Mid-latitude convective boundary-layer electricity: A study by large-eddy simulation

Anisimov, S. V.; Galichenko, S. V.; Prokhorchuk, A. A.; Aphinogenov, K. V.

doi:10.1016/j.atmosres.2020.105035

Cited by 16 publications

(7 citation statements)

References 62 publications

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“…Although the contribution of meteorological processes to air pollution events is usually assumed, it is frequently relegated to the background. Physical processes in the atmosphere are varied and include clear-sky surface solar radiation reduction by aerosols [ 11 ] or the study of their scattering angle [ 12 ], temperature inversions associated with air pollution and health effects [ 13 ], or analysis of electricity in the convective boundary layer [ 14 ]. Moreover, meteorological processes may have contrasting effects.…”

Section: Introductionmentioning

confidence: 99%

Key Points in Air Pollution Meteorology

Pérez

García

Sánchez

et al. 2020

IJERPH

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Although emissions have a direct impact on air pollution, meteorological processes may influence inmission concentration, with the only way to control air pollution being through the rates emitted. This paper presents the close relationship between air pollution and meteorology following the scales of atmospheric motion. In macroscale, this review focuses on the synoptic pattern, since certain weather types are related to pollution episodes, with the determination of these weather types being the key point of these studies. The contrasting contribution of cold fronts is also presented, whilst mathematical models are seen to increase the analysis possibilities of pollution transport. In mesoscale, land–sea and mountain–valley breezes may reinforce certain pollution episodes, and recirculation processes are sometimes favoured by orographic features. The urban heat island is also considered, since the formation of mesovortices determines the entry of pollutants into the city. At the microscale, the influence of the boundary layer height and its evolution are evaluated; in particular, the contribution of the low-level jet to pollutant transport and dispersion. Local meteorological variables have a major influence on calculations with the Gaussian plume model, whilst some eddies are features exclusive to urban environments. Finally, the impact of air pollution on meteorology is briefly commented on.

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Section: Introductionmentioning

confidence: 99%

Key Points in Air Pollution Meteorology

Pérez

García

Sánchez

et al. 2020

IJERPH

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“…with a geometric distribution of the lengths of random isotropic wave vectors k n in the range from the geometric mean width of the LES filter k c to the inverse Kolmogorov scale k  , taking into account the spectral flux of the turbulent kinetic energy (TKE) in the inertial range [20,25,26]…”

Section: Governing Equations and Numerical Methodsmentioning

confidence: 99%

“…Recently performed calculations using contemporary methods for modeling turbulent transport processes in the convective boundary layer gave a smaller range of values not exceeding 20 kV. The results of this simulation made it possible to put forward an assumption about the possibility of the formation of electrical stratification with several series-connected sections, in which the generators can operate in the opposite direction, partially compensating each other [19,20]. Estimates of the electromotive force based on the data collected during systematic ascents and descents of a tethered balloon with a measuring platform fall in the range of 5 -55 kV, which is consistent with those obtained earlier, but the localization of the charge separation region did not allow to assume that the generator was associated with convective mixing of space charge [21].…”

Section: Introductionmentioning

confidence: 98%

On the ratio of the components of the atmospheric vertical electric current density in fair weather

Anisimov

Galichenko²,

Prokhorchuk³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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This work presents the results of ground-based and tethered balloon observations of altitude profiles of the components of the atmospheric vertical electric current density. The magnitude of the conduction current density was observed in the range 0.2 - 2 pAm−2. The ratio of the negative to positive component of the conduction current density averaged 1.6 outside the layer, where their dependence on the height was noticeable. In the framework of developed numerical model with reasonable values of the parameters it is found that the ratio of the convection current density to the density of the total vertical atmospheric electric current in the atmospheric boundary layer mainly falls in the range 0.2 - 0.6 and tends to increase under strong convection and low electrical conductivity. An exponential parameterization of the dependence of the electromotive force on the ground-level electrical conductivity is proposed.

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“…Mareev and Volodin (2014) modeled diurnal, seasonal, and long-term variability of ionospheric potential using a global circulation model. Anisimov et al (2020) evaluated the mid-latitude boundary layer electrical variability due to vertical turbulent transport of charged and radioactive particles and space charge, using a large eddy simulation approach. The effects constitute a fair-weather convective generator, which can perturb the regional ionospheric potential by 10 kV or so.…”

Section: The Global Circuit and Its Uncertaintiesmentioning

confidence: 99%

Uncertainties in Evaluating Global Electric Circuit Interactions With Atmospheric Clouds and Aerosols, and Consequences for Radiation and Dynamics

Tinsley

2022

JGR Atmospheres

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Observations and theory relevant to evaluating the importance of the effect of Ionosphere‐Earth current density, JZ, in the global electric circuit on cloud microphysics and cloud opacity at high latitudes, with presumed consequences for surface pressure, are reviewed and updated. The day‐to‐day input variations are less than 10% of their mean values, as are the reported cloud and pressure effects, but could be indicative of more important longer‐term effects, and of neglected processes in aerosol‐cloud interactions. There is consistent evidence for responses to both externally (solar‐wind) and internally (thunderstorm and shower‐cloud) generated changes in JZ and cloud opacity. The pressure correlations show non‐stationary behavior, with changes in phase relative to that of the solar wind input and JZ variations on interdecadal timescales. These might be due to the non‐stationary nature of the solar wind, and non‐stationary aerosol populations. For modeling the cloud effects there are considerable uncertainties in the size and charge distributions of aerosol particles, droplets, and ice particles. The cloud radiative coupling with periodic solar wind inputs may nudge internal tropospheric waves into phase coherence at times when the amplitude of the solar input and the duration of the input trains exceed minimum values.

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Mid-latitude convective boundary-layer electricity: A study by large-eddy simulation

Cited by 16 publications

References 62 publications

Key Points in Air Pollution Meteorology

Key Points in Air Pollution Meteorology

On the ratio of the components of the atmospheric vertical electric current density in fair weather

Uncertainties in Evaluating Global Electric Circuit Interactions With Atmospheric Clouds and Aerosols, and Consequences for Radiation and Dynamics

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