A full-depth transatlantic hydrographic section at latitude 36 N

Particulate inorganic carbon concentrations in the water column; Electrical conductivity of the water column; Particulate total and organic carbon concentrations in the water column; Chlorophyll pigment concentrations in water bodies; Dissolved organic carbon concentration in the water column; Dissolved oxygen parameters in the water column; Vertical velocity of the water column (currents); Salinity of the water column; Horizontal velocity of the water column (currents); Concentration of inorganic halogens in the atmosphere; Transmittance and attenuance of the water column; Bathymetry and Elevation; Temperature of the water column

Meteorological packages; single-beam echosounders; discrete water samplers; continuous water samplers; CTD; current profilers; discrete air samplers

The dataset includes full-depth hydrographic profiles and current data collected by acoustic Doppler current profilers (ADCPs). Water samples were collected and analysed for salinity, inorganic nutrients (nitrogen, phosphorus, silicon), organic nitrogen and phosphorus components, dissolved organic carbon and alkalinity. Measurements of chlorofluorocarbons (CFCs), sulphur hexafluoride (SF6) and helium/tritium tracers were also collected to identify ages of water masses. These core observations were supplemented by measurements made by tied PhD students: measurements of Dissolved Organic Nitrogen (DON) and Dissolved Organic Phosphorus (DOP); isotopic nitrogen signatures; atmospheric deposition of nitrogen and phosphorus; measurements of dissolved organic carbon and dissolved oxygen; and plankton respiration rates. These measurements were taken on the RRS Charles Darwin across the North Atlantic, departing from Bermuda on 1 May 2005 and arriving in Lisbon on 15 June 2005. Data were collected via a number of conductivity-temperature-depth (CTD) casts and continuous underway measurements. The study aimed to examine why ocean temperatures are rising within the tropics and mid-latitudes of the North Atlantic but decreasing at high latitudes. Investigators: National Oceanography Centre, Southampton (NOCS): Elaine McDonagh, Brian King, Harry Bryden, Richard Sanders, Paula Mcleod . University of Liverpool: Ric Williams, George Wolff, Rhiannon Mather, Susan Leadbetter. University of East Anglia: Carol Robinson, Andy Watson, Tim Jickells, Ute Schuster. Proudman Oceanography Laboratory: Clare Postlethwaite.

36 North Project (2008) Project web site: http://www.bodc.ac.uk/36n/, 36 North Project

British Oceanographic Data Centre
Joseph Proudman Building 6 Brownlow Street
Liverpool
Merseyside
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United Kingdom