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Description

The Salinity and Stratification at the Sea Ice Edge (SASSIE) project is a NASA experiment that aims to understand how salinity anomalies in the upper ocean generated by melting sea ice affect sea surface temperature (SST), stratification, and subsequent sea-ice growth. SASSIE involved a field campaign that sampled the transition from summer melt to autumn ice advance in the Beaufort Sea during August-October 2022, making intensive in situ and remote sensing observations within ~200 km of the sea ice edge. This dataset contains in-situ profiles of upper ocean temperature and salinity taken with a Shipboard Underway Conductivity-Temperature-Depth instrument (uCTD). A total of 2,246 profiles were taken over the sampling period, with mean depth of 100 m and mean horizontal spacing between profiles of ~800 m. Profiling with the uCTD typically occurred as the ship was moving at 1-3 m/s. For higher sea ice concentrations (10-30 %), the ship stopped every ~30 minutes to collect a profile. The measurements have been gridded onto a uniformly spaced 0.1 dbar grid from the sea surface to 200 dbar seawater pressure, and collected into a single netCDF file, where each observation in the time dimension corresponds to a single cast.

Product Summary

Platforms
Ships
Instruments
CTD
Spatial Extent

N: 73.52 S: 72.02 E: -144.5 W: -153

Location
BEAUFORT SEA
Coordinate System
GEODETIC
Granule Spatial Representation
CARTESIAN
Temporal Extent
2022-09-09 to 2022-09-29
Vertical Extent
Maximum Depth: 200 meters
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC)
Concept ID
C2622954412-POCLOUD
Data State
COMPLETE
Number of Files/Granules
1
Processing Level
2
Science Keywords
OCEAN TEMPERATURE PROFILES ,
CONDUCTIVITY PROFILES ,
OCEAN SALINITY PROFILES

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

Carlyn Schmidgall. (2022). SASSIE Arctic Field Campaign Shipboard uCTD Data Fall 2022 [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/SASSIE-UCTD2 Date Accessed: 2026-02-17

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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
latitude latitude degrees_north double N/A N/A 1
longitude longitude degrees_east double N/A N/A 1
pressure sea_water_pressure_due_to_sea_water dbar double N/A N/A 1
salinity Conductivity measured from RBRconcerto CTD logger was converted to salinity via the Ruskin MATLAB package. 1 double -9999 2 to 42 1
temperature sea_water_temperature degrees_C double -9999 -2 to 30 1
time time Days since 1950-01-01 double N/A N/A 1
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