Different mechanisms of the hysteresis of the Atlantic Meridional Overturning Circulation in the modern and glacial climates ...
<!--!introduction!--> The multiple equilibrium behavior of the Atlantic meridional overturning circulation (AMOC) is related to the mode transition of the AMOC, which played an important role in abrupt glacial climate changes. However, the difference between modern and glacial climates is not...
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GFZ German Research Centre for Geosciences
2023
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ftdatacite:10.57757/iugg23-2712 2023-07-23T04:21:42+02:00 Different mechanisms of the hysteresis of the Atlantic Meridional Overturning Circulation in the modern and glacial climates ... Ando, Taigo Oka, Akira 2023 https://dx.doi.org/10.57757/iugg23-2712 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019179 unknown GFZ German Research Centre for Geosciences Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 Article ConferencePaper Oral 2023 ftdatacite https://doi.org/10.57757/iugg23-2712 2023-07-03T18:50:07Z <!--!introduction!--> The multiple equilibrium behavior of the Atlantic meridional overturning circulation (AMOC) is related to the mode transition of the AMOC, which played an important role in abrupt glacial climate changes. However, the difference between modern and glacial climates is not well understood. Here, we examined the structure of the multiple equilibria of the AMOC under the modern and glacial climates through hysteresis experiments using an earth system model of intermediate complexity. The glacial AMOC exhibited a shallower AMOC mode but not the off mode, and a narrower range of multiple equilibria than the modern AMOC. This glacial hysteresis behavior occurred associated with a shift of deep water formation due to changes in surface air temperature and sea ice, whereas that of the modern AMOC is attributed to the basin-scale salinity feedback. These features were commonly found in two glacial simulations with different strengths of the AMOC at the Last Glacial Maximum. ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... Conference Object Sea ice DataCite Metadata Store (German National Library of Science and Technology) |
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<!--!introduction!--> The multiple equilibrium behavior of the Atlantic meridional overturning circulation (AMOC) is related to the mode transition of the AMOC, which played an important role in abrupt glacial climate changes. However, the difference between modern and glacial climates is not well understood. Here, we examined the structure of the multiple equilibria of the AMOC under the modern and glacial climates through hysteresis experiments using an earth system model of intermediate complexity. The glacial AMOC exhibited a shallower AMOC mode but not the off mode, and a narrower range of multiple equilibria than the modern AMOC. This glacial hysteresis behavior occurred associated with a shift of deep water formation due to changes in surface air temperature and sea ice, whereas that of the modern AMOC is attributed to the basin-scale salinity feedback. These features were commonly found in two glacial simulations with different strengths of the AMOC at the Last Glacial Maximum. ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
format |
Conference Object |
author |
Ando, Taigo Oka, Akira |
spellingShingle |
Ando, Taigo Oka, Akira Different mechanisms of the hysteresis of the Atlantic Meridional Overturning Circulation in the modern and glacial climates ... |
author_facet |
Ando, Taigo Oka, Akira |
author_sort |
Ando, Taigo |
title |
Different mechanisms of the hysteresis of the Atlantic Meridional Overturning Circulation in the modern and glacial climates ... |
title_short |
Different mechanisms of the hysteresis of the Atlantic Meridional Overturning Circulation in the modern and glacial climates ... |
title_full |
Different mechanisms of the hysteresis of the Atlantic Meridional Overturning Circulation in the modern and glacial climates ... |
title_fullStr |
Different mechanisms of the hysteresis of the Atlantic Meridional Overturning Circulation in the modern and glacial climates ... |
title_full_unstemmed |
Different mechanisms of the hysteresis of the Atlantic Meridional Overturning Circulation in the modern and glacial climates ... |
title_sort |
different mechanisms of the hysteresis of the atlantic meridional overturning circulation in the modern and glacial climates ... |
publisher |
GFZ German Research Centre for Geosciences |
publishDate |
2023 |
url |
https://dx.doi.org/10.57757/iugg23-2712 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019179 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_doi |
https://doi.org/10.57757/iugg23-2712 |
_version_ |
1772187759100821504 |