Variations of Global Ocean Salinity from Multiple Gridded Argo Products
Salinity is one of the fundamental ocean state variables. Variations of ocean salinity can be used to infer changes in the global water cycle and air-sea freshwater exchange. Many institutions have developed gridded Argo products of global coverage. However, the existing gridded salinity products ha...
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ftunisfloridatam:oai:digitalcommons.usf.edu:etd-9045 2023-06-11T04:14:52+02:00 Variations of Global Ocean Salinity from Multiple Gridded Argo Products Liu, Chao 2019-07-03T07:00:00Z application/pdf https://digitalcommons.usf.edu/etd/7848 https://digitalcommons.usf.edu/context/etd/article/9045/viewcontent/Liu_usf_0206M_15570.pdf unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/etd/7848 https://digitalcommons.usf.edu/context/etd/article/9045/viewcontent/Liu_usf_0206M_15570.pdf USF Tampa Graduate Theses and Dissertations ocean climate freshwater flux sea ice global water cycle Oceanography thesis 2019 ftunisfloridatam 2023-05-04T18:07:55Z Salinity is one of the fundamental ocean state variables. Variations of ocean salinity can be used to infer changes in the global water cycle and air-sea freshwater exchange. Many institutions have developed gridded Argo products of global coverage. However, the existing gridded salinity products have not yet been dedicatedly intercompare and assessed. In this study, the mean state, annual and interannual variabilities, and decadal changes of ocean salinity from five Argo-based gridded salinity products, available from UK Met Office, JAMSTEC, Scripps Institution of Oceanography, China Second Institute of Oceanography, and International Pacific Research Center, are examined and compared for their overlapping period of 2005-2015 within two depth intervals (0-700 m and 700-2000 m), as well as the sea surface. Though some global and regional features are relatively reproducible, obvious discrepancies are found particularly for the deeper layer. These discrepancies are not apparent on the 11-year climatological mean or the trend patterns, but are readily evident on temporal variations. For instance, the potentially undersampled current systems in the North Atlantic and Southern Ocean are one of the main reasons for the observed discrepancies. The gridded products from Scripps, JAMSTEC and Met Office show large deviation from the ensemble mean, particularly in regions like the Atlantic Ocean and the tropical Pacific. Large disagreements are found in the first and final years, which can lead to different estimates on decadal trends. This study can serve as a useful reference on how to utilize and improve the existing gridded salinity products. Thesis North Atlantic Sea ice Southern Ocean Digital Commons University of South Florida (USF) Southern Ocean Pacific Scripps ENVELOPE(-63.783,-63.783,-69.150,-69.150) |
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Digital Commons University of South Florida (USF) |
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ocean climate freshwater flux sea ice global water cycle Oceanography |
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ocean climate freshwater flux sea ice global water cycle Oceanography Liu, Chao Variations of Global Ocean Salinity from Multiple Gridded Argo Products |
topic_facet |
ocean climate freshwater flux sea ice global water cycle Oceanography |
description |
Salinity is one of the fundamental ocean state variables. Variations of ocean salinity can be used to infer changes in the global water cycle and air-sea freshwater exchange. Many institutions have developed gridded Argo products of global coverage. However, the existing gridded salinity products have not yet been dedicatedly intercompare and assessed. In this study, the mean state, annual and interannual variabilities, and decadal changes of ocean salinity from five Argo-based gridded salinity products, available from UK Met Office, JAMSTEC, Scripps Institution of Oceanography, China Second Institute of Oceanography, and International Pacific Research Center, are examined and compared for their overlapping period of 2005-2015 within two depth intervals (0-700 m and 700-2000 m), as well as the sea surface. Though some global and regional features are relatively reproducible, obvious discrepancies are found particularly for the deeper layer. These discrepancies are not apparent on the 11-year climatological mean or the trend patterns, but are readily evident on temporal variations. For instance, the potentially undersampled current systems in the North Atlantic and Southern Ocean are one of the main reasons for the observed discrepancies. The gridded products from Scripps, JAMSTEC and Met Office show large deviation from the ensemble mean, particularly in regions like the Atlantic Ocean and the tropical Pacific. Large disagreements are found in the first and final years, which can lead to different estimates on decadal trends. This study can serve as a useful reference on how to utilize and improve the existing gridded salinity products. |
format |
Thesis |
author |
Liu, Chao |
author_facet |
Liu, Chao |
author_sort |
Liu, Chao |
title |
Variations of Global Ocean Salinity from Multiple Gridded Argo Products |
title_short |
Variations of Global Ocean Salinity from Multiple Gridded Argo Products |
title_full |
Variations of Global Ocean Salinity from Multiple Gridded Argo Products |
title_fullStr |
Variations of Global Ocean Salinity from Multiple Gridded Argo Products |
title_full_unstemmed |
Variations of Global Ocean Salinity from Multiple Gridded Argo Products |
title_sort |
variations of global ocean salinity from multiple gridded argo products |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2019 |
url |
https://digitalcommons.usf.edu/etd/7848 https://digitalcommons.usf.edu/context/etd/article/9045/viewcontent/Liu_usf_0206M_15570.pdf |
long_lat |
ENVELOPE(-63.783,-63.783,-69.150,-69.150) |
geographic |
Southern Ocean Pacific Scripps |
geographic_facet |
Southern Ocean Pacific Scripps |
genre |
North Atlantic Sea ice Southern Ocean |
genre_facet |
North Atlantic Sea ice Southern Ocean |
op_source |
USF Tampa Graduate Theses and Dissertations |
op_relation |
https://digitalcommons.usf.edu/etd/7848 https://digitalcommons.usf.edu/context/etd/article/9045/viewcontent/Liu_usf_0206M_15570.pdf |
_version_ |
1768371206555172864 |