Contrasting Discrepancy in the Sea Level Budget Between the North and South Atlantic Ocean Since 2016
Abstract The discrepancy in the observed global mean sea level budget increased significantly since 2016, but the budget discrepancy over basin‐scales is unclear. In this contribution, we investigate the sea level budget discrepancies in major basins with observations from satellite altimetry, satel...
Published in: | Earth and Space Science |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union (AGU)
2024
|
Subjects: | |
Online Access: | https://doi.org/10.1029/2023EA003133 https://doaj.org/article/16f04a6258ca4029bad987ca37e5a3a8 |
id |
ftdoajarticles:oai:doaj.org/article:16f04a6258ca4029bad987ca37e5a3a8 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:16f04a6258ca4029bad987ca37e5a3a8 2024-09-15T18:21:04+00:00 Contrasting Discrepancy in the Sea Level Budget Between the North and South Atlantic Ocean Since 2016 Dapeng Mu John A. Church Matt King Carsten Bjerre Ludwigsen Tianhe Xu 2024-08-01T00:00:00Z https://doi.org/10.1029/2023EA003133 https://doaj.org/article/16f04a6258ca4029bad987ca37e5a3a8 EN eng American Geophysical Union (AGU) https://doi.org/10.1029/2023EA003133 https://doaj.org/toc/2333-5084 2333-5084 doi:10.1029/2023EA003133 https://doaj.org/article/16f04a6258ca4029bad987ca37e5a3a8 Earth and Space Science, Vol 11, Iss 8, Pp n/a-n/a (2024) sea level budget GRACE Astronomy QB1-991 Geology QE1-996.5 article 2024 ftdoajarticles https://doi.org/10.1029/2023EA003133 2024-09-02T15:34:39Z Abstract The discrepancy in the observed global mean sea level budget increased significantly since 2016, but the budget discrepancy over basin‐scales is unclear. In this contribution, we investigate the sea level budget discrepancies in major basins with observations from satellite altimetry, satellite gravimetry, and Argo floats. During 2016–2020, we find substantial discrepancy of 5.72 ± 0.98 mm/yr over the North Atlantic Ocean, and the basin scale discrepancies are smaller elsewhere. Our analysis suggests that three factors, including the wet tropospheric correction (WTC) effect, deep ocean warming signal, and the contemporary ocean bottom deformation (OBD), together reduce the discrepancy by only 1 mm/yr for the North Atlantic Ocean. We decompose sea level observations into the spherical harmonic domain and observe increased discrepancy in low‐degree variations of C10 and C21 since 2016. These two coefficients result in a contrasting signal between the North and South Atlantic Ocean and contribute to the large discrepancy over the North Atlantic Ocean. We further demonstrate that the C10 and C21 discrepancies are independent of the three factors. However, we find regional salinity biases in the Argo data that reduce the discrepancy for the North Atlantic Ocean. Our findings add to the debate about recent sea level budget and imply that further analysis of the Argo North Atlantic data set may be useful. Article in Journal/Newspaper North Atlantic South Atlantic Ocean Directory of Open Access Journals: DOAJ Articles Earth and Space Science 11 8 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
sea level budget GRACE Astronomy QB1-991 Geology QE1-996.5 |
spellingShingle |
sea level budget GRACE Astronomy QB1-991 Geology QE1-996.5 Dapeng Mu John A. Church Matt King Carsten Bjerre Ludwigsen Tianhe Xu Contrasting Discrepancy in the Sea Level Budget Between the North and South Atlantic Ocean Since 2016 |
topic_facet |
sea level budget GRACE Astronomy QB1-991 Geology QE1-996.5 |
description |
Abstract The discrepancy in the observed global mean sea level budget increased significantly since 2016, but the budget discrepancy over basin‐scales is unclear. In this contribution, we investigate the sea level budget discrepancies in major basins with observations from satellite altimetry, satellite gravimetry, and Argo floats. During 2016–2020, we find substantial discrepancy of 5.72 ± 0.98 mm/yr over the North Atlantic Ocean, and the basin scale discrepancies are smaller elsewhere. Our analysis suggests that three factors, including the wet tropospheric correction (WTC) effect, deep ocean warming signal, and the contemporary ocean bottom deformation (OBD), together reduce the discrepancy by only 1 mm/yr for the North Atlantic Ocean. We decompose sea level observations into the spherical harmonic domain and observe increased discrepancy in low‐degree variations of C10 and C21 since 2016. These two coefficients result in a contrasting signal between the North and South Atlantic Ocean and contribute to the large discrepancy over the North Atlantic Ocean. We further demonstrate that the C10 and C21 discrepancies are independent of the three factors. However, we find regional salinity biases in the Argo data that reduce the discrepancy for the North Atlantic Ocean. Our findings add to the debate about recent sea level budget and imply that further analysis of the Argo North Atlantic data set may be useful. |
format |
Article in Journal/Newspaper |
author |
Dapeng Mu John A. Church Matt King Carsten Bjerre Ludwigsen Tianhe Xu |
author_facet |
Dapeng Mu John A. Church Matt King Carsten Bjerre Ludwigsen Tianhe Xu |
author_sort |
Dapeng Mu |
title |
Contrasting Discrepancy in the Sea Level Budget Between the North and South Atlantic Ocean Since 2016 |
title_short |
Contrasting Discrepancy in the Sea Level Budget Between the North and South Atlantic Ocean Since 2016 |
title_full |
Contrasting Discrepancy in the Sea Level Budget Between the North and South Atlantic Ocean Since 2016 |
title_fullStr |
Contrasting Discrepancy in the Sea Level Budget Between the North and South Atlantic Ocean Since 2016 |
title_full_unstemmed |
Contrasting Discrepancy in the Sea Level Budget Between the North and South Atlantic Ocean Since 2016 |
title_sort |
contrasting discrepancy in the sea level budget between the north and south atlantic ocean since 2016 |
publisher |
American Geophysical Union (AGU) |
publishDate |
2024 |
url |
https://doi.org/10.1029/2023EA003133 https://doaj.org/article/16f04a6258ca4029bad987ca37e5a3a8 |
genre |
North Atlantic South Atlantic Ocean |
genre_facet |
North Atlantic South Atlantic Ocean |
op_source |
Earth and Space Science, Vol 11, Iss 8, Pp n/a-n/a (2024) |
op_relation |
https://doi.org/10.1029/2023EA003133 https://doaj.org/toc/2333-5084 2333-5084 doi:10.1029/2023EA003133 https://doaj.org/article/16f04a6258ca4029bad987ca37e5a3a8 |
op_doi |
https://doi.org/10.1029/2023EA003133 |
container_title |
Earth and Space Science |
container_volume |
11 |
container_issue |
8 |
_version_ |
1810459466656645120 |