Joint influence of surface erosion and high-latitude ice-sheet extent on Asian dust cycle during the last glacial maximum
Abstract The dust cycle plays an important role in the long-term evolution of the climate and environment. In this paper, an improved climate model including aerosol processes was used to carry out a set of sensitivity experiments and comparative analyses of the effects of high-latitude ice-sheet ex...
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Online Access: | http://dx.doi.org/10.1017/s0016756819000335 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756819000335 |
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crcambridgeupr:10.1017/s0016756819000335 2024-03-03T08:45:24+00:00 Joint influence of surface erosion and high-latitude ice-sheet extent on Asian dust cycle during the last glacial maximum Li, Xinzhou Liu, Xiaodong Zhou, Haibo 2019 http://dx.doi.org/10.1017/s0016756819000335 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756819000335 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Geological Magazine volume 157, issue 5, page 777-789 ISSN 0016-7568 1469-5081 Geology journal-article 2019 crcambridgeupr https://doi.org/10.1017/s0016756819000335 2024-02-08T08:26:56Z Abstract The dust cycle plays an important role in the long-term evolution of the climate and environment. In this paper, an improved climate model including aerosol processes was used to carry out a set of sensitivity experiments and comparative analyses of the effects of high-latitude ice-sheet extent and abnormal dust erosion, as well as Earth’s orbital parameters and atmospheric greenhouse gas content, on dust activities during the last glacial maximum. The comparative analysis found that incorporating the abnormal surface erosion factor alone could increase dust emissions by 2.77-fold and 3.77-fold of the present-day global and Asian dust emissions, respectively. The high-latitude ice-sheet factor caused global dust emissions to increase by 1.25-fold that of the present day. Sensitivity experiments showed that increased surface erosion in Asia during the last glacial maximum made the greatest contribution to the increased dust emissions in Asia, followed by the high-latitude ice-sheet factor, while the contributions of the greenhouse gas content and orbital parameters were relatively weak. Strong dust emissions during the glacial period were therefore not only dependent on the development of the high-latitude ice sheets but were strongly associated with the underlying surface characteristics of local dust source regions. Article in Journal/Newspaper Ice Sheet Cambridge University Press Geological Magazine 157 5 777 789 |
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Cambridge University Press |
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English |
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Geology |
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Geology Li, Xinzhou Liu, Xiaodong Zhou, Haibo Joint influence of surface erosion and high-latitude ice-sheet extent on Asian dust cycle during the last glacial maximum |
topic_facet |
Geology |
description |
Abstract The dust cycle plays an important role in the long-term evolution of the climate and environment. In this paper, an improved climate model including aerosol processes was used to carry out a set of sensitivity experiments and comparative analyses of the effects of high-latitude ice-sheet extent and abnormal dust erosion, as well as Earth’s orbital parameters and atmospheric greenhouse gas content, on dust activities during the last glacial maximum. The comparative analysis found that incorporating the abnormal surface erosion factor alone could increase dust emissions by 2.77-fold and 3.77-fold of the present-day global and Asian dust emissions, respectively. The high-latitude ice-sheet factor caused global dust emissions to increase by 1.25-fold that of the present day. Sensitivity experiments showed that increased surface erosion in Asia during the last glacial maximum made the greatest contribution to the increased dust emissions in Asia, followed by the high-latitude ice-sheet factor, while the contributions of the greenhouse gas content and orbital parameters were relatively weak. Strong dust emissions during the glacial period were therefore not only dependent on the development of the high-latitude ice sheets but were strongly associated with the underlying surface characteristics of local dust source regions. |
format |
Article in Journal/Newspaper |
author |
Li, Xinzhou Liu, Xiaodong Zhou, Haibo |
author_facet |
Li, Xinzhou Liu, Xiaodong Zhou, Haibo |
author_sort |
Li, Xinzhou |
title |
Joint influence of surface erosion and high-latitude ice-sheet extent on Asian dust cycle during the last glacial maximum |
title_short |
Joint influence of surface erosion and high-latitude ice-sheet extent on Asian dust cycle during the last glacial maximum |
title_full |
Joint influence of surface erosion and high-latitude ice-sheet extent on Asian dust cycle during the last glacial maximum |
title_fullStr |
Joint influence of surface erosion and high-latitude ice-sheet extent on Asian dust cycle during the last glacial maximum |
title_full_unstemmed |
Joint influence of surface erosion and high-latitude ice-sheet extent on Asian dust cycle during the last glacial maximum |
title_sort |
joint influence of surface erosion and high-latitude ice-sheet extent on asian dust cycle during the last glacial maximum |
publisher |
Cambridge University Press (CUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1017/s0016756819000335 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756819000335 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Geological Magazine volume 157, issue 5, page 777-789 ISSN 0016-7568 1469-5081 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0016756819000335 |
container_title |
Geological Magazine |
container_volume |
157 |
container_issue |
5 |
container_start_page |
777 |
op_container_end_page |
789 |
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1792500946978209792 |