The Variation of atmospheric carbon dioxide,methane and nitrous oxide during the holocene from ice core analysis
Typescript Thesis (PhD)--University of Melbourne, School of Earth Sciences, 2005 Includes bibliographical references (leaves 151-168) Recent studies have demonstrated that the atmospheric concentrations of radiatively important greenhouse gases, including methane (CH4), carbon dioxide (CO2), nitrous...
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ftumelbourne:oai:jupiter.its.unimelb.edu.au:11343/341614 2024-06-02T07:57:00+00:00 The Variation of atmospheric carbon dioxide,methane and nitrous oxide during the holocene from ice core analysis MacFarling Meure, Cecelia. 2004 http://hdl.handle.net/11343/341614 English eng University of Melbourne THSS_b2968052-00001 http://hdl.handle.net/11343/341614 Copyright in works deposited in Minerva Access is retained by the copyright owner. The work may not be altered without permission from the copyright owner. Readers may only download, print and save electronic copies of whole works for their own personal non-commercial use. Any use that exceeds these limits requires permission from the copyright owner. Attribution is essential when quoting or paraphrasing from these works. Atmosphere -- Observations Climatic changes -- Observations PhD thesis 2004 ftumelbourne 2024-05-06T15:55:48Z Typescript Thesis (PhD)--University of Melbourne, School of Earth Sciences, 2005 Includes bibliographical references (leaves 151-168) Recent studies have demonstrated that the atmospheric concentrations of radiatively important greenhouse gases, including methane (CH4), carbon dioxide (CO2), nitrous oxide (N2O) and carbon monoxide (CO), have significantly increased during the past 200 years due to anthropogenic emissions. Analysis of air trapped in polar ice cores allows for past atmospheric variations due to natural climate conditions to be investigated, placing recent changes in a historical context. In this thesis new high- precision, multispecies measurements of atmospheric trace gas concentrations during the Holocene have been produced by analysing the air trapped in the ice at Law Dome, East Antarctica (66�46'08"E, 112�48�28�S). The ice core records are well-dated, have high age resolution and overlap with modem instrumental records due to the high accumulation rate at the drilling sites. The combination of high age resolution, precise dating and high precision measurements allows for subtle, decadal-scale variability to be detected. The multispecies measurement technique allows for biogeochemical causes of variations to be identified. The first part of this study focused on the late Holocene period (AD 0 to 1975). New high-precision records of CH4, CO2, N2O and CO have been produced for this period. The CH4 and CO2 measurements are used to build upon the existing Law Dome records of these gases during the last 1000 years, to validate and further define previously observed variations. The new measurements extend the records of these gases by another 1000 years. As a consequence of the multispecies measurement technique it has been possible to also measure N2O and CO during this period. These new measurements highlight the atmospheric response to the Little Ice Age (LIA) cooling (AD 1550 to 1800), particularly a 10 ppm decrease in atmospheric C02 between AD 1550 and 1600. A stabilization of CO2 during ... Doctoral or Postdoctoral Thesis Antarc* Antarctica East Antarctica ice core The University of Melbourne: Digital Repository East Antarctica Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) |
institution |
Open Polar |
collection |
The University of Melbourne: Digital Repository |
op_collection_id |
ftumelbourne |
language |
English |
topic |
Atmosphere -- Observations Climatic changes -- Observations |
spellingShingle |
Atmosphere -- Observations Climatic changes -- Observations MacFarling Meure, Cecelia. The Variation of atmospheric carbon dioxide,methane and nitrous oxide during the holocene from ice core analysis |
topic_facet |
Atmosphere -- Observations Climatic changes -- Observations |
description |
Typescript Thesis (PhD)--University of Melbourne, School of Earth Sciences, 2005 Includes bibliographical references (leaves 151-168) Recent studies have demonstrated that the atmospheric concentrations of radiatively important greenhouse gases, including methane (CH4), carbon dioxide (CO2), nitrous oxide (N2O) and carbon monoxide (CO), have significantly increased during the past 200 years due to anthropogenic emissions. Analysis of air trapped in polar ice cores allows for past atmospheric variations due to natural climate conditions to be investigated, placing recent changes in a historical context. In this thesis new high- precision, multispecies measurements of atmospheric trace gas concentrations during the Holocene have been produced by analysing the air trapped in the ice at Law Dome, East Antarctica (66�46'08"E, 112�48�28�S). The ice core records are well-dated, have high age resolution and overlap with modem instrumental records due to the high accumulation rate at the drilling sites. The combination of high age resolution, precise dating and high precision measurements allows for subtle, decadal-scale variability to be detected. The multispecies measurement technique allows for biogeochemical causes of variations to be identified. The first part of this study focused on the late Holocene period (AD 0 to 1975). New high-precision records of CH4, CO2, N2O and CO have been produced for this period. The CH4 and CO2 measurements are used to build upon the existing Law Dome records of these gases during the last 1000 years, to validate and further define previously observed variations. The new measurements extend the records of these gases by another 1000 years. As a consequence of the multispecies measurement technique it has been possible to also measure N2O and CO during this period. These new measurements highlight the atmospheric response to the Little Ice Age (LIA) cooling (AD 1550 to 1800), particularly a 10 ppm decrease in atmospheric C02 between AD 1550 and 1600. A stabilization of CO2 during ... |
format |
Doctoral or Postdoctoral Thesis |
author |
MacFarling Meure, Cecelia. |
author_facet |
MacFarling Meure, Cecelia. |
author_sort |
MacFarling Meure, Cecelia. |
title |
The Variation of atmospheric carbon dioxide,methane and nitrous oxide during the holocene from ice core analysis |
title_short |
The Variation of atmospheric carbon dioxide,methane and nitrous oxide during the holocene from ice core analysis |
title_full |
The Variation of atmospheric carbon dioxide,methane and nitrous oxide during the holocene from ice core analysis |
title_fullStr |
The Variation of atmospheric carbon dioxide,methane and nitrous oxide during the holocene from ice core analysis |
title_full_unstemmed |
The Variation of atmospheric carbon dioxide,methane and nitrous oxide during the holocene from ice core analysis |
title_sort |
variation of atmospheric carbon dioxide,methane and nitrous oxide during the holocene from ice core analysis |
publisher |
University of Melbourne |
publishDate |
2004 |
url |
http://hdl.handle.net/11343/341614 |
long_lat |
ENVELOPE(112.833,112.833,-66.733,-66.733) |
geographic |
East Antarctica Law Dome |
geographic_facet |
East Antarctica Law Dome |
genre |
Antarc* Antarctica East Antarctica ice core |
genre_facet |
Antarc* Antarctica East Antarctica ice core |
op_relation |
THSS_b2968052-00001 http://hdl.handle.net/11343/341614 |
op_rights |
Copyright in works deposited in Minerva Access is retained by the copyright owner. The work may not be altered without permission from the copyright owner. Readers may only download, print and save electronic copies of whole works for their own personal non-commercial use. Any use that exceeds these limits requires permission from the copyright owner. Attribution is essential when quoting or paraphrasing from these works. |
_version_ |
1800737686283091968 |