The Antarctic Centennial Oscillation: A Natural Paleoclimate Cycle in the Southern Hemisphere That Influences Global Temperature
We report a previously-unexplored natural temperature cycle recorded in ice cores from Antarctica—the Antarctic Centennial Oscillation (ACO)—that has oscillated for at least the last 226 millennia. Here we document the properties of the ACO and provide an initial assessment of its role in global cli...
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ftdoajarticles:oai:doaj.org/article:97fffb589e9e42e2b9d41d6380b87543 2023-05-15T13:52:04+02:00 The Antarctic Centennial Oscillation: A Natural Paleoclimate Cycle in the Southern Hemisphere That Influences Global Temperature W. Jackson Davis Peter J. Taylor W. Barton Davis 2018-01-01T00:00:00Z https://doi.org/10.3390/cli6010003 https://doaj.org/article/97fffb589e9e42e2b9d41d6380b87543 EN eng MDPI AG http://www.mdpi.com/2225-1154/6/1/3 https://doaj.org/toc/2225-1154 2225-1154 doi:10.3390/cli6010003 https://doaj.org/article/97fffb589e9e42e2b9d41d6380b87543 Climate, Vol 6, Iss 1, p 3 (2018) Antarctic Oscillation Southern Annular Mode Antarctic Isotope Maxima Dansgaard-Oeschger oscillations ice cores paleoclimate Holocene AICC2012 Vostok anthropogenic global warming Science Q article 2018 ftdoajarticles https://doi.org/10.3390/cli6010003 2022-12-31T00:06:44Z We report a previously-unexplored natural temperature cycle recorded in ice cores from Antarctica—the Antarctic Centennial Oscillation (ACO)—that has oscillated for at least the last 226 millennia. Here we document the properties of the ACO and provide an initial assessment of its role in global climate. We analyzed open-source databases of stable isotopes of oxygen and hydrogen as proxies for paleo-temperatures. We find that centennial-scale spectral peaks from temperature-proxy records at Vostok over the last 10,000 years occur at the same frequencies (±2.4%) in three other paleoclimate records from drill sites distributed widely across the East Antarctic Plateau (EAP), and >98% of individual ACOs evaluated at Vostok match 1:1 with homologous cycles at the other three EAP drill sites and conversely. Identified ACOs summate with millennial periodicity to form the Antarctic Isotope Maxima (AIMs) known to precede Dansgaard-Oeschger (D-O) oscillations recorded in Greenland ice cores. Homologous ACOs recorded at the four EAP drill sites during the last glacial maximum appeared first at lower elevations nearest the ocean and centuries later on the high EAP, with latencies that exceed dating uncertainty >30-fold. ACO homologs at different drill sites became synchronous, however, during the warmer Holocene. Comparative spectral analysis suggests that the millennial-scale AIM cycle declined in period from 1500 to 800 years over the last 70 millennia. Similarly, over the last 226 millennia ACO repetition period (mean 352 years) declined by half while amplitude (mean 0.67 °C) approximately doubled. The period and amplitude of ACOs oscillate in phase with glacial cycles and related surface insolation associated with planetary orbital forces. We conclude that the ACO: encompasses at least the EAP; is the proximate source of D-O oscillations in the Northern Hemisphere; therefore affects global temperature; propagates with increased velocity as temperature increases; doubled in intensity over geologic time; is ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Greenland Greenland ice cores Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Greenland Climate 6 1 3 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic Oscillation Southern Annular Mode Antarctic Isotope Maxima Dansgaard-Oeschger oscillations ice cores paleoclimate Holocene AICC2012 Vostok anthropogenic global warming Science Q |
spellingShingle |
Antarctic Oscillation Southern Annular Mode Antarctic Isotope Maxima Dansgaard-Oeschger oscillations ice cores paleoclimate Holocene AICC2012 Vostok anthropogenic global warming Science Q W. Jackson Davis Peter J. Taylor W. Barton Davis The Antarctic Centennial Oscillation: A Natural Paleoclimate Cycle in the Southern Hemisphere That Influences Global Temperature |
topic_facet |
Antarctic Oscillation Southern Annular Mode Antarctic Isotope Maxima Dansgaard-Oeschger oscillations ice cores paleoclimate Holocene AICC2012 Vostok anthropogenic global warming Science Q |
description |
We report a previously-unexplored natural temperature cycle recorded in ice cores from Antarctica—the Antarctic Centennial Oscillation (ACO)—that has oscillated for at least the last 226 millennia. Here we document the properties of the ACO and provide an initial assessment of its role in global climate. We analyzed open-source databases of stable isotopes of oxygen and hydrogen as proxies for paleo-temperatures. We find that centennial-scale spectral peaks from temperature-proxy records at Vostok over the last 10,000 years occur at the same frequencies (±2.4%) in three other paleoclimate records from drill sites distributed widely across the East Antarctic Plateau (EAP), and >98% of individual ACOs evaluated at Vostok match 1:1 with homologous cycles at the other three EAP drill sites and conversely. Identified ACOs summate with millennial periodicity to form the Antarctic Isotope Maxima (AIMs) known to precede Dansgaard-Oeschger (D-O) oscillations recorded in Greenland ice cores. Homologous ACOs recorded at the four EAP drill sites during the last glacial maximum appeared first at lower elevations nearest the ocean and centuries later on the high EAP, with latencies that exceed dating uncertainty >30-fold. ACO homologs at different drill sites became synchronous, however, during the warmer Holocene. Comparative spectral analysis suggests that the millennial-scale AIM cycle declined in period from 1500 to 800 years over the last 70 millennia. Similarly, over the last 226 millennia ACO repetition period (mean 352 years) declined by half while amplitude (mean 0.67 °C) approximately doubled. The period and amplitude of ACOs oscillate in phase with glacial cycles and related surface insolation associated with planetary orbital forces. We conclude that the ACO: encompasses at least the EAP; is the proximate source of D-O oscillations in the Northern Hemisphere; therefore affects global temperature; propagates with increased velocity as temperature increases; doubled in intensity over geologic time; is ... |
format |
Article in Journal/Newspaper |
author |
W. Jackson Davis Peter J. Taylor W. Barton Davis |
author_facet |
W. Jackson Davis Peter J. Taylor W. Barton Davis |
author_sort |
W. Jackson Davis |
title |
The Antarctic Centennial Oscillation: A Natural Paleoclimate Cycle in the Southern Hemisphere That Influences Global Temperature |
title_short |
The Antarctic Centennial Oscillation: A Natural Paleoclimate Cycle in the Southern Hemisphere That Influences Global Temperature |
title_full |
The Antarctic Centennial Oscillation: A Natural Paleoclimate Cycle in the Southern Hemisphere That Influences Global Temperature |
title_fullStr |
The Antarctic Centennial Oscillation: A Natural Paleoclimate Cycle in the Southern Hemisphere That Influences Global Temperature |
title_full_unstemmed |
The Antarctic Centennial Oscillation: A Natural Paleoclimate Cycle in the Southern Hemisphere That Influences Global Temperature |
title_sort |
antarctic centennial oscillation: a natural paleoclimate cycle in the southern hemisphere that influences global temperature |
publisher |
MDPI AG |
publishDate |
2018 |
url |
https://doi.org/10.3390/cli6010003 https://doaj.org/article/97fffb589e9e42e2b9d41d6380b87543 |
geographic |
Antarctic The Antarctic Greenland |
geographic_facet |
Antarctic The Antarctic Greenland |
genre |
Antarc* Antarctic Antarctica Greenland Greenland ice cores |
genre_facet |
Antarc* Antarctic Antarctica Greenland Greenland ice cores |
op_source |
Climate, Vol 6, Iss 1, p 3 (2018) |
op_relation |
http://www.mdpi.com/2225-1154/6/1/3 https://doaj.org/toc/2225-1154 2225-1154 doi:10.3390/cli6010003 https://doaj.org/article/97fffb589e9e42e2b9d41d6380b87543 |
op_doi |
https://doi.org/10.3390/cli6010003 |
container_title |
Climate |
container_volume |
6 |
container_issue |
1 |
container_start_page |
3 |
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1766256297923051520 |