Details of CTD, Disko west cruise 2009
BackDataset identification
© OpenStreetMap contributors
Title of dataset | CTD, Disko west cruise 2009 |
Narrative summary of dataset | In September 2009, a ship-based study was carried out in the Davis Strait/southern Baffin Bay along a range of transects covering the area between the west coast of Greenland and Baffin Island (Canada) from 68-72º N . Water temperature, salinity and in situ chlorophyll a (chl. a) measured in 0-500 m depths followed the general hydrographical characteristics of the late summer situation. Surface chl. a concentration based on remote sensing satellite data from September 2009 supported these findings. Measurement of in situ chl. a concentrations revealed a maximum in the subsurface (30-50 m water depths). Thus, spatial distribution of the phytoplankton bloom was often restricted to subsurface rather than the surface waters and therefore not detected by the remote sensing during September. |
Project/programme | Vertical and horizontal distribution of zooplankton and polar cod in southern Baffin Bay (66–71degrees N) in September 2009 |
Start date | 2009-09-07 |
End date | 2009-09-22 |
Responsible organisations
Country | Denmark |
Organisation name | Aarhus University,Danish Centre for Environment and Energy |
Role of organisation | Originator of Dataset |
Dataset availability
Original dataset download link | https://cloud.emodnet-ingestion.eu/index.php/s/ZFcv057v553nJ0t |
Dataset format | Delimited |
Text or Plaintext | |
Public access | No limitations |
License for use | ODC-By |
Type | Dataset |
Locations
Map | © OpenStreetMap contributors |
Latitude north boundary | 71 |
Longitude east boundary | -50.458813491341 |
Latitude south boundary | 66.3 |
Longitude west boundary | -70.849438491341 |
Coordinate reference system | World Geodetic System 84 |
Sea area | Arctic Ocean |
Baffin Bay | |
Davis Strait |
Data types, collection and processing
Observation type | Other physical oceanographic measurements |
Water column temperature and salinity | |
Parameter | Variable fluorescence parameters |
Chlorophyll pigment concentrations in water bodies | |
Salinity of the water column | |
Temperature of the water column | |
Instrument type | fluorometers |
Instrument name | Seapoint chlorophyll fluorometer |
Instrument type | CTD |
Instrument name | Sea-Bird SBE 911plus CTD |
Platform type | research vessel |
Platform name | Bjarni Saemundsson |
Data quality processing information | On the basis of the CTD stations, five transects cutting across the main bathymetrical and hydrographical structures of the study area were defined (Fig. 1) and interpolated for salinity, temperature, and fluorescence, respectively (Fig. 2). Transects 1-4 cut across the entire study area, starting in CSW, moving through DB, and ending in GSW. Transect 5 is located mainly in GSW, with only one station in DB (Fig. 1). All transects were characterized by relatively warm water (2.2 °C) in the upper water column (0-50 m) (Fig. 2a, d, g, j, m). In CSW, the intermediate water body (50-250 m) consisted of relatively cold water (-1.4 °C), which stretched out eastwards into the upper part of the intermediate water body in DB. In GSW, the intermediate water body was relatively warm (2.3 °C). The deeper part of the water body (250–500 m) was relatively warm in all three areas (2.1 °C) with a gradual increase in temperature from CSW toward GSW. On all transects, the salinity ranged from 30.5 to 34.5, increasing with depth. The salinity was in general lowest in the surface waters (0–50 m) of the CSW and highest at depth (300–500 m) in the GSW (Fig. 2b, e, h, k, n), the latter as a result of the inflow of warm Atlantic water. At any particular depth, salinity always increased toward east. Fluorescent material was only found in the upper 50 m of the water column with slightly higher values in CSW and GSW(0.9) than inDB(0.6) (Fig. 2c, f, i, l, o). St. 1 located on the shallow St. Hellefiskebanke (GSW), which is renowned for its primary production, had the highest fluorescence levels recorded in the study area. However, if st. 1 is excluded, there were significantly higher levels of fluorescent material in CSW than in GSW (p[0.0001, t test). |
Process information
Submitting organisation | Aarhus University, Department of Bioscience, Marine Ecology Roskilde |
Submission identifier (UUID) | 267aaf37-c3a8-406a-8492-761953fb13dd |
Date of dataset creation | 2009-09-22 |
Date of metadata creation | 2019-03-26 |
Date of metadata latest revision | 2019-05-22 |
Date of publishing | 2019-05-24 |
Processing data centre | Aarhus University, Department of Bioscience, Marine Ecology Roskilde |
Summary record-ID | 515 |