The core partner data centres that are integrated in NorDataNet are listed in https://www.nordatanet.no/en/node/69. In addition to this NorDataNet harvests information on relevant datasets from a number of other data centres. The data centre responsible for the data presented is usually (but not always) listed in the discovery metadata. In essence NorDataNet is an aggregating service that combines information from a number of existing data centres.
Citation of data and service
If you use data retrieved through this portal, please acknowledge our funding source:
Research Council of Norway, project number 245967/F50, Norwegian Scientific Data Network.
Always remember to cite data when used!
Citation information for individual datasets is often provided in the metadata. However, not all datasets have this information embedded in the discovery metadata. On a general basis a citation of a dataset include the same components as any other citation:
author, title,
year of publication,
publisher (for data this is often the archive where it is housed),
edition or version,
access information (a URL or persistent identifier, e.g. DOI if provided)
All partner repositories of NorDataNet support Digital Object Identifiers (DOI), but not all datasets are minted. Whether or not minted depends often on source of the data (e.g. operational data are often yet not minted). However, all data centres support persistent identifiers according to local systems. The information required to properly cite a dataset is normally provided in the discovery metadata the datasets.
Brief user guide
The Data Access Portal has information in 3 columns. An outline of the content in these columns is provided above. When first entering the search interface, all potential datasets are listed. Datasets are indicated in the map and results tabulation elements which are located in the middle column. The order of results can be modified using the "Sort by" option in the left column. On top of this column is normally relevant guidance information to user presented as collapsible elements.
If the user want to refine the search, this can be done by constraining the bounding box search. This is done in the map - the listing of datasets is automatically updated. Date constraints can be added in the left column. For these to take effect, the user has to push the button marked search. In the left column it is also possible to specific text elements to search for in the datasets. Again pushing the button marked "Search" is necessary for these to take action. Complex search patterns can be constructed using logical operators identified in the drop down menu with and phrases embedded in quotation marks. Prefixing a phrase with '-' negates the phrase (i.e. should not occur in the results). Searches are case insensitive.
Other elements indicated in the left and right columns are facet searches, i.e. these are keywords that are found in the datasets and all datasets that contain these specific keywords in the appropriate metadata elements are listed together. Further refinement can be done using full text, date or bounding box constraints. Individuals, organisations and data centres involved in generating or curating the datasets are listed in the facets in the right column. The combination of search fields (including facets) is based on a logical "AND" combination of the fields, i.e. all conditions are fulfilled for the results provided.
The data set includes quality-controlled, 1-decibar vertically interpolated Seaglider observations of water column temperature and salinity profiles in the upper 1000 m, and depth averaged currents in the Lofoten Basin of the Norwegian Sea. The data set is presented in Yu et al. (2017, doi:10.1002/2017JC012982, The Lofoten Basin Eddy: Three years of evolution as observed by Seagliders. J. Geophys. Res. Oceans).
The observations were provided by the Norwegian Atlantic Current Observatory (NACO) and the data set is prepared and used in the ProVoLo project (Watermass transformation processes and vortex dynamics in the Lofoten Basin of the Norwegian Sea), both funded by the Norwegian Research Council.
The glider raw data were processed using the University of East Anglia.
Seaglider toolbox
(http://bitbucket.org/bastienqueste/uea-seaglider-toolbox). Outputs from the toolbox are separated into dives and climbs and vertically interpolated at a regular 1decibar interval. Further hard limits on salinity and temperature were applied to exclude and interpolate outliers.
Conservative Temperature and Absolute Salinity measurements were compared to available hydrographic data managed by the Institute of Marine Research in Bergen, Norway. Absolute Salinity was corrected by a small constant offset obtained by a least-squares fitting of the glider data between 700 m and 1000 m to reference linear T/S relationship corresponding to the mixing line between the Atlantic Water and the deep waters below 700 m. The Conservative Temperature and Absolute Salinity data were converted back to temperature at ITS-90 scale and salinity at the practical salinity scale for archiving.