Natural and anthropogenic changes in atmospheric greenhouse gases over the past 2 millennia
Millennial changes in atmospheric trace gas composition are best determined from air enclosed in ice sheets. Air extracted from the open pores in firn and the bubbles in ice is measured to derive the past concentrations and isotopic ratios of the long lived trace gases. The significant increases obs...
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Strategic Science in Antarctica 2013 Conference, At University of Tasmania, Hobart.
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ftansto:oai:apo-prod.ansto.gov.au:10238/6420 2023-05-15T13:36:16+02:00 Natural and anthropogenic changes in atmospheric greenhouse gases over the past 2 millennia Etheridge, DM Rubino, M Trudinger, CM Allison, CE Steele, LP Thornton, D Vollmer, M Krummel, PB Smith, AM Curran, MAJ Sturgess, WT 2015-11-11 http://apo.ansto.gov.au/dspace/handle/10238/6420 http://conference.antarctica.gov.au/program/conference/day-3-ice-sheet-and-the-paleoclimate en eng Strategic Science in Antarctica 2013 Conference, At University of Tasmania, Hobart. Etheridge, D., Rubino, M., Trudinger, C., Allison, C., Steele, P., Thornton, D., Vollmer, M., Krummel, P., Smith, A., Curran, M., Schaefer, H., & Sturges, W. (2013). Natural and anthropogenic changes in atmospheric greenhouse gases over the past 2 millennia. Paper presented at the Strategic Science in Antarctica 24-26 June 2013, Hobart, Tasmaina. http://conference.antarctica.gov.au/program/conference/day-3-ice-sheet-and-the-paleoclimate http://apo.ansto.gov.au/dspace/handle/10238/6420 Gases Ice Air Isotopes Chlorofluourocarbons Nitrous oxide Conference Paper 2015 ftansto 2020-07-27T22:28:29Z Millennial changes in atmospheric trace gas composition are best determined from air enclosed in ice sheets. Air extracted from the open pores in firn and the bubbles in ice is measured to derive the past concentrations and isotopic ratios of the long lived trace gases. The significant increases observed in CO2, CH4 and N2O since about 1750 and the more recent appearance of synthetic gases such as the CFCs in the atmosphere are a key feature of the anthropocene. The millennia preceding the anthropocene, the Late Pre-Industrial Holocene (LPIH), show evidence of natural changes in trace gases that can be used to constrain models and improve their ability to predict future changes under scenarios of anthropogenic emissions and climate change. Precise measurements and ice core air samples that are accurately dated and highly resolved in time are required to record the small and rapid trace gas signals of this period. The atmospheric composition records produced by CSIRO and collaborators using the Law Dome, Antarctica ice cores are widely used in models of climate, atmospheric chemistry and the carbon cycle over the anthropocene and the LPIH. Results from these studies have been influential in informing global policies, including the Montreal and Kyoto Protocols. We will present the recently revised trace gas records from Law Dome and new measurements of tracers from these and other ice sites that reveal the causes of atmospheric changes over the anthropocene and the LPIH. Conference Object Antarc* Antarctica ice core Australian Nuclear Science and Technology Organisation: ANSTO Publications Online Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) |
institution |
Open Polar |
collection |
Australian Nuclear Science and Technology Organisation: ANSTO Publications Online |
op_collection_id |
ftansto |
language |
English |
topic |
Gases Ice Air Isotopes Chlorofluourocarbons Nitrous oxide |
spellingShingle |
Gases Ice Air Isotopes Chlorofluourocarbons Nitrous oxide Etheridge, DM Rubino, M Trudinger, CM Allison, CE Steele, LP Thornton, D Vollmer, M Krummel, PB Smith, AM Curran, MAJ Sturgess, WT Natural and anthropogenic changes in atmospheric greenhouse gases over the past 2 millennia |
topic_facet |
Gases Ice Air Isotopes Chlorofluourocarbons Nitrous oxide |
description |
Millennial changes in atmospheric trace gas composition are best determined from air enclosed in ice sheets. Air extracted from the open pores in firn and the bubbles in ice is measured to derive the past concentrations and isotopic ratios of the long lived trace gases. The significant increases observed in CO2, CH4 and N2O since about 1750 and the more recent appearance of synthetic gases such as the CFCs in the atmosphere are a key feature of the anthropocene. The millennia preceding the anthropocene, the Late Pre-Industrial Holocene (LPIH), show evidence of natural changes in trace gases that can be used to constrain models and improve their ability to predict future changes under scenarios of anthropogenic emissions and climate change. Precise measurements and ice core air samples that are accurately dated and highly resolved in time are required to record the small and rapid trace gas signals of this period. The atmospheric composition records produced by CSIRO and collaborators using the Law Dome, Antarctica ice cores are widely used in models of climate, atmospheric chemistry and the carbon cycle over the anthropocene and the LPIH. Results from these studies have been influential in informing global policies, including the Montreal and Kyoto Protocols. We will present the recently revised trace gas records from Law Dome and new measurements of tracers from these and other ice sites that reveal the causes of atmospheric changes over the anthropocene and the LPIH. |
format |
Conference Object |
author |
Etheridge, DM Rubino, M Trudinger, CM Allison, CE Steele, LP Thornton, D Vollmer, M Krummel, PB Smith, AM Curran, MAJ Sturgess, WT |
author_facet |
Etheridge, DM Rubino, M Trudinger, CM Allison, CE Steele, LP Thornton, D Vollmer, M Krummel, PB Smith, AM Curran, MAJ Sturgess, WT |
author_sort |
Etheridge, DM |
title |
Natural and anthropogenic changes in atmospheric greenhouse gases over the past 2 millennia |
title_short |
Natural and anthropogenic changes in atmospheric greenhouse gases over the past 2 millennia |
title_full |
Natural and anthropogenic changes in atmospheric greenhouse gases over the past 2 millennia |
title_fullStr |
Natural and anthropogenic changes in atmospheric greenhouse gases over the past 2 millennia |
title_full_unstemmed |
Natural and anthropogenic changes in atmospheric greenhouse gases over the past 2 millennia |
title_sort |
natural and anthropogenic changes in atmospheric greenhouse gases over the past 2 millennia |
publisher |
Strategic Science in Antarctica 2013 Conference, At University of Tasmania, Hobart. |
publishDate |
2015 |
url |
http://apo.ansto.gov.au/dspace/handle/10238/6420 http://conference.antarctica.gov.au/program/conference/day-3-ice-sheet-and-the-paleoclimate |
long_lat |
ENVELOPE(112.833,112.833,-66.733,-66.733) |
geographic |
Law Dome |
geographic_facet |
Law Dome |
genre |
Antarc* Antarctica ice core |
genre_facet |
Antarc* Antarctica ice core |
op_relation |
Etheridge, D., Rubino, M., Trudinger, C., Allison, C., Steele, P., Thornton, D., Vollmer, M., Krummel, P., Smith, A., Curran, M., Schaefer, H., & Sturges, W. (2013). Natural and anthropogenic changes in atmospheric greenhouse gases over the past 2 millennia. Paper presented at the Strategic Science in Antarctica 24-26 June 2013, Hobart, Tasmaina. http://conference.antarctica.gov.au/program/conference/day-3-ice-sheet-and-the-paleoclimate http://apo.ansto.gov.au/dspace/handle/10238/6420 |
_version_ |
1766076291179610112 |