Insights from Antarctica on volcanic forcing during the Common Era
Assessments of climate sensitivity to projected greenhouse gas concentrations underpin environmental policy decisions, with such assessments often based on model simulations of climate during recent centuries and millennia. These simulations depend critically on accurate records of past aerosol forc...
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ftcurtin:oai:espace.curtin.edu.au:20.500.11937/40481 2023-06-11T04:06:59+02:00 Insights from Antarctica on volcanic forcing during the Common Era Sigl, M. McConnell, J. Toohey, M. Curran, M. Das, S. Edwards, Peter Isaksson, E. Kawamura, K. Kipfstuhl, S. Krüger, K. Layman, L. Maselli, O. Motizuki, Y. Motoyama, H. Pasteris, D. Severi, M. 2014 restricted https://hdl.handle.net/20.500.11937/40481 https://doi.org/10.1038/NCLIMATE2293 unknown Nature Publishing Group http://hdl.handle.net/20.500.11937/40481 doi:10.1038/NCLIMATE2293 Journal Article 2014 ftcurtin https://doi.org/20.500.11937/4048110.1038/NCLIMATE2293 2023-05-30T19:41:26Z Assessments of climate sensitivity to projected greenhouse gas concentrations underpin environmental policy decisions, with such assessments often based on model simulations of climate during recent centuries and millennia. These simulations depend critically on accurate records of past aerosol forcing from global-scale volcanic eruptions, reconstructed from measurements of sulphate deposition in ice cores. Non-uniform transport and deposition of volcanic fallout mean that multiple records from a wide array of ice cores must be combined to create accurate reconstructions. Here we re-evaluated the record of volcanic sulphate deposition using a much more extensive array of Antarctic ice cores. In our new reconstruction, many additional records have been added and dating of previously published records corrected through precise synchronization to the annually dated West Antarctic Ice Sheet Divide ice core7, improving and extending the record throughout the Common Era. Whereas agreement with existing reconstructions is excellent after 1500, we found a substantially different history of volcanic aerosol deposition before 1500; for example, global aerosol forcing values from some of the largest eruptions (for example, 1257 and 1458) previously were overestimated by 20–30% and others underestimated by 20–50%. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Curtin University: espace Antarctic West Antarctic Ice Sheet Nature Climate Change 4 8 693 697 |
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Assessments of climate sensitivity to projected greenhouse gas concentrations underpin environmental policy decisions, with such assessments often based on model simulations of climate during recent centuries and millennia. These simulations depend critically on accurate records of past aerosol forcing from global-scale volcanic eruptions, reconstructed from measurements of sulphate deposition in ice cores. Non-uniform transport and deposition of volcanic fallout mean that multiple records from a wide array of ice cores must be combined to create accurate reconstructions. Here we re-evaluated the record of volcanic sulphate deposition using a much more extensive array of Antarctic ice cores. In our new reconstruction, many additional records have been added and dating of previously published records corrected through precise synchronization to the annually dated West Antarctic Ice Sheet Divide ice core7, improving and extending the record throughout the Common Era. Whereas agreement with existing reconstructions is excellent after 1500, we found a substantially different history of volcanic aerosol deposition before 1500; for example, global aerosol forcing values from some of the largest eruptions (for example, 1257 and 1458) previously were overestimated by 20–30% and others underestimated by 20–50%. |
format |
Article in Journal/Newspaper |
author |
Sigl, M. McConnell, J. Toohey, M. Curran, M. Das, S. Edwards, Peter Isaksson, E. Kawamura, K. Kipfstuhl, S. Krüger, K. Layman, L. Maselli, O. Motizuki, Y. Motoyama, H. Pasteris, D. Severi, M. |
spellingShingle |
Sigl, M. McConnell, J. Toohey, M. Curran, M. Das, S. Edwards, Peter Isaksson, E. Kawamura, K. Kipfstuhl, S. Krüger, K. Layman, L. Maselli, O. Motizuki, Y. Motoyama, H. Pasteris, D. Severi, M. Insights from Antarctica on volcanic forcing during the Common Era |
author_facet |
Sigl, M. McConnell, J. Toohey, M. Curran, M. Das, S. Edwards, Peter Isaksson, E. Kawamura, K. Kipfstuhl, S. Krüger, K. Layman, L. Maselli, O. Motizuki, Y. Motoyama, H. Pasteris, D. Severi, M. |
author_sort |
Sigl, M. |
title |
Insights from Antarctica on volcanic forcing during the Common Era |
title_short |
Insights from Antarctica on volcanic forcing during the Common Era |
title_full |
Insights from Antarctica on volcanic forcing during the Common Era |
title_fullStr |
Insights from Antarctica on volcanic forcing during the Common Era |
title_full_unstemmed |
Insights from Antarctica on volcanic forcing during the Common Era |
title_sort |
insights from antarctica on volcanic forcing during the common era |
publisher |
Nature Publishing Group |
publishDate |
2014 |
url |
https://hdl.handle.net/20.500.11937/40481 https://doi.org/10.1038/NCLIMATE2293 |
geographic |
Antarctic West Antarctic Ice Sheet |
geographic_facet |
Antarctic West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet |
op_relation |
http://hdl.handle.net/20.500.11937/40481 doi:10.1038/NCLIMATE2293 |
op_doi |
https://doi.org/20.500.11937/4048110.1038/NCLIMATE2293 |
container_title |
Nature Climate Change |
container_volume |
4 |
container_issue |
8 |
container_start_page |
693 |
op_container_end_page |
697 |
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1768379362276540416 |