Mineral aerosols: a comparison of the last glacial maximum and preindustrial Holocene
A passive mineral dust aerosol model based on source strengths deduced from polar ice core dust concentrations is introduced into the Canadian Centre for Climate Modelling and Analysis (CCCma) second-generation atmospheric general circulation model (GCMII) and used to compare features of the fine pa...
Published in: | Canadian Journal of Earth Sciences |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2000
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/e99-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/e99-109 |
id |
crcansciencepubl:10.1139/e99-109 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/e99-109 2023-12-17T10:31:40+01:00 Mineral aerosols: a comparison of the last glacial maximum and preindustrial Holocene Reader, M C Fung, I McFarlane, N 2000 http://dx.doi.org/10.1139/e99-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/e99-109 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 37, issue 5, page 751-767 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 2000 crcansciencepubl https://doi.org/10.1139/e99-109 2023-11-19T13:38:51Z A passive mineral dust aerosol model based on source strengths deduced from polar ice core dust concentrations is introduced into the Canadian Centre for Climate Modelling and Analysis (CCCma) second-generation atmospheric general circulation model (GCMII) and used to compare features of the fine particle mineral dust aerosol in a last glacial maximum (LGM) simulation to those of a preindustrial Holocene (MOD) dust simulation. The resulting dust optical thickness is 8-16 times greater over most of the globe during the LGM. The model displays several seasonal characteristics observed in present-day satellite observations of dust, such as the summer maximum over the Arabian Sea and the seasonal north-south shift of the Sahara-Sahel plume. Both of these features are also present in the LGM simulation, though there are some noticeable differences in seasonal variation of dust between the last glacial maximum and the preindustrial Holocene. Since the simulated dust lifetimes are very similar for the MOD and LGM climates, it seems that increased LGM dust lifetime is not the major reason for the observed increase in dust concentration in polar ice cores during the LGM relative to the present. Article in Journal/Newspaper ice core Canadian Science Publishing (via Crossref) Canadian Journal of Earth Sciences 37 5 751 767 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Reader, M C Fung, I McFarlane, N Mineral aerosols: a comparison of the last glacial maximum and preindustrial Holocene |
topic_facet |
General Earth and Planetary Sciences |
description |
A passive mineral dust aerosol model based on source strengths deduced from polar ice core dust concentrations is introduced into the Canadian Centre for Climate Modelling and Analysis (CCCma) second-generation atmospheric general circulation model (GCMII) and used to compare features of the fine particle mineral dust aerosol in a last glacial maximum (LGM) simulation to those of a preindustrial Holocene (MOD) dust simulation. The resulting dust optical thickness is 8-16 times greater over most of the globe during the LGM. The model displays several seasonal characteristics observed in present-day satellite observations of dust, such as the summer maximum over the Arabian Sea and the seasonal north-south shift of the Sahara-Sahel plume. Both of these features are also present in the LGM simulation, though there are some noticeable differences in seasonal variation of dust between the last glacial maximum and the preindustrial Holocene. Since the simulated dust lifetimes are very similar for the MOD and LGM climates, it seems that increased LGM dust lifetime is not the major reason for the observed increase in dust concentration in polar ice cores during the LGM relative to the present. |
format |
Article in Journal/Newspaper |
author |
Reader, M C Fung, I McFarlane, N |
author_facet |
Reader, M C Fung, I McFarlane, N |
author_sort |
Reader, M C |
title |
Mineral aerosols: a comparison of the last glacial maximum and preindustrial Holocene |
title_short |
Mineral aerosols: a comparison of the last glacial maximum and preindustrial Holocene |
title_full |
Mineral aerosols: a comparison of the last glacial maximum and preindustrial Holocene |
title_fullStr |
Mineral aerosols: a comparison of the last glacial maximum and preindustrial Holocene |
title_full_unstemmed |
Mineral aerosols: a comparison of the last glacial maximum and preindustrial Holocene |
title_sort |
mineral aerosols: a comparison of the last glacial maximum and preindustrial holocene |
publisher |
Canadian Science Publishing |
publishDate |
2000 |
url |
http://dx.doi.org/10.1139/e99-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/e99-109 |
genre |
ice core |
genre_facet |
ice core |
op_source |
Canadian Journal of Earth Sciences volume 37, issue 5, page 751-767 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e99-109 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
37 |
container_issue |
5 |
container_start_page |
751 |
op_container_end_page |
767 |
_version_ |
1785585031443382272 |