The absolute seawater entropy: Part II. Case studies

TL;DR

This paper applies the absolute seawater entropy concept to various oceanic regions, revealing new isentropic structures influenced by temperature and salinity variations, and discusses potential turbulent processes affecting entropy.

Contribution

It provides concrete case studies demonstrating the application of absolute seawater entropy to real-world ocean data, expanding understanding of oceanic thermodynamic structures.

Findings

Identification of new isentropic regions in different seas

Correlation between temperature, salinity, and entropy organization

Implication of turbulence in entropy variations

Abstract

The aim of this second part of the article is to study the absolute definition of the seawater entropy described in Part I with several concrete cases. Observed vertical profiles and polar transects, as well as analysed surface data, show that very different temperatures and salinity values can organise to create new isentropic regions. This can only be revealed by the absolute formulation of the entropy of seawater (Arctic Ocean; Bay of Bengal; Mediterranean, Black, and Caspian Seas). Existing hypotheses to explain these results include the possible impact of turbulent processes that must be applied to the entropies of the atmosphere and oceans.