Abstract
The Arabian Sea is characterized by an annually reversing circulation influenced by strong monsoon winds. The southwest monsoon that occurs during summer drives a northward boundary current along the coast of Somalia. During the winter monsoon, the southward flowing Somali Current merges with the northward flowing East African Coastal Current to form the eastward flowing South Equatorial Counter Current. This pattern shifts during the summer monsoon as the East African Coastal Current feeds the reversing Somali Current. Part of this northward flow retroflects from the coast at about 4◦N to form the Southern Gyre while the remaining flow continues north past the Gulf of Aden or detaches at about 10◦N to form the Great Whirl. Sentinel-1 synthetic aperture radar (SAR) data were acquired over the Somali Current in 2016 during the summer and winter monsoons. The Somali Current along the coast, the Southern Gyre and the Great Whirl are well developed at the time of the summer acquisition. The covariability of the atmospheric boundary layer and sea surface temperature was observed at high resolution over the Western Arabian Sea. Wind stress curl derived from the SAR data show the effects of the cold upwelled water and the Somali Current on the wind speed. Significant organized large eddies (OLEs) are also observed east of the Somali Current. During the winter monsoon, the Somali Current, Southern Gyre and Great Whirl are absent. The wind stress curl computed from the SAR data confirm this and do not show distinct circulation patterns or OLEs.
| Original language | English (US) |
|---|---|
| Title of host publication | 2017 Progress In Electromagnetics Research Symposium - Fall, PIERS - FALL 2017 - Proceedings |
| Publisher | Electromagnetics Academy |
| Pages | 1720-1725 |
| Number of pages | 6 |
| Volume | 2017-November |
| ISBN (Electronic) | 9781538612118 |
| DOIs | |
| State | Published - Nov 20 2017 |
| Event | 2017 Progress In Electromagnetics Research Symposium - Fall, PIERS - FALL 2017 - Singapore, Singapore Duration: Nov 19 2017 → Nov 22 2017 |
Other
| Other | 2017 Progress In Electromagnetics Research Symposium - Fall, PIERS - FALL 2017 |
|---|---|
| Country | Singapore |
| City | Singapore |
| Period | 11/19/17 → 11/22/17 |
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ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
Cite this
SAR observations of organized large eddies over the Somali current. / Caruso, Michael J.; Foster, Ralph C.; Graber, Hans C.
2017 Progress In Electromagnetics Research Symposium - Fall, PIERS - FALL 2017 - Proceedings. Vol. 2017-November Electromagnetics Academy, 2017. p. 1720-1725.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - SAR observations of organized large eddies over the Somali current
AU - Caruso, Michael J.
AU - Foster, Ralph C.
AU - Graber, Hans C
PY - 2017/11/20
Y1 - 2017/11/20
N2 - The Arabian Sea is characterized by an annually reversing circulation influenced by strong monsoon winds. The southwest monsoon that occurs during summer drives a northward boundary current along the coast of Somalia. During the winter monsoon, the southward flowing Somali Current merges with the northward flowing East African Coastal Current to form the eastward flowing South Equatorial Counter Current. This pattern shifts during the summer monsoon as the East African Coastal Current feeds the reversing Somali Current. Part of this northward flow retroflects from the coast at about 4◦N to form the Southern Gyre while the remaining flow continues north past the Gulf of Aden or detaches at about 10◦N to form the Great Whirl. Sentinel-1 synthetic aperture radar (SAR) data were acquired over the Somali Current in 2016 during the summer and winter monsoons. The Somali Current along the coast, the Southern Gyre and the Great Whirl are well developed at the time of the summer acquisition. The covariability of the atmospheric boundary layer and sea surface temperature was observed at high resolution over the Western Arabian Sea. Wind stress curl derived from the SAR data show the effects of the cold upwelled water and the Somali Current on the wind speed. Significant organized large eddies (OLEs) are also observed east of the Somali Current. During the winter monsoon, the Somali Current, Southern Gyre and Great Whirl are absent. The wind stress curl computed from the SAR data confirm this and do not show distinct circulation patterns or OLEs.
AB - The Arabian Sea is characterized by an annually reversing circulation influenced by strong monsoon winds. The southwest monsoon that occurs during summer drives a northward boundary current along the coast of Somalia. During the winter monsoon, the southward flowing Somali Current merges with the northward flowing East African Coastal Current to form the eastward flowing South Equatorial Counter Current. This pattern shifts during the summer monsoon as the East African Coastal Current feeds the reversing Somali Current. Part of this northward flow retroflects from the coast at about 4◦N to form the Southern Gyre while the remaining flow continues north past the Gulf of Aden or detaches at about 10◦N to form the Great Whirl. Sentinel-1 synthetic aperture radar (SAR) data were acquired over the Somali Current in 2016 during the summer and winter monsoons. The Somali Current along the coast, the Southern Gyre and the Great Whirl are well developed at the time of the summer acquisition. The covariability of the atmospheric boundary layer and sea surface temperature was observed at high resolution over the Western Arabian Sea. Wind stress curl derived from the SAR data show the effects of the cold upwelled water and the Somali Current on the wind speed. Significant organized large eddies (OLEs) are also observed east of the Somali Current. During the winter monsoon, the Somali Current, Southern Gyre and Great Whirl are absent. The wind stress curl computed from the SAR data confirm this and do not show distinct circulation patterns or OLEs.
UR - http://www.scopus.com/inward/record.url?scp=85045317242&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85045317242&partnerID=8YFLogxK
U2 - 10.1109/PIERS-FALL.2017.8293413
DO - 10.1109/PIERS-FALL.2017.8293413
M3 - Conference contribution
AN - SCOPUS:85045317242
VL - 2017-November
SP - 1720
EP - 1725
BT - 2017 Progress In Electromagnetics Research Symposium - Fall, PIERS - FALL 2017 - Proceedings
PB - Electromagnetics Academy
ER -