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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

Geographic Region
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: 2025-12-14

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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
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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