20th-Century doubling in dust archived in an Antarctic Peninsula ice core parallels climate change and desertification in South America
Crustal dust in the atmosphere impacts Earth's radiative forcing directly by modifying the radiation budget and affecting cloud nucleation and optical properties, and indirectly through ocean fertilization, which alters carbon sequestration. Increased dust in the atmosphere has been linked to d...
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ftpubmed:oai:pubmedcentral.nih.gov:1851562 2023-05-15T13:58:01+02:00 20th-Century doubling in dust archived in an Antarctic Peninsula ice core parallels climate change and desertification in South America McConnell, Joseph R. Aristarain, Alberto J. Banta, J. Ryan Edwards, P. Ross Simões, Jefferson C. 2007-04-03 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1851562 http://www.ncbi.nlm.nih.gov/pubmed/17389397 https://doi.org/10.1073/pnas.0607657104 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1851562 http://www.ncbi.nlm.nih.gov/pubmed/17389397 http://dx.doi.org/10.1073/pnas.0607657104 © 2007 by The National Academy of Sciences of the USA Physical Sciences Text 2007 ftpubmed https://doi.org/10.1073/pnas.0607657104 2013-08-31T20:04:45Z Crustal dust in the atmosphere impacts Earth's radiative forcing directly by modifying the radiation budget and affecting cloud nucleation and optical properties, and indirectly through ocean fertilization, which alters carbon sequestration. Increased dust in the atmosphere has been linked to decreased global air temperature in past ice core studies of glacial to interglacial transitions. We present a continuous ice core record of aluminum deposition during recent centuries in the northern Antarctic Peninsula, the most rapidly warming region of the Southern Hemisphere; such a record has not been reported previously. This record shows that aluminosilicate dust deposition more than doubled during the 20th century, coincident with the ≈1°C Southern Hemisphere warming: a pattern in parallel with increasing air temperatures, decreasing relative humidity, and widespread desertification in Patagonia and northern Argentina. These results have far-reaching implications for understanding the forces driving dust generation and impacts of changing dust levels on climate both in the recent past and future. Text Antarc* Antarctic Antarctic Peninsula ice core PubMed Central (PMC) Antarctic Antarctic Peninsula Argentina Patagonia Proceedings of the National Academy of Sciences 104 14 5743 5748 |
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English |
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Physical Sciences |
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Physical Sciences McConnell, Joseph R. Aristarain, Alberto J. Banta, J. Ryan Edwards, P. Ross Simões, Jefferson C. 20th-Century doubling in dust archived in an Antarctic Peninsula ice core parallels climate change and desertification in South America |
topic_facet |
Physical Sciences |
description |
Crustal dust in the atmosphere impacts Earth's radiative forcing directly by modifying the radiation budget and affecting cloud nucleation and optical properties, and indirectly through ocean fertilization, which alters carbon sequestration. Increased dust in the atmosphere has been linked to decreased global air temperature in past ice core studies of glacial to interglacial transitions. We present a continuous ice core record of aluminum deposition during recent centuries in the northern Antarctic Peninsula, the most rapidly warming region of the Southern Hemisphere; such a record has not been reported previously. This record shows that aluminosilicate dust deposition more than doubled during the 20th century, coincident with the ≈1°C Southern Hemisphere warming: a pattern in parallel with increasing air temperatures, decreasing relative humidity, and widespread desertification in Patagonia and northern Argentina. These results have far-reaching implications for understanding the forces driving dust generation and impacts of changing dust levels on climate both in the recent past and future. |
format |
Text |
author |
McConnell, Joseph R. Aristarain, Alberto J. Banta, J. Ryan Edwards, P. Ross Simões, Jefferson C. |
author_facet |
McConnell, Joseph R. Aristarain, Alberto J. Banta, J. Ryan Edwards, P. Ross Simões, Jefferson C. |
author_sort |
McConnell, Joseph R. |
title |
20th-Century doubling in dust archived in an Antarctic Peninsula ice core parallels climate change and desertification in South America |
title_short |
20th-Century doubling in dust archived in an Antarctic Peninsula ice core parallels climate change and desertification in South America |
title_full |
20th-Century doubling in dust archived in an Antarctic Peninsula ice core parallels climate change and desertification in South America |
title_fullStr |
20th-Century doubling in dust archived in an Antarctic Peninsula ice core parallels climate change and desertification in South America |
title_full_unstemmed |
20th-Century doubling in dust archived in an Antarctic Peninsula ice core parallels climate change and desertification in South America |
title_sort |
20th-century doubling in dust archived in an antarctic peninsula ice core parallels climate change and desertification in south america |
publisher |
National Academy of Sciences |
publishDate |
2007 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1851562 http://www.ncbi.nlm.nih.gov/pubmed/17389397 https://doi.org/10.1073/pnas.0607657104 |
geographic |
Antarctic Antarctic Peninsula Argentina Patagonia |
geographic_facet |
Antarctic Antarctic Peninsula Argentina Patagonia |
genre |
Antarc* Antarctic Antarctic Peninsula ice core |
genre_facet |
Antarc* Antarctic Antarctic Peninsula ice core |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1851562 http://www.ncbi.nlm.nih.gov/pubmed/17389397 http://dx.doi.org/10.1073/pnas.0607657104 |
op_rights |
© 2007 by The National Academy of Sciences of the USA |
op_doi |
https://doi.org/10.1073/pnas.0607657104 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
104 |
container_issue |
14 |
container_start_page |
5743 |
op_container_end_page |
5748 |
_version_ |
1766265954352758784 |