Celestial Mechanics and Estimating the Termination of the Holocene
This paper addresses several issues concerning Milankovitch Theory and its relationship to paleoclimate data over the last 800,000 years. A model is presented that deconvolutes the precession index (precession modulated by the eccentricity) and the obliquity contributions to the percentage change be...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00061895 2023-05-15T16:06:18+02:00 Celestial Mechanics and Estimating the Termination of the Holocene Parmentola, John Abele 2022-07 electronic https://doi.org/10.5194/egusphere-2022-569 https://noa.gwlb.de/receive/cop_mods_00061895 https://egusphere.copernicus.org/preprints/egusphere-2022-569/egusphere-2022-569.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2022-569 https://noa.gwlb.de/receive/cop_mods_00061895 https://egusphere.copernicus.org/preprints/egusphere-2022-569/egusphere-2022-569.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/restrictedAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2022 ftnonlinearchiv https://doi.org/10.5194/egusphere-2022-569 2022-07-31T23:11:44Z This paper addresses several issues concerning Milankovitch Theory and its relationship to paleoclimate data over the last 800,000 years. A model is presented that deconvolutes the precession index (precession modulated by the eccentricity) and the obliquity contributions to the percentage change between successive mean-daily-insolation minima and maxima. The sum of these contributions is in close agreement with the corresponding benchmark calculation of J. Laskar et al. The model predictions indicate that the precession index contribution dominates such insolation changes, and its time-dependent behavior correlates with the occurrence of interglacial and glacial periods and temperature trends during these periods. Best fit curves to the separate contributions appear as quasiperiodic waves that correlate with interglacial initiations and terminations through their constructive and destructive interference. However, a comparison of model predictions with the EPICA Dome C (EDC) data indicates delayed inceptions for Marine Isotope Stages 18d and 13c, which have also been noted by Parrenin et al. through a comparison of LR04 benthic δ18O and EDC ice core datasets. Finally, the model enables the classification of interglacial periods into two distinct types that approximately account for their durations. This classification also enables a low-resolution estimation of the Holocene termination based solely on celestial mechanical forcing. Article in Journal/Newspaper EPICA ice core Niedersächsisches Online-Archiv NOA |
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article Verlagsveröffentlichung Parmentola, John Abele Celestial Mechanics and Estimating the Termination of the Holocene |
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article Verlagsveröffentlichung |
description |
This paper addresses several issues concerning Milankovitch Theory and its relationship to paleoclimate data over the last 800,000 years. A model is presented that deconvolutes the precession index (precession modulated by the eccentricity) and the obliquity contributions to the percentage change between successive mean-daily-insolation minima and maxima. The sum of these contributions is in close agreement with the corresponding benchmark calculation of J. Laskar et al. The model predictions indicate that the precession index contribution dominates such insolation changes, and its time-dependent behavior correlates with the occurrence of interglacial and glacial periods and temperature trends during these periods. Best fit curves to the separate contributions appear as quasiperiodic waves that correlate with interglacial initiations and terminations through their constructive and destructive interference. However, a comparison of model predictions with the EPICA Dome C (EDC) data indicates delayed inceptions for Marine Isotope Stages 18d and 13c, which have also been noted by Parrenin et al. through a comparison of LR04 benthic δ18O and EDC ice core datasets. Finally, the model enables the classification of interglacial periods into two distinct types that approximately account for their durations. This classification also enables a low-resolution estimation of the Holocene termination based solely on celestial mechanical forcing. |
format |
Article in Journal/Newspaper |
author |
Parmentola, John Abele |
author_facet |
Parmentola, John Abele |
author_sort |
Parmentola, John Abele |
title |
Celestial Mechanics and Estimating the Termination of the Holocene |
title_short |
Celestial Mechanics and Estimating the Termination of the Holocene |
title_full |
Celestial Mechanics and Estimating the Termination of the Holocene |
title_fullStr |
Celestial Mechanics and Estimating the Termination of the Holocene |
title_full_unstemmed |
Celestial Mechanics and Estimating the Termination of the Holocene |
title_sort |
celestial mechanics and estimating the termination of the holocene |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/egusphere-2022-569 https://noa.gwlb.de/receive/cop_mods_00061895 https://egusphere.copernicus.org/preprints/egusphere-2022-569/egusphere-2022-569.pdf |
genre |
EPICA ice core |
genre_facet |
EPICA ice core |
op_relation |
https://doi.org/10.5194/egusphere-2022-569 https://noa.gwlb.de/receive/cop_mods_00061895 https://egusphere.copernicus.org/preprints/egusphere-2022-569/egusphere-2022-569.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/restrictedAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/egusphere-2022-569 |
_version_ |
1766402195006160896 |