Holocene atmospheric circulation in the central North Pacific: a new terrestrial diatom and δ18O dataset from the Aleutian Islands
The North Pacific is a zone of cyclogenesis that modulates synoptic-scale atmospheric circulation, yet there is a paucity of instrumental and paleoclimate data to fully constrain its long-term state and variability. We present the first Holocene oxygen isotope record (d18Odiatom) from the Aleutian I...
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2018
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Online Access: | https://epic.awi.de/id/eprint/47987/ https://epic.awi.de/id/eprint/47987/1/113_Bailey_2018_QSR.pdf https://doi.org/10.1016/j.quascirev.2018.06.027 https://hdl.handle.net/10013/epic.6d58a521-964d-43c6-8c2f-89a6a8497497 |
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ftawi:oai:epic.awi.de:47987 2024-09-15T17:36:30+00:00 Holocene atmospheric circulation in the central North Pacific: a new terrestrial diatom and δ18O dataset from the Aleutian Islands Bailey, Hannah Kaufman, Darrell S. Sloane, H. J. Hubbart, A. L. Henderson, A. C. G. Leng, M. J. Meyer, Hanno Welker, J. M. 2018 application/pdf https://epic.awi.de/id/eprint/47987/ https://epic.awi.de/id/eprint/47987/1/113_Bailey_2018_QSR.pdf https://doi.org/10.1016/j.quascirev.2018.06.027 https://hdl.handle.net/10013/epic.6d58a521-964d-43c6-8c2f-89a6a8497497 unknown PERGAMON-ELSEVIER SCIENCE LTD https://epic.awi.de/id/eprint/47987/1/113_Bailey_2018_QSR.pdf Bailey, H. , Kaufman, D. S. , Sloane, H. J. , Hubbart, A. L. , Henderson, A. C. G. , Leng, M. J. , Meyer, H. orcid:0000-0003-4129-4706 and Welker, J. M. (2018) Holocene atmospheric circulation in the central North Pacific: a new terrestrial diatom and δ18O dataset from the Aleutian Islands , Quaternary Science Reviews, (194), pp. 27-38 . doi:10.1016/j.quascirev.2018.06.027 <https://doi.org/10.1016/j.quascirev.2018.06.027> , hdl:10013/epic.6d58a521-964d-43c6-8c2f-89a6a8497497 EPIC3Quaternary Science Reviews, PERGAMON-ELSEVIER SCIENCE LTD, (194), pp. 27-38, ISSN: 0277-3791 Article isiRev 2018 ftawi https://doi.org/10.1016/j.quascirev.2018.06.027 2024-06-24T04:21:00Z The North Pacific is a zone of cyclogenesis that modulates synoptic-scale atmospheric circulation, yet there is a paucity of instrumental and paleoclimate data to fully constrain its long-term state and variability. We present the first Holocene oxygen isotope record (d18Odiatom) from the Aleutian Islands, using siliceous diatoms preserved in Heart Lake on Adak Island (51.85° N, 176.69° W). This study builds on previous work demonstrating that Heart Lake sedimentary d18Odiatom values record the d18O signal of precipitation, and correlate significantly with atmospheric circulation indices over the past century. We apply this empirical relationship to interpret a new 9.6 ka d18Odiatom record from the same lake, supported by diatom assemblage analysis. Our results demonstrate distinct shifts in the prevailing trajectory of storm systems that drove spatially heterogeneous patterns of moisture delivery and climate across the region. During the early-mid Holocene, a warmer/wetter climate prevailed due to a predominantly westerly Aleutian Low that enhanced advection of warm 18O-enriched Pacific moisture to Adak, and culminated in a d18Odiatom maxima (33.3‰) at 7.6 ka during the Holocene Thermal Maximum. After 4.5 ka, relatively lower d18Odiatom indicates cooler/drier conditions associated with enhanced northerly circulation that persisted into the 21st century. Our analysis is consistent with surface climate conditions inferred from a suite of terrestrial and marine climate-proxy records. This new Holocene dataset bridges the gap in an expanding regional network of paleoisotope studies, and provides a fresh assessment of the complex spatial patterns of Holocene climate across Beringia and the atmospheric forces driving them. Article in Journal/Newspaper aleutian low Aleutian Islands Beringia Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Quaternary Science Reviews 194 27 38 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The North Pacific is a zone of cyclogenesis that modulates synoptic-scale atmospheric circulation, yet there is a paucity of instrumental and paleoclimate data to fully constrain its long-term state and variability. We present the first Holocene oxygen isotope record (d18Odiatom) from the Aleutian Islands, using siliceous diatoms preserved in Heart Lake on Adak Island (51.85° N, 176.69° W). This study builds on previous work demonstrating that Heart Lake sedimentary d18Odiatom values record the d18O signal of precipitation, and correlate significantly with atmospheric circulation indices over the past century. We apply this empirical relationship to interpret a new 9.6 ka d18Odiatom record from the same lake, supported by diatom assemblage analysis. Our results demonstrate distinct shifts in the prevailing trajectory of storm systems that drove spatially heterogeneous patterns of moisture delivery and climate across the region. During the early-mid Holocene, a warmer/wetter climate prevailed due to a predominantly westerly Aleutian Low that enhanced advection of warm 18O-enriched Pacific moisture to Adak, and culminated in a d18Odiatom maxima (33.3‰) at 7.6 ka during the Holocene Thermal Maximum. After 4.5 ka, relatively lower d18Odiatom indicates cooler/drier conditions associated with enhanced northerly circulation that persisted into the 21st century. Our analysis is consistent with surface climate conditions inferred from a suite of terrestrial and marine climate-proxy records. This new Holocene dataset bridges the gap in an expanding regional network of paleoisotope studies, and provides a fresh assessment of the complex spatial patterns of Holocene climate across Beringia and the atmospheric forces driving them. |
format |
Article in Journal/Newspaper |
author |
Bailey, Hannah Kaufman, Darrell S. Sloane, H. J. Hubbart, A. L. Henderson, A. C. G. Leng, M. J. Meyer, Hanno Welker, J. M. |
spellingShingle |
Bailey, Hannah Kaufman, Darrell S. Sloane, H. J. Hubbart, A. L. Henderson, A. C. G. Leng, M. J. Meyer, Hanno Welker, J. M. Holocene atmospheric circulation in the central North Pacific: a new terrestrial diatom and δ18O dataset from the Aleutian Islands |
author_facet |
Bailey, Hannah Kaufman, Darrell S. Sloane, H. J. Hubbart, A. L. Henderson, A. C. G. Leng, M. J. Meyer, Hanno Welker, J. M. |
author_sort |
Bailey, Hannah |
title |
Holocene atmospheric circulation in the central North Pacific: a new terrestrial diatom and δ18O dataset from the Aleutian Islands |
title_short |
Holocene atmospheric circulation in the central North Pacific: a new terrestrial diatom and δ18O dataset from the Aleutian Islands |
title_full |
Holocene atmospheric circulation in the central North Pacific: a new terrestrial diatom and δ18O dataset from the Aleutian Islands |
title_fullStr |
Holocene atmospheric circulation in the central North Pacific: a new terrestrial diatom and δ18O dataset from the Aleutian Islands |
title_full_unstemmed |
Holocene atmospheric circulation in the central North Pacific: a new terrestrial diatom and δ18O dataset from the Aleutian Islands |
title_sort |
holocene atmospheric circulation in the central north pacific: a new terrestrial diatom and δ18o dataset from the aleutian islands |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/47987/ https://epic.awi.de/id/eprint/47987/1/113_Bailey_2018_QSR.pdf https://doi.org/10.1016/j.quascirev.2018.06.027 https://hdl.handle.net/10013/epic.6d58a521-964d-43c6-8c2f-89a6a8497497 |
genre |
aleutian low Aleutian Islands Beringia |
genre_facet |
aleutian low Aleutian Islands Beringia |
op_source |
EPIC3Quaternary Science Reviews, PERGAMON-ELSEVIER SCIENCE LTD, (194), pp. 27-38, ISSN: 0277-3791 |
op_relation |
https://epic.awi.de/id/eprint/47987/1/113_Bailey_2018_QSR.pdf Bailey, H. , Kaufman, D. S. , Sloane, H. J. , Hubbart, A. L. , Henderson, A. C. G. , Leng, M. J. , Meyer, H. orcid:0000-0003-4129-4706 and Welker, J. M. (2018) Holocene atmospheric circulation in the central North Pacific: a new terrestrial diatom and δ18O dataset from the Aleutian Islands , Quaternary Science Reviews, (194), pp. 27-38 . doi:10.1016/j.quascirev.2018.06.027 <https://doi.org/10.1016/j.quascirev.2018.06.027> , hdl:10013/epic.6d58a521-964d-43c6-8c2f-89a6a8497497 |
op_doi |
https://doi.org/10.1016/j.quascirev.2018.06.027 |
container_title |
Quaternary Science Reviews |
container_volume |
194 |
container_start_page |
27 |
op_container_end_page |
38 |
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