Holocene changes in atmospheric circulation recorded in the oxygen-isotope stratigraphy of lacustrine carbonates from northern Sweden
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. Compar...
Published in: | The Holocene |
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Language: | English |
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SAGE Publications
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Online Access: | https://lup.lub.lu.se/record/339983 https://doi.org/10.1191/0959683602hl548rp |
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ftulundlup:oai:lup.lub.lu.se:32b99b8d-ebfb-4dba-ae46-3d2cee5d55ca 2023-05-15T12:59:44+02:00 Holocene changes in atmospheric circulation recorded in the oxygen-isotope stratigraphy of lacustrine carbonates from northern Sweden Hammarlund, Dan Barnekow, Lena Birks, HJB Buchardt, B Edwards, TWD 2002 https://lup.lub.lu.se/record/339983 https://doi.org/10.1191/0959683602hl548rp eng eng SAGE Publications https://lup.lub.lu.se/record/339983 http://dx.doi.org/10.1191/0959683602hl548rp wos:000175101700007 scopus:0036105069 The Holocene; 12(3), pp 339-351 (2002) ISSN: 0959-6836 Geology pollen-climate transfer functions lacustrine carbonates stratigraphy oxygen-isotope stable isotopes palacoclimate atmospheric circulation Holocene northern Sweden contributiontojournal/article info:eu-repo/semantics/article text 2002 ftulundlup https://doi.org/10.1191/0959683602hl548rp 2023-02-01T23:28:54Z 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. Article in Journal/Newspaper Abisko Northern Sweden Lund University Publications (LUP) Abisko ENVELOPE(18.829,18.829,68.349,68.349) The Holocene 12 3 339 351 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology pollen-climate transfer functions lacustrine carbonates stratigraphy oxygen-isotope stable isotopes palacoclimate atmospheric circulation Holocene northern Sweden |
spellingShingle |
Geology pollen-climate transfer functions lacustrine carbonates stratigraphy oxygen-isotope stable isotopes palacoclimate atmospheric circulation Holocene northern Sweden Hammarlund, Dan Barnekow, Lena Birks, HJB Buchardt, B Edwards, TWD Holocene changes in atmospheric circulation recorded in the oxygen-isotope stratigraphy of lacustrine carbonates from northern Sweden |
topic_facet |
Geology pollen-climate transfer functions lacustrine carbonates stratigraphy oxygen-isotope stable isotopes palacoclimate atmospheric circulation Holocene northern Sweden |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Hammarlund, Dan Barnekow, Lena Birks, HJB Buchardt, B Edwards, TWD |
author_facet |
Hammarlund, Dan Barnekow, Lena Birks, HJB Buchardt, B Edwards, TWD |
author_sort |
Hammarlund, Dan |
title |
Holocene changes in atmospheric circulation recorded in the oxygen-isotope stratigraphy of lacustrine carbonates from northern Sweden |
title_short |
Holocene changes in atmospheric circulation recorded in the oxygen-isotope stratigraphy of lacustrine carbonates from northern Sweden |
title_full |
Holocene changes in atmospheric circulation recorded in the oxygen-isotope stratigraphy of lacustrine carbonates from northern Sweden |
title_fullStr |
Holocene changes in atmospheric circulation recorded in the oxygen-isotope stratigraphy of lacustrine carbonates from northern Sweden |
title_full_unstemmed |
Holocene changes in atmospheric circulation recorded in the oxygen-isotope stratigraphy of lacustrine carbonates from northern Sweden |
title_sort |
holocene changes in atmospheric circulation recorded in the oxygen-isotope stratigraphy of lacustrine carbonates from northern sweden |
publisher |
SAGE Publications |
publishDate |
2002 |
url |
https://lup.lub.lu.se/record/339983 https://doi.org/10.1191/0959683602hl548rp |
long_lat |
ENVELOPE(18.829,18.829,68.349,68.349) |
geographic |
Abisko |
geographic_facet |
Abisko |
genre |
Abisko Northern Sweden |
genre_facet |
Abisko Northern Sweden |
op_source |
The Holocene; 12(3), pp 339-351 (2002) ISSN: 0959-6836 |
op_relation |
https://lup.lub.lu.se/record/339983 http://dx.doi.org/10.1191/0959683602hl548rp wos:000175101700007 scopus:0036105069 |
op_doi |
https://doi.org/10.1191/0959683602hl548rp |
container_title |
The Holocene |
container_volume |
12 |
container_issue |
3 |
container_start_page |
339 |
op_container_end_page |
351 |
_version_ |
1766090816252542976 |