How does it work
The network of data centres engaged in EMODnet Chemistry gathers marine chemistry data sets, both from marine environmental monitoring and scientific research. The gathered data concern data on eutrophication, contaminants and marine litter.
The data gathering is done in direct communication with data originators to ensure the best sets of measured data and related metadata, and to prevent duplicates. The data sets for eutrophication, contaminants, and micro litter are described with metadata and made available in standard formats by means of the SeaDataNet CDI service. This facilitates users to discover and request access to the data sets in a harmonized way and using adapted versions of the SeaDataNet CDI User Interface, which focus on chemistry and the MSFD regions. Data is available in ODV (Ocean Data View) and NetCDF (CF) formats which can be imported to ODV software.
The process from search to getting access to requested data sets is illustrated and explained below. This allows users to retrieve data sets from the distributed data centres in a common way via one unique portal.
The CDI query interface enables to search by a set of criteria. The selected data sets are listed. Geographical locations are indicated on a map. Clicking on the display icon retrieves the full metadata of the data set. This gives information on the what, where, when, how, and who of the data set. It also gives standardised information on the data access restrictions, that apply. The interface features a shopping mechanism, by which selected data sets can be included in a shopping basket.
All users can freely query and browse in the CDI directory; however submitting requests for data access via the shopping basket requires that users are registered in the SeaDataNet central user register, thereby agreeing with the overall SeaDataNet User Licence.
All data requests are forwarded automatically from the EMODnet Chemistry portal to the relevant data providers. This process is controlled via the Request Status Manager (RSM) service at the portal that communicates with the data providers. Users receive a confirmation e-mail of their data set requests and a link to the RSM service. By log-on to the RSM service users can check regularly the status of their requests and download data sets from the associated data providers, once access has been granted. On their turn, data providers can follow via the RSM service all transactions for their data sets online and can handle requests which might require their mediation.
Each CDI metadata record includes a data access restriction tag. It indicates under which conditions the data set is accessible to users. Its values can vary from 'unrestricted' to ‘no access' with a number of values in between. During registration every user will be qualified by its national NODC / Marine Data Centre with one or more SeaDataNet roles. The RSM service combines for each data set request the given data access restriction with the role(s) of the user as registered in the SeaDataNet central user register. This determines per data set request, whether a user gets direct access automatically, whether it first has to be considered by the data centre, that therefore might contact the user, or that no access is given.
Remark: Marine Litter is a new topic for EMODnet Chemistry and has a focus on beach litter, seafloor litter and micro plastics. Data for beach litter and sea floor litter will be gathered, managed and published by means of two central databases, which are developed and populated by EMODnet Chemistry in cooperation with the MSFD Technical Group on Marine Litter (TG-ML), EU JRC, RSC’s, ICES, and several relevant EU projects, regional and local initiatives. For micro plastics it has been decided to adapt the SeaDataNet CDI service approach and dedicated guidelines are formulated in concertation with the TG-ML.