Northern Arabian Sea Circulation Autonomous Research (NASCar): A research initiative based on autonomous sensors

TitleNorthern Arabian Sea Circulation Autonomous Research (NASCar): A research initiative based on autonomous sensors
Publication TypeJournal Article
Year of Publication2017
AuthorsCenturioni LR, Hormann V., Talley LD, Arzeno I., Beal L., Caruso M., Conry P., Echols R., Fernando H.JS, Giddings S.N, Gordon A., Graber H., Harcourt R.R, Jayne SR, Jensen T.G, Lee CM, Lermusiaux P.FJ, L'Hegaret P., Lucas A.J, Mahadevan A., McClean JL, Pawlak G., Rainville L, Riser S.C, Seo H, Shcherbina A.Y, Skyllingstad E., Sprintall J, Subrahmanyam B., Terrill E, Todd R.E, Trott C., Ulloa H.N, Wang H
JournalOceanography
Volume30
Pagination74-87
Date Published2017/06
Type of ArticleArticle
ISBN Number1042-8275
Accession NumberWOS:000410333500017
Keywordsdrifter observations; glider; global ocean; impacts; indian-ocean; somali current; southwest monsoon; summer monsoon season; system; underwater; variability
Abstract

The Arabian Sea circulation is forced by strong monsoonal winds and is characterized by vigorous seasonally reversing currents, extreme differences in sea surface salinity, localized substantial upwelling, and widespread submesoscale thermohaline structures. Its complicated sea surface temperature patterns are important for the onset and evolution of the Asian monsoon. This article describes a program that aims to elucidate the role of upper-ocean processes and atmospheric feedbacks in setting the sea surface temperature properties of the region. The wide range of spatial and temporal scales and the difficulty of accessing much of the region with ships due to piracy motivated a novel approach based on state-of-the-art autonomous ocean sensors and platforms. The extensive data set that is being collected, combined with numerical models and remote sensing data, confirms the role of planetary waves in the reversal of the Somali Current system. These data also document the fast response of the upper equatorial ocean to monsoon winds through changes in temperature and salinity and the connectivity of the surface currents across the northern Indian Ocean. New observations of thermohaline interleaving structures and mixing in setting the surface temperature properties of the northern Arabian Sea are also discussed.

DOI10.5670/oceanog.2017.224
Short TitleOceanography
Student Publication: 
Yes
Student: 
sharknado