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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 ocean temperature, salinity, and acoustic range measurements collected by an autonomous under ice float deployed in the Beaufort Sea from September 10, 2022 to October 22, 2022. Data are available in netCDF format.

Product Summary

Platforms
BUOYS
Instruments
CTD
Spatial Extent

N: 74 S: 73 E: -152 W: -156

Geographic Region
BEAUFORT SEA
Coordinate System
GEODETIC
Granule Spatial Representation
CARTESIAN
Temporal Extent
2022-09-10 to 2022-10-23
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC)
Concept ID
C2637328093-POCLOUD
Data State
COMPLETE
Number of Files/Granules
1
Processing Level
2P
Science Keywords
OCEAN TEMPERATURE PROFILES ,
CONDUCTIVITY PROFILES ,
OCEAN SALINITY PROFILES ,
Salinity ,
Conductivity ,
Water Pressure

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

Shcherbina, A. (2022). SASSIE Arctic Field Campaign Under-ice Float Data Fall 2022 [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/SASSIE-ICFLT2 Date Accessed: 2025-12-14

Documents

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
float_pressure Pressure at the float center dbar double -9999 -1 to 1000 1
latitude_GPS latitude_GPS degree_north double -9999 -90 to 90 1
longitude_GPS longitude_GPS degree_east double -9999 -180 to 180 1
pressure Pressure at the two CTD units dbar double -9999 -1 to 1000 1
pressure_HRCTD Pressure at the HR CTD dbar double -9999 -1 to 1000 1
pressure_sonar Pressure at the sonar dbar double -9999 -1 to 1000 1
range_sonar Acoustic range to the bottom of the ice or surface of the ocean, assuming nominal 1500 m s^-1 sound speed m double -9999 -10 to 1000 1
salinity Sea water practical salinity 1 double -9999 0 to 40 1
salinity_HRCTD Sea water practical salinity 1 double -9999 0 to 40 1
temperature Sea water temperature degree_C double -9999 -2 to 40 1
temperature_HRCTD Sea water temperature degree_C double -9999 -2 to 40 1
time_CTD Time for CTD record Days since 1950-01-01T00:00:00Z double -9999 26550.944895833 to 26592.768090278 1
time_GPS Time for GPS record Days since 1950-01-01T00:00:00Z double -9999 26550.965983796 to 26593.079872685 1
time_HRCTD Time for HR CTD record Days since 1950-01-01T00:00:00Z double -9999 26550.961226852 to 26592.62474537 1
time_sonar Time for Sonar record Days since 1950-01-01T00:00:00Z double -9999 26550.945127315 to 26592.685289352 1
unit_CTD Sequential number of the CTD units (1: bottom, 2: top) N/A double -9999 N/A 1
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