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Common turbulent signature in sea surface temperature and chlorophyll maps

AutorNieves, Verònica ; Llebot, Clara ; Turiel, Antonio ; Solé, Jordi ; García-Ladona, Emilio ; Estrada, Marta ; Blasco, Dolors
Palabras claveTemperature and chlorophyll satellite images
Microcanonical multifractal formalism
Currents and energy transfers in the oceans
Fecha de publicación1-dic-2007
EditorAmerican Geophysical Union
CitaciónGeophysical Research Letters 34(23): L23602 (2007)
ResumenOceans and 2D turbulence present similar characteristics, as for instance the dominant role played by eddies in energy and matter transport. However, providing a complete justification of this analogy is difficult, as it requires knowledge of the ocean's dynamic state at different instants and over large scales. Recently, new techniques coming from the Microcanonical Multifractal Formalism have made it possible to infer the streamlines from the analysis of satellite images of some scalar variables. In this paper, we will show that this information is enough to characterize the scaling properties of the energy cascade, which is manifested as a multifractal signature; further, the multifractal signature is obtained at each location in a local basis. Different scalars obtained from satellite measurements such as Sea Surface Temperature or Surface Chlorophyll Concentration present essentially the same multifractal structure, which is interpreted as a consequence of the pervading character of the turbulent advection at the scales of observation.
Descripción5 pages, 3 figures.-- Full-text version available Open Access at: http://www.icm.csic.es/files/oce/almacen/papers/AR-2007-20.pdf
Versión del editorhttp://dx.doi.org/10.1029/2007GL030823
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