N: 38.1 S: 36.3 E: -122.9 W: -125.4
Description
This dataset contains shipboard Underway conductivity, temperature, and depth (UCDT) measurements taken during the Sub-Mesoscale Ocean Dynamics Experiment (S-MODE) pilot campaign conducted approximately 300 km offshore of San Francisco over two weeks in October 2021. 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. The Underway CTD system contains a standard UCDT probe measuring conductivity, temperature, and pressure, as well as an augmented EcoCDT probe that concurrently measures both hydrographic and bio-optical data including conductivity, temperature, pressure, dissolved oxygen concentration, chlorophyll-fluorescence, and particulate backscatter at two different wavelengths. Level 3 data are available in netCDF format with dimensions of profile number and depth.
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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 | Offset |
|---|---|---|---|---|---|---|---|
| absolute_salinity | EcoCTD Absolute Salinity Measurement | g kg-1 | double | N/A | 2 to 42 | 1 | N/A |
| absolute_salinity_qc | EcoCTD Absolute Salinity Measurement Quality Control | 1 | double | N/A | -1 to 1 | 1 | N/A |
| backscatter_at_470nm | EcoCTD backscattering at 470nm Measurement | m-1 sr-1 | double | N/A | 0 to 500 | 1 | N/A |
| backscatter_at_470nm_qc | EcoCTD backscattering at 470nm Measurement Quality Control | 1 | double | N/A | -1 to 1 | 1 | N/A |
| backscatter_at_700nm | EcoCTD backscattering at 700nm Measurement | m-1 sr-1 | double | N/A | 0 to 500 | 1 | N/A |
| backscatter_at_700nm_qc | EcoCTD backscattering at 700nm Measurement Quality Control | 1 | double | N/A | -1 to 1 | 1 | N/A |
| chlorophyll_concentration | EcoCTD Chlorophyll Concentration Measurement | ug L-1 | double | N/A | 0 to 500 | 1 | N/A |
| chlorophyll_concentration_qc | EcoCTD Chlorophyll Concentration Measurement Quality Control | 1 | double | N/A | -1 to 1 | 1 | N/A |
| conductivity | EcoCTD Conductivity Measurement | S m-1 | double | N/A | 0 to 42 | 1 | N/A |
| conductivity_qc | EcoCTD Conductivity Measurement Quality Control | 1 | double | N/A | -1 to 1 | 1 | N/A |
| conservative_temp | EcoCTD Conservative Temperature Measurement | degree_C | double | N/A | -2 to 30 | 1 | N/A |
| conservative_temp_qc | EcoCTD Conservative Temperature Measurement Quality Control | 1 | double | N/A | -1 to 1 | 1 | N/A |
| latitude | Latitude of EcoCTD Measurement | degrees_north | double | N/A | N/A | 1 | N/A |
| longitude | Longitude of EcoCTD Measurement | degrees_east | double | N/A | N/A | 1 | N/A |
| O2sat | EcoCTD Oxygen Saturation Measurement | percent | double | N/A | 0 to 150 | 1 | N/A |
| O2_sat_qc | EcoCTD Oxygen Saturation Measurement Quality Control | 1 | double | N/A | -1 to 1 | 1 | N/A |
| O2_sensor_temp | EcoCTD optode Temperature Measurement | degree_C | double | N/A | 0 to 40 | 1 | N/A |
| O2_sensor_temp_qc | EcoCTD optode Temperature Measurement Quality Control | 1 | double | N/A | -1 to 1 | 1 | N/A |
| Phase_number | see data report | 1 | double | N/A | 0 to 5 | 1 | N/A |
| practical_salinity | EcoCTD Practical Salinity Measurement | 1 | double | N/A | 2 to 42 | 1 | N/A |
| practical_salinity_qc | EcoCTD Practical Salinity Measurement Quality Control | 1 | double | N/A | -1 to 1 | 1 | N/A |
| pressure | Sea Pressure of EcoCTD Measurement | dbar | double | N/A | N/A | 1 | N/A |
| pressure_qc | Sea Pressure Measurement Quality Control | 1 | double | N/A | -1 to 1 | 1 | N/A |
| temperature | EcoCTD Temperature | degree_C | double | N/A | -2 to 30 | 1 | N/A |
| temperature_qc | EcoCTD Temperature Quality Control | 1 | double | N/A | -1 to 1 | 1 | N/A |
| time | Time of EcoCTD Measurement | days since 1950-01-01 | double | N/A | N/A | 1 | N/A |
| time_qc | Time Measurement Quality Control | 1 | double | N/A | -1 to 1 | 1 | N/A |
| Transect_number | see data report | 1 | double | N/A | 0 to 40 | 1 | N/A |