The influence of variability in meridional over turning on global ocean circulation
The Atlantic Meridional Overturning circulation (AMOC) is an important global scale circulation and changes in AMOC can induce significant regional and global climate impacts. In this work, we study the stability of AMOC and its influence on global ocean circulation and the surface climate though an...
Published in: | Journal of Climate |
---|---|
Main Authors: | , , , , |
Language: | unknown |
Published: |
2022
|
Subjects: | |
Online Access: | http://www.osti.gov/servlets/purl/1827725 https://www.osti.gov/biblio/1827725 https://doi.org/10.1175/jcli-d-21-0119.1 |
id |
ftosti:oai:osti.gov:1827725 |
---|---|
record_format |
openpolar |
spelling |
ftosti:oai:osti.gov:1827725 2023-07-30T04:02:41+02:00 The influence of variability in meridional over turning on global ocean circulation Hu, Aixue Meehl, Gerald A. Rosenbloom, Nan Molina, Maria J. Strand, Warren. G. 2022-09-30 application/pdf http://www.osti.gov/servlets/purl/1827725 https://www.osti.gov/biblio/1827725 https://doi.org/10.1175/jcli-d-21-0119.1 unknown http://www.osti.gov/servlets/purl/1827725 https://www.osti.gov/biblio/1827725 https://doi.org/10.1175/jcli-d-21-0119.1 doi:10.1175/jcli-d-21-0119.1 54 ENVIRONMENTAL SCIENCES 2022 ftosti https://doi.org/10.1175/jcli-d-21-0119.1 2023-07-11T10:07:56Z The Atlantic Meridional Overturning circulation (AMOC) is an important global scale circulation and changes in AMOC can induce significant regional and global climate impacts. In this work, we study the stability of AMOC and its influence on global ocean circulation and the surface climate though analyzing a set of sensitivity experiments using the Community Climate System Model version 1 (CESM1). Results show that a collapsed AMOC can induce changes in global ocean circulation, such as reduced (or reversed) Bering Strait transport, weakened Indonesia throughflow and Agulhas current, but strengthened Drake Passage transport. It also changes the global wind pattern and surface temperature, such as a seesaw-like surface temperature change between Northern and Southern Hemispheres, a weakening of Indian-Australia summer monsoon, a southward shift of the Southern ocean westerlies, etc. We also found that AMOC and the Pacific deep meridional overturning circulation (or PMOC) do not form a natural seesaw under modern day climate and geography. A collapsed AMOC (active PMOC) is not stable under modern conditions if there is no additional freshwater (salt) input in the subpolar North Atlantic (Pacific), suggesting that the modern mean state of AMOC (PMOC) does not depend on local haline forcing although its variability and changes do. Other/Unknown Material Bering Strait Drake Passage North Atlantic Southern Ocean SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Southern Ocean Drake Passage Bering Strait Pacific Indian Journal of Climate 1 53 |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Hu, Aixue Meehl, Gerald A. Rosenbloom, Nan Molina, Maria J. Strand, Warren. G. The influence of variability in meridional over turning on global ocean circulation |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
The Atlantic Meridional Overturning circulation (AMOC) is an important global scale circulation and changes in AMOC can induce significant regional and global climate impacts. In this work, we study the stability of AMOC and its influence on global ocean circulation and the surface climate though analyzing a set of sensitivity experiments using the Community Climate System Model version 1 (CESM1). Results show that a collapsed AMOC can induce changes in global ocean circulation, such as reduced (or reversed) Bering Strait transport, weakened Indonesia throughflow and Agulhas current, but strengthened Drake Passage transport. It also changes the global wind pattern and surface temperature, such as a seesaw-like surface temperature change between Northern and Southern Hemispheres, a weakening of Indian-Australia summer monsoon, a southward shift of the Southern ocean westerlies, etc. We also found that AMOC and the Pacific deep meridional overturning circulation (or PMOC) do not form a natural seesaw under modern day climate and geography. A collapsed AMOC (active PMOC) is not stable under modern conditions if there is no additional freshwater (salt) input in the subpolar North Atlantic (Pacific), suggesting that the modern mean state of AMOC (PMOC) does not depend on local haline forcing although its variability and changes do. |
author |
Hu, Aixue Meehl, Gerald A. Rosenbloom, Nan Molina, Maria J. Strand, Warren. G. |
author_facet |
Hu, Aixue Meehl, Gerald A. Rosenbloom, Nan Molina, Maria J. Strand, Warren. G. |
author_sort |
Hu, Aixue |
title |
The influence of variability in meridional over turning on global ocean circulation |
title_short |
The influence of variability in meridional over turning on global ocean circulation |
title_full |
The influence of variability in meridional over turning on global ocean circulation |
title_fullStr |
The influence of variability in meridional over turning on global ocean circulation |
title_full_unstemmed |
The influence of variability in meridional over turning on global ocean circulation |
title_sort |
influence of variability in meridional over turning on global ocean circulation |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1827725 https://www.osti.gov/biblio/1827725 https://doi.org/10.1175/jcli-d-21-0119.1 |
geographic |
Southern Ocean Drake Passage Bering Strait Pacific Indian |
geographic_facet |
Southern Ocean Drake Passage Bering Strait Pacific Indian |
genre |
Bering Strait Drake Passage North Atlantic Southern Ocean |
genre_facet |
Bering Strait Drake Passage North Atlantic Southern Ocean |
op_relation |
http://www.osti.gov/servlets/purl/1827725 https://www.osti.gov/biblio/1827725 https://doi.org/10.1175/jcli-d-21-0119.1 doi:10.1175/jcli-d-21-0119.1 |
op_doi |
https://doi.org/10.1175/jcli-d-21-0119.1 |
container_title |
Journal of Climate |
container_start_page |
1 |
op_container_end_page |
53 |
_version_ |
1772813512697970688 |