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Description

This dataset contains in situ measurements from Conductivity Temperature Depth (CTD) casts and tows. It provides salinity, density, temperature and sound velocity of the water column. The CTDs were deployed from a ship either as single profile casts or towed yo-yo behind the ship to measure the physical properties of the water. This provided measurements of the ocean's physical characteristics around Greenland. The CTDs are part of the Oceans Melting Greenland (OMG) project. The goal of the project is to find out what contributions the ocean has on Greenland's melting glaciers.

Product Summary

Platforms
InSitu
Instruments
CTD
Spatial Extent

N: 79.841 S: 60.351 E: 53.406 W: -74.576

Location
GREENLAND
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2015-07-25 to 2020-08-23
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC)
Concept ID
C2491772156-POCLOUD
Data State
COMPLETE
Number of Files/Granules
777
Processing Level
2
Published
Updated
Science Keywords
Salinity ,
TEMPERATURE PROFILES ,
Density ,
Conductivity

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

OMG. (2020). OMG CTD Conductivity Temperature Depth [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/OMGEV-CTDS1 Date Accessed: 2026-05-01

Documents

glacier and ocean

Glaciers Melt From Below

Researchers used remote sensing to investigate how subsurface ocean temperature variations have changed glaciers over the past 30 years.
Data in Action
Jan. 20, 2021
SHOWING 1 OF 1

Publications Citing This Dataset

Filters
Title Year Author Topic
Controls on Fjord Temperature Throughout Greenland in a Reduced-Physics Mas e Braga, Martim, Cowton, Tom, Slater, Donald, Inall, Mark, Johnstone, Eleanor, Fraser, Neil Density, TEMPERATURE PROFILES, Salinity, Conductivity, TEMPERATURE PROFILES
Winter subglacial meltwater detected in a Greenland fjord Hansen, Karina, Karlsson, Nanna B., How, Penelope, Poulsen, Ebbe, Mortensen, John, Rysgaard, Sren Salinity, TEMPERATURE PROFILES, Density, Conductivity
Ubiquitous acceleration in Greenland Ice Sheet calving from 1985 to 2022 Greene, Chad A., Gardner, Alex S., Wood, Michael, Cuzzone, Joshua K. Land Ice/Ocean Classification, Glacier Extent, Ice Extent, Glacier Terminus, Salinity, TEMPERATURE PROFILES, Density, Conductivity
Greenland subglacial discharge as a driver of hotspots of increasing coastal chlorophyll since the early 2000s Oliver, Hilde, Slater, Donald, Carroll, Dustin, Wood, Michael, Morlighem, Mathieu, Hopwood, Mark J. Salinity, TEMPERATURE PROFILES, Density, Conductivity
Subglacial-Discharge Plumes Drive Widespread Subsurface Warming in Cowton, T. R., Slater, D. A., Inall, M. E. Salinity, TEMPERATURE PROFILES, Density, Conductivity
Shifts of the Recirculation Pathways in Central Fram Strait Drive McPherson, R. A., Wekerle, C., Kanzow, T. Salinity, TEMPERATURE PROFILES, Density, Conductivity
The contribution of Humboldt Glacier, northern Greenland, to sea-level rise through 2100 constrained by recent observations of speedup and retreat Hillebrand, Trevor R., Hoffman, Matthew J., Perego, Mauro, Price, Stephen F., Howat, Ian M. Ice Velocity, Surface Morphology, Density, TEMPERATURE PROFILES, Salinity, Conductivity, TEMPERATURE PROFILES
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Variables

The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.

For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor Offset
conductivity sea water electrical conductivity mS cm-1 float -9999 0 to 60 1 N/A
density If this field is populated with fill values, the data was not available from the source product. kg m-3 float -9999 999 to 1045 1 N/A
depth The data was derived using the Gibbs-SeaWater (GSW) Oceanographic Toolbox. meters float -9999 0 to 5000 1 N/A
dissolved_oxygen If this field is populated with fill values, the data was not available from the source product. mol m-3 float -9999 N/A 1 N/A
lat latitude degrees_north float -9999 -90 to 90 1 N/A
lon longitude degrees_east float -9999 -180 to 180 1 N/A
pressure If this field is populated with fill values, the data was not available from the source product. dBar float -9999 N/A 1 N/A
profile profile N/A int N/A N/A 1 N/A
salinity If this field is populated with fill values, the data was not available from the source product. 1 float -9999 0 to 45 1 N/A
sea_pressure If this field is populated with fill values, the data was not available from the source product. dBar float -9999 N/A 1 N/A
sound_velocity If this field is populated with fill values, the data was not available from the source product. m s-1 float -9999 1405 to 1560 1 N/A
temperature sea water temperature degrees_C float -9999 -2.2 to 35 1 N/A
time time seconds since 1970-01-01T00:00:00Z double -9999 N/A 1 N/A
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