1. SeaDataNet and Emodnet Chemistry Alexander Barth (1), Michele Fichaut (2), Dick Schaap (3), Alessandra Giorgetti (4), Matteo Vinci (4) (1) University of Liège (Belgium), (2) Ifremer (France), (3) MARIS (Netherlands), (4) OGS (Italy)

2. 2 In a nutshell... ● SeaDataNet I/II: ● EU FP 7 project, 45 oceanographic data centres from 35 countries ● Aim to develop a standardized infrastructure for managing diverse data sets collected by oceanographic fleets and automatic observing systems. ● EMODNET Chemistry: ● EMODNET is a pilot component for a final operational European Marine Observation and Data Network, launched by the Directorate-General for Maritime Affairs and Fisheries (DG MARE) ● Aims to assemble fragmented and inaccessible marine data into interoperable, continuous and publicly available data streams ● Based on SeaDataNet infrastructure

3. 3 SeaDataNet: from data discovery to unified access to analysis Search for in situ data Analyse observations

4. 4 SeaDataNet Data Policy and implementation ● Metadata and data products ● free and open access, no registration required ● each data centre is obliged to provide the meta- data in standardized format: Common Data Index (CDI) based on XML ISO 19115. ● Data ● the general case is free and open access ● however users must register once and agree with the “SeaDataNet User Licence” ● Licence is part of the SeaDataNet Data Policy, that is intended to be fully compatible with the Directive of the European Parliament and of the Council on public access to environmental information, the INSPIRE Directive, IOC, ICES, WMO, GCOS, GEOSS and CLIVAR data principles. ● Each user gets a SeaDataNet Role; while each CDI record has a ‘Data access restriction’ label. The combination of role and access label determines ‘access OK’, ‘access to be discussed’ or ‘access denied’

5. 5 Infrastructure and services ● Standard vocabularies ● Interconnected directory services (for marine organizations, data sets, ocean observing systems,...) ● Visualization and analysis software: ● Ocean Data View ● DIVA and Diva-on-web ● OceanBrowser

6. 6 CDI Service as common service in many projects www.geo-seas.eu www.emodnet-hydrography.eu www.blackseascene.net www.emodnet-physics.eu www.caspinfo.net www.emodnet-chemistry.eu SeaDataNet CDI Service

7. 7 Emodnet Chemical lot ● Focus on North Sea, Black Sea and Mediterranean Sea ● Choice based on MSFD requirements ● 17 selected chemicals (pesticides, antifoulants, pharmaceuticals, heavy metals, hydrocarbons, radionuclides, fertilisers and organic matter) for data products: ● Interpolated maps (if coverage is sufficient) ● Time series

8. 8 The gridding problem ● Problem: how to determine a field on a regular grid based on arbitrarily located observations?

9. 9 Data-Interpolating Variational Analysis ● Simple linear interpolation does not work if observations have noise ● DIVA formulation (Brasseur et al. 1996, Troupin et al. 2012) ● The DIVA analysis minimizes a quadratic cost function on a finite element grid

10. 10 Diva-on-web ● Creates gridded fields ● http://gher-diva.phys.ulg.ac.be/web- vis/diva.html http://gher-diva.phys.ulg.ac.be/web- vis/diva.html ● (http://tinyurl.com/divaonweb)http://tinyurl.com/divaonweb

11. 11 OceanBrowser ● Horizontal views ● Vertical views ● Animations ● Layers can be customized ● Download (NetCDF/OPeND AP/KML/Image) ● Search function Overlay of different data products

12. 12 Vertical sections

13. 13 New features under development ● Search for layers ● User feedback

14. 14 OceanBrowser 3D ● Experimental 3D version (based on WebGL) ● User library EarthGL (tinyurl.com/Earth GL)tinyurl.com/Earth GL ● No browser plug- in required

15. 15 Conclusions ● SeaDataNet contains more than 1 million CDI entries (88% unrestricted or under SeaDataNet licence) ● Infrastructure adopted and adapted in different projects ● Various tools and services available ● In situ data analysis tool DIVA and visualization services are actively developed www.seadatan et.org www.emodnet-chemistry.eu

16. 16 Additional informations

17. 17 List of Emodnet Chemical parameters

18. 18 SeaDataNet licence ● The Licence incorporates the following terms: ● The Licensor grants to the Licensee a non- exclusive and non-transferable licence to retrieve and use data sets and products from the SeaDatanet service in accordance with this licence. ● Retrieval, by electronic download, and the use of Data Sets is free of charge, unless otherwise stipulated. ● Regardless of whether the data are quality controlled or not, SeaDataNet and the data source do not accept any liability for the correctness and/or appropriate interpretation of the data. Interpretation should follow scientific rules and is always the user’s responsibility. Correct and appropriate data interpretation is solely the responsibility of data users. ● Users must acknowledge data sources. It is not ethical to publish data without proper attribution or co-authorship. Any person making substantial use of data must communicate with the data source prior to publication, and should possibly consider the data source(s) for co- authorship of published results. ● Data Users should not give to third parties any SeaDataNet data or product without prior consent from the source Data Centre. ● Data Users must respect any and all restrictions on the use or reproduction of data. The use or reproduction of data for commercial purpose might require prior written permission from the data source.