Diurnal and seasonal variations of space charge, electric field and cloud condensation nuclei in the lowest layer of the atmosphere

A. Mary Selvam; G. K. Manohar; S. S. Khandalgaonkar; A. S. Ramachandra Murty; Bh. V. Ramana Murty

doi:10.3402/tellusa.v32i3.10578

Diurnal and seasonal variations of space charge, electric field and cloud condensation nuclei in the lowest layer of the atmosphere

Tellus

Volume 32 (1980): Issue 3

By: A. Mary Selvam, G. K. Manohar, S. S. Khandalgaonkar, A. S. Ramachandra Murty and Bh. V. Ramana Murty

Open Access

|Jan 1980

Abstract

Diurnal and seasonal variations of space charge, vertical electric field and cloud condensation nuclei in the lowest layers of the atmosphere during winter, pre-monsoon, monsoon and post-monsoon seasons were studied.

The curve showing the diurnal variation of space charge exhibited a double oscillation corresponding to that of the electric field during winter and pre-monsoon seasons. Similar features are absent during monsoon and post-monsoon seasons. During pre-monsoon the semi-diurnal components of space charge and electric field are in phase while in winter the semi-diurnal component of space charge occurs 1 h ahead of the electric field component.

The mean values and diurnal ranges of both space charge and electric field are high during winter/pre-monsoon and are low during monsoon/post-monsoon seasons. The diurnal range of temperature and concentration of cloud condensation nuclei are positively correlated with space charge and the electric field.

The pre-sunrise minimum in the electric field is associated with the characteristics of the F-region of the ionosphere rather than with the ground sunrise time. The variations in the F₂ layer critical frequency (f₀F₂) are reflected in the diurnal and ter-diurnal components of the surface electric field. The results of the present study support the hypothesis that the increase in the electrosphere potential could be the source of the atmospheric electric sunrise effect (Muir, 1975).

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Articles in this issue

DOI: https://doi.org/10.3402/tellusa.v32i3.10578 | Journal eISSN: 3035-9554

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Language: English

Page range: 232 - 244

Submitted on: May 7, 1979

Accepted on: Nov 16, 1979

Published on: Jan 1, 1980

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 1980 A. Mary Selvam, G. K. Manohar, S. S. Khandalgaonkar, A. S. Ramachandra Murty, Bh. V. Ramana Murty, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 32 (1980): Issue 3