Orbital forcings of the Earth’s climate in wavelet domain
We examine two paleoclimate proxy records – the temperature differences from the Antarctic Vostok ice core and the composite δ 18 O record from three sites (V19-30, ODP 677, and ODP 846) – in order to search for indications of orbital forcings. We demonstrate that the non-decimated wavelet transform...
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ftcopernicus:oai:publications.copernicus.org:cpd6197 2023-05-15T13:36:36+02:00 Orbital forcings of the Earth’s climate in wavelet domain Glushkov, A. V. Khokhlov, V. N. Loboda, N. S. Rusov, V. D. Vaschenko, V. N. 2018-09-26 application/pdf https://doi.org/10.5194/cpd-1-193-2005 https://cp.copernicus.org/preprints/cpd-2005-0009/ eng eng doi:10.5194/cpd-1-193-2005 https://cp.copernicus.org/preprints/cpd-2005-0009/ eISSN: 1814-9332 Text 2018 ftcopernicus https://doi.org/10.5194/cpd-1-193-2005 2020-07-20T16:27:24Z We examine two paleoclimate proxy records – the temperature differences from the Antarctic Vostok ice core and the composite δ 18 O record from three sites (V19-30, ODP 677, and ODP 846) – in order to search for indications of orbital forcings. We demonstrate that the non-decimated wavelet transform is an appropriate tool for investigating temporarily changing spectral properties of records. Our results indicate that abrupt climate warmings with cyclicity of ~100 kiloyears during the last 400 kiloyears were caused by the combined unidirectional influences of three orbital parameters and the eccentricity can be considered as a modulator defining transitions from the Ice Ages to the periods of comparative warmings. Non-decimated wavelet transform avails discovering the possible part played in climate change by the eccentricity-forced variations. Up to approximately 1.7 million years BP, the influence of this variations of eccentricity appears in increasing for almost all local maxima of δ 18 O. Since the ~1.7 million years BP, minor and significant maxima alternated and this not affected as much the variations of δ 18 O. Text Antarc* Antarctic ice core Copernicus Publications: E-Journals Antarctic The Antarctic |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
We examine two paleoclimate proxy records – the temperature differences from the Antarctic Vostok ice core and the composite δ 18 O record from three sites (V19-30, ODP 677, and ODP 846) – in order to search for indications of orbital forcings. We demonstrate that the non-decimated wavelet transform is an appropriate tool for investigating temporarily changing spectral properties of records. Our results indicate that abrupt climate warmings with cyclicity of ~100 kiloyears during the last 400 kiloyears were caused by the combined unidirectional influences of three orbital parameters and the eccentricity can be considered as a modulator defining transitions from the Ice Ages to the periods of comparative warmings. Non-decimated wavelet transform avails discovering the possible part played in climate change by the eccentricity-forced variations. Up to approximately 1.7 million years BP, the influence of this variations of eccentricity appears in increasing for almost all local maxima of δ 18 O. Since the ~1.7 million years BP, minor and significant maxima alternated and this not affected as much the variations of δ 18 O. |
format |
Text |
author |
Glushkov, A. V. Khokhlov, V. N. Loboda, N. S. Rusov, V. D. Vaschenko, V. N. |
spellingShingle |
Glushkov, A. V. Khokhlov, V. N. Loboda, N. S. Rusov, V. D. Vaschenko, V. N. Orbital forcings of the Earth’s climate in wavelet domain |
author_facet |
Glushkov, A. V. Khokhlov, V. N. Loboda, N. S. Rusov, V. D. Vaschenko, V. N. |
author_sort |
Glushkov, A. V. |
title |
Orbital forcings of the Earth’s climate in wavelet domain |
title_short |
Orbital forcings of the Earth’s climate in wavelet domain |
title_full |
Orbital forcings of the Earth’s climate in wavelet domain |
title_fullStr |
Orbital forcings of the Earth’s climate in wavelet domain |
title_full_unstemmed |
Orbital forcings of the Earth’s climate in wavelet domain |
title_sort |
orbital forcings of the earth’s climate in wavelet domain |
publishDate |
2018 |
url |
https://doi.org/10.5194/cpd-1-193-2005 https://cp.copernicus.org/preprints/cpd-2005-0009/ |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic ice core |
genre_facet |
Antarc* Antarctic ice core |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cpd-1-193-2005 https://cp.copernicus.org/preprints/cpd-2005-0009/ |
op_doi |
https://doi.org/10.5194/cpd-1-193-2005 |
_version_ |
1766081572602118144 |