The Diffusion of Atoms and Molecules

Mason, Edward A.; Marrero, T. R.

doi:10.1016/s0065-2199(08)60205-5

Cited by 194 publications

(95 citation statements)

References 196 publications

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“…The diffusive equilibrium model is also used to model the He mole fraction. Molecular diffusion coefficients for CH 4 and He are taken from Mason and Marrero (1970).…”

Section: The Ch 4 and He Distributionsmentioning

confidence: 99%

Structure of the Jovian Stratosphere at the Galileo Probe Entry Site

Yelle

Griffith

Young

2001

Icarus

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The structure of the Jovian stratosphere at the Galileo probe entry site is investigated through calculations of radiative heating rates based on measurements of the temperature profile, composition, and aerosol distribution. From analysis of mid-IR observations of Jupiter, we determine a C 2 H 2 mole fraction of 1.1-4.3 × 10 −6 at 0.01 mbar, and a C 2 H 6 mole fraction of 2.8-6.5 × 10 −6 at 0.4-10 mbar. The derived distributions imply that C 2 H 6 and C 2 H 2 are the most important coolants in the Jovian stratosphere from 0.004 to 10 mbar, and that the stratosphere is close to radiative equilibrium. In Jupiter's stratosphere, as in the stratosphere of the Earth, photochemical species play an essential role in the energy balance.

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“…The diffusive equilibrium model is also used to model the He mole fraction. Molecular diffusion coefficients for CH 4 and He are taken from Mason and Marrero (1970).…”

Section: The Ch 4 and He Distributionsmentioning

confidence: 99%

Structure of the Jovian Stratosphere at the Galileo Probe Entry Site

Yelle

Griffith

Young

2001

Icarus

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“…To a reasonable approximation. diffusi\'ities are proportional to 7'" {T in deg K), and inversely proportional to total pressure P (Schwertz & Brow, 1951), although converting over wide ranges might require second-order corrections (Mason & Marrero, 1970). See also Jarvis (1971).…”

Section: Ljmentioning

confidence: 99%

Diffusion of CO₂and other gases inside leaves

1994

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SUMMARY Diffusion of CO2 in the intercellular airspaces of the leaf mesophyll is one of the many processes that can limit photosynthetic carbon assimilation there. This limitation has been largely neglected in recent years, but both theoretical and empirical evidence is presented showing that it can be substantial, reducing CO2 assimilation rates by 25% or more in some leaves. Intercellular diffusion is fundamentally a three‐dimensional process, because CO2 enters the leaf through discrete stomata, and not through a uniformly porous epidermis. Modelling it in one dimension can cause major underestimation of its limiting effects. Resistance and conductance models often fail to account well for the limitation, in part because they are usually one‐dimensional representations, but also because they treat continuously interacting processes as if they were sequential. A three‐dimensional diffusion model is used to estimate the intercellular limitation in leaves of different structural types. Intercellular gaseous diffusion probably limits CO2 assimilation by at most a few percent in many of the agricultural plants commonly studied by laboratory physiologists, as they usually have thin, amphistaomatous leaves. However, it may cause substantial limitations in the thicker, often hypostomatous leaves of the wild plants that occupy large areas of the earth. Several physiological implications of intercellular diffusion are discussed. I close by reiterating published suggestions that the gas‐exchange parameter commonly termed pi should be renamed pes (es for evaporating surfaces) to avoid the confusing implication that p1, is‘the’intercellular CO2 pressure.

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“…A temperature dependence of a part of the measured binary diffusion coefficients of neutral gases can be approximated by (Mason & Marrero, 1970) …”

Section: Binary Diffusion Coefficients Of N 2 O 2 O He and H Ofmentioning

confidence: 99%

“…The A(n,q) and B(n,q) diffusion constants taken from Mason and Marrero (1970) are presented in Table 1 for…”

Section: Binary Diffusion Coefficients Of N 2 O 2 O He and H Ofmentioning

confidence: 99%

“…The thermal conductivity coefficient of Ar given by equation (3.7) of Vargaftik et al (1993) and based on an analysis of the experimental data at a pressure of 0.1 MPa is used to calculate the thermal conductivity coefficient of air. The diffusion constants that determine the binary diffusion coefficients for the Ar-N 2 and Ar-O 2 interactions are taken from Mason and Marrero (1970). The parameters of the Lennard-Jones (12-6) potential are given by Weaver and Alexeenko (2015) for the Ar-Ar interactions.…”

Section: The Interaction Potentials Used In Calculations Ofmentioning

confidence: 99%

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Thermal Conductivity of the Multicomponent Neutral Atmosphere

Павлов

2017

JGR Space Physics

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Approximate expressions for the thermal conductivity coefficient of the multicomponent neutral atmosphere consisting of N2, O2, O, He, and H are analyzed and evaluated for the atmospheric conditions by comparing them with that given by the rigorous hydrodynamic theory. The new approximations of the thermal conductivity coefficients of simple gases N2, O2, O, He, and H are derived and used. It is proved that the modified Mason and Saxena approximation of the atmospheric thermal conductivity coefficient is more accurate in reproducing the atmospheric values of the rigorous hydrodynamic thermal conductivity coefficient in comparison with those that are generally accepted in atmospheric studies. This approximation of the thermal conductivity coefficient is recommended to use in calculations of the neutral temperature of the atmosphere.

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The Diffusion of Atoms and Molecules

Cited by 194 publications

References 196 publications

Structure of the Jovian Stratosphere at the Galileo Probe Entry Site

Structure of the Jovian Stratosphere at the Galileo Probe Entry Site

Diffusion of CO₂and other gases inside leaves

Thermal Conductivity of the Multicomponent Neutral Atmosphere

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The Diffusion of Atoms and Molecules

Cited by 194 publications

References 196 publications

Structure of the Jovian Stratosphere at the Galileo Probe Entry Site

Structure of the Jovian Stratosphere at the Galileo Probe Entry Site

Diffusion of CO2and other gases inside leaves

Thermal Conductivity of the Multicomponent Neutral Atmosphere

Contact Info

Product

Resources

About

Diffusion of CO₂and other gases inside leaves