Stable oxygen isotope ratios of benthic foraminifera from sediment core RC13-110 (Table 1)
The Milankovitch theory of climate change predicts that variations of the climate system should match the dominant frequencies of the orbital forcing in the 41 and 23 kyr**-1 frequency bands. Such a linear theory would predict that the amplitude variations of the climate response in these bands shou...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.55386 2024-09-15T18:35:39+00:00 Stable oxygen isotope ratios of benthic foraminifera from sediment core RC13-110 (Table 1) Pisias, Nicklas G Mix, Alan C Zahn, Rainer LATITUDE: -0.097000 * LONGITUDE: -95.650000 * DATE/TIME START: 1970-04-26T00:00:00 * DATE/TIME END: 1970-04-26T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.01 m * MAXIMUM DEPTH, sediment/rock: 15.44 m 1990 text/tab-separated-values, 296 data points https://doi.pangaea.de/10.1594/PANGAEA.55386 https://doi.org/10.1594/PANGAEA.55386 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.55386 https://doi.org/10.1594/PANGAEA.55386 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Pisias, Nicklas G; Mix, Alan C; Zahn, Rainer (1990): Nonlinear response in the global climate system: evidence from benthic oxygen isotopic record in core RC13-110. Paleoceanography, 5(2), 147-160, https://doi.org/10.1029/PA005i002p00147 AGE Cibicides sp. δ18O DEPTH sediment/rock Lamont-Doherty Earth Observatory Columbia University LDEO Mass spectrometer Finnigan MAT 251 PC Piston corer RC13 RC13-110 Robert Conrad Uvigerina sp. dataset 1990 ftpangaea https://doi.org/10.1594/PANGAEA.5538610.1029/PA005i002p00147 2024-07-24T02:31:21Z The Milankovitch theory of climate change predicts that variations of the climate system should match the dominant frequencies of the orbital forcing in the 41 and 23 kyr**-1 frequency bands. Such a linear theory would predict that the amplitude variations of the climate response in these bands should match amplitude variations in orbital forcing. Here we compare amplitude variations of the marine oxygen isotope record with orbital forcing in these bands over the last 700,000 years and find systematic changes through time. We express these amplitude mismatches as variations in the glacial response time, a measure of the climate system's sensitivity to orbitally induced insolation changes. Variations in the glacial response time occur in all frequencies bands without strong concentration of variance in any given band, and have a 'red' spectrum with larger variations at the longer periods. The response time is coherent with delta18O at periods of 100 and 41 kyr, which suggests that the variations in glacial response time in part reflect internal feedback mechanisms of the global climate system. The phase relationship between the estimated glacial response time and the delta18O (ice volume) record is very different at these two frequencies, which suggests at least two separate feedback mechanisms. The first mechanism enhances the 100,000-year climate cycle by increasing rates of change during major glacial terminations. Candidates for this feedback include lithospheric depression and rebound, enhanced ice calving from large marine based ice sheets, and possibly others. A second set of mechanisms, which is detected in the response to the 41,000-year orbital cycle of Earth's obliquity, accelerates ice growth events and slows glacial melting. Some models which include feedbacks between ice sheets, sea ice, and deep ocean temperatures predict early rapid ice growth, followed by slower growth, and this general feature is consistent with our analysis. While we can not at present identify the specific feedbacks leading to ... Dataset Sea ice PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-95.650000,-95.650000,-0.097000,-0.097000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AGE Cibicides sp. δ18O DEPTH sediment/rock Lamont-Doherty Earth Observatory Columbia University LDEO Mass spectrometer Finnigan MAT 251 PC Piston corer RC13 RC13-110 Robert Conrad Uvigerina sp. |
spellingShingle |
AGE Cibicides sp. δ18O DEPTH sediment/rock Lamont-Doherty Earth Observatory Columbia University LDEO Mass spectrometer Finnigan MAT 251 PC Piston corer RC13 RC13-110 Robert Conrad Uvigerina sp. Pisias, Nicklas G Mix, Alan C Zahn, Rainer Stable oxygen isotope ratios of benthic foraminifera from sediment core RC13-110 (Table 1) |
topic_facet |
AGE Cibicides sp. δ18O DEPTH sediment/rock Lamont-Doherty Earth Observatory Columbia University LDEO Mass spectrometer Finnigan MAT 251 PC Piston corer RC13 RC13-110 Robert Conrad Uvigerina sp. |
description |
The Milankovitch theory of climate change predicts that variations of the climate system should match the dominant frequencies of the orbital forcing in the 41 and 23 kyr**-1 frequency bands. Such a linear theory would predict that the amplitude variations of the climate response in these bands should match amplitude variations in orbital forcing. Here we compare amplitude variations of the marine oxygen isotope record with orbital forcing in these bands over the last 700,000 years and find systematic changes through time. We express these amplitude mismatches as variations in the glacial response time, a measure of the climate system's sensitivity to orbitally induced insolation changes. Variations in the glacial response time occur in all frequencies bands without strong concentration of variance in any given band, and have a 'red' spectrum with larger variations at the longer periods. The response time is coherent with delta18O at periods of 100 and 41 kyr, which suggests that the variations in glacial response time in part reflect internal feedback mechanisms of the global climate system. The phase relationship between the estimated glacial response time and the delta18O (ice volume) record is very different at these two frequencies, which suggests at least two separate feedback mechanisms. The first mechanism enhances the 100,000-year climate cycle by increasing rates of change during major glacial terminations. Candidates for this feedback include lithospheric depression and rebound, enhanced ice calving from large marine based ice sheets, and possibly others. A second set of mechanisms, which is detected in the response to the 41,000-year orbital cycle of Earth's obliquity, accelerates ice growth events and slows glacial melting. Some models which include feedbacks between ice sheets, sea ice, and deep ocean temperatures predict early rapid ice growth, followed by slower growth, and this general feature is consistent with our analysis. While we can not at present identify the specific feedbacks leading to ... |
format |
Dataset |
author |
Pisias, Nicklas G Mix, Alan C Zahn, Rainer |
author_facet |
Pisias, Nicklas G Mix, Alan C Zahn, Rainer |
author_sort |
Pisias, Nicklas G |
title |
Stable oxygen isotope ratios of benthic foraminifera from sediment core RC13-110 (Table 1) |
title_short |
Stable oxygen isotope ratios of benthic foraminifera from sediment core RC13-110 (Table 1) |
title_full |
Stable oxygen isotope ratios of benthic foraminifera from sediment core RC13-110 (Table 1) |
title_fullStr |
Stable oxygen isotope ratios of benthic foraminifera from sediment core RC13-110 (Table 1) |
title_full_unstemmed |
Stable oxygen isotope ratios of benthic foraminifera from sediment core RC13-110 (Table 1) |
title_sort |
stable oxygen isotope ratios of benthic foraminifera from sediment core rc13-110 (table 1) |
publisher |
PANGAEA |
publishDate |
1990 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.55386 https://doi.org/10.1594/PANGAEA.55386 |
op_coverage |
LATITUDE: -0.097000 * LONGITUDE: -95.650000 * DATE/TIME START: 1970-04-26T00:00:00 * DATE/TIME END: 1970-04-26T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.01 m * MAXIMUM DEPTH, sediment/rock: 15.44 m |
long_lat |
ENVELOPE(-95.650000,-95.650000,-0.097000,-0.097000) |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Supplement to: Pisias, Nicklas G; Mix, Alan C; Zahn, Rainer (1990): Nonlinear response in the global climate system: evidence from benthic oxygen isotopic record in core RC13-110. Paleoceanography, 5(2), 147-160, https://doi.org/10.1029/PA005i002p00147 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.55386 https://doi.org/10.1594/PANGAEA.55386 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.5538610.1029/PA005i002p00147 |
_version_ |
1810478855642677248 |