OMG Airborne eXpendable Conductivity Temperature Depth (AXCTD) Profiles

(OMG_L2_AXCTD)
Version1
Processing Level2
Start/Stop Date2016-Sep-13 to 2021-Dec-31
Short NameOMG_L2_AXCTD
DescriptionThis dataset contains in situ profile measurements from Airborne eXpendable Conductivity Temperature Depth (AXCTD) probes. It provides salinity, density, temperature and sound velocity as a function of depth in the water column. The AXCTDs were jettisoned from a plane to collect temperature and salinity readings around Greenland, where a ship would have had difficulties maneuvering. After landing in the water, the AXCTDs drop a weighted sensor from the surface that falls at a well-calibrated rate, measuring water temperature and conductivity as it falls. An equation is used to determine the depth of the measurements as the probe falls, and another equation is used to convert temperature, depth and conductivity into salinity. These probes provided measurements of the ocean's physical characteristics around Greenland, where a ship would have had difficulties maneuvering. The AXCTDs are part of the Oceans Melting Greenland (OMG) mission. The AXCTDs were deployed in the fall from 2016 through 2021, covering the entire continental shelf surrounding Greenland as part of a once-per-year survey. The goal of the mission is to find out what contributions the ocean has on Greenland's melting glaciers.
DOI10.5067/OMGEV-AXCT1
MeasurementOCEANS > SALINITY/DENSITY > DENSITY
OCEANS > OCEAN TEMPERATURE > TEMPERATURE PROFILES
OCEANS > SALINITY/DENSITY > SALINITY
OCEANS > SALINITY/DENSITY > CONDUCTIVITY
Swath Width0.01 km
Platform/Sensor
Aircraft
Platform
Name: Aircraft (Aircraft)
Orbit Period: 0.0 minutes
Inclination Angle: 90.0 degrees
/
AXCTD
SENSOR
Name: Airborne eXpendable Conductivity Temperature Depth (AXCTD)
Swath Width: 0.01 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

ProjectOceans Melting Greenland (OMG)
Data ProviderPublisher: NASA/JPL/OMG
Creator: OMG
Release Place: NASA/JPL/PODAAC
Release Date: 2019-Jul-31

FormatnetCDF-4
Keyword(s)OMG, CTD, Greenland
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Coverage
Region: NORTH AMERICA
Region: NORTH AMERICA
Spatial Coverage
North: 83.6 degrees South: 59.1 degrees West: 73.6 degrees East: 180 degrees 
North: 83.6 degrees South: 59.1 degrees West: -180 degrees East: -6.9 degrees 
Time Span: 2016-Sep-13 to 2021-Dec-31
Granule Time Span: 2016-Sep-13 to 2021-Sep-16
Swath Width: 0.01 km
 
NameLong NameUnit
conductivitysea water electrical conductivitymS cm-1
densitysea water densitykg m-3
depthdepthmeters
frameframe
latlatitudedegrees_north
lonlongitudedegrees_east
profile_timetime since probe began descent from ocean surfaceseconds
salinitysea water salinity1e-3
sound_velocityspeed of sound in sea waterm s-1
temperaturesea water temperaturedegrees_C
timetimeseconds since 1970-01-01T00:00:00Z
USER'S GUIDE
DATA CITATION POLICY
DATA RECIPE
Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.
Citation OMG. 2019. OMG AXCTD Profiles. Ver. 1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/OMGEV-AXCT1

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For more information see Data Citations and Acknowledgments.

Journal Reference Fenty, I., J.K. Willis, A. Khazendar, S. Dinardo, R. Forsberg, I. Fukumori, D. Holland, M. Jakobsson, D. Moller, J. Morison, A. Meunchow, E. Rignot, M. Schodlock, A.F. Thompson, K. Tino, M. Rutherford, and N. Trenholm. 2016. Oceans Melting Greenland: Early results from NASA's ocean-ice mission in Greenland. Oceanography 29(4):72-83, https://doi.org/10.5670/ocean.2016.100

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