Estimating the Density and Compressibility of Natural Hypersaline Brines Using the Pitzer Ionic Interaction Model

Sharp, Jonathan D.; Albehadili, Muayad Hasan; Millero, Frank J.; Woosley, Ryan J.

doi:10.1007/s10498-015-9252-4

Cited by 4 publications

(2 citation statements)

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“…They approximate singleion activities as series expansions with respect to the ion concentrations and adjust the unknown empirical coefficients to other measurable properties (Nesbitt, 1980;Marion and Grant, 1994;Prausnitz et al, 1999;Marion and Kargel, 2008;Marion et al, 2011). Pitzer equations for seawater ions successfully describe colligative properties, while other thermodynamic properties such as sound speed may not yet be represented as accurately as by TEOS-10 (Feistel and Marion, 2007;Feistel, 2008a;Sharp et al, 2015). Based on the reference-composition model of TEOS-10 (Millero et al, 488 R. Feistel: Thermodynamic properties of seawater, ice and humid air 2008), studies are underway aiming at a definition of seawater pH in terms of Pitzer equations as functions of SItraceable measurands (Waters and Millero, 2013;Turner et al, 2016;Camões et al, 2016).…”

Section: Seawater Phmentioning

confidence: 99%

Thermodynamic properties of seawater, ice and humid air: TEOS-10, before and beyond

Feistel

2018

Ocean Sci.

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Abstract. In the terrestrial climate system, water is a key player in the form of its different ambient phases of ice, liquid and vapour, admixed with sea salt in the ocean and with dry air in the atmosphere. For proper balances of climatic energy and entropy fluxes in models and observations, a highly accurate, consistent and comprehensive thermodynamic standard framework is requisite in geophysics and climate research. The new Thermodynamic Equation of Seawater -2010 (TEOS-10) constitutes such a standard for properties of water in its various manifestations in the hydrological cycle.

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Section: Seawater Phmentioning

confidence: 99%

Thermodynamic properties of seawater, ice and humid air: TEOS-10, before and beyond

Feistel

2018

Ocean Sci.

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“…Developed by Shaw (1935), the Jacobi method is the mathematically most elegant way of transforming the various partial derivatives of different thermodynamic potentials into one another, exploiting the convenient formal calculus of functional determinants (Margenau and Murphy, 1943;Landau and Lifschitz, 1966). Namely, if any thermodynamic derivative in two variables, ∂u ∂x y , is considered, it can formally be written as a Jacobian (Eq.…”

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confidence: 99%

Reply to the short comments of Hannes Schmidt of 04 Apr 2018

Feistel¹

2018

Preprint

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In the terrestrial climate system, water is a key player in the form of its different ambient phases of ice, liquid and vapour, admixed with sea salt in the ocean and with dry air in the atmosphere. For proper balances of climatic energy and entropy fluxes in models and observations, a highly accurate, consistent and comprehensive thermodynamic standard framework is requisite in geophysics and climate research. The new Thermodynamic Equation of Seawater-2010 (TEOS-10) constitutes such a standard for properties of water in its various manifestations in the hydrological cycle. TEOS-10 was recommended internationally in 2009 by the Intergovernmental Oceanographic Commission (IOC) to replace the previous 1980 seawater standard, EOS-80, and in 2011 by the International Union of Geodesy and Geophysics (IUGG) "as the official description for the properties of seawater, of ice and of humid air". This paper briefly reviews the development of TEOS-10, its novel axiomatic properties, the new oceanographic tools it offers and the important tasks that still await solutions by ongoing research. Among the latter are new definitions and measurement standards for seawater salinity and pH in order to establish their metrological traceability to the International System of Units (SI) for the first time after a century of widespread use. Of similar climatological relevance is the development and recommendation of a uniform standard definition of atmospheric relative humidity that is unambiguous and rigorously based on physical principles. "The leading thermodynamic properties of a fluid are determined by the relations which exist between volume, pressure, temperature, energy, and entropy. .. But all the relations existing between these five quantities for any substance. .. may be deduced from the single relation existing for that substance between volume, energy, and entropy."

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Sonar equations for planetary exploration

Ainslie

Leighton

2016

The Journal of the Acoustical Society of America

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The set of formulations commonly known as "the sonar equations" have for many decades been used to quantify the performance of sonar systems in terms of their ability to detect and localize objects submerged in seawater. The efficacy of the sonar equations, with individual terms evaluated in decibels, is well established in Earth's oceans. The sonar equations have been used in the past for missions to other planets and moons in the solar system, for which they are shown to be less suitable. While it would be preferable to undertake high-fidelity acoustical calculations to support planning, execution, and interpretation of acoustic data from planetary probes, to avoid possible errors for planned missions to such extraterrestrial bodies in future, doing so requires awareness of the pitfalls pointed out in this paper. There is a need to reexamine the assumptions, practices, and calibrations that work well for Earth to ensure that the sonar equations can be accurately applied in combination with the decibel to extraterrestrial scenarios. Examples are given for icy oceans such as exist on Europa and Ganymede, Titan's hydrocarbon lakes, and for the gaseous atmospheres of (for example) Jupiter and Venus.

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Estimating the Density and Compressibility of Natural Hypersaline Brines Using the Pitzer Ionic Interaction Model

Cited by 4 publications

References 44 publications

Thermodynamic properties of seawater, ice and humid air: TEOS-10, before and beyond

Thermodynamic properties of seawater, ice and humid air: TEOS-10, before and beyond

Reply to the short comments of Hannes Schmidt of 04 Apr 2018

Sonar equations for planetary exploration

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