Holocene Climate Inferred from Oxygen Isotope Ratios in Lake Sediments, Central Brooks Range, Alaska
Abstract Analyses of sediment cores from two lakes in the central Brooks Range provide temperature and moisture balance information for the past ∼8500 cal yr at century-scale resolution. Two methods of oxygen isotope analysis are used to reconstruct past changes in the effective moisture (precipitat...
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Cambridge University Press (CUP)
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crcambridgeupr:10.1006/qres.2001.2219 2024-06-09T07:45:11+00:00 Holocene Climate Inferred from Oxygen Isotope Ratios in Lake Sediments, Central Brooks Range, Alaska Anderson, Lesleigh Abbott, Mark B. Finney, Bruce P. 2001 http://dx.doi.org/10.1006/qres.2001.2219 http://api.elsevier.com/content/article/PII:S0033589401922197?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589401922197?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400028453 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 55, issue 3, page 313-321 ISSN 0033-5894 1096-0287 journal-article 2001 crcambridgeupr https://doi.org/10.1006/qres.2001.2219 2024-05-15T13:15:59Z Abstract Analyses of sediment cores from two lakes in the central Brooks Range provide temperature and moisture balance information for the past ∼8500 cal yr at century-scale resolution. Two methods of oxygen isotope analysis are used to reconstruct past changes in the effective moisture (precipitation minus evaporation) and temperature. Effective moisture is inferred from oxygen isotope ratios in sediment cellulose from Meli Lake (area ∼0.13 km 2 , depth 19.4 m). The lake has a low watershed-to-lake-area ratio (7) and significant evaporation relative to input. Summer temperature shifts are based on oxygen isotope analyses of endogenic calcite from Tangled Up Lake (area ∼0.25 km 2 , depth 3.5 m). This basin has a larger watershed-to-lake-area ratio (91) and less evaporation relative to input. Sediment oxygen isotope analyses from the two sites indicate generally more arid conditions than present prior to ∼6000 cal yr B.P. Subsequently, the region became increasingly wet. Temperature variability is recorded minimally at centennial scale resolution with values that are generally cool for the past ∼6700 cal yr. The timing and direction of climate variability indicated by the oxygen isotope time series from Meli and Tangled Up lakes are consistent with previously established late Holocene glacier advances at ∼5000 cal yr B.P. in the central Brooks Range, and high lake-levels at Birch Lake since ∼5500 cal yr B.P. This unique use of oxygen isotopes reveals both moisture balance and temperature histories at previously undetected high-resolution temporal scales for northern Alaska during the middle to late Holocene. Article in Journal/Newspaper Brooks Range glacier Alaska Cambridge University Press High Lake ENVELOPE(-110.849,-110.849,67.386,67.386) Quaternary Research 55 3 313 321 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract Analyses of sediment cores from two lakes in the central Brooks Range provide temperature and moisture balance information for the past ∼8500 cal yr at century-scale resolution. Two methods of oxygen isotope analysis are used to reconstruct past changes in the effective moisture (precipitation minus evaporation) and temperature. Effective moisture is inferred from oxygen isotope ratios in sediment cellulose from Meli Lake (area ∼0.13 km 2 , depth 19.4 m). The lake has a low watershed-to-lake-area ratio (7) and significant evaporation relative to input. Summer temperature shifts are based on oxygen isotope analyses of endogenic calcite from Tangled Up Lake (area ∼0.25 km 2 , depth 3.5 m). This basin has a larger watershed-to-lake-area ratio (91) and less evaporation relative to input. Sediment oxygen isotope analyses from the two sites indicate generally more arid conditions than present prior to ∼6000 cal yr B.P. Subsequently, the region became increasingly wet. Temperature variability is recorded minimally at centennial scale resolution with values that are generally cool for the past ∼6700 cal yr. The timing and direction of climate variability indicated by the oxygen isotope time series from Meli and Tangled Up lakes are consistent with previously established late Holocene glacier advances at ∼5000 cal yr B.P. in the central Brooks Range, and high lake-levels at Birch Lake since ∼5500 cal yr B.P. This unique use of oxygen isotopes reveals both moisture balance and temperature histories at previously undetected high-resolution temporal scales for northern Alaska during the middle to late Holocene. |
format |
Article in Journal/Newspaper |
author |
Anderson, Lesleigh Abbott, Mark B. Finney, Bruce P. |
spellingShingle |
Anderson, Lesleigh Abbott, Mark B. Finney, Bruce P. Holocene Climate Inferred from Oxygen Isotope Ratios in Lake Sediments, Central Brooks Range, Alaska |
author_facet |
Anderson, Lesleigh Abbott, Mark B. Finney, Bruce P. |
author_sort |
Anderson, Lesleigh |
title |
Holocene Climate Inferred from Oxygen Isotope Ratios in Lake Sediments, Central Brooks Range, Alaska |
title_short |
Holocene Climate Inferred from Oxygen Isotope Ratios in Lake Sediments, Central Brooks Range, Alaska |
title_full |
Holocene Climate Inferred from Oxygen Isotope Ratios in Lake Sediments, Central Brooks Range, Alaska |
title_fullStr |
Holocene Climate Inferred from Oxygen Isotope Ratios in Lake Sediments, Central Brooks Range, Alaska |
title_full_unstemmed |
Holocene Climate Inferred from Oxygen Isotope Ratios in Lake Sediments, Central Brooks Range, Alaska |
title_sort |
holocene climate inferred from oxygen isotope ratios in lake sediments, central brooks range, alaska |
publisher |
Cambridge University Press (CUP) |
publishDate |
2001 |
url |
http://dx.doi.org/10.1006/qres.2001.2219 http://api.elsevier.com/content/article/PII:S0033589401922197?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589401922197?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400028453 |
long_lat |
ENVELOPE(-110.849,-110.849,67.386,67.386) |
geographic |
High Lake |
geographic_facet |
High Lake |
genre |
Brooks Range glacier Alaska |
genre_facet |
Brooks Range glacier Alaska |
op_source |
Quaternary Research volume 55, issue 3, page 313-321 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1006/qres.2001.2219 |
container_title |
Quaternary Research |
container_volume |
55 |
container_issue |
3 |
container_start_page |
313 |
op_container_end_page |
321 |
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1801374209461452800 |