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Dynamics of Ocean Currents and Fronts
Physical Oceanography
Graduate School of Oceanography
University of Rhode Island
Narragansett, RI 02882

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Inverted Echo Sounders (IES/PIES/CPIES)
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Scientific Applications

"Mapping Circulation in the Kuroshio Extension with an array of Current and Pressure recording Inverted Echo Sounders", recently published in the Journal of Atmospheric and Oceanic Technology, describes a comprehensive methodology to produce mesoscale-resolving 4-dimensional circulation fields of temperature, specific volume anomaly, and velocity from an array of CPIES (Donohue et al. 2010, PDF, doi:10.1175/2009JTECHO686.1). This paper consolidates and documents the many advances that have taken place over the past 30 years to interpret IES measurements. Although many of the details in Donohue et al. (2009) are specific to the KESS array, the techniques described are pertinent for analyzing inverted echo sounder, pressure and current measurements in other regions.

Frequently Asked Questions:

What do IES, PIES and CPIES measure?

What do raw data look like?

How are hourly τ measurements obtained from raw τ data?

How is τ at one pressure related to τ at another pressure?

How are τ and thermocline depth related?

How are τ and temperature, salinity and density related?

How is a GEM representation constructed?

What information can be obtained from multiple IESs?

How are PIES/CPIES pressure data processed?

What is detiding?

What is pressure drift?

What is dedrifting?

What is leveling?

What are methods for dedrifting?

How are maps of daily pressure and current fields generated?


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Page last revised on Friday, January 14, 2022