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


The OMG mission has released final CTD data via the Physical Oceanography DAAC (PO.DAAC). Preliminary CTD data has also been archived at PO.DAAC and is available upon request.
Information
DOI/Short Name
10.5067/OMGEV-AXBT1OMG_L2_AXBT
10.5067/OMGEV-AXCT1OMG_L2_AXCTD
10.5067/OMGEV-CTDS1OMG_L2_CTD
10.5067/OMGEV-ALMO1OMG_L1_FLOAT_ALAMO
10.5067/OMGEV-APFX1OMG_L1_FLOAT_APEX
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 is taken out of the water.
Version1
Measurement Oceans > Bathymetry/Seafloor Topography > Water Depth
Oceans > Ocean Temperature > Water Temperature
Oceans > Salinity/Density > Conductivity
Oceans > Salinity/Density > Salinity
Campaigns
2015A campaign was conducted by Terrasond Limited aboard the M/V Cape Race vessel. The data was collected during a survey of Greenland's Western coastline in July through September 2015 using the AML Oceanographic Minos X CTD and the Teledyne Oceanscience Underway CTD instruments. See the field report for more information.

A campaign was conducted by Ocean Research Project aboard the R/V Ault vessel. The data was collected during a survey of Greenland’s Western coastline in August and September 2015 using the RBRconcerto CTD instrument. See the field report for more information.
2016A campaign was conducted by Ocean Research Project aboard the R/V Ault vessel. The data was collected during a survey of Greenland’s Northwestern coastline in July and August 2016 using the RBRconcerto CTD instrument. See the field report for more information.

A campaign was conducted by Access Arctic / University of California Irvine (UCI) aboard the S/Y Ivilia vessel. The data was collected during a survey of Greenland’s Western coastline in September 2016 using the AML Oceanographic Minos X CTD instrument.

A campaign was conducted by Terrasond Limited aboard the M/V Neptune vessel. The data was collected during a survey of Greenland's Southeastern coastline in September and October 2016 using the AML Oceanographic Minos X CTD and the Valeport Rapid CTD instruments. See the field report for more information.

A campaign was conducted by the OMG Science Team aboard the Grumman Gulfstream III (G-III) aircraft. The data was collected during a survey of Greenland's coastline in September and October 2016 using AXCTD instruments. See the field report for more information.
2017A campaign was conducted by Access Arctic / University of California Irvine (UCI) aboard the S/Y Ivilia vessel. The data was collected during a survey of Greenland’s Western coastline in August 2017 using the AML Oceanographic Minos X CTD instrument. See the field report for more information.

A campaign was conducted by the OMG Science Team aboard the C-130 Hercules aircraft. The data was collected during a survey of Greenland's coastline in October 2017 using AXCTD instruments. See the field report for more information.
2018A campaign was conducted by Ocean Research Project aboard the S/V Toboggan vessel. The data was collected during a survey of Greenland’s Northwestern coastline in July 2018 using the RBRconcerto CTD instrument.

A campaign was conducted by Access Arctic / University of California Irvine (UCI) aboard the S/Y Ivilia vessel. The data was collected during a survey of Greenland’s Southeastern coastline in August 2018 using the AML Oceanographic Minos X CTD instrument.

A campaign was conducted by the OMG Science Team aboard the Basler BT-67 aircraft. The data was collected during a survey of Greenland's coastline in August and September 2018 using AXCTD instruments. See the field report for more information.
2019A campaign was conducted by Access Arctic / University of California Irvine (UCI) aboard the M/V Arii Moana vessel. The data was collected during a survey of Greenland’s Northwestern coastline in August 2019 using the AML Oceanographic Minos X CTD instrument.

A campaign was conducted by the OMG Science Team aboard the Basler BT-67 aircraft. The data was collected during a survey of Greenland's coastline in August and September 2019 using AXCTD instruments. See the field report for more information.
2020A campaign was conducted by Access Arctic / University of California Irvine (UCI) aboard the M/V Arii Moana vessel. The data was collected during a survey of Greenland’s Southwestern coastline in March and April 2020 using the AML Oceanographic Minos X CTD instrument.

Another campaign was conducted by Access Arctic / University of California Irvine (UCI) aboard the M/V Wave vessel. The data was collected during a survey of Greenland’s Northeastern coastline in August 2020 using the AML Oceanographic Minos X CTD instrument.

A campaign was conducted by the OMG Science Team aboard the Basler BT-67 aircraft. The data was collected during a survey of Greenland's coastline in August and September 2020 using AXBT and AXCTD instruments. See the field report for more information.
2021A campaign was conducted by the OMG Science Team aboard the Basler BT-67 aircraft. The data was collected during a survey of Greenland's coastline in August and September 2021 using AXBT and AXCTD instruments. See the field report for more information.
2017-2021The OMG Science Team deployed Alamo floats along the coast of Greenland. This data was collected from August 2017 to October 2021.
2020-2021The OMG Science Team deployed APEX floats along the coast of Greenland. This data was collected from August 2020 to October 2021.
ProjectOceans Melting Greenland (OMG)
Data Access
Portal These files provide a map-based view of the CTD data collection points when loaded into the Google Earth application.
OMG 2015-2018 CTD Data Points
OMG 2019 CTD Data Points
OMG 2020 AXCTD Data Points
OMG 2020 AXBT Data Points
OMG 2021 AXCTD Data Points
OMG 2021 AXBT Data Points

OMG Ocean AXBT Level 2 Data
OMG Ocean AXCTD Level 2 Data
OMG Ocean CTD Level 2 Data
OMG Ocean Alamo CTD Level 1 Data
OMG Ocean APEX CTD Level 1 Data
FormatNetCDF
Citation
All CTD data acquired from the OMG PortalOMG Mission. 2020. Conductivity, Temperature and Depth (CTD) data from the ocean survey. Ver. 0.1. OMG SDS, CA, USA. Dataset accessed [YYYY-MM-DD] at https://dx.doi.org/10.5067/OMGEV-AXCTD.
AXBT data acquired from PO.DAACOMG. 2020. OMG Airborne eXpendable Bathy Thermograph (AXBT) Profiles. Ver. 1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://dx.doi.org/10.5067/OMGEV-AXBT1.
AXCTD data acquired from PO.DAACOMG. 2020. OMG Airborne eXpendable Conductivity Temperature Depth (AXCTD) Profiles. Ver. 1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://dx.doi.org/10.5067/OMGEV-AXCT1.
Ship Survey CTD data acquired from PO.DAACOMG. 2020. OMG Conductivity, Temperature and Depth (CTD) profiles. Ver. 1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://dx.doi.org/10.5067/OMGEV-CTDS1.
Alamo CTD data acquired from PO.DAACOMG. 2020. OMG Conductivity, Temperature and Depth (CTD) profiles. Ver. 1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://dx.doi.org/10.5067/OMGEV-ALMO1.
APEX CTD data acquired from PO.DAACOMG. 2020. OMG Conductivity, Temperature and Depth (CTD) profiles. Ver. 1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://dx.doi.org/10.5067/OMGEV-APFX1.