Reorganized atmospheric circulation during the little ice age leads to rapid Southern California deoxygenation
Author Posting. © American Geophysical Union, 2021. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 48(15), (2021): e2021GL094469, https://doi.org/10.1029/2021GL0944...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/27751 2023-05-15T13:15:01+02:00 Reorganized atmospheric circulation during the little ice age leads to rapid Southern California deoxygenation Wang, Yi Hendy, Ingrid 2021-07-16 https://hdl.handle.net/1912/27751 unknown American Geophysical Union https://doi.org/10.1029/2021GL094469 Wang, Y., & Hendy, I. L. (2021). Reorganized atmospheric circulation during the little ice age leads to rapid Southern California deoxygenation. Geophysical Research Letters, 48(15), e2021GL094469. https://hdl.handle.net/1912/27751 doi:10.1029/2021GL094469 Wang, Y., & Hendy, I. L. (2021). Reorganized atmospheric circulation during the little ice age leads to rapid Southern California deoxygenation. Geophysical Research Letters, 48(15), e2021GL094469. doi:10.1029/2021GL094469 Southern California Oxygen minimum zone Atmospheric circulation North Pacific Intermediate Water Ventilation Article 2021 ftwhoas https://doi.org/10.1029/2021GL094469 2022-10-29T22:57:24Z Author Posting. © American Geophysical Union, 2021. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 48(15), (2021): e2021GL094469, https://doi.org/10.1029/2021GL094469. The magnitude of natural oceanic dissolved oxygen (DO) variability remains poorly understood due to the short duration of the observational record. Here we present a high-resolution (4–9 years) reconstruction of the Southern California oxygen minimum zone (OMZ) through the Common Era using redox-sensitive metals. Rapid OMZ intensification on multidecadal timescales reveals greater DO variability than observed in instrumental records. An anomalous interval of intensified OMZ between 1600–1750 CE contradicts the expectation of better-ventilated mid-depth North Pacific during cool climates. Although the influence of low-DO Equatorial Pacific Intermediate Water on the Southern California Margin was likely weaker during this interval, we attribute the observed rapid deoxygenation to reduced North Pacific Intermediate Water (NPIW) ventilation. NPIW ventilation thus appears very sensitive to atmospheric circulation reorganization (e.g., a weakened Siberian High and Aleutian Low). In addition to temperature-induced gas solubility, atmospheric forcing under future anthropogenic influences could amplify OMZ variability. The authors are grateful for financial supports from NSF (OCE-1851242), SMAST, and UMass Dartmouth. GG was supported by NSF under grants OCE-1657853 and OCE-1558521. 2022-01-16 Article in Journal/Newspaper aleutian low Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Pacific Geophysical Research Letters 48 15 |
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Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
unknown |
topic |
Southern California Oxygen minimum zone Atmospheric circulation North Pacific Intermediate Water Ventilation |
spellingShingle |
Southern California Oxygen minimum zone Atmospheric circulation North Pacific Intermediate Water Ventilation Wang, Yi Hendy, Ingrid Reorganized atmospheric circulation during the little ice age leads to rapid Southern California deoxygenation |
topic_facet |
Southern California Oxygen minimum zone Atmospheric circulation North Pacific Intermediate Water Ventilation |
description |
Author Posting. © American Geophysical Union, 2021. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 48(15), (2021): e2021GL094469, https://doi.org/10.1029/2021GL094469. The magnitude of natural oceanic dissolved oxygen (DO) variability remains poorly understood due to the short duration of the observational record. Here we present a high-resolution (4–9 years) reconstruction of the Southern California oxygen minimum zone (OMZ) through the Common Era using redox-sensitive metals. Rapid OMZ intensification on multidecadal timescales reveals greater DO variability than observed in instrumental records. An anomalous interval of intensified OMZ between 1600–1750 CE contradicts the expectation of better-ventilated mid-depth North Pacific during cool climates. Although the influence of low-DO Equatorial Pacific Intermediate Water on the Southern California Margin was likely weaker during this interval, we attribute the observed rapid deoxygenation to reduced North Pacific Intermediate Water (NPIW) ventilation. NPIW ventilation thus appears very sensitive to atmospheric circulation reorganization (e.g., a weakened Siberian High and Aleutian Low). In addition to temperature-induced gas solubility, atmospheric forcing under future anthropogenic influences could amplify OMZ variability. The authors are grateful for financial supports from NSF (OCE-1851242), SMAST, and UMass Dartmouth. GG was supported by NSF under grants OCE-1657853 and OCE-1558521. 2022-01-16 |
format |
Article in Journal/Newspaper |
author |
Wang, Yi Hendy, Ingrid |
author_facet |
Wang, Yi Hendy, Ingrid |
author_sort |
Wang, Yi |
title |
Reorganized atmospheric circulation during the little ice age leads to rapid Southern California deoxygenation |
title_short |
Reorganized atmospheric circulation during the little ice age leads to rapid Southern California deoxygenation |
title_full |
Reorganized atmospheric circulation during the little ice age leads to rapid Southern California deoxygenation |
title_fullStr |
Reorganized atmospheric circulation during the little ice age leads to rapid Southern California deoxygenation |
title_full_unstemmed |
Reorganized atmospheric circulation during the little ice age leads to rapid Southern California deoxygenation |
title_sort |
reorganized atmospheric circulation during the little ice age leads to rapid southern california deoxygenation |
publisher |
American Geophysical Union |
publishDate |
2021 |
url |
https://hdl.handle.net/1912/27751 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
aleutian low |
genre_facet |
aleutian low |
op_source |
Wang, Y., & Hendy, I. L. (2021). Reorganized atmospheric circulation during the little ice age leads to rapid Southern California deoxygenation. Geophysical Research Letters, 48(15), e2021GL094469. doi:10.1029/2021GL094469 |
op_relation |
https://doi.org/10.1029/2021GL094469 Wang, Y., & Hendy, I. L. (2021). Reorganized atmospheric circulation during the little ice age leads to rapid Southern California deoxygenation. Geophysical Research Letters, 48(15), e2021GL094469. https://hdl.handle.net/1912/27751 doi:10.1029/2021GL094469 |
op_doi |
https://doi.org/10.1029/2021GL094469 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
15 |
_version_ |
1766266580508868608 |