THE ROLE OF THE SOUTHERN OCEAN ON GLOBAL OCEAN CIRCULATION AND CLIMATE
The Southern Ocean (SO) is a unique and highly dynamic region with strong temperature and salinity gradients. A comparison between satellite-derived salinity and observations indicates strong differences along coastal boundaries, areas of low temperature, and regions of strong currents. Although dif...
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ftccsdartic:oai:HAL:tel-03923702v1 2023-05-15T13:47:32+02:00 THE ROLE OF THE SOUTHERN OCEAN ON GLOBAL OCEAN CIRCULATION AND CLIMATE LE RÔLE DE L'OCÉAN AUSTRAL SUR LA CIRCULATION OCÉANIQUE ET LE CLIMAT MONDIAL Ferster, Brady University of South Carolina Columbia University of South Carolina Subrahmanyam Bulusu 2019-04-29 https://hal.science/tel-03923702 https://hal.science/tel-03923702/document https://hal.science/tel-03923702/file/Ferster_PhD_Dissertation_HAL.pdf en eng HAL CCSD tel-03923702 https://hal.science/tel-03923702 https://hal.science/tel-03923702/document https://hal.science/tel-03923702/file/Ferster_PhD_Dissertation_HAL.pdf info:eu-repo/semantics/OpenAccess https://hal.science/tel-03923702 Global Changes. University of South Carolina, 2019. English. ⟨NNT : ⟩ Southern Ocean Ocean Transports Remote Sensing [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/doctoralThesis Theses 2019 ftccsdartic 2023-02-12T10:54:23Z The Southern Ocean (SO) is a unique and highly dynamic region with strong temperature and salinity gradients. A comparison between satellite-derived salinity and observations indicates strong differences along coastal boundaries, areas of low temperature, and regions of strong currents. Although differences throughout much of the SO are shown to be negligible, resolution and smoothing in the products create large biases in horizontal gradients and errors in estimating the water cycle. The three-dimensional movement of water within the SO plays an important role in the global Meridional Overturning Circulation (MOC), where the Southern Hemisphere westerlies drive both zonal and meridional transports and strong vertical movements of local water masses. Using the Estimating the Circulation and Climate of the Ocean (ECCO) estimates of ocean circulation, recent trends in the lower cell of the MOC (1992-2015) show increased overturning within the South Atlantic and decreased overturning within the Indian and Pacific basins, increasing the net SO heat transports and storage.The path of the Antarctic Circumpolar Current (ACC) is mainly dictated by bathymetry, but recent variability indicates a northward shift in the central South Pacific ACC fronts. The movement and location of the ACC is highly correlated to salinity and temperature shifts up to 100 m depth and moderately correlated to depths of 1000 m. The location of the ACC is weakly-to-moderately correlated with the Antarctic and Southern Oscillations. These large-scale teleconnections are further driving surface cooling in the central South Pacific and warming in the subtropics and mid-latitudes of the Southern Hemisphere. Satellite-derived sea surface temperatures (SSTs) are highly correlated with both the Antarctic and Southern Oscillations during 1982-2016, particularly during the austral summer months when the oscillations tend to be the strongest. Changes in the westerlies are correlated with sea level and heat content anomalies and anti-correlated to SST in ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Austral Indian Pacific Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Southern Ocean Ocean Transports Remote Sensing [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Southern Ocean Ocean Transports Remote Sensing [SDE.MCG]Environmental Sciences/Global Changes Ferster, Brady THE ROLE OF THE SOUTHERN OCEAN ON GLOBAL OCEAN CIRCULATION AND CLIMATE |
topic_facet |
Southern Ocean Ocean Transports Remote Sensing [SDE.MCG]Environmental Sciences/Global Changes |
description |
The Southern Ocean (SO) is a unique and highly dynamic region with strong temperature and salinity gradients. A comparison between satellite-derived salinity and observations indicates strong differences along coastal boundaries, areas of low temperature, and regions of strong currents. Although differences throughout much of the SO are shown to be negligible, resolution and smoothing in the products create large biases in horizontal gradients and errors in estimating the water cycle. The three-dimensional movement of water within the SO plays an important role in the global Meridional Overturning Circulation (MOC), where the Southern Hemisphere westerlies drive both zonal and meridional transports and strong vertical movements of local water masses. Using the Estimating the Circulation and Climate of the Ocean (ECCO) estimates of ocean circulation, recent trends in the lower cell of the MOC (1992-2015) show increased overturning within the South Atlantic and decreased overturning within the Indian and Pacific basins, increasing the net SO heat transports and storage.The path of the Antarctic Circumpolar Current (ACC) is mainly dictated by bathymetry, but recent variability indicates a northward shift in the central South Pacific ACC fronts. The movement and location of the ACC is highly correlated to salinity and temperature shifts up to 100 m depth and moderately correlated to depths of 1000 m. The location of the ACC is weakly-to-moderately correlated with the Antarctic and Southern Oscillations. These large-scale teleconnections are further driving surface cooling in the central South Pacific and warming in the subtropics and mid-latitudes of the Southern Hemisphere. Satellite-derived sea surface temperatures (SSTs) are highly correlated with both the Antarctic and Southern Oscillations during 1982-2016, particularly during the austral summer months when the oscillations tend to be the strongest. Changes in the westerlies are correlated with sea level and heat content anomalies and anti-correlated to SST in ... |
author2 |
University of South Carolina Columbia University of South Carolina Subrahmanyam Bulusu |
format |
Doctoral or Postdoctoral Thesis |
author |
Ferster, Brady |
author_facet |
Ferster, Brady |
author_sort |
Ferster, Brady |
title |
THE ROLE OF THE SOUTHERN OCEAN ON GLOBAL OCEAN CIRCULATION AND CLIMATE |
title_short |
THE ROLE OF THE SOUTHERN OCEAN ON GLOBAL OCEAN CIRCULATION AND CLIMATE |
title_full |
THE ROLE OF THE SOUTHERN OCEAN ON GLOBAL OCEAN CIRCULATION AND CLIMATE |
title_fullStr |
THE ROLE OF THE SOUTHERN OCEAN ON GLOBAL OCEAN CIRCULATION AND CLIMATE |
title_full_unstemmed |
THE ROLE OF THE SOUTHERN OCEAN ON GLOBAL OCEAN CIRCULATION AND CLIMATE |
title_sort |
role of the southern ocean on global ocean circulation and climate |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/tel-03923702 https://hal.science/tel-03923702/document https://hal.science/tel-03923702/file/Ferster_PhD_Dissertation_HAL.pdf |
geographic |
Antarctic Austral Indian Pacific Southern Ocean The Antarctic |
geographic_facet |
Antarctic Austral Indian Pacific Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
https://hal.science/tel-03923702 Global Changes. University of South Carolina, 2019. English. ⟨NNT : ⟩ |
op_relation |
tel-03923702 https://hal.science/tel-03923702 https://hal.science/tel-03923702/document https://hal.science/tel-03923702/file/Ferster_PhD_Dissertation_HAL.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766247281557766144 |