Oceans Melting Greenland
Log In
Home → Data → CTD

Conductivity, Temperature, and Depth (CTD) data from the OMG Mission


The OMG mission has released preliminary CTD data collected from Greenland's coastline in September and October 2016 during the AXCTD probe campaign along with CTD data collected from Greenland's coastline in July, August and September 2015 as well as September and October of 2016 during the TerraSond Bathymetry surveys. Although this data will not likely be updated, the project plans to combine this data with additional CTD data in order to generate higher-level products. If you discover any anomalies or inconsistencies with the data or documentation, please let us know by contacting the Principle Investigator for the mission.
Information
DOI10.5067/OMGEV-AXCTD
Short NameOMG_Ocean_CTD
Long NameOMG Ocean CTD Data
DescriptionGlobal sea level rise will be one of the major environmental challenges of the 21st Century. Oceans Melting Greenland (OMG) will pave the way for improved estimates of sea level rise by addressing the question: To what extent are the oceans melting Greenland’s ice from below? Over a five-year campaign, OMG will observe changing water temperatures on the continental shelf surrounding Greenland, and how marine glaciers react to the presence of warm, salty Atlantic Water. The complicated geometry of the sea floor steers currents on the shelf and often determines whether Atlantic Water can reach into the long narrow fjords and interact with the coastal glaciers. Because knowledge of these pathways is a critical component of modeling the interaction between the oceans and ice sheet, OMG will facilitate improved measurements of the shape and depth of the sea floor in key regions as well.

Temperature and salinity data are collected primarily using air-deployed sensors called Airborne eXpendable Conductivity Temperature Depth (AXCTD) instruments. These expendable instruments are launched from an aircraft, fall under a small parachute and float on the surface after impact. The floating portion then release a probe, which sinks to a depth of up to 1000 meters. The probe is connected to the float by a thin wire which unspools at the probe sinks, measuring temperature and conductivity as a function of time. This information is sent by radio to the aircraft, where it is used to compute temperature and salinity as a function of depth. In addition, during the ship survey more traditional lowered CTD data was collected. These instruments measure temperature and conductivity as a function of pressure and the data is downloaded and stored when the instrument returns is taken out of the water.
Version0.1
Measurement Oceans > Bathymetry/Seafloor Topography > Water Depth
Oceans > Ocean Temperature > Water Temperature
Oceans > Salinity/Density > Conductivity
Oceans > Salinity/Density > Salinity
Platform/Sensor
Grumman Gulfstream III (G-III)Airborne eXpendable Conductivity Temperature Depth (AXCTD)
M/V Cape Race vessel operated by TerraSond LimitedAML Oceanographic Minos X CTD
Teledyne Oceanscience Underway CTD
M/V Neptune vessel operated by TerraSond LimitedAML Oceanographic Minos X CTD
Valeport Rapid CTD
ProjectOceans Melting Greenland (OMG)
Data Access
PortalOMG Ocean AXCTD Level 1 Profiles
OMG Ocean AML CTD Level 0 Raw Data
OMG Ocean Teledyne CTD Level 0 Raw Data
OMG Ocean Valeport CTD Level 0 Raw Data
FormatASCII EDF
ASCII CSV
Citation
CitationOMG Mission. 2016. Conductivity, Temperature and Depth (CTD) data from the ocean survey. Ver. 0.1. OMG SDS, CA, USA. Dataset accessed [YYYY-MM-DD] at http://dx.doi.org/10.5067/OMGEV-AXCTD.