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Institutions: Norwegian Meteorological Institute / Arctic Data Centre, Norwegian Meteorological Institute / Arctic Data Centre, IOPAN Instytut Oceanologii, Polska Akademia Nauk
Last metadata update: 2023-09-06T08:18:42Z
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Abstract:
IO PAS CTD data file from Arctic Cruise with R/V Oceania performed in summer 2008
Institutions: Norwegian Meteorological Institute / Arctic Data Centre, Norwegian Meteorological Institute / Arctic Data Centre, IOPAN Instytut Oceanologii, Polska Akademia Nauk
Last metadata update: 2023-07-13T12:03:35Z
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Abstract:
IO PAS CTD data file from Arctic Cruise with R/V Oceania performed in summer 2007
Conductivity-Temperature-Depth (CTD) profiles from Norwegian Polar Institute (NPI) cruise FS2015 to the Fram Strait including auxiliary sensors. Fram Strait cruises are repeated annually, and a new data set is published for each cruise.
Please refer to the FS2015 cruise report for full information. Profiles were collected with a SBE911+ CTD system deployed over the side of research vessel Lance. Temperature profiles were measured using dual SBE 03 temperature sensors. Conductivity profiles were measured using dual SBE 04 conductivity sensors. Salinity profiles were calculated from temperature and salinity profiles. CDOM was measured using a WETLabs CDOM fluorometer (single sensor).
Profile data is from down casts only and made available in 1 decibar bins. Spurious data collected during the surface soak were removed before binning.
Data are made available as a single, self-documented netCDF file. Profile data are organised in tables with one column per cast and one row per depth bin. 1-dimensional metadata (such as time and position) are organised as a single row with one column per cast. All variables have the same number of columns, equal to the total number of CTD casts.
CTD data collected off the coast of Dronning Maud Land, Antarctica during the Troll Transect Cruise 2020-2021. This dataset contains pressure-gridded (1 dbar) CTD data (temperature, conductivity, salinity, chlorophyll, uncalibrated oxygen) from 14 profiles collected between 28.12.2020 and 07.01.2021. Data were collected using an SBE911+ unit (other CTD data were collected during the cruise - they are not included here).
Stations from 010_01 constitute a meridional (offshore) transect along approximately 6.1°E.
Data from an SBE 43 oxygen sensor are included (both as dissolved oxygen and raw sensor voltage) - please note that these data have not been calibrated or quality-controlled, and are provided as-is.
CTD Chlorophyll data were calibrated based on a linear fit of CTD fluorometer against bottle fluorescence measurements:
- First, the median value of dark counts at depth was determined based on measurements from 100 to 500 m depth.
- A visual inspection confirmed that there were no offsets between profiles.
- To calibrate the bottle Chl-a data to the bottle fluorescence measurements, we first only considered the bottle Chl-a value when the standard deviation of the bottle value divided by the fluorescence measurement was < 0.15, to avoid highly noisy parts of the fluorescence profile. Then we subtracted the offset value (1.0495) from the bottle fluorescence measurement, then we fit a linear regression with the bottle Chl-a measurement.
Salinity values have been compared with salinometer measurements from bottle samples from >1000 dbar (n=16). The average offset (CTD minus salinometer) was -0.0038. This was considered within the total margin of error, except for one notable outlier at station sta010_01, where a salinity difference of -0.0164 was found. Removing this offset from the profile brings the bottom temperature-salinity properties closer to the deep water masses further offshore along the same transect. Sta010_01 was also the first profile taken after the unloading operations, during which the CTD package was unsupervised inside a shipping container for several days, where e.g. accretion of salt crystals in the conductivity cell may have led to a time-depended bias when measurements were resumed. However, at this point, we cannot conclude whether the difference at this station is related to a sensor offset or an inaccurate salinometer sample, and no correction was applied to any of the profiles in this file, and with a greater uncertainty to be accounted for at sta010_01.
Conductivity-Temperature-Depth (CTD) profiles from Norwegian Polar Institute (NPI) cruise FS2018 to the Fram Strait including auxiliary sensors. Fram Strait cruises are repeated annually, and a new data set is published for each cruise.
Please refer to the FS2018 cruise report for full information. Profiles were collected with a SBE911+ CTD system deployed from research vessel Kronprins Haakon. Where the CTD was deployed through a moon pool, spurious data collected from within the moonpool shaft have been removed resulting in a lack of data in the upper 10 m. Temperature profiles were measured using dual SBE 03 temperature sensors. Conductivity profiles were measured using dual SBE 04 conductivity sensors. Salinity profiles were calculated from temperature and salinity profiles. CDOM was measured using a WETLabs CDOM fluorometer (single sensor)
Profile data is from down casts only and made available in 1 decibar bins. Spurious data collected during the surface soak were removed before binning.
Data are made available as a single, self-documented netCDF file. Profile data are organised in tables with one column per cast and one row per depth bin. 1-dimensional metadata (such as time and position) are organised as a single row with one column per cast. All variables have the same number of columns, equal to the total number of CTD casts.
CTD data collected during Conflux project cruise in the Barents Sea June 2011. Mostly profiles from 24-hr stations but also along a North-South transect.
Two oceanographic moorings were deployed by the Norwegian Polar Institute on the continental slope off Dronning Maud Land, East Antarctica, in March 2019 and recovered in December 2020 and January 2021. The data consist of temperature, salinity, oxygen, pressure, and velocity observations from Sea-Bird SBE37 MicroCATs, Sea-Bird SBE56 thermistors, Teledyne 150kHz and 300kHz ADCPs, Nortek Aquadopp current meters, and RBR Concerto CTDs.
The raw data have been processed and quality controlled. All velocities have been corrected for magnetic declination. Data are provided at the original sampling rate (which varies from 5 minutes to 2 hours).
Conductivity-Temperature-Depth (CTD) profiles from Norwegian Polar Institute (NPI) cruise FS2021 to the Fram Strait including auxiliary sensors. Fram Strait cruises are repeated annually, and a new data set is published for each cruise.
Please refer to the FS2021 cruise report for full information. Profiles were collected with a SBE911+ CTD system deployed from research vessel Kronprins Haakon. Where the CTD was deployed through a moon pool, spurious data collected from within the moonpool shaft have been removed resulting in a lack of data in the upper 10 m. Temperature profiles were measured using dual SBE 03 temperature sensors. Conductivity profiles were measured using dual SBE 04 conductivity sensors. Salinity profiles were calculated from temperature and salinity profiles. CDOM was measured using a WETLabs CDOM fluorometer (single sensor).
Profile data is from down casts only and made available in 1 decibar bins. Spurious data collected during the surface soak were removed before binning.
Data are made available as a single, self-documented netCDF file. Profile data are organised in tables with one column per cast and one row per depth bin. 1-dimensional metadata (such as time and position) are organised as a single row with one column per cast. All variables have the same number of columns, equal to the total number of CTD casts.
Conductivity-Temperature-Depth (CTD) profiles from Norwegian Polar Institute (NPI) cruise FS2017 to the Fram Strait including auxiliary sensors. Fram Strait cruises are repeated annually, and a new data set is published for each cruise.
Please refer to the FS2017 cruise report for full information. Profiles were collected with a SBE911+ CTD system deployed over the side of research vessel Lance. Temperature profiles were measured using dual SBE 03 temperature sensors. Conductivity profiles were measured using dual SBE 04 conductivity sensors. Salinity profiles were calculated from temperature and salinity profiles. CDOM was measured using a WETLabs CDOM fluorometer (single sensor).
Profile data is from down casts only and made available in 1 decibar bins. Spurious data collected during the surface soak were removed before binning.
Data are made available as a single, self-documented netCDF file. Profile data are organised in tables with one column per cast and one row per depth bin. 1-dimensional metadata (such as time and position) are organised as a single row with one column per cast. All variables have the same number of columns, equal to the total number of CTD casts.
Conductivity-Temperature-Depth (CTD) profiles with auxiliary sensor data from Norwegian Polar Institute cruise Arctic Ocean 2023 - 2 from north of Svalbard, across the shelf slope, and into the deep Nansen Basin of the Arctic Ocean between 10-29 August 2023. Three stations - 182, 216, and 221 - were part of the A-DBO (https://arcticpassion.eu/adbo/) network. The dataset includes profiles of sensor temperature, conductivity, uncalibrated dissolved oxygen, chlorophyll fluorescence, colored dissolved organic matter (CDOM) fluorescence (voltage only), beam attenuation, and calculated practical salinity (EOS-80). Profile data are from down casts only and available in a 1 decibar vertical resolution (i.e. averaged into 1-decibar bins). Chlorophyll fluorescence was calibrated against sample bottles using linear regression through the origin, excluding values larger than 8 mg/m3 (Figure 1 in summary_CTD_AO-II-2023_CTD.pdf). The salinity was verified against sample bottle salinities (Figure 2 in summary_CTD_AO-II-2023_CTD.pdf). Additionally, parameters for temperature, conductivity, salinity, chlorophyll, and beam attenuation are provided for the sampled bottle depths (named NISKIN_*).
The data are contained in a single, self-documenting netCDF file. Profile data are organized in arrays with one column per cast and one row per pressure bin (BIN_*). Data corresponding to the bottle depths are organized similarly, with one column per cast and one row per Niskin bottle. For stations 179-192 and 215-221 a rosette with 24 bottles was used and for stations 193, 195-214 a rosette with 12 Niskin bottles. For the latter, maximum of 12 topmost rows in the array are filled. 1-dimensional metadata such as time and position are organized in a row-vector with one value per cast. All variables have the same number of columns, equal to the total number of CTD casts. For more information on the sampling routines, please refer to the AO-II-2023 cruise report (https://hdl.handle.net/11250/3114227). The CTD post-cruise processing included the removal of salinity spikes. The primary conductivity sensor was of better quality than the secondary sensor and data from the primary sensors were selected to be included.
Conductivity-Temperature-Depth (CTD) profiles from Norwegian Polar Institute (NPI) cruise FS2014 to the Fram Strait including auxiliary sensors. Fram Strait cruises are repeated annually, and a new data set is published for each cruise. Please refer to the FS2014 cruise report for full information. Profiles were collected with a SBE911+ CTD system deployed over the side of research vessel Lance.
Temperature profiles were measured using dual SBE 03 temperature sensors. Conductivity profiles were measured using dual SBE 04 conductivity sensors. Salinity profiles were calculated from temperature and salinity profiles. CDOM was measured using a WETLabs CDOM fluorometer (single sensor).
Profile data is from down casts only and made available in 1 decibar bins. Spurious data collected during the surface soak were removed before binning.
Data are made available as a single, self-documented netCDF file. Profile data are organised in tables with one column per cast and one row per depth bin. 1-dimensional metadata (such as time and position) are organised as a single row with one column per cast. All variables have the same number of columns, equal to the total number of CTD casts.
Conductivity-Temperature-Depth (CTD) profiles from Norwegian Polar Institute (NPI) cruise FS2016 to the Fram Strait including auxiliary sensors. Fram Strait cruises are repeated annually, and a new data set is published for each cruise.
Please refer to the FS2016 cruise report for full information. Profiles were collected with a SBE911+ CTD system deployed over the side of research vessel Lance. Temperature profiles were measured using dual SBE 03 temperature sensors. Conductivity profiles were measured using dual SBE 04 conductivity sensors. Salinity profiles were calculated from temperature and salinity profiles. CDOM was measured using a WETLabs CDOM fluorometer (single sensor).
Profile data is from down casts only and made available in 1 decibar bins. Spurious data collected during the surface soak were removed before binning.
Data are made available as a single, self-documented netCDF file. Profile data are organised in tables with one column per cast and one row per depth bin. 1-dimensional metadata (such as time and position) are organised as a single row with one column per cast. All variables have the same number of columns, equal to the total number of CTD casts.
Conductivity-Temperature-Depth (CTD) profiles from Norwegian Polar Institute (NPI) cruise FS2019 to the Fram Strait including auxiliary sensors. Fram Strait cruises are repeated annually, and a new data set is published for each cruise.
Please refer to the FS2019 cruise report for full information. Profiles were collected with a SBE911+ CTD system deployed from research vessel Kronprins Haakon. Where the CTD was deployed through a moon pool, spurious data collected from within the moonpool shaft have been removed resulting in a lack of data in the upper 10 m. Temperature profiles were measured using dual SBE 03 temperature sensors. Conductivity profiles were measured using dual SBE 04 conductivity sensors. Salinity profiles were calculated from temperature and salinity profiles. CDOM was measured using a WETLabs CDOM fluorometer (single sensor)
Profile data is from down casts only and made available in 1 decibar bins. Spurious data collected during the surface soak were removed before binning.
Data are made available as a single, self-documented netCDF file. Profile data are organised in tables with one column per cast and one row per depth bin. 1-dimensional metadata (such as time and position) are organised as a single row with one column per cast. All variables have the same number of columns, equal to the total number of CTD casts.
Conductivity-Temperature-Depth (CTD) profiles from Norwegian Polar Institute cruise AO-I-2023 to the Fram Strait. The dataset includes profiles of sensor temperature, conductivity, dissolved oxygen, chlorophyll fluorescence, coloured dissolved organic matter fluorescence, beam attenuation, and calculated practical salinity (EOS-80). Profile data are from down casts only and made available in a vertical resolution of 1 decibar (i.e. averaged into 1-decibar bins). The dataset also includes laboratory measurements of salinity and chlorophyll a from Niskin bottle samples. Laboratory results for several core parameters are to be added successively. The data are contained in a single, self-documenting netCDF file. Profile data are organised in arrays with one column per cast and one row per depth bin (pressure bin). Bottle data are organised in arrays with one column per cast and one row per Niskin bottle. One-dimensional metadata (such as time and position) are organised as a single row with one column per cast. Two-dimensional metadata (such as sample number) relate to Niskin bottle data and are organised in arrays with one column per cast and one row per Niskin bottle. All variables have the same number of columns, equal to the total number of CTD casts. For full information on the sampling and processing routines, please refer to the AO-I-2023 cruise report (https://hdl.handle.net/11250/3089166) and the CTD post-cruise processing report (included as file here).