Program and Agenda

Abstract

DECADAL CHANGES IN THE TROPICAL ATLANTIC ALONG THE 7.5N SECTION

The transatlantic hydrographic section along 7.5N is of great interest for climate studies as it represents a crucial region of the global overturning cell. It has been previously surveyed twice, during the 1957 International Geophysical Year and during 1993 as part of the World Ocean Circulation Experiment program under the denomination of A06 line. Comparison of these early realizations revealed moderate warming of the upper-thermocline and intermediate/upper-deep waters, and weak cooling of the bottom water. A third occupation of this section, during spring 2010, allows us to update the long-term hydrographic variations in the tropical water masses. As compared with 1993 the upper-thermocline and, to a lesser degree, the intermediate waters have continued warming and salinizing, and a clear signal of warmed and salty bottom waters has reached the western basin. Temperature and salinity changes at constant pressure are partitioned into changes on neutral surfaces and changes due to the vertical movement of the isoneutrals. Grossly speaking, advective changes dominate the intermediate layers while vertical motions are more significant in the permanent thermocline and deep/bottom waters.

ePoster:

Authors

Benítez-Barrios, V. M., Instituto Español de Oceanografía, Spain, vbenitez@oceomic.com

Pelegrí, J. L., Institut de Ciènces del Mar , Spain, pelegri@icm.csic.es

Emilianov, M., Institut de Ciènces del Mar , Spain, mikhail@icm.csic.es

Fraile-Nuez, E., Instituto Español de Oceanografía, Spain, eugenio.fraile@ca.ieo.es

Hernández-Guerra, A., Universidad de Las Palmas de Gran Canaria, Spain, alonso.hernandez@ulpgc.es

Details

Poster presentation

Session #:159
Date: 2/25/2014
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: 2647