Record Details
Intrathermocline eddies in the coastal transition zone off central Chile (31–41°S)
ScholarsArchive at Oregon State University
| Field | Value |
|---|---|
| Title | Intrathermocline eddies in the coastal transition zone off central Chile (31–41°S) |
| Names |
Hormazabal, Samuel
(creator) Combes, Vincent (creator) Morales, Carmen E. (creator) Correa-Ramirez, Marco A. (creator) Di Lorenzo, Emmanuel (creator) Nuñez, Sergio (creator) |
| Date Issued | 2013-10-02 (iso8601) |
| Note | This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2169-9291. |
| Abstract | The three-dimensional structure and the origin of mesoscale anticyclonic intrathermocline eddies (ITEs) in the coastal transition zone (CTZ) off central Chile (31–41°S) were analyzed through the combination of data from oceanographic cruises and satellite altimetry, and the application of an eddy-resolving primitive equation ocean model coupled with a numerical experiment using a passive tracer. In this region, ITEs are represented by subsurface lenses (~100 km diameter; 500 m thickness or vertical extension) of nearly homogeneous salinity (>34.5) and oxygen-deficient (<1.0 mL L⁻¹) waters, properties which are linked to the equatorial subsurface water mass (ESSW) transported poleward by the Peru-Chile undercurrent (PCUC) in the coastal band. At least five to seven ITEs were observed simultaneously in the area between 31° and 38°S during winter cruises in 1997 and 2009. Satellite data indicated that the ITEs identified from in situ data moved westward, each at a mean speed of ~2 km d⁻¹ and transported a total volume of ~1 x 10⁶ m³ s⁻¹ (=1 Sv); the lifespan of each ITE ranged from a few months to 1 year. Model results indicate that ITEs become detached from the PCUC under summer upwelling conditions in the coastal zone. |
| Genre | Article |
| Topic | Intrathermocline eddies |
| Identifier | Hormazabal, S., V. Combes, C. E. Morales, M. A. Correa-Ramirez, E. Di Lorenzo, and S. Nuñez (2013), Intrathermocline eddies in the coastal transition zone off central Chile (31–41°S), Journal of Geophysical Research: Oceans, 118, 4811–4821. doi:10.1002/jgrc.20337 |
