Maritimes Region Atlantic Zone Off-Shelf Monitoring Program (AZOMP) Rosette Vertical Profiles

The Atlantic Zone Off-Shelf Monitoring Program (AZOMP) collects and analyzes physical, chemical, and biological oceanographic observations from the continental slope and deep basins of the Northwest Atlantic, with the overarching goal of monitoring variability in ocean climate and plankton affecting ecosystems off Atlantic Canada and climate systems at both regional and global scales.

Annual measurements in the Labrador Sea began in 1990 as a contribution to the World Ocean Circulation Experiment (WOCE) and have evolved into a multidisciplinary regional monitoring effort and part of the Global Ocean Ship-based Hydrographic Investigations Program (GO-SHIP).

AZOMP's sampling scheme off Atlantic Canada and the Labrador Sea involves annual sampling of both the Atlantic Repeat 7-West (AR7W) line, a 880 km-line running across the Labrador Sea from Labrador to Greenland coast and extended Halifax Line, deep-water stations over the Scotian Slope and Rise located at the end of AZMP’s Halifax Line. Opportunistic sampling also may occur at stations in the Strait of Belle Ilse, station 27, Labrador Shelf, and OSNAP West line in support of ancillary research programs and initiatives. AZOMP sampling is conducted according to standard Go-Ship protocols ( and includes: 1- the collection of CTD and Lowered-ADCP profiles and water samples for the determination of physical (e.g., T, S, currents), chemical (e.g., nutrients, Carbonate system, transient gases for water mass determination and/or ventilation and carbon sequestration studies), and biological (e.g., chl a, Primary production and optical properties) variables; 2- Stratified multi net tows for zooplankton; and 3- vertical ring net tows for plankton. In addition XBTs and Argo floats are commonly deployed and vessel-mounted ADCP is used to water masses structures at a smaller scale. The data collected are synthesized into annual reports on the physical, chemical and biological changes in Atlantic Canadian waters and the Labrador Sea. One primary focus is on changes in the intensity of winter overturning of surface and intermediate-depth waters resulting in deep water mass formation and is part of the thermohaline circulation that affects the global climate. Convection also transfers atmospheric gases from the surface to intermediate depths, reducing the rate of increase of carbon dioxide in the atmosphere but increasing the acidity of the ocean.

Access and Use

Licence: Open Government Licence 2.0 (Canada)

Data and Resources



Dataset extent

Metadata Reference Date(s) November 16, 2022 (Publication)
July 14, 2023 (Revision)
Data Reference Date(s) January 01, 1998 (Creation)
Frequency of Update As Needed

Responsible Party 1
Environmental Data Section (MEDS), Marine
Fisheries and Oceans Canada
Responsible Party 2
Ringuette, Marc
Fisheries and Oceans Canada
  • Custodian
  • Point of Contact
Responsible Party 3
Data Services, BIO
Fisheries and Oceans Canada

Field Value
Ocean Variables
  • Oxygen
  • Nutrients
  • Inorganic Carbon
  • Transient tracers
  • Particulate matter
  • Dissolved Organic Carbon
  • Sea Surface Salinity
  • Sea Surface Temperature
  • Subsurface Currents
  • Subsurface Salinity
  • Subsurface Temperature
  • Surface Currents
  • Phytoplankton biomass and diversity
  • Zooplankton biomass and diversity
  • Other
  • Ocean colour
Climate Variables
  • Surface Currents
  • Inorganic Carbon
  • Nutrients
  • Oxygen
  • Transient Tracers
Scope Dataset
Status On Going
Maintenance Note Generated from
Spatial Extent [[[-63.7, 37.7], [-48.1, 37.7], [-48.1, 60.6], [-63.7, 60.6], [-63.7, 37.7]]]
North Bounding Latitude 60.6
South Bounding Latitude 37.7
East Bounding Longitude -48.1
West Bounding Longitude -63.7
Temporal Extent
Vertical Extent
Default Locale English
Included in Data Catalogue
Included in Data Catalogue 1