Spatial and temporal distribution patterns of Cladocera in the Argentine Sea |
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Authors: | María Delia Viñas Fernando C Ramírez Betina A Santos Marina Marrari |
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Institution: | (1) FRE CNRS ELICO 2816, Station Marine de Wimereux, Université des Sciences et Technologies de Lille, Lille 1, 28 avenue Foch, 62930 Wimereux, France |
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Abstract: | In the marine sciences, continuous monitoring systems have been regarded as very useful tools to provide continuous high frequency
measurements of many parameters. We analyse here a high frequency time series of temperature measurements recorded every 10
min between 1997 and 2004 in the macro tidal Seine estuary (France) by a Marel buoy, an automatic monitoring network for littoral
environment. We have adapted multi-scale data analysis methods to deal with the many missing values present in the time series.
A power spectral density analysis is performed over time scales spanning 5 decades, from 20 min to more than 7 years. A scale
invariant behaviour of the form
with β = 2.2 is revealed for scales below 5 h. Over this scaling range, we have performed structure functions analysis, and shown
that the Seine river temperature data exhibit turbulent-like intermittent properties, with multifractal statistics. The multifractal
exponents obtained possess some similarities with passive scalar turbulence results.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. |
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Keywords: | Monitoring buoy Temperature fluctuations Estuary data High-frequency sampling Scaling Missing data |
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