Holocene atmospheric circulation in the central North Pacific: A new terrestrial diatom and d18O dataset from the Aleutian Islands
Accepted manuscript version. Published version available at https://doi.org/10.1016/j.quascirev.2018.06.027 . Accepted manuscript version, licensed CC BY-NC-ND 4.0. The North Pacific is a zone of cyclogenesis that modulates synoptic-scale atmospheric circulation, yet there is a paucity of instrument...
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ftunivtroemsoe:oai:munin.uit.no:10037/13385 2023-05-15T13:15:07+02:00 Holocene atmospheric circulation in the central North Pacific: A new terrestrial diatom and d18O dataset from the Aleutian Islands Bailey, Hannah L. Kaufman, Darrell S. Sloane, Hilary J. Hubbard, Alun Lloyd Henderson, Andrew C.G. Leng, Melanie J. Meyer, Hanno Welker, Jeffrey M. 2018-07-02 https://hdl.handle.net/10037/13385 https://doi.org/10.1016/j.quascirev.2018.06.027 eng eng Elsevier Quaternary Science Reviews info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Bailey, H.L., Kaufman, D.S., Sloane, H.J., Hubbard, A.L., Henderson, A.C.G., Leng, M.J., . Welker, J.M. (2018). Holocene atmospheric circulation in the central North Pacific: A newterrestrial diatom and δ18O dataset from the Aleutian Islands. Quaternary Science Reviews, 194, 27-38. https://doi.org/10.1016/j.quascirev.2018.06.027 FRIDAID 1595345 doi:10.1016/j.quascirev.2018.06.027 0277-3791 1873-457X https://hdl.handle.net/10037/13385 openAccess VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 Holocene Paleoclimate North Pacific Limnology Stable isotopes Diatoms Journal article Tidsskriftartikkel Peer reviewed 2018 ftunivtroemsoe https://doi.org/10.1016/j.quascirev.2018.06.027 2021-06-25T17:56:00Z Accepted manuscript version. Published version available at https://doi.org/10.1016/j.quascirev.2018.06.027 . Accepted manuscript version, licensed CC BY-NC-ND 4.0. 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 (δ 18 O diatom ) 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 δ 18 O diatom values record the δ 18 O 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 δ 18 O diatom 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 δ 18 O diatom maxima (33.3‰) at 7.6 ka during the Holocene Thermal Maximum. After 4.5 ka, relatively lower δ 18 O diatom 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 Arctic Aleutian Islands Beringia University of Tromsø: Munin Open Research Archive Adak ENVELOPE(59.561,59.561,66.502,66.502) Heart Lake ENVELOPE(166.233,166.233,-77.567,-77.567) Pacific Quaternary Science Reviews 194 27 38 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 Holocene Paleoclimate North Pacific Limnology Stable isotopes Diatoms |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 Holocene Paleoclimate North Pacific Limnology Stable isotopes Diatoms Bailey, Hannah L. Kaufman, Darrell S. Sloane, Hilary J. Hubbard, Alun Lloyd Henderson, Andrew C.G. Leng, Melanie J. Meyer, Hanno Welker, Jeffrey M. Holocene atmospheric circulation in the central North Pacific: A new terrestrial diatom and d18O dataset from the Aleutian Islands |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 Holocene Paleoclimate North Pacific Limnology Stable isotopes Diatoms |
description |
Accepted manuscript version. Published version available at https://doi.org/10.1016/j.quascirev.2018.06.027 . Accepted manuscript version, licensed CC BY-NC-ND 4.0. 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 (δ 18 O diatom ) 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 δ 18 O diatom values record the δ 18 O 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 δ 18 O diatom 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 δ 18 O diatom maxima (33.3‰) at 7.6 ka during the Holocene Thermal Maximum. After 4.5 ka, relatively lower δ 18 O diatom 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 L. Kaufman, Darrell S. Sloane, Hilary J. Hubbard, Alun Lloyd Henderson, Andrew C.G. Leng, Melanie J. Meyer, Hanno Welker, Jeffrey M. |
author_facet |
Bailey, Hannah L. Kaufman, Darrell S. Sloane, Hilary J. Hubbard, Alun Lloyd Henderson, Andrew C.G. Leng, Melanie J. Meyer, Hanno Welker, Jeffrey M. |
author_sort |
Bailey, Hannah L. |
title |
Holocene atmospheric circulation in the central North Pacific: A new terrestrial diatom and d18O dataset from the Aleutian Islands |
title_short |
Holocene atmospheric circulation in the central North Pacific: A new terrestrial diatom and d18O dataset from the Aleutian Islands |
title_full |
Holocene atmospheric circulation in the central North Pacific: A new terrestrial diatom and d18O dataset from the Aleutian Islands |
title_fullStr |
Holocene atmospheric circulation in the central North Pacific: A new terrestrial diatom and d18O dataset from the Aleutian Islands |
title_full_unstemmed |
Holocene atmospheric circulation in the central North Pacific: A new terrestrial diatom and d18O dataset from the Aleutian Islands |
title_sort |
holocene atmospheric circulation in the central north pacific: a new terrestrial diatom and d18o dataset from the aleutian islands |
publisher |
Elsevier |
publishDate |
2018 |
url |
https://hdl.handle.net/10037/13385 https://doi.org/10.1016/j.quascirev.2018.06.027 |
long_lat |
ENVELOPE(59.561,59.561,66.502,66.502) ENVELOPE(166.233,166.233,-77.567,-77.567) |
geographic |
Adak Heart Lake Pacific |
geographic_facet |
Adak Heart Lake Pacific |
genre |
aleutian low Arctic Aleutian Islands Beringia |
genre_facet |
aleutian low Arctic Aleutian Islands Beringia |
op_relation |
Quaternary Science Reviews info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Bailey, H.L., Kaufman, D.S., Sloane, H.J., Hubbard, A.L., Henderson, A.C.G., Leng, M.J., . Welker, J.M. (2018). Holocene atmospheric circulation in the central North Pacific: A newterrestrial diatom and δ18O dataset from the Aleutian Islands. Quaternary Science Reviews, 194, 27-38. https://doi.org/10.1016/j.quascirev.2018.06.027 FRIDAID 1595345 doi:10.1016/j.quascirev.2018.06.027 0277-3791 1873-457X https://hdl.handle.net/10037/13385 |
op_rights |
openAccess |
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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1766267047859191808 |