Holocene changes in atmospheric circulation recorded in the oxygen-isotope stratigraphy of lacustrine carbonates from northern Sweden
(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/339983
- author
- Hammarlund, Dan LU ; Barnekow, Lena LU ; Birks, HJB ; Buchardt, B and Edwards, TWD
- organization
- publishing date
- 2002
- 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
- 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
- 2016-04-01 12:00:13
- date last changed
- 2022-02-26 00:29:53
@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}},
keywords = {{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}},
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}},
doi = {{10.1191/0959683602hl548rp}},
volume = {{12}},
year = {{2002}},
}