Gary, Stefan F (2017): Full depth ocean properties in the eastern subpolar North Atlantic, Cruise DY052, Extended Ellett Line, 2016, link to raw data in NetCDF format [dataset]. Scottish Association for marine Science, Argyll, PANGAEA, https://doi.org/10.1594/PANGAEA.881182
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Abstract:
The Extended Ellett Line is a hydrographic section between Iceland and Scotland that is occupied annually by scientists from the National Oceanography Centre (NOC) and the Scottish Association for Marine Science (SAMS), UK.
The measurement programme began as a seasonally-occupied hydrographic section in the Rockall Trough in 1975, building on early surface observations made underway from ocean weather ships.
In 1996 the section was extended to Iceland, sampling three basins: the Rockall Trough, the Hatton-Rockall Basin and the Iceland Basin. These three basins form the main routes though which warm saline Atlantic water flows northwards into the Nordic Seas and Arctic Ocean. The section crosses the eastern North Atlantic subpolar gyre; as well as the net northward flow there is a large recirculation of the upper layers as part of the wind-driven gyre.
During its passage through the region, the warm saline water is subjected to significant modification by exchange of heat and freshwater with the atmosphere. The two deep basins (Rockall Trough and Iceland Basin) contain southward flowing dense northern overflow waters, and Labrador Sea Water in the intermediate layers.
The specific objectives of the 2016 Extended Ellett Line cruise are:
- To complete the annual Extended Ellett Line CTD section;
- To collect water samples for measuring biogeochemical properties including dissolved oxygen, nutrients, carbon & trace metals;
- To collect underway measurements of surface currents, surface temperature and salinity, bathymetry, surface meteorology;
- To complete epibenthic sled tows at a deep location in the central Rockall Trough;
- To capture water column and sea floor video with a downward-looking camera attached to the CTD;
- To listen for whales and dolphins with a towed hydrophone; and
- To deploy Argo floats provided by the UK Met Office as a contribution to the International Argo Project.
Related to:
Holliday, Naomi Penny; Cunningham, Stuart A; Johnson, Clare; Gary, Stefan F; Griffiths, Colin; Read, Jane F; Sherwin, Toby (2015): Multidecadal variability of potential temperature, salinity, and transport in the eastern subpolar North Atlantic. Journal of Geophysical Research: Oceans, 120(9), 5945-5967, https://doi.org/10.1002/2015JC010762
Project(s):
Funding:
Horizon 2020 (H2020), grant/award no. 678760: A Trans-Atlantic assessment and deep-water ecosystem-based spatial management plan for Europe
Coverage:
Median Latitude: 56.257700 * Median Longitude: -5.529700 * South-bound Latitude: 55.846800 * West-bound Longitude: -6.149600 * North-bound Latitude: 56.668600 * East-bound Longitude: -4.909800
Date/Time Start: 2016-06-07T00:00:00 * Date/Time End: 2016-06-24T00:00:00
Event(s):
ATLAS_DY052 * Latitude Start: 55.846800 * Longitude Start: -4.909800 * Latitude End: 56.668600 * Longitude End: -6.149600 * Date/Time Start: 2016-06-07T00:00:00 * Date/Time End: 2016-06-24T00:00:00 * Location: South Atlantic Ocean * Campaign: DY052 * Basis: Discovery (2013) * Method/Device: Underway cruise track measurements (CT)
Comment:
This archive of files is identical to the final data sent to the British Oceanographic Data Centre with extensive metadata available at: https://www.bodc.ac.uk/resources/inventories/cruise_inventory/report/16032/
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
96.1 MBytes