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Atlantic Meridional Transect (AMT) CTD and underway data

AMT4 cruise track
AMT4 cruise track ©

The Conductivity, Temperature, Depth (CTD) profiles, and continuous meteorological and oceanographic core measurements (underway data) from all cruises for the Atlantic Meridional Transect (AMT) programme are available online in a fixed ASCII (CSV) format as specified below.

The data are freely available to AMT participants and to the wider scientific community for the purposes of research.

The files available online reflect the current status of data processing at BODC. The data and associated documentation (providing information about sensors, quality control, calibrations and processing status) can be downloaded directly from our web site.

Each time modifications are made by BODC, these files are updated and changes are noted in the documentation and the 'date modified' will be changed.

The AMT community will be notified by email but external users will need to periodically check the tables below to ensure that they have the most up-to-date version of the data.

To download AMT data, you are required to be a registered BODC web user. If you have already registered, please log in, alternatively please register to become a new user.

Data specification and status

CTD data

Specification

  • One ASCII file per cast
  • All parameters included (parameter codes defined in a separate file)
  • Quality-control flags applied where data are null, suspect or interpolated
  • Data converted to standard BODC units
  • Data calibrated against sample data where applicable
  • Data listed in 1 decibar bins

Status

Note — Hover over the additional parameters for an explanation of their meaning.
Cruise Date Casts   Additional  
  parameters 
View
document
AMT17 Oct-Nov 2005 60 Second salinity channel Second temperature channel Calibrated fluorometer output as chlorophyll concentration Dissolved oxygen
AMT19 Oct-Nov 2009 120 Second salinity channel Second temperature channel Calibrated fluorometer output as chlorophyll concentration Downwelling irradiance from lightmeter output Attenuation coefficient from transmissometer output Dissolved oxygen

Underway data

Specification

  • Data merged to a common sampling interval of 60 seconds
  • Quality-control flags applied where data are null or suspect
  • Data converted to standard BODC units
  • Data calibrated against sample data where applicable

Status

Cruise Date/Time Comments View document
Atlantic Meridional Transect