S-MODE: Saildrone Ocean and Atmospheric Observations

Saildrone Level 1 observations provide in-situ measurements of ocean and atmospheric variables collected during the Sub-Mesoscale Ocean Dynamics Experiment (S-MODE). The dataset includes temperature, salinity, currents, Chlorophyll-a fluorescence, dissolved oxygen, winds, air temperature, and surface radiation, collected approximately 300 km offshore of San Francisco. Data spans a pilot campaign in October 2021 and two intensive operating periods in Fall 2022 and Spring 2023.

Use Cases

• Analyzing sub-mesoscale ocean currents and their vertical transport using Acoustic Doppler Current Profiler (ADCP) data.
• Investigating phytoplankton dynamics and primary production based on Chlorophyll-a fluorescence measurements.
• Studying air-sea heat and momentum fluxes using 5-m wind, air temperature, and surface radiation data.
• Calibrating satellite-derived sea surface temperature and ocean color products with in-situ salinity and temperature records.
• Examining dissolved oxygen variability in relation to physical mixing and biological activity.

Strengths

• Contains high-frequency raw data (1 Hz for ADCP, up to 20 Hz for other sensors) alongside 1-minute and 5-minute averaged products.
• Data collected during a targeted scientific campaign (S-MODE) with a clear objective to study sub-mesoscale dynamics.
• Cross-platform presence on Data.gov and NASA EarthData indicates recognized importance and curation.

Limitations

• Metadata completeness is medium; specific column names, row counts, and file sizes are not provided in the input.
• Conflicting 'last updated' dates exist between sources (2026-04 09 on Data.gov vs. 2022-11-30 on NASA EarthData).
• Documentation gaps: the exact license terms under 'other-license-specified' are not detailed.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Measurements from wind-and-solar-powered Saildrone unmanned surface vehicles equipped with atmospheric and oceanic sensors.

Time Range

October 2021, Fall 2022, and Spring 2023.

Freshness

2026-04-09 22:23:40.351221

Geography

Approximately 300 km offshore of San Francisco, California, USA.