Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

On some characteristics of tropical atmospherics due to monsoon clouds

Über Charakteristiken tropischer Atmospherics aus Monsunwolken


The field intensity of VLF-atmospherics recorded over the tropical station, Calcutta (22°34′N, 88°24′E) occasionally exhibit a characteristic fall in association with the ground rainfall during monsoon months. The sudden fall is followed by a pause and a subsequent recorvery thus forming a clipped saw-tooth like appearance. The occurrences and magnitudes of the fall are predominant at 20 kHz in the VLF-band. They mostly occur around local noon and midnight hours.


Die Feldintensität der VLF-Atmospherics, die über Calcutta registriert wurde, zeigt gelegentlich einen charakteristischen Abfall in Verbindung mit Regen in den Monsun-Monaten. Auf den plötzlichen Abfall folgt eine Unterbrechung und darauf eine Wiederherstellung, so daß sich eine sägezahnartige Form in der Registrierkurve bildet. Das Vorkommen und die Größen des Abfalls überwiegen bei 20 kHz im VLF-Band. Am häufigsten kommt der Abfall um Mittag und um Mitternacht vor.

This is a preview of subscription content, log in to check access.


  1. 1.

    Bhattacharya, A. B., Sarkar, S. K., Sen, A. K.: Characteristics of Lightning as Derived from Atmospherics. J. Sci. Industr. Res.38, 300–307 (1979).

  2. 2.

    Bhattacharya, A. B., Sarkar, S. K., Sen, A. K.: Regular Behaviour of the Field Intensity of VLF Atmospherics over Calcutta. J. Inst. Electr. Telecom. Engrs.26, 279–282 (1980).

  3. 3.

    Das, P. K.: The Monsoons, 162 pp. London: Arnold 1972.

  4. 4.

    Kimpara, A.: Electromagnetic Energy Radiated from Lightnings. Problems of Atmospheric and Space Electricity, edited by S. C. Coroniti, pp. 352–365. Amsterdam: Elsevier Publ. Co. 1965.

  5. 5.

    Lockwood, J. G.: The Indian Monsoon — A Review. Weather20, 2–8 (1965).

  6. 6.

    Ramage, C. S.: Monsoon Meteorology, pp. 4–6. New York: Academic Press 1971.

  7. 7.

    Sarkar, S. K., Bhattacharya, A. B.: Some Aspects of the Nighttime Effect of VLF Atmospherics in Relation to Sea Thunderstorms. J. Geoph. Res.84, 6365–6369 (1979).

  8. 8.

    Sarkar, S. K., Bhattacharya, A. B., Sen, A. K.: Characteristics of VLF Atmospherics During Tropical Thunderstorms. Arch. Met. Geoph. Biokl., Ser. A29, 131–141 (1980).

  9. 9.

    Sen, A. K.: Sudden Decrease of Atmospherics Associated with Monsoon Clouds. J. Atmos. Terr. Phys.28, 127–129 (1966).

  10. 10.

    Srinivasan, V., Sadasivan, V.: Thermodynamic Structure of the Atmosphere Over India During Southwest Monsoon Season. Indian J. Met. Hydrol. Geoph.26, 169–180 (1975).

  11. 11.

    Takahashi, T.: Measurement of Electric Charge of Cloud Droplets, Arizzle and Raindrops, Reviews. Geoph. Sp. Phys.11, 903–924 (1973).

Download references

Author information

Additional information

With 6 Figures

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Sarkar, S.K., Bhattacharya, A.B. & Sen, A.K. On some characteristics of tropical atmospherics due to monsoon clouds. Arch. Met. Geoph. Biocl. A. 31, 411–419 (1982).

Download citation


  • Climate Change
  • Waste Water
  • Water Management
  • Water Pollution
  • Field Intensity