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Ocean Observing: Tools and Toys

Some of the tools of the trade, or platforms, used for ocean observation.

Argo Floats

Measures: temperature, salinity, and sometimes biochemistry down to 2000+ meters

Autonomous Underwater Vehicles (robots)

Measures: conductivity, temperature, fluorescence, dissolved oxygen, and more

CTD

Conductivity-temperature-depth (CTD) profilers are the workhorses of oceanography and are often the first instrument physical oceanographers learn to use. No physical…

Drifters

Measures: surface currents

High-Frequency Radar

High-frequency (HF) radar measures coastal surface currents by utilizing the Doppler Effect, the same way that the police monitor one’s speed on the highway. A coastal ocean…

Satellite Remote Sensing

Measures: sea surface temperature, ocean color, wind speed, sea surface height anomalies, and more

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© 2025, Matthew D. Grossi

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