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 covers the marine biological transect from Kongsfjorden to Fram Strait (KongHau transect) within the framework of the Environmental monitoring of Svalbard and Jan Mayen (http://www.mosj.no/en/) program. The data set covers summers 2009-2014 for nutrients and chlorophyll a (Chl a) and summer 2009-2013 for protist (including phytoplankton and protozooplankton) abundance. The results published in Hegseth et al. 2019 (see the “Citation Custom” field) are based on this data set. Norwegian Polar Institute”s marine database will contain extended data from the KongHau transect, and any users post-2019 are encouraged to use the extended data set instead.
Quality
The data set is compiled in three files:
Protist_abundance_Kongsfjorden2009-2013_Hegseth et al contains protist abundance data in cells per liter for each taxon identified in light microscopy at the Institute of Oceanology, Polish Academy of Science. Through the SampleID column the abundance data set can be linked to the metadata set. The column AphiaID refers to the taxonomic identifier in the World Register of Marine Species (WoRMS).
Nutrients&Chla_Kongsfjorden2009-2014_Hegseth et al contains nutrient data (nitrate (NO3), nitrite (NO2), phosphate (P), silicate (Si) and ammonium (NH4)) in µmol per liter and chlorophyll a data in µg per liter. Through the SampleID column the nutrient and Chl a data set can be linked to the metadata set.
Metadata_Kongsfjorden2009-2014_Hegseth et al contains metadata for nutrients, Chl a and protist abundance. Columns: SampleID = row name in nutrient and Chl a and protist abundance data; Program = name of the program; ship = name of the research vessel; station = standard station name across the MOSJ transect; Year = Year; Latitude = Latitude as decimal degrees; Longitude = Longitude as decimal degrees; Bottom depth = water depth at the respective station; Sampling date = date in yyyy-mm-dd format; Gear = gear used to collect the sample; Depth = Sampling depth; Sample Type = Taxonomy for protist abundance, CHLA for chlorophyll a and Nutrients for Nutrients; Sample staff = person collected the sample; comment = specific comments concerning the sample.