Skip to main content

Impact of data from upcoming altimetric missions on the prediction of the three-dimensional circulation in the tropical Atlantic Ocean

The full text article is not available for purchase.

The publisher only permits individual articles to be downloaded by subscribers.

Abstract:

The use of Sea Surface Height (SSH) satellite measurements in ocean models is a key element in the efficient control of the three-dimensional circulation through data assimilation and therefore in the quality of operational oceanography products. This paper attempts to evaluate the impact of future satellite data, particularly from the upcoming JASON2, SARAL and SWOT missions, introduced into a model through a sophisticated data assimilation procedure. For this purpose, Observing System Simulation Experiments (OSSEs) are performed in the tropical Atlantic Ocean. The NEMO model is used (at a 1/4° resolution) in a configuration covering the tropical Atlantic from 15°S to 17°N, and the assimilation scheme is a reduced-order Kalman (SEEK) filter.

The study focuses principally on controlling of the circulation of the North Brazil Current and the propagation of Tropical Instability Waves (TIW). Among the orbits tested for altimetric satellites, the JASON2 orbit (10-day repeat period) is found to give the best single satellite sampling for data assimilation. The addition of a second or third satellite to JASON2 is particularly useful in the TIW region and is even required to properly control the Brazil rings. A SWOT satellite would provide benefits that are equivalent to the contribution of two or three satellites, depending on the case.

Keywords: ALTIMETRIC MISSIONS; DATA ASSIMILATION; OCEANS MODELS; SATELLITE MEASUREMENTS; SEA SURFACE HEIGHT; SSH; THREE-DIMENTIONAL CIRCULATION; TROPICAL ATLANTIC OCEAN

Document Type: Research Article

Publication date: February 1, 2009

More about this publication?
imarest/joo/2009/00002009/00000001/art00001
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more