Abrupt climate changes during the marine isotope stage 3 (MIS 3)

Autores
Agosta, Eduardo Andrés; Compagnucci, Rosa Hilda
Año de publicación
2016
Idioma
inglés
Tipo de recurso
parte de libro
Estado
versión aceptada
Descripción
Fil: Agosta, Eduardo Andrés. Pontificia Universidad Católica Argentina. Facultad de Ciencias Físicomatemática e Ingeniería. Equipo Interdisciplinario para el Estudio de Procesos Atmosféricos en el Cambio Global; Argentina
Fil: Agosta, Eduardo Andrés. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísica; Argentina
Fil: Agosta, Eduardo Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Compagnucci, Rosa Hilda. Pontificia Universidad Católica Argentina. Facultad de Ciencias Físicomatemática e Ingeniería. Equipo Interdisciplinario para el Estudio de Procesos Atmosféricos en el Cambio Global; Argentina
Abstract The climate in the North Atlantic Ocean during the Marine Isotope Stage 3 (MIS 3)—roughly between 80,000 years before present (B.P.) and 20,000 years B.P., within the last glacial period—is characterized by great instability, with opposing climate transitions including at least six colder Heinrich (H) events and fourteen warmer Dansgaard–Oeschger (D-O) events. Periodic longer cooling cycles encompassing two D-O events and ending in a colder Heinrich episode occurred lasting about 10 to 15 ky each, known as the Bond cycle. Heinrich events occurred less frequently than D-O events. These were recurrent every 1.5 ky on average, while *10 ky elapsed between two H events. Neither of the two types of events is strictly periodical, however. After H events abrupt shifted to warmer climate, the D-O events followed immediately. During an H event, abnormally large amounts of rock debris transported by icebergs were deposited as layers at the bottom of the North Atlantic Ocean. The various theories on the causes include factors internal to the dynamics of ice sheets, and external factors such as changes in the solar flux and changes in the Atlantic Meridional Overturning Circulation (AMOC). The latter is the most robust hypothesis. At certain times, these ice sheets released large amounts of freshwater into the North Atlantic Ocean. Heinrich events are an extreme example of this, when the Laurentide ice sheet disgorged excessively large amounts of freshwater into the Labrador Sea in the form of icebergs. These freshwater dumps reduced ocean salinity enough to slow down deep-water formation and AMOC. Since AMOC plays an important role in transporting heat northward, a slowdown would cause the North Atlantic Ocean to cool. Later, as the addition of freshwater decreased, ocean salinity and deep-water formation increased and climate conditions recovered. During the D-O events, the high-latitude warming occurred abruptly (probably in decades to centuries), reaching temperatures close to interglacial conditions. Even though H and D-O events seemed to have been initiated in the North Atlantic Ocean, they had a global footprint. Global climate anomalies were consistent with a slowdown of AMOC and reduced ocean heat transport into the northern high latitudes. The bipolar pattern with warming conditions in the Northern Hemisphere (NH) and cooling in the Southern Hemisphere (SH) is discussed from the information published by various authors who have used the limited data available for the SH, and palaeoclimatic simulations obtained by numerical modelling. Results show that the SH mid-latitude anomalies presented much smaller magnitude than those of the NH.
Fuente
Gasparini, G., Rabassa, J., Deschamps, C., Tonni, E. (eds). Marine Isotope Stage 3 in Southern South America, 60 KA B.P.-30 KA B.P.. Springer Earth System Sciences. Springer, Cham.
Materia
CAMBIO CLIMATICO
OCEANO ATLANTICO
ISOTOPOS MARINOS
CIRCULACION OCEANICA
CIRCULACION ATMOSFERICA
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
Repositorio Institucional (UCA)
Institución
Pontificia Universidad Católica Argentina
OAI Identificador
oai:ucacris:123456789/18052

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network_name_str Repositorio Institucional (UCA)
spelling Abrupt climate changes during the marine isotope stage 3 (MIS 3)Agosta, Eduardo AndrésCompagnucci, Rosa HildaCAMBIO CLIMATICOOCEANO ATLANTICOISOTOPOS MARINOSCIRCULACION OCEANICACIRCULACION ATMOSFERICAFil: Agosta, Eduardo Andrés. Pontificia Universidad Católica Argentina. Facultad de Ciencias Físicomatemática e Ingeniería. Equipo Interdisciplinario para el Estudio de Procesos Atmosféricos en el Cambio Global; ArgentinaFil: Agosta, Eduardo Andrés. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísica; ArgentinaFil: Agosta, Eduardo Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Compagnucci, Rosa Hilda. Pontificia Universidad Católica Argentina. Facultad de Ciencias Físicomatemática e Ingeniería. Equipo Interdisciplinario para el Estudio de Procesos Atmosféricos en el Cambio Global; ArgentinaAbstract The climate in the North Atlantic Ocean during the Marine Isotope Stage 3 (MIS 3)—roughly between 80,000 years before present (B.P.) and 20,000 years B.P., within the last glacial period—is characterized by great instability, with opposing climate transitions including at least six colder Heinrich (H) events and fourteen warmer Dansgaard–Oeschger (D-O) events. Periodic longer cooling cycles encompassing two D-O events and ending in a colder Heinrich episode occurred lasting about 10 to 15 ky each, known as the Bond cycle. Heinrich events occurred less frequently than D-O events. These were recurrent every 1.5 ky on average, while *10 ky elapsed between two H events. Neither of the two types of events is strictly periodical, however. After H events abrupt shifted to warmer climate, the D-O events followed immediately. During an H event, abnormally large amounts of rock debris transported by icebergs were deposited as layers at the bottom of the North Atlantic Ocean. The various theories on the causes include factors internal to the dynamics of ice sheets, and external factors such as changes in the solar flux and changes in the Atlantic Meridional Overturning Circulation (AMOC). The latter is the most robust hypothesis. At certain times, these ice sheets released large amounts of freshwater into the North Atlantic Ocean. Heinrich events are an extreme example of this, when the Laurentide ice sheet disgorged excessively large amounts of freshwater into the Labrador Sea in the form of icebergs. These freshwater dumps reduced ocean salinity enough to slow down deep-water formation and AMOC. Since AMOC plays an important role in transporting heat northward, a slowdown would cause the North Atlantic Ocean to cool. Later, as the addition of freshwater decreased, ocean salinity and deep-water formation increased and climate conditions recovered. During the D-O events, the high-latitude warming occurred abruptly (probably in decades to centuries), reaching temperatures close to interglacial conditions. Even though H and D-O events seemed to have been initiated in the North Atlantic Ocean, they had a global footprint. Global climate anomalies were consistent with a slowdown of AMOC and reduced ocean heat transport into the northern high latitudes. The bipolar pattern with warming conditions in the Northern Hemisphere (NH) and cooling in the Southern Hemisphere (SH) is discussed from the information published by various authors who have used the limited data available for the SH, and palaeoclimatic simulations obtained by numerical modelling. Results show that the SH mid-latitude anomalies presented much smaller magnitude than those of the NH.Springer Earth System Sciences2016info:eu-repo/semantics/bookPartinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_3248info:ar-repo/semantics/parteDeLibroapplication/pdfhttps://repositorio.uca.edu.ar/handle/123456789/180529783319400006 (online)9783319399980 (impreso)10.1007/978-3-319-40000-6_5Agosta, E.A., Compagnucci, R.H. (2016). Abrupt climate changes during the marine isotope stage 3 (MIS 3). Postprint del capítulo publicado en: Gasparini, G., Rabassa, J., Deschamps, C., Tonni, E. (eds). Marine Isotope Stage 3 in Southern South America, 60 KA B.P.-30 KA B.P.. Springer Earth System Sciences. Springer, Cham. doi:10.1007/978-3-319-40000-6_5. Disponible en: https://repositorio.uca.edu.ar/handle/123456789/18052Gasparini, G., Rabassa, J., Deschamps, C., Tonni, E. (eds). Marine Isotope Stage 3 in Southern South America, 60 KA B.P.-30 KA B.P.. Springer Earth System Sciences. Springer, Cham.reponame:Repositorio Institucional (UCA)instname:Pontificia Universidad Católica Argentinaenginfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/4.0/2025-07-03T10:59:46Zoai:ucacris:123456789/18052instacron:UCAInstitucionalhttps://repositorio.uca.edu.ar/Universidad privadaNo correspondehttps://repositorio.uca.edu.ar/oaiclaudia_fernandez@uca.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:25852025-07-03 10:59:46.602Repositorio Institucional (UCA) - Pontificia Universidad Católica Argentinafalse
dc.title.none.fl_str_mv Abrupt climate changes during the marine isotope stage 3 (MIS 3)
title Abrupt climate changes during the marine isotope stage 3 (MIS 3)
spellingShingle Abrupt climate changes during the marine isotope stage 3 (MIS 3)
Agosta, Eduardo Andrés
CAMBIO CLIMATICO
OCEANO ATLANTICO
ISOTOPOS MARINOS
CIRCULACION OCEANICA
CIRCULACION ATMOSFERICA
title_short Abrupt climate changes during the marine isotope stage 3 (MIS 3)
title_full Abrupt climate changes during the marine isotope stage 3 (MIS 3)
title_fullStr Abrupt climate changes during the marine isotope stage 3 (MIS 3)
title_full_unstemmed Abrupt climate changes during the marine isotope stage 3 (MIS 3)
title_sort Abrupt climate changes during the marine isotope stage 3 (MIS 3)
dc.creator.none.fl_str_mv Agosta, Eduardo Andrés
Compagnucci, Rosa Hilda
author Agosta, Eduardo Andrés
author_facet Agosta, Eduardo Andrés
Compagnucci, Rosa Hilda
author_role author
author2 Compagnucci, Rosa Hilda
author2_role author
dc.subject.none.fl_str_mv CAMBIO CLIMATICO
OCEANO ATLANTICO
ISOTOPOS MARINOS
CIRCULACION OCEANICA
CIRCULACION ATMOSFERICA
topic CAMBIO CLIMATICO
OCEANO ATLANTICO
ISOTOPOS MARINOS
CIRCULACION OCEANICA
CIRCULACION ATMOSFERICA
dc.description.none.fl_txt_mv Fil: Agosta, Eduardo Andrés. Pontificia Universidad Católica Argentina. Facultad de Ciencias Físicomatemática e Ingeniería. Equipo Interdisciplinario para el Estudio de Procesos Atmosféricos en el Cambio Global; Argentina
Fil: Agosta, Eduardo Andrés. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísica; Argentina
Fil: Agosta, Eduardo Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Compagnucci, Rosa Hilda. Pontificia Universidad Católica Argentina. Facultad de Ciencias Físicomatemática e Ingeniería. Equipo Interdisciplinario para el Estudio de Procesos Atmosféricos en el Cambio Global; Argentina
Abstract The climate in the North Atlantic Ocean during the Marine Isotope Stage 3 (MIS 3)—roughly between 80,000 years before present (B.P.) and 20,000 years B.P., within the last glacial period—is characterized by great instability, with opposing climate transitions including at least six colder Heinrich (H) events and fourteen warmer Dansgaard–Oeschger (D-O) events. Periodic longer cooling cycles encompassing two D-O events and ending in a colder Heinrich episode occurred lasting about 10 to 15 ky each, known as the Bond cycle. Heinrich events occurred less frequently than D-O events. These were recurrent every 1.5 ky on average, while *10 ky elapsed between two H events. Neither of the two types of events is strictly periodical, however. After H events abrupt shifted to warmer climate, the D-O events followed immediately. During an H event, abnormally large amounts of rock debris transported by icebergs were deposited as layers at the bottom of the North Atlantic Ocean. The various theories on the causes include factors internal to the dynamics of ice sheets, and external factors such as changes in the solar flux and changes in the Atlantic Meridional Overturning Circulation (AMOC). The latter is the most robust hypothesis. At certain times, these ice sheets released large amounts of freshwater into the North Atlantic Ocean. Heinrich events are an extreme example of this, when the Laurentide ice sheet disgorged excessively large amounts of freshwater into the Labrador Sea in the form of icebergs. These freshwater dumps reduced ocean salinity enough to slow down deep-water formation and AMOC. Since AMOC plays an important role in transporting heat northward, a slowdown would cause the North Atlantic Ocean to cool. Later, as the addition of freshwater decreased, ocean salinity and deep-water formation increased and climate conditions recovered. During the D-O events, the high-latitude warming occurred abruptly (probably in decades to centuries), reaching temperatures close to interglacial conditions. Even though H and D-O events seemed to have been initiated in the North Atlantic Ocean, they had a global footprint. Global climate anomalies were consistent with a slowdown of AMOC and reduced ocean heat transport into the northern high latitudes. The bipolar pattern with warming conditions in the Northern Hemisphere (NH) and cooling in the Southern Hemisphere (SH) is discussed from the information published by various authors who have used the limited data available for the SH, and palaeoclimatic simulations obtained by numerical modelling. Results show that the SH mid-latitude anomalies presented much smaller magnitude than those of the NH.
description Fil: Agosta, Eduardo Andrés. Pontificia Universidad Católica Argentina. Facultad de Ciencias Físicomatemática e Ingeniería. Equipo Interdisciplinario para el Estudio de Procesos Atmosféricos en el Cambio Global; Argentina
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/bookPart
info:eu-repo/semantics/acceptedVersion
http://purl.org/coar/resource_type/c_3248
info:ar-repo/semantics/parteDeLibro
format bookPart
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://repositorio.uca.edu.ar/handle/123456789/18052
9783319400006 (online)
9783319399980 (impreso)
10.1007/978-3-319-40000-6_5
Agosta, E.A., Compagnucci, R.H. (2016). Abrupt climate changes during the marine isotope stage 3 (MIS 3). Postprint del capítulo publicado en: Gasparini, G., Rabassa, J., Deschamps, C., Tonni, E. (eds). Marine Isotope Stage 3 in Southern South America, 60 KA B.P.-30 KA B.P.. Springer Earth System Sciences. Springer, Cham. doi:10.1007/978-3-319-40000-6_5. Disponible en: https://repositorio.uca.edu.ar/handle/123456789/18052
url https://repositorio.uca.edu.ar/handle/123456789/18052
identifier_str_mv 9783319400006 (online)
9783319399980 (impreso)
10.1007/978-3-319-40000-6_5
Agosta, E.A., Compagnucci, R.H. (2016). Abrupt climate changes during the marine isotope stage 3 (MIS 3). Postprint del capítulo publicado en: Gasparini, G., Rabassa, J., Deschamps, C., Tonni, E. (eds). Marine Isotope Stage 3 in Southern South America, 60 KA B.P.-30 KA B.P.. Springer Earth System Sciences. Springer, Cham. doi:10.1007/978-3-319-40000-6_5. Disponible en: https://repositorio.uca.edu.ar/handle/123456789/18052
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/4.0/
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer Earth System Sciences
publisher.none.fl_str_mv Springer Earth System Sciences
dc.source.none.fl_str_mv Gasparini, G., Rabassa, J., Deschamps, C., Tonni, E. (eds). Marine Isotope Stage 3 in Southern South America, 60 KA B.P.-30 KA B.P.. Springer Earth System Sciences. Springer, Cham.
reponame:Repositorio Institucional (UCA)
instname:Pontificia Universidad Católica Argentina
reponame_str Repositorio Institucional (UCA)
collection Repositorio Institucional (UCA)
instname_str Pontificia Universidad Católica Argentina
repository.name.fl_str_mv Repositorio Institucional (UCA) - Pontificia Universidad Católica Argentina
repository.mail.fl_str_mv claudia_fernandez@uca.edu.ar
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score 13.070432