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)
The information required to properly cite a dataset is normally provided in the discovery metadata the datasets.
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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 through the drop down menu above the text field. Text strings that are not quoted are treated as separate words and will match any of the words (i.e. assuming the OR operator). Phrases may be prefixed with '-' to indicate no occurence of the phrase in the results.
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 data has been collected during the Nansen Legacy Joint Cruise 3 from 19 February – 11 March 2022 on research vessel Kronprins Haakon (cruise number 2022702), along a transect in the northern Barents Sea from 76N to 82N. The dataset contains abundance of ice algae marine protists, including ice algae (autotrophic) and protozoa (heterotrophic). Protists were identified and counted with light microscopy using the Utermöhl method and the result are given as cells per liter (cells/L) called organismQuantity.
Sampling method:
The samples were collected with Kovacs ice corer 9 cm diameter (Kovacs Enterprise). The samples were collected from the bottom part of the ice core at the following dept layers: 0-3 cm, 3-10 cm, 10-20 cm & 20-30 cm. The ice cores were transferred to a clean bucket and 100mL filtered sea water were added per 1 cm of sea ice and melted at 4°C. When the ice core was melted, 95 mL of the sample was transferred into 100 ml brown glass bottle. The samples were preserved using an aldehyde mixture of glutaraldehyde and hexamethylenetetramine-buffered formalin at final concentrations of 0.1% and 1% respectively.
Analyse method:
All samples have been analysed at Institute of Oceanology of the Polish Academy of Sciences (IOPAN). The organisms were identified and counted under an inverted microscope according to the Utermöhl method.
Header name index - events
- expedition: cruise number for R/V Kronprins Haakon
- eventID: UUID for the sample
- parentID: UUID for the gear deployment (each ice core has a unique parentID)
- eventDate: the date-time when an event occurred, using ISO 8601-1:2019 format (2020-07-27T07:16:03.446Z).
- fieldNumber: human-readable sample ID (e.g. IAT-001)
- locationID: station name
- decimalLongitude: geographic latitude (in decimal degrees, using the spatial reference system given in geodetic datum)
- decimalLatitude: geographic longitude (in decimal degrees, using the spatial reference system given in geodeticDatum)
- maximumDepthInCentimeters: bottom depth of the core section in cm
- minimumDepthInCentimeters: upper depth of the core section in cm
- eventRemarks: comments or remarks about the event (free text field)
- gearType: the gear used to take the sample e.g. Ice corer 9 cm
- samplingDepthInMeters: depth sampled
- sampleType: description of the sample type according to a standard list
- recordedBy: name of the person who took the samples
- principalInvestigatorName: name of the person in charge of the sample collection
- principalInvestigatorEmail: email address of the person in charge of the sample collection
- principalInvestigatorInstitution: affiliated institution of the person in charge of the sample collection
- seaIceCoreLengthInCentimeters: length of ice core in centimeters
- seaIceThicknessInCentimeters: thickness of sea ice in centimeters
- seaIceFreeboardInCentimeters: freeboard of sea ice centimeters
- snowDepthInCentimeters: 3 replicates of snow depth at coring site
- totalMeltedVolumeL: The total melted volume in L recorded during sampling.
- addedFSWvolumeL: Volume in L of filtered sea water added to the sample during melting
Header name index - occurrence
- scientificName: full scientific name of the identified organism at the lowest taxonomic level that can be ascertained. The scientificName should be selected from a drop-down menu linked to the list in taxonomy sheet. (e.g Nitzschia frigida).
- identificationQualifier: A standard term (sp., spp., and indet.) to express the determiner’s doubts about the Identification.
- lifeStage: the life stage (e.g. resting spore) of the organism
- sizeGroupOperator: describes if the size group is less than or greater than a value (It = less than, gte = greater or equal to)
- sizeGroup: the size group in µm.
- organismRemark: indicates e.g. varieties, colony type
- identificationRemarks: a free text field for adding information relevant to the analysis
- identifiedBy: person who did the lab-analyse
- identifiedBy: Drop-down menu linked to list in people-sheet
- dateIdentified: Date for the analysis
- fieldsInCount: Number of fields counted in the microscope
- magnificationMicroscope: The magnification setting used during analysis. Selected from a drop-down menu linked to vocab-sheet
- maxFields: Number of fields in the entire sedimentation chamber (Related to magnification used)
- takenVolumeML: The volume taken for sedimentation in the Utermöhl chamber (the sub-sample taken for analysis)
- initialVolumeL: The total volume in L of the melted core, measured during sampling. If it wasn’t measured one can use the theoretical calculated core volume based on diameter of the core. initialVolumeL=(totalMeltedVolumeL-addedFSWvolumeL)) or teoreticalCoreVolumeL = coreAreM*(maxDepthCM-minDepthCM)
- sampleSizeValue=((fieldsInCount/maxFields)(takenVolumeML/conversionMLtoL))(dilutionFactorFormaldehyde*dilutionFactorFSW)), dilutionFactorFormaldehyde = 0.95, dilutionFactorFSW=
- sampleSizeUnit: liter (l)
- organismQuantity: the quantity of the organism per volume water in the environment (organismQuantity = individualCount/sampleSizeValue)
- organismQuantityType: cells/l
- cellsPerM2: The quantity (number of cells) of the organism per area (m2). cellsPerM2 = ((individualCount/(sampleSizeValue/initialVolumeL))/coreAreaM
Funding:
The Nansen Legacy is funded by the Research Council of Norway and the Norwegian Ministry of Education and Research. They provide 50% of the budget while the participating institutions contribute 50% in-kind. The total budget for the Nansen Legacy project is 740 mill. NOK.
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.
This dataset is a collection of flow cytometry measurements (abundance of virus, bacteria and small protists (primarily <20μm)) taken as part of the Nansen Legacy project (www.arvenetternansen.com), as part of the '2021 Seasonal Study Q2' cruise (2021704). The data are collected from a CTD-rosette with Niskin bottles from station NLEG23 taken on 2021-05-12T14:01:17.279Z at 81.6293866666667°N and 30.6535819°E.
This dataset is a collection of flow cytometry measurements (abundance of virus, bacteria and small protists (primarily <20μm)) taken as part of the Nansen Legacy project (www.arvenetternansen.com), as part of the '2021 Seasonal Study Q2' cruise (2021704). The data are collected from a CTD-rosette with Niskin bottles from station NLEG02 taken on 2021-05-01T13:32:17.141Z at 76.4998728666667°N and 31.2184039166667°E.
This dataset is a collection of flow cytometry measurements (abundance of virus, bacteria and small protists (primarily <20<b5>m)) taken as part of the Nansen Legacy project (www.arvenetternansen.com), as part of the '2021 Joint Cruise 2-2' cruise (2021710). The data are collected from CTD with Niskin bottles, meltpond data collected with a bucket, and sea ice core samples collected with a Kovacs 9 cm ice corer from station P8 (NLEG29) taken on 2021-09-02T09:06:07.83Z at 83.832435450N and 24.946595850E.
This dataset is a collection of flow cytometry measurements (abundance of virus, bacteria and small protists (primarily <20μm)) taken as part of the Nansen Legacy project (www.arvenetternansen.com), as part of the '2021 Joint Cruise 2-1' cruise (2021708). The data are collected from a CTD-rosette with Niskin bottles from station P7 (NLEG25) taken on 2021-07-24T14:30:11.584Z at 81.9816380333333°N and 29.9783854°E.
This dataset is a collection of flow cytometry measurements (abundance of virus, bacteria and small protists (primarily <20μm)) taken as part of the Nansen Legacy project (www.arvenetternansen.com), as part of the '2021 Seasonal Study Q2' cruise (2021704). The data are collected from a CTD-rosette with Niskin bottles from station P6 (NLEG21) taken on 2021-05-10T21:45:30.024Z at 81.54993205°N and 30.8167937166667°E.
This dataset is a collection of flow cytometry measurements (abundance of virus, bacteria and small protists (primarily <20μm)) taken as part of the Nansen Legacy project (www.arvenetternansen.com), as part of the '2021 Seasonal Study Q1' cruise (2021703; from March 2nd to 24th in 2021). The data are collected from a CTD-rosette with Niskin bottles from stations located in the Northern Barents Sea.
This dataset is a collection of flow cytometry measurements (abundance of virus, bacteria and small protists (primarily <20μm)) taken as part of the Nansen Legacy project (www.arvenetternansen.com), as part of the '2021 Seasonal Study Q1' cruise (2021703). The data are collected from a CTD-rosette with Niskin bottles from station P4 (NLEG11) taken on 2021-03-11T01:21:41.488Z at 79.77769035°N and 33.6720917166667°E.
This dataset is a collection of flow cytometry measurements (abundance of virus, bacteria and small protists (primarily <20μm)) taken as part of the Nansen Legacy project (www.arvenetternansen.com), as part of the '2019 Seasonal Study Q3' cruise (2019706). The data are collected from a CTD-rosette with Niskin bottles from station NLEG19 taken on 2019-08-17T10:04:00Z at 81.4593°N and 31.0778°E.
This dataset is a collection of flow cytometry measurements (abundance of virus, bacteria and small protists (primarily <20μm)) taken as part of the Nansen Legacy project (www.arvenetternansen.com), as part of the '2021 Seasonal Study Q2' cruise (2021704). The data are collected from a CTD-rosette with Niskin bottles from station NLEG09 taken on 2021-05-04T09:21:39.815Z at 79.25135305°N and 33.96793005°E.
This dataset is a collection of flow cytometry measurements (abundance of virus, bacteria and small protists (primarily <20μm)) taken as part of the Nansen Legacy project (www.arvenetternansen.com), as part of the '2021 Joint Cruise 2-1' cruise (2021708). The data are collected from a CTD-rosette with Niskin bottles from station NLEG05 taken on 2021-07-16T17:20:48.085Z at 78.0000429666667°N and 33.9998725°E.
This dataset is a collection of flow cytometry measurements (abundance of virus, bacteria and small protists (primarily <20μm)) taken as part of the Nansen Legacy project (www.arvenetternansen.com), as part of the '2019 Seasonal Study Q3' cruise (2019706). The data are collected from a CTD-rosette with Niskin bottles from station NLEG08 taken on 2019-08-13T09:40:00Z at 79.0003°N and 33.9997°E.
This dataset is a collection of flow cytometry measurements (abundance of virus, bacteria and small protists (primarily <20μm)) taken as part of the Nansen Legacy project (www.arvenetternansen.com), as part of the '2021 Seasonal Study Q1' cruise (2021703). The data are collected from a CTD-rosette with Niskin bottles from station P2 (NLEG04) taken on 2021-03-07T03:32:11.227Z at 77.5006682666667°N and 33.9980424666667°E.
This dataset is a collection of flow cytometry measurements (abundance of virus, bacteria and small protists (primarily <20μm)) taken as part of the Nansen Legacy project (www.arvenetternansen.com), as part of the '2021 Seasonal Study Q2' cruise (2021704). The data are collected from a CTD-rosette with Niskin bottles from station P4 (NLEG11) taken on 2021-05-05T17:15:10.521Z at 79.6797513833333°N and 33.55612085°E.