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.
Sperm whale presence at eight different locations between 2012-2021 around Svalbard, Norway, detected using an automated detector and validated manually (visually on spectrograms, and aurally). Daily environmental data for all years and locations used for statistical models (Eastern Fram Strait & Isfjorden recording sites), and for plotting figures for each location.
For exact location coordinates, deployment periods and recording schemes, see Table 1 in publication.
Variables in “sperm_whale_vocal_presence_all_locations.xlsx” :
- Location == recording site
- Year == recording year
- Month == recording month
- Dttime == date and time (hour) of the recording
- Sperm_whale == sperm whale presence as ‘1’ for vocal presence and ‘0’ for vocal absence.
Variables in “environmental_data_all_locations.xlsx” :
- Date == Date (month/day/year)
- Chlorophyll_daily_mean == Daily chlorophyll concentration (mg/m-3) averaged over a 50km area around the hydrophone location
- Primary_production_daily_mean == Daily primary production concentration (mg/m-3) averaged over a 50km area around the hydrophone location
- Zooplankton_daily_mean == Daily zooplankton concentration (g/m-2) averaged over a 50km area around the hydrophone location
- Sea_surface_temperature_daily_mean == Daily sea surface temperature (°C) averaged over a 50km area around the hydrophone location
- Very_close_drift_ice == Proportion of the 50km area around the hydrophone location that is covered by this ice category
- Close_drift_ice == Proportion of the 50km area around the hydrophone location that is covered by this ice category
- Very_open_drift_ice == Proportion of the 50km area around the hydrophone location that is covered by this ice category
- Open_water == Proportion of the 50km area around the hydrophone location that is covered by this ice category
- Fast_ice == Proportion of the 50km area around the hydrophone location that is covered by this ice category
- total_ice extent == Proportion of the 50km area around the hydrophone location that is covered by ice (all categories but “open_water” pooled together).
Environmental data were retrieved from reanalysis datasets using EU Copernicus Marine Service Information: Chlorophyll mass concentration and net primary production of biomass were obtained in 0.25° × 0.25° spatial resolution (https://doi.org/10.48670/moi-00019); zooplankton mass content expressed as carbon in sea water were obtained in 0.083° × 0.083° spatial resolution (https://doi.org/10.48670/moi-00020); and sea surface temperature was obtained in 0.05° × 0.05° spatial resolution (Goold et al., 2020; https://doi.org/10.3390/rs12040720). Daily sea ice data was retrieved from the Norwegian Meteorological Institute (https://cryo.met.no/) .