Environmental magnetism of Antarctic Late Pleistocene sediments and interhemispheric correlation of climatic events
Recent developments in paleomagnetism and environmental magnetism provide new tools for the detailed correlation of climatically induced magnetic mineralogy changes in sedimentary sequences. Studies of these changes contribute to the reconstruction of climate history for the glacial^interglacial cyc...
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ftingv:oai:www.earth-prints.org:2122/3943 2023-05-15T13:51:39+02:00 Environmental magnetism of Antarctic Late Pleistocene sediments and interhemispheric correlation of climatic events Sagnotti, L. Macrì, P. Camerlenghi, A. Rebesco, M. Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Macrì, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Camerlenghi, A.; Istituto Nazionale di Oceanografia e di Geofisica Sperimentale Rebesco, M.; Istituto Nazionale di Oceanografia e di Geofisica Sperimentale Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Istituto Nazionale di Oceanografia e di Geofisica Sperimentale 2001-07 http://hdl.handle.net/2122/3943 en eng Elsevier Earth and Planetary Science Letters / 192 (2001) http://hdl.handle.net/2122/3943 restricted paleomagnetism paleointensity Antarctica Heinrich events climatic correlation 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism article 2001 ftingv 2022-07-29T06:04:55Z Recent developments in paleomagnetism and environmental magnetism provide new tools for the detailed correlation of climatically induced magnetic mineralogy changes in sedimentary sequences. Studies of these changes contribute to the reconstruction of climate history for the glacial^interglacial cycles of the Late Pleistocene and to the delineation of the range of natural variability for global climate during the past hundred thousands years. Here we show that sharp coercivity minima observed in fine-grained sediments from the continental rise of the western Antarctic Peninsula correlate to the major rapid cooling events of the northern Atlantic (Heinrich layers). We interpret such an environmental magnetic signal in terms of variations in deep sea diagenetic processes of sulfide formation, which reflect changes in the input of detrital organic matter controlled by sea-ice extent. With the inherent uncertainties in age controls, the sedimentary paleoclimatic markers of the two hemispheres are almost contemporaneous, but interhemispheric time lags or leads of the order of 1-2 kyr (such as those recently reported from the Greenland and Antarctic ice cores) are also compatible with the data. Published 65-80 2.2. Laboratorio di paleomagnetismo JCR Journal reserved Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Greenland Sea ice Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Antarctic Antarctic Peninsula Greenland |
institution |
Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftingv |
language |
English |
topic |
paleomagnetism paleointensity Antarctica Heinrich events climatic correlation 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism |
spellingShingle |
paleomagnetism paleointensity Antarctica Heinrich events climatic correlation 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism Sagnotti, L. Macrì, P. Camerlenghi, A. Rebesco, M. Environmental magnetism of Antarctic Late Pleistocene sediments and interhemispheric correlation of climatic events |
topic_facet |
paleomagnetism paleointensity Antarctica Heinrich events climatic correlation 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism |
description |
Recent developments in paleomagnetism and environmental magnetism provide new tools for the detailed correlation of climatically induced magnetic mineralogy changes in sedimentary sequences. Studies of these changes contribute to the reconstruction of climate history for the glacial^interglacial cycles of the Late Pleistocene and to the delineation of the range of natural variability for global climate during the past hundred thousands years. Here we show that sharp coercivity minima observed in fine-grained sediments from the continental rise of the western Antarctic Peninsula correlate to the major rapid cooling events of the northern Atlantic (Heinrich layers). We interpret such an environmental magnetic signal in terms of variations in deep sea diagenetic processes of sulfide formation, which reflect changes in the input of detrital organic matter controlled by sea-ice extent. With the inherent uncertainties in age controls, the sedimentary paleoclimatic markers of the two hemispheres are almost contemporaneous, but interhemispheric time lags or leads of the order of 1-2 kyr (such as those recently reported from the Greenland and Antarctic ice cores) are also compatible with the data. Published 65-80 2.2. Laboratorio di paleomagnetismo JCR Journal reserved |
author2 |
Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Macrì, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Camerlenghi, A.; Istituto Nazionale di Oceanografia e di Geofisica Sperimentale Rebesco, M.; Istituto Nazionale di Oceanografia e di Geofisica Sperimentale Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Istituto Nazionale di Oceanografia e di Geofisica Sperimentale |
format |
Article in Journal/Newspaper |
author |
Sagnotti, L. Macrì, P. Camerlenghi, A. Rebesco, M. |
author_facet |
Sagnotti, L. Macrì, P. Camerlenghi, A. Rebesco, M. |
author_sort |
Sagnotti, L. |
title |
Environmental magnetism of Antarctic Late Pleistocene sediments and interhemispheric correlation of climatic events |
title_short |
Environmental magnetism of Antarctic Late Pleistocene sediments and interhemispheric correlation of climatic events |
title_full |
Environmental magnetism of Antarctic Late Pleistocene sediments and interhemispheric correlation of climatic events |
title_fullStr |
Environmental magnetism of Antarctic Late Pleistocene sediments and interhemispheric correlation of climatic events |
title_full_unstemmed |
Environmental magnetism of Antarctic Late Pleistocene sediments and interhemispheric correlation of climatic events |
title_sort |
environmental magnetism of antarctic late pleistocene sediments and interhemispheric correlation of climatic events |
publisher |
Elsevier |
publishDate |
2001 |
url |
http://hdl.handle.net/2122/3943 |
geographic |
Antarctic Antarctic Peninsula Greenland |
geographic_facet |
Antarctic Antarctic Peninsula Greenland |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Greenland Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Greenland Sea ice |
op_relation |
Earth and Planetary Science Letters / 192 (2001) http://hdl.handle.net/2122/3943 |
op_rights |
restricted |
_version_ |
1766255660944588800 |