N: 74 S: 73 E: -152 W: -156
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.
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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 Sort descending | 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 |