Climate evolution across the Mid-Brunhes transition
The Mid-Brunhes Transition (MBT) began ∼ 430 ka with an increase in the amplitude of the 100 kyr climate cycles of the past 800 000 years. The MBT has been identified in ice-core records, which indicate interglaciations became warmer with higher atmospheric CO2 levels after the MBT, and benthic oxyg...
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ftrowanuniv:oai:rdw.rowan.edu:see_facpub-1036 2023-05-15T16:38:54+02:00 Climate evolution across the Mid-Brunhes transition Barth, Aaron M. Clark, Peter U. Bill, Nicholas S. He, Feng Pisias, Nicklas G. 2018-12-21T08:00:00Z application/pdf https://rdw.rowan.edu/see_facpub/36 https://rdw.rowan.edu/cgi/viewcontent.cgi?article=1036&context=see_facpub unknown Rowan Digital Works https://rdw.rowan.edu/see_facpub/36 https://rdw.rowan.edu/cgi/viewcontent.cgi?article=1036&context=see_facpub http://creativecommons.org/licenses/by/4.0/ CC-BY School of Earth & Environment Faculty Scholarship Climate Geology Glaciology article 2018 ftrowanuniv 2021-12-28T15:19:04Z The Mid-Brunhes Transition (MBT) began ∼ 430 ka with an increase in the amplitude of the 100 kyr climate cycles of the past 800 000 years. The MBT has been identified in ice-core records, which indicate interglaciations became warmer with higher atmospheric CO2 levels after the MBT, and benthic oxygen isotope (δ18O) records, which suggest that post-MBT interglaciations had higher sea levels and warmer temperatures than pre-MBT interglaciations. It remains unclear, however, whether the MBT was a globally synchronous phenomenon that included other components of the climate system. Here, we further characterize changes in the climate system across the MBT through statistical analyses of ice-core and δ18O records as well as sea-surface temperature, benthic carbon isotope, and dust accumulation records. Our results demonstrate that the MBT was a global event with a significant increase in climate variance in most components of the climate system assessed here. However, our results indicate that the onset of high-amplitude variability in temperature, atmospheric CO2, and sea level at ∼430 ka was preceded by changes in the carbon cycle, ice sheets, and monsoon strength during Marine Isotope Stage (MIS) 14 and MIS 13. Article in Journal/Newspaper ice core Rowan University: Rowan Digital Works |
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Open Polar |
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Rowan University: Rowan Digital Works |
op_collection_id |
ftrowanuniv |
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unknown |
topic |
Climate Geology Glaciology |
spellingShingle |
Climate Geology Glaciology Barth, Aaron M. Clark, Peter U. Bill, Nicholas S. He, Feng Pisias, Nicklas G. Climate evolution across the Mid-Brunhes transition |
topic_facet |
Climate Geology Glaciology |
description |
The Mid-Brunhes Transition (MBT) began ∼ 430 ka with an increase in the amplitude of the 100 kyr climate cycles of the past 800 000 years. The MBT has been identified in ice-core records, which indicate interglaciations became warmer with higher atmospheric CO2 levels after the MBT, and benthic oxygen isotope (δ18O) records, which suggest that post-MBT interglaciations had higher sea levels and warmer temperatures than pre-MBT interglaciations. It remains unclear, however, whether the MBT was a globally synchronous phenomenon that included other components of the climate system. Here, we further characterize changes in the climate system across the MBT through statistical analyses of ice-core and δ18O records as well as sea-surface temperature, benthic carbon isotope, and dust accumulation records. Our results demonstrate that the MBT was a global event with a significant increase in climate variance in most components of the climate system assessed here. However, our results indicate that the onset of high-amplitude variability in temperature, atmospheric CO2, and sea level at ∼430 ka was preceded by changes in the carbon cycle, ice sheets, and monsoon strength during Marine Isotope Stage (MIS) 14 and MIS 13. |
format |
Article in Journal/Newspaper |
author |
Barth, Aaron M. Clark, Peter U. Bill, Nicholas S. He, Feng Pisias, Nicklas G. |
author_facet |
Barth, Aaron M. Clark, Peter U. Bill, Nicholas S. He, Feng Pisias, Nicklas G. |
author_sort |
Barth, Aaron M. |
title |
Climate evolution across the Mid-Brunhes transition |
title_short |
Climate evolution across the Mid-Brunhes transition |
title_full |
Climate evolution across the Mid-Brunhes transition |
title_fullStr |
Climate evolution across the Mid-Brunhes transition |
title_full_unstemmed |
Climate evolution across the Mid-Brunhes transition |
title_sort |
climate evolution across the mid-brunhes transition |
publisher |
Rowan Digital Works |
publishDate |
2018 |
url |
https://rdw.rowan.edu/see_facpub/36 https://rdw.rowan.edu/cgi/viewcontent.cgi?article=1036&context=see_facpub |
genre |
ice core |
genre_facet |
ice core |
op_source |
School of Earth & Environment Faculty Scholarship |
op_relation |
https://rdw.rowan.edu/see_facpub/36 https://rdw.rowan.edu/cgi/viewcontent.cgi?article=1036&context=see_facpub |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766029253684494336 |