Figure 1
Search results for the synonyms ‘carbon dioxide flux’ (left) and ‘co2 flux’ (right) in the Arctic Data Center’s default search interface, showing different counts and datasets.
Table 1
Examples of queries used by scientists when searching for data about carbon-related processes were restructured (see text) and tested for precision and recall.
| Above-ground net primary production in a grassland, in dimensions of biomass of plant material (with or without area or duration) |
| Soil carbon content in dimensions of amount or mass of carbon per volume of soil or area of surface |
| Concentration of dissolved carbon dioxide, carbonate, or bicarbonate in the water of an aquatic system |
| Carbon dioxide flux in an enrichment experiment in dimensions of amount or mass of carbon per area or volume per time |
| Primary production of coastal macroalgae in dimensions of amount or mass of carbon per area per time |
Figure 2
Results for ten queries against datasets in the DataONE corpus (left: precision, right: recall) Structured Metadata: searched fragments of the natural language query on a subset of metadata fields (title, abstract, and column description); All Text: searched fragments of the natural language query anywhere in metadata; Semantic Annotation: searched on ECSO IDs within semantic metadata only.
Figure 3
Semantic annotation of a dataset containing a carbon dioxide flux measurement, depicting how it is serialized into EML. The subject (accessed by the EML attribute id ‘0As7Fchl6I’), predicate (propertyURI), and object (valueURI) are contained within the boxes. Example taken from: https://arcticdata.io/catalog/view/doi%3A10.18739%2FA25M6275K.
Figure 4
Semantic search interface displaying suggested concepts based on text typed in by the user.
Figure 5
Browsing feature for viewing the annotation term hierarchy in the semantic search interface.
Figure 6
An informational interactive widget is displayed after clicking on an annotated variable (indicated by the ‘check mark’ to the left of the associated variable name). Example taken from: https://arcticdata.io/catalog/view/doi%3A10.18739%2FA25M6275K.