24.5N transatlantic hydrographic section A05, 2004-present

Data set information

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Data holding centreBritish Oceanographic Data Centre
CountryUnited Kingdom  United Kingdom
Time periodApril 2004 onwards
Geographical area

Transatlantic section at 24.5N from Florida to Portugal, North Africa, or the Canary Islands


Alkalinity, acidity and pH of the water column; Vertical velocity of the water column (currents); Bathymetry and Elevation; Total dissolved inorganic carbon (TCO2) concentration in the water column; Salinity of the water column; Temperature of the water column; Metadata parameters; Chlorophyll pigment concentrations in water bodies; Dissolved oxygen parameters in the water column; Electrical conductivity of the water column; Transmittance and attenuance of the water column; Air temperature; Density of the water column; Raw light meter output; Wind strength and direction; Horizontal velocity of the water column (currents)


Fluorometers; current profilers; thermosalinographs; multi-beam echosounders; CTD; discrete water samplers; current meters; meteorological packages


This dataset contains hydrographic profiles (temperature, salinity, oxygen, fluorometer, transmissometer, irradiance) and along track measurements (bathymetry, surface meteorology, sea surface hydrography), with discrete measurements including water chemistry (organic and inorganic nutrients, particulate organic carbon and nitrogen, dissolved gases, trace metals) collected from a hydrographic section in the North Atlantic Ocean. This hydrographic section, designated A05 by the World Ocean Circulation Experiment (WOCE), runs along a nominal latitude of 24.5N between Florida and either Spain, North Africa, Portugal or the Canary Islands. Four UK cruises (D279, D346, DY040 and JC191) have contributed to this dataset to date using CTD casts, vessel-mounted and lowered ADCPs, bottle sampling and meteorological measuring systems to collect data. The measurements were collected as one of the UK's contributions to the Global Ocean Ship-based Hydrographic Investigations Program (GO-SHIP) and with the aim of contributing to the study of decadal variability of the present ocean circulation and meridional transport of heat, freshwater and biogeochemistry, as part of the Climate Linked Atlantic Sector Science (CLASS) project. The work was led by teams from the National Oceanography Centre at Southampton. Data from the section are held at the British Oceanographic Data Centre (BODC).

OriginatorsNational Oceanography Centre (Southampton)
OrganisationBritish Oceanographic Data Centre
ContactPolly Hadžiabdić (Head of the BODC Requests Team)

British Oceanographic Data Centre
Joseph Proudman Building 6 Brownlow Street
L3 5DA
United Kingdom

Telephone+44 (0)782 512 0946
Collating centreBritish Oceanographic Data Centre
Local identifier1048_24NA05
Global identifier7116
Last revised2021-07-08