Changes in continental and sea-salt atmospheric loadings in central Greenland during the most recent deglaciation: model-based estimates
Abstract By fitting a very simple atmospheric impurity model to high-resolution data on ice accumulation and contaminant fluxes in the GISP2 ice core, we have estimated changes in the atmospheric concentrations of soluble major ions, insoluble particulates and 10 Be during the transition from glacia...
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Cambridge University Press (CUP)
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crcambridgeupr:10.1017/s0022143000034845 2024-09-15T18:09:14+00:00 Changes in continental and sea-salt atmospheric loadings in central Greenland during the most recent deglaciation: model-based estimates Alley, R. B. Finkel, R. C. Nishiizumi, K. Anandakrishnan, S. Shuman, C. A. Mershon, G. Zielinski, G. A. Mayewski, P. A. 1995 http://dx.doi.org/10.1017/s0022143000034845 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000034845 en eng Cambridge University Press (CUP) Journal of Glaciology volume 41, issue 139, page 503-514 ISSN 0022-1430 1727-5652 journal-article 1995 crcambridgeupr https://doi.org/10.1017/s0022143000034845 2024-07-10T04:04:08Z Abstract By fitting a very simple atmospheric impurity model to high-resolution data on ice accumulation and contaminant fluxes in the GISP2 ice core, we have estimated changes in the atmospheric concentrations of soluble major ions, insoluble particulates and 10 Be during the transition from glacial to Holocene conditions. For many species, changes in concentration in the ice typically overestimate atmospheric changes, and changes in flux to the ice typically underestimate atmospheric changes, because times of increased atmospheric contaminant loading are also times of reduced snowfall. The model interpolates between the flux and concentration records by explicitly allowing for wet- and dry-deposition processes. Compared to the warm Preboreal that followed, we estimate that the atmosphere over Greenland sampled by snow accumulated during the Younger Dryas cold event contained on average four–seven times the insoluble particulates and nearly seven times the soluble calcium derived from continental sources, and about three times the sea salt but only slightly more cosmogenic 10 Be. Article in Journal/Newspaper Greenland ice core Journal of Glaciology Cambridge University Press Journal of Glaciology 41 139 503 514 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract By fitting a very simple atmospheric impurity model to high-resolution data on ice accumulation and contaminant fluxes in the GISP2 ice core, we have estimated changes in the atmospheric concentrations of soluble major ions, insoluble particulates and 10 Be during the transition from glacial to Holocene conditions. For many species, changes in concentration in the ice typically overestimate atmospheric changes, and changes in flux to the ice typically underestimate atmospheric changes, because times of increased atmospheric contaminant loading are also times of reduced snowfall. The model interpolates between the flux and concentration records by explicitly allowing for wet- and dry-deposition processes. Compared to the warm Preboreal that followed, we estimate that the atmosphere over Greenland sampled by snow accumulated during the Younger Dryas cold event contained on average four–seven times the insoluble particulates and nearly seven times the soluble calcium derived from continental sources, and about three times the sea salt but only slightly more cosmogenic 10 Be. |
format |
Article in Journal/Newspaper |
author |
Alley, R. B. Finkel, R. C. Nishiizumi, K. Anandakrishnan, S. Shuman, C. A. Mershon, G. Zielinski, G. A. Mayewski, P. A. |
spellingShingle |
Alley, R. B. Finkel, R. C. Nishiizumi, K. Anandakrishnan, S. Shuman, C. A. Mershon, G. Zielinski, G. A. Mayewski, P. A. Changes in continental and sea-salt atmospheric loadings in central Greenland during the most recent deglaciation: model-based estimates |
author_facet |
Alley, R. B. Finkel, R. C. Nishiizumi, K. Anandakrishnan, S. Shuman, C. A. Mershon, G. Zielinski, G. A. Mayewski, P. A. |
author_sort |
Alley, R. B. |
title |
Changes in continental and sea-salt atmospheric loadings in central Greenland during the most recent deglaciation: model-based estimates |
title_short |
Changes in continental and sea-salt atmospheric loadings in central Greenland during the most recent deglaciation: model-based estimates |
title_full |
Changes in continental and sea-salt atmospheric loadings in central Greenland during the most recent deglaciation: model-based estimates |
title_fullStr |
Changes in continental and sea-salt atmospheric loadings in central Greenland during the most recent deglaciation: model-based estimates |
title_full_unstemmed |
Changes in continental and sea-salt atmospheric loadings in central Greenland during the most recent deglaciation: model-based estimates |
title_sort |
changes in continental and sea-salt atmospheric loadings in central greenland during the most recent deglaciation: model-based estimates |
publisher |
Cambridge University Press (CUP) |
publishDate |
1995 |
url |
http://dx.doi.org/10.1017/s0022143000034845 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000034845 |
genre |
Greenland ice core Journal of Glaciology |
genre_facet |
Greenland ice core Journal of Glaciology |
op_source |
Journal of Glaciology volume 41, issue 139, page 503-514 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000034845 |
container_title |
Journal of Glaciology |
container_volume |
41 |
container_issue |
139 |
container_start_page |
503 |
op_container_end_page |
514 |
_version_ |
1810446659869474816 |