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Titre du document / Document title

A study of the freshwater discharge from the Amazon River into the tropical Atlantic using multi-sensor data

Auteur(s) / Author(s)

JO Young-Heon (1) ; YAN Xiao-Hai (1 2) ; DZWONKOWSKI Brian (1) ; LIU W. Timothy (3) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Center for Remote Sensing, Graduate College of Marine Studies, University of Delaware, Newark, Delaware, ETATS-UNIS
(2) Ocean Remote Sensing Institute, Ocean University of China, Qingdao, CHINE
(3) Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, ETATS-UNIS

Résumé / Abstract

We study freshwater discharge from the Amazon River into the tropical Atlantic using monthly mean multi-sensor data from September 1997 to July 2003. In order to demonstrate freshwater discharge, we used chlorophyll concentration (Chl―a) and diffuse attenuation coefficient (DAC) measured by the Sea-viewing Wide Field-of-view Sensor (SeaWiFS), and salt steric height anomaly (Δη's) derived from Integrated Multi-Sensor Data Analysis (IMSDA). IMSDA was obtained from estimating the long term-time series of Δη's by removing the thermal steric height anomaly (η'T) from altimetry data. Comparisons of long-term time series of Δη's, Chl―a, and DAC were made with mooring data at 8°N, 38°W, which were highly correlated. There are three- to five-month lags between the Amazon River discharge and 4°N latitude estimated from latitude-time diagram derived from SeaWiFS measurements.

Revue / Journal Title

Geophysical research letters    ISSN  0094-8276   CODEN GPRLAJ 

Source / Source

2005, vol. 32, no2, pp. L02605.1-L02605.4 (13 ref.)

Langue / Language

Anglais

Editeur / Publisher

American Geophysical Union, Washington, DC, ETATS-UNIS  (1974) (Revue)

Mots-clés anglais / English Keywords

sedimentary rocks

;

chemically precipitated rocks

;

evaporites

;

Atlantic Ocean

;

South America

;

latitude

;

Stream discharge

;

Mooring

;

altimetry

;

Time series

;

Long term

;

Data analysis

;

anomalies

;

Height

;

salt

;

SeaStar satellite

;

Attenuation coefficient

;

concentration

;

chlorophyll

;

river discharge

;

Equatorial Atlantic

;

Amazon River

;

Mots-clés français / French Keywords

Roche sédimentaire

;

Roche chimique

;

Evaporite

;

Océan Atlantique

;

Amérique du Sud

;

Latitude

;

Rejet cours eau

;

Amarrage

;

Altimétrie

;

Série temporelle

;

Long terme

;

Analyse donnée

;

Anomalie

;

Hauteur

;

Sel

;

Satellite SeaStar

;

Coefficient atténuation

;

Concentration

;

Chlorophylle

;

Débit rivière

;

Océan Atlantique Equatorial

;

Rivière Amazone

;

Mots-clés espagnols / Spanish Keywords

Roca sedimentaria

;

Roca química

;

Evaporito

;

Océano Atlántico

;

America del sur

;

Desagüe corriente agua

;

Amarre

;

Altimetría

;

Serie temporal

;

Largo plazo

;

Análisis datos

;

Anomalía

;

Altura

;

Sal

;

Satélite SeaStar

;

Coeficiente atenuación

;

Concentración

;

Clorofila

;

Caudal río

;

Río Amazona

;

Localisation / Location

INIST-CNRS, Cote INIST : 16687, 35400012529237.0280

Nº notice refdoc (ud4) : 16680139



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