Oceanic Circulation in the Strait of Gibraltar revealed by AIS data Information

Type Proceedings paper
Date 2021
Language English
Author(s) Le Goff C1, Mironov As1, Boussidi B1, Bordois L2, Dumas F2, Chapron Bertrand3
Affiliation(s) 1 : e-odyn, Brest, France
2 : SHOM, Brest, France
3 : Laboratory for Ocean Physics and Satellite Remote Sensing, Ifremer Brest, France
Meeting IGARSS 2021. International Geoscience and Remote Sensing Symposium In 2021 a joint initiative of Belgium and The Netherlands. 12-14 July 2021, Brussels
Source IGARSS 2021. 12-14 July 2021, Brussels. Session WE1.O-9 "Remote Sensing of Ocean Currents", Paper WE1.O-9.6. 4p.
Keyword(s) AIS, Oceanic Surface Current, Drift speed, Tides
Abstract

Our understanding of ocean circulation to date still bears many unanswered questions. Despite the development of a variety of methods for observing upper ocean current velocity at different scales, our knowledge of this subject has yet to be significantly improved. Historically, the drift of vessels led to the discovery of the oceanic surface current. The Automatic Identification System (AIS), originally intended to avoid collision in maritime traffic, contains the necessary information to retrieve vessel drift due to the surface current. Thus, the AIS data can be processed to derive sea-surface current components for any region in which there is maritime traffic. A dedicated inversion scheme has recently been theoretically formulated and implemented. In this study, we report the preliminary results obtained during an experimental campaign conducted aboard the oceanographic vessel Atalante, in the strait of Gibraltar, in October 2020. A map of oceanic circulation was calculated using the drift of all vessels emitting AIS messages within the strait and validation was achieved with the help of an Acoustic Doppler current profiler (ADCP) aboard the Atalante.

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Le Goff C, Mironov As, Boussidi B, Bordois L, Dumas F, Chapron Bertrand (2021). Oceanic Circulation in the Strait of Gibraltar revealed by AIS data Information. IGARSS 2021. 12-14 July 2021, Brussels. Session WE1.O-9 "Remote Sensing of Ocean Currents", Paper WE1.O-9.6. 4p. https://archimer.ifremer.fr/doc/00693/80508/