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Nat. Hazards Earth Syst. Sci., 16, 2043-2054, 2016
https://doi.org/10.5194/nhess-16-2043-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
02 Sep 2016
Observed and simulated trophic index (TRIX) values for the Adriatic Sea basin
Emanuela Fiori1,2,3, Marco Zavatarelli1,2, Nadia Pinardi1,4, Cristina Mazziotti3, and Carla Rita Ferrari3 1Dipartimento di Fisica e Astronomia (DIFA) University of Bologna, Viale Berti Pichat, 6/2, 40127 Bologna, Italy
2Consorzio Nazionale Interuniversitario per le Scienze dal Mare, Piazzale Flaminio 9, 00195 Rome, Italy
3Agenzia Regionale Prevenzione Ambiente Energia (ARPAE) dell'Emilia-Romagna, Struttura Oceanografica Daphne, Viale Vespucci, 2, 47042 Cesenatico (FC), Italy
4Centro EuroMediterraneo sui Cambiamenti Climatici, Lecce, Italy
Abstract. The main scope of the Marine Strategy Framework Directive is to achieve good environmental status (GES) of the EU's marine waters by 2020, in order to protect the marine environment more effectively. The trophic index (TRIX) was developed by Vollenweider in 1998 for the coastal area of Emilia-Romagna (northern Adriatic Sea) and was used by the Italian legislation to characterize the trophic state of coastal waters.

We compared the TRIX index calculated from in situ data (“in situ TRIX”) with the corresponding index simulated with a coupled physics and biogeochemical numerical model (“model TRIX”) implemented in the overall Adriatic Sea. The comparison between in situ and simulated data was carried out for a data time series on the Emilia-Romagna coastal strip. This study shows the compatibility of the model with the in situ TRIX and the importance of the length of the time series in order to get robust index estimates. The model TRIX is finally calculated for the whole Adriatic Sea, showing trophic index differences across the Adriatic coastal areas.


Citation: Fiori, E., Zavatarelli, M., Pinardi, N., Mazziotti, C., and Ferrari, C. R.: Observed and simulated trophic index (TRIX) values for the Adriatic Sea basin, Nat. Hazards Earth Syst. Sci., 16, 2043-2054, https://doi.org/10.5194/nhess-16-2043-2016, 2016.
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Short summary
This study shows the capability of the numerical model in reproducing the trophic index (TRIX) calculated from in situ data. The ecosystem simulations can represent an important support for monitoring activities, allowing the use of TRIX to be extended to larger areas where in situ sampling activities are difficult to implement. The model TRIX was calculated for the whole Adriatic Sea, showing trophic differences across the Adriatic Sea.
This study shows the capability of the numerical model in reproducing the trophic index (TRIX)...
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