Global Patterns of Spatial and Temporal Variability in Salinity from Multiple Gridded Argo Products
Salinity is one of the fundamental ocean state variables and has been used to infer important information about climate change and variability. Previous studies have found inconsistent salinity variations in various objective ocean analyses that are based on the Argo measurements. However, as far as...
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ftunisfloridatam:oai:digitalcommons.usf.edu:msc_facpub-2428 2023-05-15T17:35:02+02:00 Global Patterns of Spatial and Temporal Variability in Salinity from Multiple Gridded Argo Products Liu, Chao Liang, Xinfeng Chambers, Don P. Ponte, Rui M. 2020-01-01T08:00:00Z https://digitalcommons.usf.edu/msc_facpub/1393 https://doi.org/10.1175/JCLI-D-20-0053.1 unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/1393 https://doi.org/10.1175/JCLI-D-20-0053.1 Marine Science Faculty Publications Life Sciences article 2020 ftunisfloridatam https://doi.org/10.1175/JCLI-D-20-0053.1 2022-01-20T18:40:02Z Salinity is one of the fundamental ocean state variables and has been used to infer important information about climate change and variability. Previous studies have found inconsistent salinity variations in various objective ocean analyses that are based on the Argo measurements. However, as far as we are aware, a comprehensive assessment of those inconsistencies, as well as robust spatial and temporal features of salinity variability among the Argo-based products, has not been conducted. Here we compare and evaluate ocean salinity variability from five objective ocean analyses that are solely or primarily based on Argo measurements for their overlapping period from 2005 to 2015. We examine the salinity variability at the sea surface and within two depth intervals (0–700 and 700–2000 m). Our results show that the climatological mean is generally consistent among all examined products, although regional discrepancies are evident in the subsurface ocean. The time evolution, vertical structure, and leading EOF modes of salinity variations show good agreement among most of the examined products, indicating that a number of robust features of the salinity variability can be obtained by examining gridded Argo products. However, significant discrepancies in these variations exist, particularly in the subsurface North Atlantic and Southern Oceans. Also, despite the increasing number of Argo floats deployed in the ocean, the discrepancies were not significantly reduced over time. Our analyses, particularly those of the discrepancies between products, can serve as a useful reference for utilizing and improving the existing objective ocean analyses that are based on Argo measurements. Article in Journal/Newspaper North Atlantic Digital Commons University of South Florida (USF) Journal of Climate 33 20 8751 8766 |
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Life Sciences |
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Life Sciences Liu, Chao Liang, Xinfeng Chambers, Don P. Ponte, Rui M. Global Patterns of Spatial and Temporal Variability in Salinity from Multiple Gridded Argo Products |
topic_facet |
Life Sciences |
description |
Salinity is one of the fundamental ocean state variables and has been used to infer important information about climate change and variability. Previous studies have found inconsistent salinity variations in various objective ocean analyses that are based on the Argo measurements. However, as far as we are aware, a comprehensive assessment of those inconsistencies, as well as robust spatial and temporal features of salinity variability among the Argo-based products, has not been conducted. Here we compare and evaluate ocean salinity variability from five objective ocean analyses that are solely or primarily based on Argo measurements for their overlapping period from 2005 to 2015. We examine the salinity variability at the sea surface and within two depth intervals (0–700 and 700–2000 m). Our results show that the climatological mean is generally consistent among all examined products, although regional discrepancies are evident in the subsurface ocean. The time evolution, vertical structure, and leading EOF modes of salinity variations show good agreement among most of the examined products, indicating that a number of robust features of the salinity variability can be obtained by examining gridded Argo products. However, significant discrepancies in these variations exist, particularly in the subsurface North Atlantic and Southern Oceans. Also, despite the increasing number of Argo floats deployed in the ocean, the discrepancies were not significantly reduced over time. Our analyses, particularly those of the discrepancies between products, can serve as a useful reference for utilizing and improving the existing objective ocean analyses that are based on Argo measurements. |
format |
Article in Journal/Newspaper |
author |
Liu, Chao Liang, Xinfeng Chambers, Don P. Ponte, Rui M. |
author_facet |
Liu, Chao Liang, Xinfeng Chambers, Don P. Ponte, Rui M. |
author_sort |
Liu, Chao |
title |
Global Patterns of Spatial and Temporal Variability in Salinity from Multiple Gridded Argo Products |
title_short |
Global Patterns of Spatial and Temporal Variability in Salinity from Multiple Gridded Argo Products |
title_full |
Global Patterns of Spatial and Temporal Variability in Salinity from Multiple Gridded Argo Products |
title_fullStr |
Global Patterns of Spatial and Temporal Variability in Salinity from Multiple Gridded Argo Products |
title_full_unstemmed |
Global Patterns of Spatial and Temporal Variability in Salinity from Multiple Gridded Argo Products |
title_sort |
global patterns of spatial and temporal variability in salinity from multiple gridded argo products |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2020 |
url |
https://digitalcommons.usf.edu/msc_facpub/1393 https://doi.org/10.1175/JCLI-D-20-0053.1 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/1393 https://doi.org/10.1175/JCLI-D-20-0053.1 |
op_doi |
https://doi.org/10.1175/JCLI-D-20-0053.1 |
container_title |
Journal of Climate |
container_volume |
33 |
container_issue |
20 |
container_start_page |
8751 |
op_container_end_page |
8766 |
_version_ |
1766134062259372032 |