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The coastal area is the most productive and dynamic environment of the world ocean with significant resources and services for mankind. JERICO-NEXT emphasizes thatthe complexity of the coastal ocean cannot be well understood if interconnection between physics, biogeochemistry and biology is not guaranteed. Such an integration requires new technological developments allowing continuous monitoring of a larger set of parameters. The objective of JERICO-NEXT consists in strengthening and enlarging a solid and transparent European network in providing operational services for the timely, continuous and sustainable delivery of high quality environmental data and information products related to marine environment in European coastal seas.The best practice of technologies, methodologies and procedures is a vital step in ensuring efficiency and optimal returns from any kind of distributed, heterogeneous, multifaceted, coastal observing infrastructure operating on a transnational level like the JERICO network. The JERICO network is always striving to increase its suite of sensors to anticipate likely future demands. As part of this effort, it is now implementing a variety of sensors for a number of bio-geochemical measurements. While Task 2.4 of JERICO-NEXT dealt with the harmonization of these sensors and their underlying technologies,this report provides information on Best Practice in the utilization of sensors used for measuring nutrients (lead: CEFAS), biology-related optical properties (lead: SYKE), variables of the marine carbonate system (lead: NIVA),and for coastal profiling (lead: CNR). This deliverable will also inform on the outcome and results of the workshopsthat weredealing with its topic during the project. Published Contributors: Naomi Greenwood , Chris Read, Agathe Laes-Huon, Anne Daniel, Karel Bakker, Daniel Blandfort , Martina Gehrung , Pasi Ylöstalo , Lumi Haraguchi , Jani Ruohola , Bengt Karlson , Felipe Artigas , Fabrice Lizon , Melilotus Thyssen , Guillaume Wacquet , Manolis Ntoumas , Veronique Créach , Pierre Jaccard , Laurent Delauney , Jukka Seppälä , Andrew L. King, Kai Sørensen, Sabine Marty , Anna Wranne Willstrand , Lauri Laakso , Carolina Cantoni , Wilhelm Petersen, Yoana Voynova, Klas Ove Möller , Michela Martinelli , Refereed Current 14.A Nutrients Inorganic carbon Best Practice Manual (incl. handbook, guide, cookbook etc)

This handbook collects the “best practices” in all phases of the system covering the entire infrastructural chain of data acquisition. It includes recommendations on how to produce high quality data aiming towards common methodologies and protocols within the FixO3 network. The Fixed point Open Ocean Observatory network (FixO3) seeks to integrate European open ocean fixed point observatories and to improve access to these key installations for the broader community. This network integrates open ocean moorings, surface buoys and deep cable observatories included in the ERIC EMSO. Unpublished Current

The purpose of this manual is to provide guidance to the U.S. IOOS and the dissolved nutrients (DN) community at large for the real-time QC of DN measurements using an agreed-upon, documented, and implemented standard process. This manual is also a deliverable to the U.S. IOOS Regional Associations and the ocean observing community and represents a contribution to a collection of core variable QC documents. Published Refereed Current

This best practice specifies the test items, test equipment, test environmental conditions, test methods of the seawater nutrients analyser (hereinafter referred to as the instrument) and requirements for the compilation of the test reports. This best practice is applicable to the test of seawater nutrients automatic analyser being long-term used underwater. Published Refereed Current 14.A Nutrients TRL 2 Technology concept and/or application formulated Best Practice Guide