New Definition of Potential Spicity by the Least Square Method Article Swipe

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Rui Xin Huang , Lu‐Sha Yu , Sheng‐Qi Zhou ·

YOU? · · 2018 · Open Access · · DOI: https://doi.org/10.1029/2018jc014306 · OA: W2894734091

A differentiable function whose contours are orthogonal to potential density ( σ ) contours does not exist. However, such a function, called potential spicity ( π ), can be defined in the least square sense; these two functions form a practically orthogonal coordinate system in potential temperature‐salinity ( θ ‐S) space. Thus, in addition to the classical potential temperature‐salinity ( θ ‐S) diagram, seawater properties can be studied in the potential density‐potential spicity ( σ − π ) diagram.