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Ocean salinity from satellite-derived temperature in the Antarctic Ocean

Published online by Cambridge University Press:  01 December 2015

M.A. Benallal ,
H. Moussa ,
F. Touratier ,
C. Goyet  and
A. Poisson
M.A. Benallal*
Affiliation:
IMAGES ESPACE-DEV, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860 Perpignan Cedex 9, France ESPACE-DEV, UG UA UR UM IRD, Maison de la télédétection, 500 Rue Jean-François Breton, 34093 Montpellier Cedex 5, France
H. Moussa
Affiliation:
IMAGES ESPACE-DEV, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860 Perpignan Cedex 9, France ESPACE-DEV, UG UA UR UM IRD, Maison de la télédétection, 500 Rue Jean-François Breton, 34093 Montpellier Cedex 5, France
F. Touratier
Affiliation:
IMAGES ESPACE-DEV, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860 Perpignan Cedex 9, France ESPACE-DEV, UG UA UR UM IRD, Maison de la télédétection, 500 Rue Jean-François Breton, 34093 Montpellier Cedex 5, France
C. Goyet
Affiliation:
IMAGES ESPACE-DEV, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860 Perpignan Cedex 9, France ESPACE-DEV, UG UA UR UM IRD, Maison de la télédétection, 500 Rue Jean-François Breton, 34093 Montpellier Cedex 5, France
A. Poisson
Affiliation:
IMAGES ESPACE-DEV, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860 Perpignan Cedex 9, France Laboratoire d’Océanographie et du Climat: Expérimentation et Approches Numériques (LOCEAN/IPSL), Université Pierre et Marie Curie, Paris, France
*
[email protected]
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Abstract

The aim of the MINERVE project (Mesures à l’INterface Eau-aiR de la Variabilité des Échanges de CO2) is to observe and understand the seasonal and interannual variability of the partial pressure of CO2 (pCO2) in surface waters using hydrological and biogeochemical data in the Southern Ocean south of Australia. Logistics routes of the RV Astrolabe provide access to scarcely studied areas, thus allowing us to understand the different processes acting in this area of the Antarctic Ocean. The surface area covered by these cruises, however, is tiny compared with the total surface area of the Antarctic Ocean. Correlations between in situ surface temperature and salinity data were applied to satellite images of sea surface temperature to map ocean surface salinity over a much wider area than under the cruise tracks. Comparisons with salinity data from satellites which provide ~100 km resolution and 0.1 accuracy indicate that we are able to map salinity at 4 km resolution and almost the same accuracy of ± 0.1.

Keywords

mappingSouthern Oceansurface salinitytemperature fields
Type
Physical Sciences
Information
Antarctic Science , Volume 28 , Issue 2 , April 2016 , pp. 127 - 134
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Copyright
© Antarctic Science Ltd 2015 

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