Abrupt Climate Changes During the Marine Isotope Stage 3 (MIS 3)
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 (...
Main Authors: | , |
---|---|
Other Authors: | , , , |
Format: | Book Part |
Language: | English |
Published: |
Springer
|
Subjects: | |
Online Access: | http://hdl.handle.net/11336/96055 |
id |
ftconicet:oai:ri.conicet.gov.ar:11336/96055 |
---|---|
record_format |
openpolar |
spelling |
ftconicet:oai:ri.conicet.gov.ar:11336/96055 2023-10-09T21:50:59+02:00 Abrupt Climate Changes During the Marine Isotope Stage 3 (MIS 3) Agosta Scarel, Eduardo Andres Compagnucci, Rosa Hilda Gasparini, Germán Mariano Rabassa, Jorge Oscar Deschamps, Cecilia Marcela Tonni, Eduardo Pedro application/pdf application/zip http://hdl.handle.net/11336/96055 eng eng Springer info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/chapter/10.1007/978-3-319-40000-6_5 info:eu-repo/semantics/altIdentifier/doi/10.1007/978-3-319-40000-6_5 http://hdl.handle.net/11336/96055 Agosta Scarel, Eduardo Andres; Compagnucci, Rosa Hilda; Abrupt Climate Changes During the Marine Isotope Stage 3 (MIS 3); Springer; 2016; 81-106 978-3-319-39998-0 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ MIS 3 ABRUPT CLIMATIC CHANGE DANSGAARD-OESCHGER EVENTS HEINRICH EVENTS ICE DRIFT IN THE NORTH ATLANTIC OCEAN GISP2 OXYGEN ISOPTE OCEANIC CIRCULATION ATMOSHPERIC CIRCULATION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/bookPart info:ar-repo/semantics/parte de libro ftconicet https://doi.org/10.1007/978-3-319-40000-6_5 2023-09-24T20:13:38Z 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 ... Book Part Dansgaard-Oeschger events Ice Sheet Labrador Sea North Atlantic CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) 81 106 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
MIS 3 ABRUPT CLIMATIC CHANGE DANSGAARD-OESCHGER EVENTS HEINRICH EVENTS ICE DRIFT IN THE NORTH ATLANTIC OCEAN GISP2 OXYGEN ISOPTE OCEANIC CIRCULATION ATMOSHPERIC CIRCULATION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
MIS 3 ABRUPT CLIMATIC CHANGE DANSGAARD-OESCHGER EVENTS HEINRICH EVENTS ICE DRIFT IN THE NORTH ATLANTIC OCEAN GISP2 OXYGEN ISOPTE OCEANIC CIRCULATION ATMOSHPERIC CIRCULATION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Agosta Scarel, Eduardo Andres Compagnucci, Rosa Hilda Abrupt Climate Changes During the Marine Isotope Stage 3 (MIS 3) |
topic_facet |
MIS 3 ABRUPT CLIMATIC CHANGE DANSGAARD-OESCHGER EVENTS HEINRICH EVENTS ICE DRIFT IN THE NORTH ATLANTIC OCEAN GISP2 OXYGEN ISOPTE OCEANIC CIRCULATION ATMOSHPERIC CIRCULATION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
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 ... |
author2 |
Gasparini, Germán Mariano Rabassa, Jorge Oscar Deschamps, Cecilia Marcela Tonni, Eduardo Pedro |
format |
Book Part |
author |
Agosta Scarel, Eduardo Andres Compagnucci, Rosa Hilda |
author_facet |
Agosta Scarel, Eduardo Andres Compagnucci, Rosa Hilda |
author_sort |
Agosta Scarel, Eduardo Andres |
title |
Abrupt Climate Changes During the Marine Isotope Stage 3 (MIS 3) |
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) |
publisher |
Springer |
url |
http://hdl.handle.net/11336/96055 |
genre |
Dansgaard-Oeschger events Ice Sheet Labrador Sea North Atlantic |
genre_facet |
Dansgaard-Oeschger events Ice Sheet Labrador Sea North Atlantic |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/chapter/10.1007/978-3-319-40000-6_5 info:eu-repo/semantics/altIdentifier/doi/10.1007/978-3-319-40000-6_5 http://hdl.handle.net/11336/96055 Agosta Scarel, Eduardo Andres; Compagnucci, Rosa Hilda; Abrupt Climate Changes During the Marine Isotope Stage 3 (MIS 3); Springer; 2016; 81-106 978-3-319-39998-0 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1007/978-3-319-40000-6_5 |
container_start_page |
81 |
op_container_end_page |
106 |
_version_ |
1779314082830090240 |