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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

Geographic Region
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: 2025-12-14

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
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Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

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