Pre-operational short-term forecasts for Mediterranean Sea biogeochemistry

Abstract. Operational prediction of the marine environment is recognised as a fundamental research issue in Europe. We present a pre-operational implementation of a biogeochemical model for the pelagic waters of the Mediterranean Sea, developed within the framework of the MERSEA-IP European project. The OPATM-BFM coupled model is the core of a fully automatic system that delivers weekly analyses and forecast maps for the Mediterranean Sea biogeochemistry. The system has been working in its current configuration since April 2007 with successful execution of the fully automatic operational chain in 87% of the cases while in the remaining cases the runs were successfully accomplished after operator intervention. A description of the system developed and also a comparison of the model results with satellite data are presented, together with a measure of the model skill evaluated by means of seasonal target diagrams. Future studies will address the implementation of a data assimilation scheme for the biogeochemical compartment in order to increase the skill of the model's performance.

[1]  C. Fratianni,et al.  under a Creative Commons License. Ocean Science Daily oceanographic analyses by Mediterranean Forecasting System , 2007 .

[2]  F. Conversano,et al.  Nutrient ratios and fluxes hint at overlooked processes in the Mediterranean Sea , 2003 .

[3]  S. Marullo,et al.  Open Waters Optical Remote Sensing of the Mediterranean Sea , 2008 .

[4]  Marina Tonani,et al.  under a Creative Commons License. Ocean Science A high-resolution free-surface model of the Mediterranean Sea , 2007 .

[5]  M. Behrenfeld,et al.  IN SEARCH OF A PHYSIOLOGICAL BASIS FOR COVARIATIONS IN LIGHT‐LIMITED AND LIGHT‐SATURATED PHOTOSYNTHESIS 1 , 2004 .

[6]  Elemental composition of seston and nutrient dynamics in the Sea of Marmara , 1998 .

[7]  M. Bell,et al.  MARINE ENVIRONMENT AND SECURITY FOR THE EUROPEAN AREA Toward Operational Oceanography , 2006 .

[8]  T. Kana,et al.  Dynamic model of phytoplankton growth and acclimation: responses of the balanced growth rate and the chlorophyll a:carbon ratio to light, nutrient-limitation and temperature , 1997 .

[9]  Simone Colella,et al.  The Adriatic Sea ecosystem seasonal cycle: Validation of a three‐dimensional numerical model , 2007 .

[10]  F. Rassoulzadegan,et al.  NUTRIENT LIMITATIONS, MICROBIAL FOOD WEBS, AND BIOLOGICAL C-PUMPS - SUGGESTED INTERACTIONS IN A P-LIMITED MEDITERRANEAN , 1995 .

[11]  I. Hoteit,et al.  Assimilation of ocean colour data into a Biogeochemical Flux Model of the Eastern Mediterranean Sea , 2006 .

[12]  A. Navarra,et al.  A generalized model of pelagic biogeochemistry for the global ocean ecosystem. Part II: numerical simulations. , 2007 .

[13]  P. Smolarkiewicz.  A Simple Positive Definite Advection Scheme with Small Implicit Diffusion , 1983 .

[14]  P. Delecluse,et al.  OPA 8.1 Ocean General Circulation Model reference manual , 1998 .

[15]  S. Nixon.  Replacing the Nile: Are Anthropogenic Nutrients Providing the Fertility Once Brought to the Mediterranean by a Great River? , 2003, Ambio.

[16]  A. Crise,et al.  A seasonal three-dimensional study of the nitrogen cycle in the Mediterranean Sea: Part I. Model implementation and numerical results , 1998 .

[17]  W. May,et al.  Response of a complex ecosystem model of the northern Adriatic Sea to a regional climate change scenario , 2003 .

[18]  J. G. Baretta-Bekker,et al.  Microbial dynamics in the marine ecosystem model ERSEM II with decoupled carbon assimilation and nutrient uptake , 1997 .

[19]  Marcello Vichi,et al.  A generalized model of pelagic biogeochemistry for the global ocean ecosystem. Part I: Theory , 2007 .

[20]  Y. Artioli,et al.  Modelling nutrient emissions from river systems and loads to the coastal zone: Po River case study, Italy , 2005 .

[21]  A. Longhurst.  Ecological Geography of the Sea , 1998 .

[22]  Paul J. Somerfield,et al.  Primary and bacterial production in the Mediterranean Sea: a modelling study , 2002 .

[23]  D. Antoine,et al.  Seasonal and interannual variability in algal biomass and primary production in the Mediterranean Sea, as derived from 4 years of SeaWiFS observations , 2004 .

[24]  Antonio Cruzado,et al.  Modelling primary production in the North Sea using the European Regional Seas Ecosystem Model , 1995 .

[25]  A. Crise,et al.  Coupled Mediterranean ecomodel of the phosphorus and nitrogen cycles , 2002 .

[26]  I. Hoteit,et al.  Eastern Mediterranean biogeochemical flux model : simulations of the pelagic ecosystem , 2006 .

[27]  Ed Urban.  Operational Oceanography: Implementation at the European and Regional Scales. Proceedings of the Second International Conference on EuroGOOS , 2003 .

[28]  P. Rossini,et al.  THE ROLE OF ATMOSPHERIC DEPOSITION IN THE BIOGEOCHEMISTRY OF THE MEDITERRANEAN SEA , 1999 .

[29]  Patrick Raimbault,et al.  Primary production, carbon export and nutrients availability in western and eastern Mediterranean Sea in early summer 1996 (MINOS cruise) , 2002 .

[30]  J. Kindle,et al.  Summary diagrams for coupled hydrodynamic-ecosystem model skill assessment , 2009 .

[31]  K. Mann,et al.  Dynamics of Marine Ecosystems , 1991 .

[32]  Martin Gade,et al.  Remote Sensing of the European Seas , 2008 .

[33]  Ǐ. Salihoǧlu,et al.  Elemental composition of seston and nutrient dynamics in the Sea of Marmara , 2004, Hydrobiologia.

[34]  P. De Mey,et al.  The Mediterranean ocean forecasting system: first phase of implementation (1998–2001) , 2003 .