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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 ~200km of the sea ice edge. This dataset contains delta-18O measurements from sea water and ice. Delta-18O is the ratio of stable isotopes oxygen-18 (18O) and oxygen-16. Water samples were collected from either a GoFlo bottle lowered from the side of the ship, or the outflow of the Salinity Snake. Ice samples (dimension ice_obs) were collected during two ice stations where augur tailings were collected and melted. Data are available in netCDF format.

Product Summary

Platforms
Ships
Instruments
MASS SPECTROMETERS ,
GO-FLO BOTTLES
Spatial Extent

N: 73.3 S: 66 E: -144.8 W: -168.1

Location
BEAUFORT SEA
Coordinate System
GEODETIC
Granule Spatial Representation
CARTESIAN
Temporal Extent
2022-09-09 to 2022-10-03
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC)
Concept ID
C2675866206-POCLOUD
Data State
COMPLETE
Number of Files/Granules
1
Processing Level
2
Science Keywords
Ocean Tracers

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

Drushka, K. (2022). SASSIE Arctic Field Campaign Shipboard Delta-18O Data Fall 2022 [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/SASSIE-D18O2 Date Accessed: 2026-01-29

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
d18O uncertainty is ±0.05 1e-3 double -9999 -8 to 0.8 1
d18O_ice uncertainty is ±0.05 1e-3 double -9999 -8 to 0.8 1
depth uncertainty is 100% m double N/A N/A 1
depth_ice depth represents half of the estimated local sea ice thickness of the ice sample m double N/A N/A 1
latitude latitude degree_north double N/A N/A 1
latitude_ice latitude degree_north double N/A N/A 1
longitude longitude degree_east double N/A N/A 1
longitude_ice longitude degree_east double N/A N/A 1
temperature sea_water_temperature degree_C double -9999 -2 to 30 1
temperature_ice temperature of ice samples was not measured degree_C double -9999 -2 to 30 1
time time Days since 1950-01-01 double N/A N/A 1
time_ice time Days since 1950-01-01 double N/A N/A 1
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