Variations of the CO2 concentration of occluded air and of anions and dust in polar ice cores
Analysis of impurities entrapped in natural ice is the most promising method for reconstructing the history of atmospheric composition before the period of direct measurement and offers the possibility of extending the record to at least 100,000 years B.P. We report here the present state of work in...
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American Geophysical Union
1985
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ftunivbern:oai:boris.unibe.ch:160973 2023-08-20T04:00:00+02:00 Variations of the CO2 concentration of occluded air and of anions and dust in polar ice cores Oeschger, H. Stauffer, B. Finkel, R. Langway Jr., C.C. Sundquist, E.T. Broecker, W.S. 1985 application/pdf https://boris.unibe.ch/160973/1/Oeschger_Variations_of_the_CO2_concentration_of_occluded_air.pdf https://boris.unibe.ch/160973/ eng eng American Geophysical Union https://boris.unibe.ch/160973/ info:eu-repo/semantics/restrictedAccess Oeschger, H.; Stauffer, B.; Finkel, R.; Langway Jr., C.C. (1985). Variations of the CO2 concentration of occluded air and of anions and dust in polar ice cores. In: Sundquist, E.T.; Broecker, W.S. (eds.) The Carbon Cycle and Atmospheric CO2: Natural Variations Archean to Present. Geophysical Monograph Series: Vol. 32 (pp. 132-142). American Geophysical Union 10.1029/GM032p0132 <http://dx.doi.org/10.1029/GM032p0132> 530 Physics info:eu-repo/semantics/bookPart info:eu-repo/semantics/publishedVersion PeerReviewed 1985 ftunivbern https://doi.org/10.1029/GM032p0132 2023-07-31T22:09:34Z Analysis of impurities entrapped in natural ice is the most promising method for reconstructing the history of atmospheric composition before the period of direct measurement and offers the possibility of extending the record to at least 100,000 years B.P. We report here the present state of work in this field, with special emphasis on atmospheric CO2 concentration. After discussing the mechanism by which atmospheric gases are entrapped in ice, we report CO2 concentrations in ice core samples, up to 100,000 years old, from deep drilling projects in Greenland and the Antarctic. Results from ice deposited during the last 2000 years allow us to estimate the preindustrial atmospheric CO2 level, an important boundary condition for modelling the anthropogenic CO2 increase. Using older samples from a deep ice core drilled at Dye 3, Greenland, we show that the CO2 concentration was 180 to 200 ppmv at the end of the Wisconsin and increased during the transition to the Holocene to values in the 260 to 300 ppmv range. Detailed CO2 measurements on sections of the Wisconsin part of the Dye 3 core which, based on δ18O, were deposited during times of significant climatic variation, show that the δ18O variations were accompanied by simultaneous correlated rapid CO2 variations. Other parameters, including micro-particle concentration and Cl−, NO− 3 and SO2− 4 concentrations also showed significant variations which correlate with the measured δ18O shifts. Book Part Antarc* Antarctic Dye 3 Dye-3 Greenland ice core BORIS (Bern Open Repository and Information System, University of Bern) Antarctic Greenland The Antarctic 132 142 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
530 Physics |
spellingShingle |
530 Physics Oeschger, H. Stauffer, B. Finkel, R. Langway Jr., C.C. Variations of the CO2 concentration of occluded air and of anions and dust in polar ice cores |
topic_facet |
530 Physics |
description |
Analysis of impurities entrapped in natural ice is the most promising method for reconstructing the history of atmospheric composition before the period of direct measurement and offers the possibility of extending the record to at least 100,000 years B.P. We report here the present state of work in this field, with special emphasis on atmospheric CO2 concentration. After discussing the mechanism by which atmospheric gases are entrapped in ice, we report CO2 concentrations in ice core samples, up to 100,000 years old, from deep drilling projects in Greenland and the Antarctic. Results from ice deposited during the last 2000 years allow us to estimate the preindustrial atmospheric CO2 level, an important boundary condition for modelling the anthropogenic CO2 increase. Using older samples from a deep ice core drilled at Dye 3, Greenland, we show that the CO2 concentration was 180 to 200 ppmv at the end of the Wisconsin and increased during the transition to the Holocene to values in the 260 to 300 ppmv range. Detailed CO2 measurements on sections of the Wisconsin part of the Dye 3 core which, based on δ18O, were deposited during times of significant climatic variation, show that the δ18O variations were accompanied by simultaneous correlated rapid CO2 variations. Other parameters, including micro-particle concentration and Cl−, NO− 3 and SO2− 4 concentrations also showed significant variations which correlate with the measured δ18O shifts. |
author2 |
Sundquist, E.T. Broecker, W.S. |
format |
Book Part |
author |
Oeschger, H. Stauffer, B. Finkel, R. Langway Jr., C.C. |
author_facet |
Oeschger, H. Stauffer, B. Finkel, R. Langway Jr., C.C. |
author_sort |
Oeschger, H. |
title |
Variations of the CO2 concentration of occluded air and of anions and dust in polar ice cores |
title_short |
Variations of the CO2 concentration of occluded air and of anions and dust in polar ice cores |
title_full |
Variations of the CO2 concentration of occluded air and of anions and dust in polar ice cores |
title_fullStr |
Variations of the CO2 concentration of occluded air and of anions and dust in polar ice cores |
title_full_unstemmed |
Variations of the CO2 concentration of occluded air and of anions and dust in polar ice cores |
title_sort |
variations of the co2 concentration of occluded air and of anions and dust in polar ice cores |
publisher |
American Geophysical Union |
publishDate |
1985 |
url |
https://boris.unibe.ch/160973/1/Oeschger_Variations_of_the_CO2_concentration_of_occluded_air.pdf https://boris.unibe.ch/160973/ |
geographic |
Antarctic Greenland The Antarctic |
geographic_facet |
Antarctic Greenland The Antarctic |
genre |
Antarc* Antarctic Dye 3 Dye-3 Greenland ice core |
genre_facet |
Antarc* Antarctic Dye 3 Dye-3 Greenland ice core |
op_source |
Oeschger, H.; Stauffer, B.; Finkel, R.; Langway Jr., C.C. (1985). Variations of the CO2 concentration of occluded air and of anions and dust in polar ice cores. In: Sundquist, E.T.; Broecker, W.S. (eds.) The Carbon Cycle and Atmospheric CO2: Natural Variations Archean to Present. Geophysical Monograph Series: Vol. 32 (pp. 132-142). American Geophysical Union 10.1029/GM032p0132 <http://dx.doi.org/10.1029/GM032p0132> |
op_relation |
https://boris.unibe.ch/160973/ |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1029/GM032p0132 |
container_start_page |
132 |
op_container_end_page |
142 |
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1774716407347412992 |