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.
Spatiotemporal variability in mortality and growth of fish larvae and zooplankton in the Lofoten-Barents Sea ecosystem, The Nansen Legacy (SVIM, NLEG)
Institutions: Institute of Marine Reseach - Norway, Norwegian Meteorological Institute, Norwegian Meteorological Institute, Norwegian Meteorological Institute
Last metadata update: 2024-01-03T11:42:12Z
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Abstract:
The SVIM archive contains results from an ocean and sea ice hindcast. The original version of the archive covered the period 1960-2011, and has later been extended on several occasions. The results are provided on a 4km polar stereographic grid projection, and the ocean model has a vertical resolution of 32 s layers. The focus is an adequate representation of the Atlantic influenced water masses within the Nordic Seas and the Barents Sea. Less emphasize has been put on the areas downstream of the Arctic bound Atlantic Water flow, i.e. the Arctic Ocean and the Greenland Sea. There were multiple aims for this product, including (1) process studies within physical oceanography, (2) representation of oceanographic conditions for other applications such as primary production models and individual-based models for zoo- and ichtyoplankton, (3) boundary values for smaller scale model studies. For ocean circulation the Regional Ocean Modeling System (ROMS; https://www.myroms.org/) was used (v.3.2 up to and including September 2018, v.3.5 thereafter). The sea-ice model used is similar to the module described in Budgell (Ocean Dyn. 2005). Boundary values for the ocean model were derived from the Simple Ocean Data Assimilation dataset (SODA v.2.1.6), while boundary values for the sea ice conditions were taken from a regional simulation (Sandø et al., JGR 2012). After 2008, the ocean boundaries were forced with monthly climatologies from 2000-2008, while for ice conditions after 2007, the 2000-2007 monthly climatologies were used. Tidal forcing was based on the global ocean tides model TPXO4. The quality of the model results for the original archive period were assessed by Lien et al. (2013; https://www.hi.no/resources/publikasjoner/fisken-og-havet/2013/fh_7-2013_swim_til_web.pdf).
Spatiotemporal variability in mortality and growth of fish larvae and zooplankton in the Lofoten-Barents Sea ecosystem, The Nansen Legacy (SVIM, NLEG)
Institutions: Institute of Marine Reseach - Norway, Norwegian Meteorological Institute, Norwegian Meteorological Institute, Norwegian Meteorological Institute
Last metadata update: 2024-01-03T11:42:12Z
Show more...
Abstract:
The SVIM archive contains results from an ocean and sea ice hindcast. The original version of the archive covered the period 1960-2011, and has later been extended on several occasions. The results are provided on a 4km polar stereographic grid projection, and the ocean model has a vertical resolution of 32 s layers. The focus is an adequate representation of the Atlantic influenced water masses within the Nordic Seas and the Barents Sea. Less emphasize has been put on the areas downstream of the Arctic bound Atlantic Water flow, i.e. the Arctic Ocean and the Greenland Sea. There were multiple aims for this product, including (1) process studies within physical oceanography, (2) representation of oceanographic conditions for other applications such as primary production models and individual-based models for zoo- and ichtyoplankton, (3) boundary values for smaller scale model studies. For ocean circulation the Regional Ocean Modeling System (ROMS; https://www.myroms.org/) was used (v.3.2 up to and including September 2018, v.3.5 thereafter). The sea-ice model used is similar to the module described in Budgell (Ocean Dyn. 2005). Boundary values for the ocean model were derived from the Simple Ocean Data Assimilation dataset (SODA v.2.1.6), while boundary values for the sea ice conditions were taken from a regional simulation (Sandø et al., JGR 2012). After 2008, the ocean boundaries were forced with monthly climatologies from 2000-2008, while for ice conditions after 2007, the 2000-2007 monthly climatologies were used. Tidal forcing was based on the global ocean tides model TPXO4. The quality of the model results for the original archive period were assessed by Lien et al. (2013; https://www.hi.no/resources/publikasjoner/fisken-og-havet/2013/fh_7-2013_swim_til_web.pdf).
Centre for Sustainable Arctic Marine and Coastal Technology, Arctic Offshore and Coastal Engineering in a Changing Climate, Programme for International Partnerships for Excellent Education, Research, and Innovation, Dynamics of Floating Ice, Large-scale Programme for Petroleum Research, Survey to assess harp and hooded seal pup production in the Greenland sea pack-ice in 2018, Integrated System for Operations in Polar Seas, Nansen Legacy, Dynamics of Floating ice, Australian Antarctic Program projects 4593 and 4506, Joyce Lambert Antarctic Research Fund grant no. 604086, Research Council of Norway grant no. 280625, Fram 2020, Arctic Challenge for Sustainability II, JSPS KAKENHI Grant Numbers JP 19H00801, 19H05512, 21K14357 and 22H00241, Survey to assess harp and hooded seal pup production in the Greenland sea pack-ice in 2022, SURVEYS TO ASSESS HARP AND HOODED SEAL PUP PRODUCTION IN THE GREENLAND SEA PACK-ICE IN 2022 (SAMCoT, AOCEC, INTPART, DOFI, PTEROMAKS2, ISOPS, AeN, ArCS II)
Institutions: Norwegian Meteorological Institute (MET), University of Melbourne, College of Fisheries and Ocean Sciences, University of Tokyo, Havforskningsinstituttet, Norwegian Meteorological Institute / Arctic Data Centre
Sea ice drift trajectories and waves in sea ice data collected over the period 2017-2022 by a consortium of researchers, both in the Arctic and the Antarctic.
The dataset presents the list with essential details on the Synthetic aperture radar (SAR) images acquired during the series of Nansen Legacy cruises. The cruises were conducted during 2018-2022 with the Norwegian ice-going research vessel Kronprins Haakon (KPH) to the northern Barents Sea, area north of Svalbard and further into the central Arctic, namely Nansen and Amundsen basins.
For more details on the Nansen Legacy project (Norwegian: “Arven etter Nansen”), research goals, sampling strategy and the associated activities please follow the link https://arvenetternansen.com/.
The acquired scenes comprise primarily of Radarsat-2 (RS-2) imagery. Some images were also acquired by TerraSAR-X (TSX). The scenes were ordered for various sea ice research and focus on areas that were sea-ice covered at the times of the cruises. The timings of the ordered acquisitions were set to overlap with the actual planned sea ice station or/and helicopter borne EM ice thickness surveys. However, due to a minimal time lapse of 3 days (RS-2) or 24 hours (TSX) between the ordering deadline and the actual acquisition, the drift of sea ice as well as adjustments in cruise plans, it was often not possible to ensure an overlap between the scene and the actual activity in the scene bounding box. When the onsite activity such as the ice station or EM-survey did fall into the bounding box of the acquired scene, this event was noted in the “Comment” field of the presented dataset.
One should note that the images were acquired for different applications and hence feature different major settings such as incidence angles, mode and polarization, etc. These are also indicated in the presented dataset. For the use of actual images or products derived from the images (e.g. classified scenes), interested users are advised to contact the respective points of contact for the dataset at NPI and UiT.
The list of SAR scenes is available as Excel and csv files.
The Nansen Legacy cruise Q1 was part of the seasonal investigation of the northern Barents Sea and adjacent Arctic Basin. The cruise was conducted in 2-24 March 2021 onboard R/V Kronprins Haakon, and focused on studying the physical, chemical and biological conditions along the Nansen Legacy main transect in open waters and within the sea ice. While in sea ice we conducted ten regional scale sea ice helicopter-borne surveys of ice conditions along the Nansen Legacy transect using a helicopter-borne electromagnetic instrument (HEM) EM-bird. This dataset presents processed EM-bird data on total snow and sea-ice thickness along the flight tracks.
This is a contribution to the Research Council of Norway project “Nansen Legacy” (https://arvenetternansen.com/), WP RF-1 “Physical drivers”.
Quality
See the attached docuement “AeN_Q1_202103_HEM_icethickness_metadata_v1.0.pdf” for details on the data acqusition, processing and structure.
The dataset includes water column measurements of spectral beam attenuation and absorption coefficients by non-water constituents. Measurements were collected in May 2021 during cruise 2021704, Q2, in the northern Barents Sea as part of the Nansen Legacy project. The WET Labs ac-s spectrophotometer (Seabird Scientific) were used to collect in situ profiles, with a constant descent velocity (∼0.3 m/s) down to a depth of 350 m, or ~10 m below the ocean floor. Measurements were corrected for temperature and salinity effects. The proportional method was used to correct the scattering error of the absorption measurements, assuming zero absorption at 709 nm. The measurements were binned with 2.0 m (dbar) spacing, applying the median to average the data. See the referenced article for more information.
Time-series data from moorings covering the Svalbard Branch of the Atlantic Water inflow over the upper continental slope north of Svalbard, Sep 2017 to Nov 2019. The data comprise temperature, salinity and other parameters from CTDs, and water currents from ADCPs.
Data are published as individual time-series files from the different instruments. Both raw (RDI .000 format) and processed (netCDF) ADCP data are published.
Quality
Data processed with standard software from the instrument manufacturers plus additional quality controls to remove bad data points. Details of ADCP processing and quality control are described in the documentation PDF.
Ocean data from two ocean moorings, M1 and M2. Both were Nansen Legacy gateway moorings deployed in the northern Barents Sea at potential “gateways” of ocean exchange with the north and east. The moorings were equipped with ADCPs measuring ocean currents, and temperature and conductivity-temperature-pressure sensors at various points along the mooring line:
- Conductivity, temperature, and pressure from RBR Concerto and SBE16plus v2 instruments.
- Temperature from RBR Solo instruments.
- Near-surface ocean currents from upward-looking Nortek Signature 500 kHz ADCP instruments.
- Water column currents from upward-looking RDI 150 kHz ADCP instruments.
The current version of the dataset (V1) contains data from three deployments of M1 and M2, covering the period from October 2018 to November 2021. At the M1 mooring, there is a gap between the end of the second deployment (21.09.2020) and the start of the third one (20.02.2021).
The document M1_M2_data_processing_details_2018_2020.pdf contains details about the data and processing, as well as important information for users of the data. The follow-up document mooring_processing_m1_m2_2020_2021.pdf contains additional data from the third deployment
The Norwegian Polar Institute is the owner of all the instrumentation described in this document, and was responsible for data processing and documentation. Data are freely available under a CC-BY 4.0 license.
Version history
V1 (27-07-2022): Created dataset, uploaded raw and processed data for M1 and M2 (2018-2020) with documentation.
- 24-05-2024: Added processed CTD data from M1-3 (2021 deployment).
- 07-06-2024: Added processed CTD data from M2-3 (2020-2021 deployment).
Files
Processed data are organized per mooring and deployment. E.g., m1_2.zip contain processed data from deployment 2 (2019-2020) of the M1 mooring, etc. All raw data are collected in raw_m1m2_2018_2020.zip and raw_m1m2_2020_2021.zip.
For the third deployment (2020-2021), there are separate files for CTD and current data from each mooring.
Quality
Data are available both in raw form and as netCDF files with processed data.
The document M1_M2_data_processing_details_2018_2020.pdf and the follow up mooring_processing_m1_m2_2020_2021.pdf contain further details about the data and processing, as well as important information for users. This includes important caveats about a.a. sensor position in the water column, current headings, and ad hoc drift corrections applied to salinity data. Please read relevant sections of these documents before using data!
Time-series data from moorings covering the Svalbard Branch of the Atlantic Water inflow over the upper continental slope north of Svalbard, Sep 2013 to Sep 2015. The data comprise temperature, salinity and other parameters from CTDs, and water currents from ADCPs.
Data are published as individual time-series files from the different instruments. Both raw (RDI .000 format) and processed (netCDF) ADCP data are published.
Quality
Data processed with standard software from the instrument manufacturers plus additional quality controls to remove bad data points. Details of ADCP processing and quality control are described in the documentation PDF.
Inherent optical data collected in Storfjorden (Svalbard) in June 2020 onboard the coast guard vessel KV Svalbard during the Useful Arctic Knowledge project summer school. This data was collected as part of the Nansen Legacy project. Optical data collected includes in situ measurements of absorption and attenuation, accompanied by in situ profiles of salinity, temperature, pressure (CTD) and dissolved organic matter fluorescence (3-channel fluorometer).
Water samples were collected for measurements of dissolved (colored dissolved organic matter, CDOM) absorption, and material was collected on filters for determination of particulate absorption by phytoplankton and non-algal particles, and the stable oxygen isotopic composition of seawater.
The data is available in netcdf files or individual CSV files.
Absorption_Cruise_UAK2020.nc: contains the measurements of CDOM and particulate absorption from water samples. In_Situ_Absorption_Attenution_Cruise_UAK2020: contains the in situ measurements of spectral absorption and attenuation
The CSV files in this collection include the spectral measurements of optical properties as follows:
icam_aphy.csv: Phytoplankton absorption coefficient (in 1/m) as measured with the QFT-ICAM technique
icam_anap.csv: Non-algal particle absorption coefficient (in 1/m) as measured with the QFT-ICAM technique
Perkin_ap.csv: Total particle absorption coefficient (1/m) as measured with the QFT_Perkin technique
O18.csv: Oxygen isotope ratio (δ18O, in ‰ against VSMOW)
acs_fdom_ctd: High vertical resolution in situ cast data: total non-water absorption (1/m) and attenuation (1/m), Fluorescence by Dissolved Organic Matter (FDOM, raw digital signal counts), water salinity (practical salinity scale) and temperature (degrees Celsius).
FDOM was measured at three excitation/emission pairs as follows: Channel 1 (Ch1, 310/450 nm) that represents marine ultraviolet humic-like and marine humic-like material; for Channel 2 (Ch2, 280/450 nm) represents terrestrial humic-like material; and for Channel 3 (Ch3, 280/350 nm) represents protein-like tryptophane type material.
The details of the data processing are described in the published paper (see link below).
The data set presents results of 27 snow and ice thickness surveys along walked transects from five Nansen Legacy cruises conducted during 2018-2022 with the Norwegian ice-going research vessel Kronprins Haakon (KPH) to the northern Barents Sea, area north of Svalbard and further into the central Arctic, namely Nansen and Amundsen basins. Data on snow thickness along the track were collected with a SnowHydro LLC Magnaprobe (MP), a semiautomated GPS snow probe. Total (ice and snow thickness) were measured with a Geonics EM31 or Geophex GEM2 multifrequency electromagnetic sounder (GEM2). For accurate positioning various GPS receivers were used. These were used to calculate along the track sea ice thickness variability. The data are representative of local ice and snow thickness variations in the area of sea ice stations.
Detailed overview of the dataset structure and content is found in the attached metadata file “NL_seaice_transects_dataset_metadata_ver1.0.pdf”
Sea ice salinity and temperature mesured on ice cores collected on the Nansen Legacy seasonal cruises in the Barents Sea and Nansen Basin. The sea ice cores were collected on seven Nansen Legacy research cruises (Q1, Q2, Q3, Q4, JC1-2, JC2-1, JC3) onboard RV Kronprins Haakon between February and December in 2018-2022.
Quality
Data of salinity and temperature measured on sea ice cores collected on seven Nansen Legacy research cruises (Q1, Q2, Q3, Q4, JC1-2, JC2-1, JC3) onboard RV Kronprins Haakon between February and December in 2018-2022, covering seasonal data in the Barents Sea and Nansen Basin. The ice stations followed Nansen Legacy standard stations (P, M, NLEG, PICE, SICE) on a south-north (76N-83N) repeated transect. Method: Sea ice cores were collected using a Kovacs corer (Ø=9cm) and ice temperature (WVR temperature sensor) was meaured at every 5 cm of the core. The core was cut into 10 cm pieces, melted and salinity (WTW 3310 conductivity sensor) was measured in the lab onboard. Different cores were used in this data set; “chem core” is the main core, “alkalinity core” is extra core and “NaN” is mostly due to collection by the sea ice physics team.
M2 acoustic presence of marine mammals and anthropogenic noise manually counted for the period 2019-2020
Quality
Daily acoustic presence of the different sound sources (marine mammals, vessels and airguns) manually identified (except blue and fin whale, automatically detected using spectrogram correlation in Ishmael) during the manual inspection of spectrograms from each acoustic file (one file per hour) for the available data period 2019/2020 in M2, Svalbard. The M2 AURAL recorder sampled 12 min each hour during the given data period.
Variables: dt: date Month: Categorical variable with the name of the month Week: number of week since beginning of the study period Bowhead: acoustic presence of Balaena mysticetus Bowsong: acoustic presence of Balaena mysticetus songs Narwhal: acoustic presence of Monodon monoceros Narwhistle: acoustic presence of Monodon monoceros tonal sounds Walrus: acoustic presence of Odobenus rosmarus Bearded: acoustic presence of Erignathus barbatus Vessel: acoustic presence of vessel noise Odontocete: acoustic presence of odontocete-like whistle and tonal sounds non idetinfied to spp. level Airgun: acoustic presence of airgun blasts Harp: acoustic presence of Pagophilus groenlandicus Humpback: acoustic presence of Megaptera novaeangliae Blue: acoustic presence of Balaenoptera musculus Fin: acoustic presence of Balaenoptera physalus
The data set contains daily sea ice concentrations for each of the 42 Nansen Legacy stations for the period 2017-2021 derived from AMSR-2 and AMSR-E sea ice concentrations products. The data set is complemented with local sea ice concentration from visual bridge-based observations of the state of sea ice pack conducted following ASSIST Ice Watch protocol during some of the Nansen Legacy cruises to the study area.
This is a contribution to the Research Council of Norway project “Nansen Legacy” (https://arvenetternansen.com/), WP RF-1 “Physical drivers”.
Quality
For details on the data product see the attached file NL_stations_ice_concentration_2017-2021_metadata.pdf
Root Mean Squared (RMS) Sound Pressure Levels (SPL) were calculated for the one-Third Octave Level (TOL) bands centered at 63 Hz, 125 Hz and 250 Hz; and for the broadband 50-1000 Hz using PAMGuide package (Merchant et al. 2015) and custom-made MATLAB code. One RMS SPL value per file was obtained, averaging 12 min of recording in M2.
Variables: time: datetime TOL63HZ: Sound Pressure Level for the third-octave level band centered at 63 Hz TOL125HZ: Sound Pressure Level for the third-octave level band centered at 125 Hz TOL250HZ: Sound Pressure Level for the third-octave level band centered at 250 Hz BB501000: Sound Pressure Level for the broadband 50-1000 Hz