Deep-Sea Temperature and Ice Volume Changes Across the Pliocene-Pleistocene Climate Transitions
Stepping Down Earth's environment changed markedly over the past 5.2 million years, when a permanent ice sheet has developed in the Northern Hemisphere and the glacial cycle has changed its period from roughly every 40,000 years to the dominantly 100,000-year duration of the past half-million y...
Published in: | Science |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Association for the Advancement of Science (AAAS)
2009
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1126/science.1169938 https://www.science.org/doi/pdf/10.1126/science.1169938 |
id |
craaas:10.1126/science.1169938 |
---|---|
record_format |
openpolar |
spelling |
craaas:10.1126/science.1169938 2024-09-30T14:36:36+00:00 Deep-Sea Temperature and Ice Volume Changes Across the Pliocene-Pleistocene Climate Transitions Sosdian, Sindia Rosenthal, Yair 2009 http://dx.doi.org/10.1126/science.1169938 https://www.science.org/doi/pdf/10.1126/science.1169938 en eng American Association for the Advancement of Science (AAAS) Science volume 325, issue 5938, page 306-310 ISSN 0036-8075 1095-9203 journal-article 2009 craaas https://doi.org/10.1126/science.1169938 2024-09-05T04:01:17Z Stepping Down Earth's environment changed markedly over the past 5.2 million years, when a permanent ice sheet has developed in the Northern Hemisphere and the glacial cycle has changed its period from roughly every 40,000 years to the dominantly 100,000-year duration of the past half-million years. One of the biggest questions about these changes is whether they were “threshold” responses to a gradual, uniform cooling trend or whether they represent reactions to discrete episodes of cooling. Sosdian and Rosenthal (p. 306 ) present deep-ocean temperature records from the North Atlantic that show that the cooling happened in distinct steps, at 3 to 2.5 million years ago and at 1.2 to 0.85 million years ago. Combining their record with that of deep ocean water oxygen isotopes allowed the distinction between effects due to global cooling and ice-sheet dynamics. Article in Journal/Newspaper Ice Sheet North Atlantic AAAS Resource Center (American Association for the Advancement of Science) Rosenthal ENVELOPE(-64.283,-64.283,-64.600,-64.600) Science 325 5938 306 310 |
institution |
Open Polar |
collection |
AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
Stepping Down Earth's environment changed markedly over the past 5.2 million years, when a permanent ice sheet has developed in the Northern Hemisphere and the glacial cycle has changed its period from roughly every 40,000 years to the dominantly 100,000-year duration of the past half-million years. One of the biggest questions about these changes is whether they were “threshold” responses to a gradual, uniform cooling trend or whether they represent reactions to discrete episodes of cooling. Sosdian and Rosenthal (p. 306 ) present deep-ocean temperature records from the North Atlantic that show that the cooling happened in distinct steps, at 3 to 2.5 million years ago and at 1.2 to 0.85 million years ago. Combining their record with that of deep ocean water oxygen isotopes allowed the distinction between effects due to global cooling and ice-sheet dynamics. |
format |
Article in Journal/Newspaper |
author |
Sosdian, Sindia Rosenthal, Yair |
spellingShingle |
Sosdian, Sindia Rosenthal, Yair Deep-Sea Temperature and Ice Volume Changes Across the Pliocene-Pleistocene Climate Transitions |
author_facet |
Sosdian, Sindia Rosenthal, Yair |
author_sort |
Sosdian, Sindia |
title |
Deep-Sea Temperature and Ice Volume Changes Across the Pliocene-Pleistocene Climate Transitions |
title_short |
Deep-Sea Temperature and Ice Volume Changes Across the Pliocene-Pleistocene Climate Transitions |
title_full |
Deep-Sea Temperature and Ice Volume Changes Across the Pliocene-Pleistocene Climate Transitions |
title_fullStr |
Deep-Sea Temperature and Ice Volume Changes Across the Pliocene-Pleistocene Climate Transitions |
title_full_unstemmed |
Deep-Sea Temperature and Ice Volume Changes Across the Pliocene-Pleistocene Climate Transitions |
title_sort |
deep-sea temperature and ice volume changes across the pliocene-pleistocene climate transitions |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2009 |
url |
http://dx.doi.org/10.1126/science.1169938 https://www.science.org/doi/pdf/10.1126/science.1169938 |
long_lat |
ENVELOPE(-64.283,-64.283,-64.600,-64.600) |
geographic |
Rosenthal |
geographic_facet |
Rosenthal |
genre |
Ice Sheet North Atlantic |
genre_facet |
Ice Sheet North Atlantic |
op_source |
Science volume 325, issue 5938, page 306-310 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.1169938 |
container_title |
Science |
container_volume |
325 |
container_issue |
5938 |
container_start_page |
306 |
op_container_end_page |
310 |
_version_ |
1811639639456350208 |