Holocene to a much drier climate after 6500 cal. BP is reflected by major changes in forest... (More)
The oxygen-isotope composition of local precipitation (delta(18)O(P)) is reconstructed from carbonate lake-sediment components in a sediment core covering the last 10000 calendar years from Lake Tibetanus, a small, hydrologically open, groundwater-fed take in the Abisko area, northern Sweden. Comparison of the delta(18)O(P) history with a pollen-based palaeotemperature record from the same core clearly reveals pronounced deviations from the normally expected temporal delta(18)O(P)-temperature relation (so-called 'Dansgaard relation') that may be a function of changing oceanicity. The transition from relatively moist, maritime conditions in the early Holocene to a much drier climate after 6500 cal. BP is reflected by major changes in forest extent and composition as recorded by pollen and plant macrofossil data. At the time of maximum influence of westerly air-mass circulation (high zonal index) c. 9500 cal. BP, brought about by high summer insolation and enhanced meridional pressure gradients. delta(18)O(P) at Lake Tibetanus was about 2%, higher than would be predicted by the modem isotope-temperature relation, The occurrence of long-term changes in delta(18)O(P)-temperature relations, which are more sensitive measures of palaeoclimate than either delta(18)O(P) or temperature alone, needs to be taken into account when extracting palaeoclimatic information from continental oxygen-isotope records. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
pollen-climate transfer functions, lacustrine carbonates, stratigraphy, oxygen-isotope, stable isotopes, palacoclimate, atmospheric circulation, Holocene, northern Sweden
in
The Holocene
volume
12
issue
3
pages
339 - 351
publisher
SAGE Publications Inc.
external identifiers
  • wos:000175101700007
  • scopus:0036105069
ISSN
0959-6836
DOI
10.1191/0959683602hl548rp
language
English
LU publication?
yes
id
32b99b8d-ebfb-4dba-ae46-3d2cee5d55ca (old id 339983)
date added to LUP
2007-08-23 11:20:42
date last changed
2017-11-05 03:36:48
@article{32b99b8d-ebfb-4dba-ae46-3d2cee5d55ca,
  abstract     = {The oxygen-isotope composition of local precipitation (delta(18)O(P)) is reconstructed from carbonate lake-sediment components in a sediment core covering the last 10000 calendar years from Lake Tibetanus, a small, hydrologically open, groundwater-fed take in the Abisko area, northern Sweden. Comparison of the delta(18)O(P) history with a pollen-based palaeotemperature record from the same core clearly reveals pronounced deviations from the normally expected temporal delta(18)O(P)-temperature relation (so-called 'Dansgaard relation') that may be a function of changing oceanicity. The transition from relatively moist, maritime conditions in the early Holocene to a much drier climate after 6500 cal. BP is reflected by major changes in forest extent and composition as recorded by pollen and plant macrofossil data. At the time of maximum influence of westerly air-mass circulation (high zonal index) c. 9500 cal. BP, brought about by high summer insolation and enhanced meridional pressure gradients. delta(18)O(P) at Lake Tibetanus was about 2%, higher than would be predicted by the modem isotope-temperature relation, The occurrence of long-term changes in delta(18)O(P)-temperature relations, which are more sensitive measures of palaeoclimate than either delta(18)O(P) or temperature alone, needs to be taken into account when extracting palaeoclimatic information from continental oxygen-isotope records.},
  author       = {Hammarlund, Dan and Barnekow, Lena and Birks, HJB and Buchardt, B and Edwards, TWD},
  issn         = {0959-6836},
  keyword      = {pollen-climate transfer functions,lacustrine carbonates,stratigraphy,oxygen-isotope,stable isotopes,palacoclimate,atmospheric circulation,Holocene,northern Sweden},
  language     = {eng},
  number       = {3},
  pages        = {339--351},
  publisher    = {SAGE Publications Inc.},
  series       = {The Holocene},
  title        = {Holocene changes in atmospheric circulation recorded in the oxygen-isotope stratigraphy of lacustrine carbonates from northern Sweden},
  url          = {http://dx.doi.org/10.1191/0959683602hl548rp},
  volume       = {12},
  year         = {2002},
}