Accumulation rates of ODP Site 177-1090
Dust has the potential to modify global climate by influencing the radiative balance of the atmosphere and by supplying iron and other essential limiting micronutrients to the ocean (Martin et al., 1990, doi:10.1038/345156a0; Martin, 1990, doi:10.1029/PA005i001p00001). Indeed, dust supply to the Sou...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.767460 2024-09-15T17:45:28+00:00 Accumulation rates of ODP Site 177-1090 Martínez‐García, Alfredo Rosell-Melé, Antoni Jaccard, Samuel L Geibert, Walter Sigman, Daniel M Haug, Gerald H LATITUDE: -42.913617 * LONGITUDE: 8.899817 * DATE/TIME START: 1997-12-25T00:00:00 * DATE/TIME END: 1997-12-25T00:00:00 2011 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.767460 https://doi.org/10.1594/PANGAEA.767460 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.767460 https://doi.org/10.1594/PANGAEA.767460 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Martínez‐García, Alfredo; Rosell-Melé, Antoni; Jaccard, Samuel L; Geibert, Walter; Sigman, Daniel M; Haug, Gerald H (2011): Southern Ocean dust-climate coupling over the past four million years. Nature, 476(7360), 312-316, https://doi.org/10.1038/nature10310 177-1090 COMPCORE Composite Core Joides Resolution Leg177 Ocean Drilling Program ODP South Atlantic Ocean dataset publication series 2011 ftpangaea https://doi.org/10.1594/PANGAEA.76746010.1038/nature10310 2024-07-24T02:31:21Z Dust has the potential to modify global climate by influencing the radiative balance of the atmosphere and by supplying iron and other essential limiting micronutrients to the ocean (Martin et al., 1990, doi:10.1038/345156a0; Martin, 1990, doi:10.1029/PA005i001p00001). Indeed, dust supply to the Southern Ocean increases during ice ages, and 'iron fertilization' of the subantarctic zone may have contributed up to 40 parts per million by volume (p.p.m.v.) of the decrease (80-100 p.p.m.v.) in atmospheric carbon dioxide observed during late Pleistocene glacial cycles (Watson et al., 2000, doi:10.1038/35037561; Kohfeld et al., 2005, doi:10.1126/science.1105375; Martínez-Garcia et al., 2009, doi:10.1029/2008PA001657; Sigman et al., 2010, doi:10.1038/nature09149; Hain et al., 2010, doi:10.1029/2010gb003790). So far, however, the magnitude of Southern Ocean dust deposition in earlier times and its role in the development and evolution of Pleistocene glacial cycles have remained unclear. Here we report a high-resolution record of dust and iron supply to the Southern Ocean over the past four million years, derived from the analysis of marine sediments from ODP Site 1090, located in the Atlantic sector of the subantarctic zone. The close correspondence of our dust and iron deposition records with Antarctic ice core reconstructions of dust flux covering the past 800,000 years (Lambert et al., 2008, doi:10.1038/nature06763; Wolf et al., 2006, doi:10.1038/nature04614) indicates that both of these archives record large-scale deposition changes that should apply to most of the Southern Ocean, validating previous interpretations of the ice core data. The extension of the record beyond the interval covered by the Antarctic ice cores reveals that, in contrast to the relatively gradual intensification of glacial cycles over the past three million years, Southern Ocean dust and iron flux rose sharply at the Mid-Pleistocene climatic transition around 1.25 million years ago. This finding complements previous observations over late ... Other/Unknown Material Antarc* Antarctic ice core South Atlantic Ocean Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(8.899817,8.899817,-42.913617,-42.913617) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
177-1090 COMPCORE Composite Core Joides Resolution Leg177 Ocean Drilling Program ODP South Atlantic Ocean |
spellingShingle |
177-1090 COMPCORE Composite Core Joides Resolution Leg177 Ocean Drilling Program ODP South Atlantic Ocean Martínez‐García, Alfredo Rosell-Melé, Antoni Jaccard, Samuel L Geibert, Walter Sigman, Daniel M Haug, Gerald H Accumulation rates of ODP Site 177-1090 |
topic_facet |
177-1090 COMPCORE Composite Core Joides Resolution Leg177 Ocean Drilling Program ODP South Atlantic Ocean |
description |
Dust has the potential to modify global climate by influencing the radiative balance of the atmosphere and by supplying iron and other essential limiting micronutrients to the ocean (Martin et al., 1990, doi:10.1038/345156a0; Martin, 1990, doi:10.1029/PA005i001p00001). Indeed, dust supply to the Southern Ocean increases during ice ages, and 'iron fertilization' of the subantarctic zone may have contributed up to 40 parts per million by volume (p.p.m.v.) of the decrease (80-100 p.p.m.v.) in atmospheric carbon dioxide observed during late Pleistocene glacial cycles (Watson et al., 2000, doi:10.1038/35037561; Kohfeld et al., 2005, doi:10.1126/science.1105375; Martínez-Garcia et al., 2009, doi:10.1029/2008PA001657; Sigman et al., 2010, doi:10.1038/nature09149; Hain et al., 2010, doi:10.1029/2010gb003790). So far, however, the magnitude of Southern Ocean dust deposition in earlier times and its role in the development and evolution of Pleistocene glacial cycles have remained unclear. Here we report a high-resolution record of dust and iron supply to the Southern Ocean over the past four million years, derived from the analysis of marine sediments from ODP Site 1090, located in the Atlantic sector of the subantarctic zone. The close correspondence of our dust and iron deposition records with Antarctic ice core reconstructions of dust flux covering the past 800,000 years (Lambert et al., 2008, doi:10.1038/nature06763; Wolf et al., 2006, doi:10.1038/nature04614) indicates that both of these archives record large-scale deposition changes that should apply to most of the Southern Ocean, validating previous interpretations of the ice core data. The extension of the record beyond the interval covered by the Antarctic ice cores reveals that, in contrast to the relatively gradual intensification of glacial cycles over the past three million years, Southern Ocean dust and iron flux rose sharply at the Mid-Pleistocene climatic transition around 1.25 million years ago. This finding complements previous observations over late ... |
format |
Other/Unknown Material |
author |
Martínez‐García, Alfredo Rosell-Melé, Antoni Jaccard, Samuel L Geibert, Walter Sigman, Daniel M Haug, Gerald H |
author_facet |
Martínez‐García, Alfredo Rosell-Melé, Antoni Jaccard, Samuel L Geibert, Walter Sigman, Daniel M Haug, Gerald H |
author_sort |
Martínez‐García, Alfredo |
title |
Accumulation rates of ODP Site 177-1090 |
title_short |
Accumulation rates of ODP Site 177-1090 |
title_full |
Accumulation rates of ODP Site 177-1090 |
title_fullStr |
Accumulation rates of ODP Site 177-1090 |
title_full_unstemmed |
Accumulation rates of ODP Site 177-1090 |
title_sort |
accumulation rates of odp site 177-1090 |
publisher |
PANGAEA |
publishDate |
2011 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.767460 https://doi.org/10.1594/PANGAEA.767460 |
op_coverage |
LATITUDE: -42.913617 * LONGITUDE: 8.899817 * DATE/TIME START: 1997-12-25T00:00:00 * DATE/TIME END: 1997-12-25T00:00:00 |
long_lat |
ENVELOPE(8.899817,8.899817,-42.913617,-42.913617) |
genre |
Antarc* Antarctic ice core South Atlantic Ocean Southern Ocean |
genre_facet |
Antarc* Antarctic ice core South Atlantic Ocean Southern Ocean |
op_source |
Supplement to: Martínez‐García, Alfredo; Rosell-Melé, Antoni; Jaccard, Samuel L; Geibert, Walter; Sigman, Daniel M; Haug, Gerald H (2011): Southern Ocean dust-climate coupling over the past four million years. Nature, 476(7360), 312-316, https://doi.org/10.1038/nature10310 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.767460 https://doi.org/10.1594/PANGAEA.767460 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.76746010.1038/nature10310 |
_version_ |
1810493315694460928 |