Estimation of geostrophic current in the Red Sea based on sea level anomalies derived from extended satellite altimetry data
<p>Geostrophic current data near the coast of the Red Sea have large gaps. Hence, the sea level anomaly (SLA) data from Jason-2 have been reprocessed and extended towards the coast of the Red Sea and merged with AVISO data at the offshore region. This processing has been applied to build a gri...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2019-05-01
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| Series: | Ocean Science |
| Online Access: | https://www.ocean-sci.net/15/477/2019/os-15-477-2019.pdf |
| _version_ | 1818447373903331328 |
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| author | A. M. Taqi A. M. Taqi A. M. Al-Subhi M. A. Alsaafani C. P. Abdulla |
| author_facet | A. M. Taqi A. M. Taqi A. M. Al-Subhi M. A. Alsaafani C. P. Abdulla |
| author_sort | A. M. Taqi |
| collection | DOAJ |
| description | <p>Geostrophic current data near the coast of the Red Sea have large gaps.
Hence, the sea level anomaly (SLA) data from Jason-2 have been reprocessed and
extended towards the coast of the Red Sea and merged with AVISO data at the
offshore region. This processing has been applied to build a gridded dataset
to achieve the best results for the SLA and geostrophic current. The results
obtained from the new extended data at the coast are more consistent with the
observed data (conductivity–temperature–depth, CTD) and hence geostrophic current calculation. The patterns
of SLA distribution and geostrophic currents are divided into two seasons:
winter (October–May) and summer (June–September). The geostrophic currents
in summer are flowing southward over the Red Sea except for narrow
northward flow along the east coast. In winter, currents flow to the north
for the entire Red Sea except for a small southward flow near the central
eastern and western coast. This flow is modified by the presence of cyclonic
and anticyclonic eddies, which are more concentrated in the central and
northern Red Sea. The results show anticyclonic eddies (AEs) on the eastern
side of the Red Sea and cyclonic eddies (CEs) on the western side during
winter. In summer, cyclonic eddies are more dominant for the entire Red Sea.
The result shows a change in some eddies from anticyclonic during winter to
cyclonic during summer in the north between 26.3 and 27.5<span class="inline-formula"><sup>∘</sup></span> N.
Furthermore, the life span of cyclonic eddies is longer than that of
anticyclonic eddies.</p> |
| first_indexed | 2024-12-14T20:02:36Z |
| format | Article |
| id | doaj.art-3f2993a2e9a84f98a11f473db7bd7340 |
| institution | Directory Open Access Journal |
| issn | 1812-0784 1812-0792 |
| language | English |
| last_indexed | 2024-12-14T20:02:36Z |
| publishDate | 2019-05-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Ocean Science |
| spelling | doaj.art-3f2993a2e9a84f98a11f473db7bd73402022-12-21T22:49:07ZengCopernicus PublicationsOcean Science1812-07841812-07922019-05-011547748810.5194/os-15-477-2019Estimation of geostrophic current in the Red Sea based on sea level anomalies derived from extended satellite altimetry dataA. M. Taqi0A. M. Taqi1A. M. Al-Subhi2M. A. Alsaafani3C. P. Abdulla4Department of Marine Physics, King Abdulaziz University, Jeddah, Saudi ArabiaDepartment of Marine Physics, Hodeihah University, Hodeihah, YemenDepartment of Marine Physics, King Abdulaziz University, Jeddah, Saudi ArabiaDepartment of Marine Physics, King Abdulaziz University, Jeddah, Saudi ArabiaDepartment of Marine Physics, King Abdulaziz University, Jeddah, Saudi Arabia<p>Geostrophic current data near the coast of the Red Sea have large gaps. Hence, the sea level anomaly (SLA) data from Jason-2 have been reprocessed and extended towards the coast of the Red Sea and merged with AVISO data at the offshore region. This processing has been applied to build a gridded dataset to achieve the best results for the SLA and geostrophic current. The results obtained from the new extended data at the coast are more consistent with the observed data (conductivity–temperature–depth, CTD) and hence geostrophic current calculation. The patterns of SLA distribution and geostrophic currents are divided into two seasons: winter (October–May) and summer (June–September). The geostrophic currents in summer are flowing southward over the Red Sea except for narrow northward flow along the east coast. In winter, currents flow to the north for the entire Red Sea except for a small southward flow near the central eastern and western coast. This flow is modified by the presence of cyclonic and anticyclonic eddies, which are more concentrated in the central and northern Red Sea. The results show anticyclonic eddies (AEs) on the eastern side of the Red Sea and cyclonic eddies (CEs) on the western side during winter. In summer, cyclonic eddies are more dominant for the entire Red Sea. The result shows a change in some eddies from anticyclonic during winter to cyclonic during summer in the north between 26.3 and 27.5<span class="inline-formula"><sup>∘</sup></span> N. Furthermore, the life span of cyclonic eddies is longer than that of anticyclonic eddies.</p>https://www.ocean-sci.net/15/477/2019/os-15-477-2019.pdf |
| spellingShingle | A. M. Taqi A. M. Taqi A. M. Al-Subhi M. A. Alsaafani C. P. Abdulla Estimation of geostrophic current in the Red Sea based on sea level anomalies derived from extended satellite altimetry data Ocean Science |
| title | Estimation of geostrophic current in the Red Sea based on sea level anomalies derived from extended satellite altimetry data |
| title_full | Estimation of geostrophic current in the Red Sea based on sea level anomalies derived from extended satellite altimetry data |
| title_fullStr | Estimation of geostrophic current in the Red Sea based on sea level anomalies derived from extended satellite altimetry data |
| title_full_unstemmed | Estimation of geostrophic current in the Red Sea based on sea level anomalies derived from extended satellite altimetry data |
| title_short | Estimation of geostrophic current in the Red Sea based on sea level anomalies derived from extended satellite altimetry data |
| title_sort | estimation of geostrophic current in the red sea based on sea level anomalies derived from extended satellite altimetry data |
| url | https://www.ocean-sci.net/15/477/2019/os-15-477-2019.pdf |
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