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Synergetic combination of ASAR with spectrometers and radiometers for advanced interpretation of mesoscale current features.

Johnny Johannessen(1), Fabrice Collard(2), Bertrand Chapron(3), Bjorn Backeberg(4) and Vladimir Kudryavtsev(5)

(1) NERSC, Thormoehlensgate 47, N-5006 Bergen, Norway
(2) BOOST-Technologies, 115, rue Claude Chappe, 29280 Plouzane, France
(3) IFREMER, Z.I. Pointe du Diable, B.P. 70 Plouzane, France
(4) Dep. of Oceanography,, Private Bag X3, Rondebosch 7701, Cape Ton, South Africa
(5) NIERSC, Vasilievsky Island, St. Petersburg, Russian Federation

Abstract

The synergetic use of satellite derived ocean color, sea surface temperature and surface roughness data from spectrometer, radiometer and radar sensors is a technique that has attracted increasing scientific interest in the recent years. With the regular access to near real time spectrometer, radiometer and radar data, and gradually more advanced SAR imaging interpretation capabilities, it is timely to undertake systematic exploration of the inherent benefit in such a synergetic approach. In this paper we will demonstrate this for detection and monitoring of mesoscale ocean features. The energetic current regimes associated with the Gulf Stream and greater Agulhas Current are considered as natural laboratories in this context. The advantages of synergy between data from different satellite sensors are that shortcomings of one data type can be compensated for by the strengths of others. This applies to (i) sampling parameters like spatial resolution, spatial coverage and temporal coverage, (ii) sensitivity to atmospheric processes and cloud cover, and (iii) sensitivity to physical and biochemical parameters of the upper ocean. In particular, we shall emphasize the capability of the synergetic approach to advance the quantitative interpretations, limit the impact of cloud cover, and stimulate more regular application of SAR data.

 

Workshop presentation

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry