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Description

This dataset contains profiles of temperature, dissolved oxygen, salinity, and other observations collected by Seagliders during the Sub-Mesoscale Ocean Dynamics Experiment (S-MODE) field campaign. The experiment was conducted approximately 300 km offshore of San Francisco, during two intensive operating periods in Fall 2022 and 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. Seagliders are autonomous underwater vehicles (AUVs) designed to glide from the ocean surface to as deep as 1000 m and back while
collecting profiles of oceanic variables. Data are available in netCDF format.

Product Summary

Platforms
SEAGLIDER
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
2022-08-23 to 2023-07-07
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC)
Concept ID
C2766303078-POCLOUD
Data State
COMPLETE
Number of Files/Granules
12
Processing Level
2
Science Keywords
Oxygen ,
Salinity ,
Scattering ,
Chlorophyll Concentration ,
SURFACE CURRENTS ,
SUBSURFACE CURRENTS

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. (2023). S-MODE Seaglider Observations Version 1 [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/SMODE-SEAGL2 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
aa4831_time date in for every sample point seconds since 1970-01-01T00:00:00Z double N/A N/A 1
depth depth m float N/A N/A 1
dissolved_oxygen Dissolved oxygen recalculated from phase with salinity and pressure corrections umol kg-1 float -999 N/A 1
gps_end_lat Latitude of GPS fix at end of the dive degrees_north float N/A -90 to 90 1
gps_end_lon Longitude of the GPS fix at end of the dive degrees_east float N/A -180 to 180 1
gps_end_time Time of the GPS fix at the end of the dive seconds since 1970-01-01T00:00:00Z float N/A N/A 1
gps_start_lat Latitude of GPS fix at start of the dive degrees_north float N/A -90 to 90 1
gps_start_lon Longitude of the GPS fix at start of the dive degrees_east float N/A -180 to 180 1
gps_start_time Time of the GPS fix at the start of the dive seconds since 1970-01-01T00:00:00Z float N/A N/A 1
inst_aa4831 inst_aa4831 N/A double N/A N/A 1
inst_ctd inst_ctd N/A double N/A N/A 1
inst_wlbb2fl inst_wlbb2fl N/A double N/A N/A 1
latitude latitude of every sample point, from the flight model when underwater degrees_north float N/A -90 to 90 1
lat_dive average latitude of the dive degrees_north float N/A N/A 1
longitude longitude of every sample point, from the flight model when underwater degrees_east float N/A -180 to 180 1
lon_dive average longitude of the dive degrees_east float N/A N/A 1
salinity corrected salinity 1 float -999 0 to 40 1
surface_curr_east surface current in the east direction from the gps track m s-1 float -999 -2 to 2 1
surface_curr_north surface current in the north direction from gps track m s-1 float -999 -2 to 2 1
temperature corrected in-situ temperature degrees_C float -999 -2.6 to 40 1
time time for every sample point seconds since 1970-01-01T00:00:00Z double N/A N/A 1
time_dive average time for the dive seconds since 1970-01-01T00:00:00Z float N/A N/A 1
u_dive depth-average current in the east direction from the flight model m s-1 float -999 -2 to 2 1
v_dive depth-average current in the north direction from the flight model m s-1 float -999 -2 to 2 1
wlbb2fl_sig470nm_adjusted total volume blue scattering coefficient using manufacturer-supplied dark counts and scaling factor m-1 sr-1 float -999 0 to 0.1 1
wlbb2fl_sig695nm_adjusted chlorophyll-a concentration using manufacturer-supplied dark counts and scaling factor based on phytoplankton monoculture ug L-1 float -999 N/A 1
wlbb2fl_sig700nm_adjusted total volume red scattering coefficient using manufacturer-supplied dark counts and scaling factor m-1 sr-1 float -999 N/A 1
wlbb2fl_time date for every sample point seconds since 1970-01-01T00:00:00Z double N/A N/A 1
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