An assessment of Antarctic Circumpolar Current and Southern Ocean Meridional Overturning Circulation during 1958–2007 in a suite of interannual CORE-II simulations
In the framework of the second phase of the Coordinated Ocean-ice Reference Experiments (CORE-II), we present an analysis of the representation of the Antarctic Circumpolar Current (ACC) and Southern Ocean meridional overturning circulation (MOC) in a suite of seventeen global ocean–sea ice models....
Published in: | Ocean Modelling |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2015
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Online Access: | https://eprints.soton.ac.uk/381303/ |
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University of Southampton: e-Prints Soton |
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ftsouthampton |
language |
English |
description |
In the framework of the second phase of the Coordinated Ocean-ice Reference Experiments (CORE-II), we present an analysis of the representation of the Antarctic Circumpolar Current (ACC) and Southern Ocean meridional overturning circulation (MOC) in a suite of seventeen global ocean–sea ice models. We focus on the mean, variability and trends of both the ACC and MOC over the 1958–2007 period, and discuss their relationship with the surface forcing. We aim to quantify the degree of eddy saturation and eddy compensation in the models participating in CORE-II, and compare our results with available observations, previous fine-resolution numerical studies and theoretical constraints. Most models show weak ACC transport sensitivity to changes in forcing during the past five decades, and they can be considered to be in an eddy saturated regime. Larger contrasts arise when considering MOC trends, with a majority of models exhibiting significant strengthening of the MOC during the late 20th and early 21st century. Only a few models show a relatively small sensitivity to forcing changes, responding with an intensified eddy-induced circulation that provides some degree of eddy compensation, while still showing considerable decadal trends. Both ACC and MOC interannual variabilities are largely controlled by the Southern Annular Mode (SAM). Based on these results, models are clustered into two groups. Models with constant or two-dimensional (horizontal) specification of the eddy-induced advection coefficient ? show larger ocean interior decadal trends, larger ACC transport decadal trends and no eddy compensation in the MOC. Eddy-permitting models or models with a three-dimensional time varying ? show smaller changes in isopycnal slopes and associated ACC trends, and partial eddy compensation. As previously argued, a constant in time or space ? is responsible for a poor representation of mesoscale eddy effects and cannot properly simulate the sensitivity of the ACC and MOC to changing surface forcing. Evidence is given for a ... |
format |
Article in Journal/Newspaper |
author |
Farneti, Riccardo Downes, Stephanie M. Griffies, Stephen M. Marsland, Simon J. Behrens, Erik Bentsen, Mats Bi, Daohua Biastoch, Arne Böning, Claus Bozec, Alexandra Canuto, Vittorio M. Chassignet, Eric Danabasoglu, Gokhan Danilov, Sergey Diansky, Nikolay Drange, Helge Fogli, Pier Giuseppe Gusev, Anatoly Hallberg, Robert W. Howard, Armando Ilicak, Mehmet Jung, Thomas Kelley, Maxwell Large, William G. Leboissetier, Anthony Long, Matthew Lu, Jianhua Masina, Simona Mishra, Akhilesh Navarra, Antonio Nurser, A.J. George Patara, Lavinia Samuels, Bonita L. Sidorenko, Dmitry Tsujino, Hiroyuki Uotila, Petteri Wang, Qiang Yeager, Steve G. |
spellingShingle |
Farneti, Riccardo Downes, Stephanie M. Griffies, Stephen M. Marsland, Simon J. Behrens, Erik Bentsen, Mats Bi, Daohua Biastoch, Arne Böning, Claus Bozec, Alexandra Canuto, Vittorio M. Chassignet, Eric Danabasoglu, Gokhan Danilov, Sergey Diansky, Nikolay Drange, Helge Fogli, Pier Giuseppe Gusev, Anatoly Hallberg, Robert W. Howard, Armando Ilicak, Mehmet Jung, Thomas Kelley, Maxwell Large, William G. Leboissetier, Anthony Long, Matthew Lu, Jianhua Masina, Simona Mishra, Akhilesh Navarra, Antonio Nurser, A.J. George Patara, Lavinia Samuels, Bonita L. Sidorenko, Dmitry Tsujino, Hiroyuki Uotila, Petteri Wang, Qiang Yeager, Steve G. An assessment of Antarctic Circumpolar Current and Southern Ocean Meridional Overturning Circulation during 1958–2007 in a suite of interannual CORE-II simulations |
author_facet |
Farneti, Riccardo Downes, Stephanie M. Griffies, Stephen M. Marsland, Simon J. Behrens, Erik Bentsen, Mats Bi, Daohua Biastoch, Arne Böning, Claus Bozec, Alexandra Canuto, Vittorio M. Chassignet, Eric Danabasoglu, Gokhan Danilov, Sergey Diansky, Nikolay Drange, Helge Fogli, Pier Giuseppe Gusev, Anatoly Hallberg, Robert W. Howard, Armando Ilicak, Mehmet Jung, Thomas Kelley, Maxwell Large, William G. Leboissetier, Anthony Long, Matthew Lu, Jianhua Masina, Simona Mishra, Akhilesh Navarra, Antonio Nurser, A.J. George Patara, Lavinia Samuels, Bonita L. Sidorenko, Dmitry Tsujino, Hiroyuki Uotila, Petteri Wang, Qiang Yeager, Steve G. |
author_sort |
Farneti, Riccardo |
title |
An assessment of Antarctic Circumpolar Current and Southern Ocean Meridional Overturning Circulation during 1958–2007 in a suite of interannual CORE-II simulations |
title_short |
An assessment of Antarctic Circumpolar Current and Southern Ocean Meridional Overturning Circulation during 1958–2007 in a suite of interannual CORE-II simulations |
title_full |
An assessment of Antarctic Circumpolar Current and Southern Ocean Meridional Overturning Circulation during 1958–2007 in a suite of interannual CORE-II simulations |
title_fullStr |
An assessment of Antarctic Circumpolar Current and Southern Ocean Meridional Overturning Circulation during 1958–2007 in a suite of interannual CORE-II simulations |
title_full_unstemmed |
An assessment of Antarctic Circumpolar Current and Southern Ocean Meridional Overturning Circulation during 1958–2007 in a suite of interannual CORE-II simulations |
title_sort |
assessment of antarctic circumpolar current and southern ocean meridional overturning circulation during 1958–2007 in a suite of interannual core-ii simulations |
publishDate |
2015 |
url |
https://eprints.soton.ac.uk/381303/ |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_relation |
Farneti, Riccardo, Downes, Stephanie M., Griffies, Stephen M., Marsland, Simon J., Behrens, Erik, Bentsen, Mats, Bi, Daohua, Biastoch, Arne, Böning, Claus, Bozec, Alexandra, Canuto, Vittorio M., Chassignet, Eric, Danabasoglu, Gokhan, Danilov, Sergey, Diansky, Nikolay, Drange, Helge, Fogli, Pier Giuseppe, Gusev, Anatoly, Hallberg, Robert W., Howard, Armando, Ilicak, Mehmet, Jung, Thomas, Kelley, Maxwell, Large, William G., Leboissetier, Anthony, Long, Matthew, Lu, Jianhua, Masina, Simona, Mishra, Akhilesh, Navarra, Antonio, Nurser, A.J. George, Patara, Lavinia, Samuels, Bonita L., Sidorenko, Dmitry, Tsujino, Hiroyuki, Uotila, Petteri, Wang, Qiang and Yeager, Steve G. (2015) An assessment of Antarctic Circumpolar Current and Southern Ocean Meridional Overturning Circulation during 1958–2007 in a suite of interannual CORE-II simulations. Ocean Modelling, 93, 84-120. (doi:10.1016/j.ocemod.2015.07.009 <http://dx.doi.org/10.1016/j.ocemod.2015.07.009>). |
op_doi |
https://doi.org/10.1016/j.ocemod.2015.07.009 |
container_title |
Ocean Modelling |
container_volume |
93 |
container_start_page |
84 |
op_container_end_page |
120 |
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1772809998533918720 |
spelling |
ftsouthampton:oai:eprints.soton.ac.uk:381303 2023-07-30T03:59:15+02:00 An assessment of Antarctic Circumpolar Current and Southern Ocean Meridional Overturning Circulation during 1958–2007 in a suite of interannual CORE-II simulations Farneti, Riccardo Downes, Stephanie M. Griffies, Stephen M. Marsland, Simon J. Behrens, Erik Bentsen, Mats Bi, Daohua Biastoch, Arne Böning, Claus Bozec, Alexandra Canuto, Vittorio M. Chassignet, Eric Danabasoglu, Gokhan Danilov, Sergey Diansky, Nikolay Drange, Helge Fogli, Pier Giuseppe Gusev, Anatoly Hallberg, Robert W. Howard, Armando Ilicak, Mehmet Jung, Thomas Kelley, Maxwell Large, William G. Leboissetier, Anthony Long, Matthew Lu, Jianhua Masina, Simona Mishra, Akhilesh Navarra, Antonio Nurser, A.J. George Patara, Lavinia Samuels, Bonita L. Sidorenko, Dmitry Tsujino, Hiroyuki Uotila, Petteri Wang, Qiang Yeager, Steve G. 2015-09 https://eprints.soton.ac.uk/381303/ English eng Farneti, Riccardo, Downes, Stephanie M., Griffies, Stephen M., Marsland, Simon J., Behrens, Erik, Bentsen, Mats, Bi, Daohua, Biastoch, Arne, Böning, Claus, Bozec, Alexandra, Canuto, Vittorio M., Chassignet, Eric, Danabasoglu, Gokhan, Danilov, Sergey, Diansky, Nikolay, Drange, Helge, Fogli, Pier Giuseppe, Gusev, Anatoly, Hallberg, Robert W., Howard, Armando, Ilicak, Mehmet, Jung, Thomas, Kelley, Maxwell, Large, William G., Leboissetier, Anthony, Long, Matthew, Lu, Jianhua, Masina, Simona, Mishra, Akhilesh, Navarra, Antonio, Nurser, A.J. George, Patara, Lavinia, Samuels, Bonita L., Sidorenko, Dmitry, Tsujino, Hiroyuki, Uotila, Petteri, Wang, Qiang and Yeager, Steve G. (2015) An assessment of Antarctic Circumpolar Current and Southern Ocean Meridional Overturning Circulation during 1958–2007 in a suite of interannual CORE-II simulations. Ocean Modelling, 93, 84-120. (doi:10.1016/j.ocemod.2015.07.009 <http://dx.doi.org/10.1016/j.ocemod.2015.07.009>). Article PeerReviewed 2015 ftsouthampton https://doi.org/10.1016/j.ocemod.2015.07.009 2023-07-09T22:01:27Z In the framework of the second phase of the Coordinated Ocean-ice Reference Experiments (CORE-II), we present an analysis of the representation of the Antarctic Circumpolar Current (ACC) and Southern Ocean meridional overturning circulation (MOC) in a suite of seventeen global ocean–sea ice models. We focus on the mean, variability and trends of both the ACC and MOC over the 1958–2007 period, and discuss their relationship with the surface forcing. We aim to quantify the degree of eddy saturation and eddy compensation in the models participating in CORE-II, and compare our results with available observations, previous fine-resolution numerical studies and theoretical constraints. Most models show weak ACC transport sensitivity to changes in forcing during the past five decades, and they can be considered to be in an eddy saturated regime. Larger contrasts arise when considering MOC trends, with a majority of models exhibiting significant strengthening of the MOC during the late 20th and early 21st century. Only a few models show a relatively small sensitivity to forcing changes, responding with an intensified eddy-induced circulation that provides some degree of eddy compensation, while still showing considerable decadal trends. Both ACC and MOC interannual variabilities are largely controlled by the Southern Annular Mode (SAM). Based on these results, models are clustered into two groups. Models with constant or two-dimensional (horizontal) specification of the eddy-induced advection coefficient ? show larger ocean interior decadal trends, larger ACC transport decadal trends and no eddy compensation in the MOC. Eddy-permitting models or models with a three-dimensional time varying ? show smaller changes in isopycnal slopes and associated ACC trends, and partial eddy compensation. As previously argued, a constant in time or space ? is responsible for a poor representation of mesoscale eddy effects and cannot properly simulate the sensitivity of the ACC and MOC to changing surface forcing. Evidence is given for a ... Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean University of Southampton: e-Prints Soton Antarctic Southern Ocean The Antarctic Ocean Modelling 93 84 120 |