Role of Corona Space Charge in Electrification of Convective Thunderclouds

Singh, Pratap; Verma, T. S.; Varshneya, N. C.

doi:10.2151/jmsj1965.62.5_775

Cited by 3 publications

(5 citation statements)

References 22 publications

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“…Consequently a significant reduction in the concentration of negative ions at the surface of a moving thundercloud is resulted. Singh et al (1985a) have shown that concentration of negative ions on the cloud surface is one of the important feature to influence the build up of electric field inside the thundercloud. The results show that lower concentration of negative ions at the cloud surface of moving thundercloud delays the development of electric field (Fig.…”

Section: Computation and Discussionmentioning

confidence: 99%

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Effect of Thundercloud Motion of Its Microphysical Processes

Singh

Verma

Varshneya

1986

Journal of the Meteorological Society of Japan

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The important feature of the present study is to consider the specific concept of thundercloud motion and quantify the sets of microphysical processes operating within and around a thundercloud. The present study shows that saturation space charge density at the upper boundary of a thundercloud reduces due to upward motion of the cloud. The obtained results also show that growth rate of electric field inside a moving thundercloud is declined with respect to a motionless thundercloud. The effect of the reduced electric field growth rate on charging of precipitation particles and precipitation development has also been discussed.

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Section: Computation and Discussionmentioning

confidence: 99%

“…The other parameters used in equation (29) and (20) are defined in brief in Notation list. However, the detailed description has been presented in Singh et al (1985a). The other governing equations for the rate of total charge transferred to the particles of jth category and their growth rate are given in appendix.…”

Section: Introductionmentioning

confidence: 99%

Effect of Thundercloud Motion of Its Microphysical Processes

Singh

Verma

Varshneya

1986

Journal of the Meteorological Society of Japan

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“…We consider a cloud of cylindrical shape containing precipitation particles and supercooled water droplets (Illingworth and Latham 1977;Mathpal and Varshneya 1983;Singh et al 1984). Figure 1 shows the dimensions of the thundercloud for the present analysis.…”

Section: Mathematical Approachmentioning

confidence: 99%

“…Figure 1 shows the dimensions of the thundercloud for the present analysis. It has been assumed that a cloud accumulates positive charge at the top and negative charge at the bottom by inductive charging mechanism, while in the intervening zone charge varies linearly with height (Mathpal and Varshneya 1983;Singh et al 1984). The growth rate of an electric field in a finite thundercloud (figure 1) can be written as (Singh et al 1984)…”

Section: Mathematical Approachmentioning

confidence: 99%

“…Winn et al (1978) reported the presence of screening charge layers at cloud boundaries, negatively charged downdraft and strong association between field structures and air motions. Vonnegut (1955), Moore (1977), Mathpal et al (1982) and Singh et al (1984) have also suggested that convective transport of negative screening charge into the lower region of a thundercloud through its outer periphery contributes very much to the electrification of thunderclouds. Recently Singh et al (1985) have shown the contribution of screening charge transport in the microphysical processes of thunderclouds.…”

Section: Mathematical Approachmentioning

confidence: 99%

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Some theoretical aspects of electric field and precipitation growth in a finite thundercloud

1986

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A time-dependent numerical model allowing a simulation of the electric field and precipitation growth in a thundercloud of finite dimensions is described. It is found that slower growth rate (compared to an infinite thundercloud) of the electric field in a finite thundercloud permits larger size growth and higher terminal velocities of hydrometeors owing to an enhancement in precipitation intensity. Calculations also show that a higher maximum of the electric field is needed to slow down the larger particles produced in a thundercloud of finite dimensions. In particular, these solutions also include contribution of screening charge transport in thundercloud electrification.

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The Effect of Screening Charge Transport on Electrification and Precipitation Processes in Thunderclouds

Singh

Verma

Mathpal

et al. 1985

Journal of the Meteorological Society of Japan

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Considering the growth of hydrometeors along with electrical state and interaction among all categories of particles in thunderclouds, the effect of screening charge transport on electric field, precipitation intensity, charge, size and fall velocity of hydrometeors, has been studied. The study reveals that screening charge transport increases the growth rates of electric fields and decreases the precipitation intensities. The calculations show that thunderclouds containing low precipitation intensities, can also generate high electric fields within appropriate time intervals.

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Role of Corona Space Charge in Electrification of Convective Thunderclouds

Cited by 3 publications

References 22 publications

Effect of Thundercloud Motion of Its Microphysical Processes

Effect of Thundercloud Motion of Its Microphysical Processes

Some theoretical aspects of electric field and precipitation growth in a finite thundercloud

The Effect of Screening Charge Transport on Electrification and Precipitation Processes in Thunderclouds

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