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Description

This dataset contains APEX float in-situ measurements taken during the Sub-Mesoscale Ocean Dynamics Experiment (S-MODE) field campaign. Data was collected approximately 300 km offshore of San Francisco, during Spring 2023. S-MODE aims to understand how ocean dynamics acting on short spatial scales influence the vertical exchange of physical and biological variables in the ocean. US Naval Oceanographic Office (NAVO) APEX floats measure subsurface properties including temperature and salinity. Data are available in netCDF format.

Product Summary

Platforms
Argo-Float
Instruments
CTD
Spatial Extent

N: 38.1 S: 36.3 E: -122.9 W: -125.4

Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2023-04-01 to 2023-08-01
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC)
Concept ID
C2864321540-POCLOUD
Data State
COMPLETE
Number of Files/Granules
10
Processing Level
2
Science Keywords
Conductivity ,
OCEAN TEMPERATURE PROFILES ,
Salinity

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

S-MODE. (2024). S-MODE Temperature and Salinity from NAVO Floats Version 1 [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/SMODE-APEX2 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
depth APEX float depth m float N/A N/A 1
latitude latitude recorded by APEX float degree_north double N/A N/A 1
longitude longitude recorded by APEX float degree_east double N/A N/A 1
profile APEX float profile number 1 int N/A N/A 1
profile_number CTD profile number associated with CTD measurement 1 int N/A N/A 1
salinity Sea water practical salinity measured by APEX float 1 float N/A 30 to 40 1
temperature In situ sea water temperature recorded by APEX float degrees_C float N/A -1 to 32 1
time Time recorded by APEX float seconds since 1970-01-01T00:00:00Z double N/A N/A 1
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