WHISTLING CHARACTERISTICS DURING PERIODS OF IONOSPHERIC DISTURBANCES
The results of observations of whistlers in obs. Karymshina (Kamchatka) in the period November-December 2008 are presented. This period was characterized by an excess of f0F2 values and a decrease in hF2 compared to the usual level. This effect was most clearly observed in Irkutsk, however, it also...
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KamGU by Vitus Bering
2019
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Online Access: | https://doi.org/10.26117/2079-6641-2019-29-4-173-181 https://doaj.org/article/738dfb7c2348450b8d0c9c343622e6a9 |
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ftdoajarticles:oai:doaj.org/article:738dfb7c2348450b8d0c9c343622e6a9 2023-05-15T16:58:50+02:00 WHISTLING CHARACTERISTICS DURING PERIODS OF IONOSPHERIC DISTURBANCES Yu. M. Mikhailov O.V. Kapustina G. I. Drugin 2019-11-01T00:00:00Z https://doi.org/10.26117/2079-6641-2019-29-4-173-181 https://doaj.org/article/738dfb7c2348450b8d0c9c343622e6a9 EN RU eng rus KamGU by Vitus Bering http://krasec.ru/wp-content/uploads/2020/01/%D0%94%D1%80%D1%83%D0%B6%D0%B8%D0%BD.pdf https://doaj.org/toc/2079-6641 https://doaj.org/toc/2079-665X doi:10.26117/2079-6641-2019-29-4-173-181 2079-6641 2079-665X https://doaj.org/article/738dfb7c2348450b8d0c9c343622e6a9 Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, Vol 29, Iss 4, Pp 173-181 (2019) whistlers magnetic field electromagnetic radiation ionosphere Science Q article 2019 ftdoajarticles https://doi.org/10.26117/2079-6641-2019-29-4-173-181 2022-12-31T03:49:59Z The results of observations of whistlers in obs. Karymshina (Kamchatka) in the period November-December 2008 are presented. This period was characterized by an excess of f0F2 values and a decrease in hF2 compared to the usual level. This effect was most clearly observed in Irkutsk, however, it also manifested itself in Kamchatka, although it was less pronounced. Such an event is explained [4] by both a change in the composition of the thermosphere and the appearance of the western component of the electric field and the electron concentration gradient at the maximum of disturbances. The latter is also associated with a change in the direction of the northern component of the interplanetary magnetic field [4]. Under normal conditions, the refractive index of VLF waves in daytime conditions is higher than at night [7], and the number of whistlers, on the contrary, is higher at night than during the day. On December 18-19, the appearance of whistling atmospherics in the daytime was observed in Kamchatka in the same amount as at night, about 10 1/min. At the same time, in the periods following the maximum changes in the ionosphere characteristics (23, 24, 27, 29, 30 December), there was a sharp increase in the number of whistles in the daytime to ∼50 1/min. It is possible that in this case the source of whistles were atmospheric discharges initiated in a typhoon, which were observed near the conjugate region in the southern hemisphere. The increase in the number of whistlers is associated with a change in the conditions of capture on the force line L = 2.4. Article in Journal/Newspaper Kamchatka Directory of Open Access Journals: DOAJ Articles Karymshina ENVELOPE(158.291,158.291,52.953,52.953) Вестник КРАУНЦ. Физико-математические науки 4 173 181 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Russian |
topic |
whistlers magnetic field electromagnetic radiation ionosphere Science Q |
spellingShingle |
whistlers magnetic field electromagnetic radiation ionosphere Science Q Yu. M. Mikhailov O.V. Kapustina G. I. Drugin WHISTLING CHARACTERISTICS DURING PERIODS OF IONOSPHERIC DISTURBANCES |
topic_facet |
whistlers magnetic field electromagnetic radiation ionosphere Science Q |
description |
The results of observations of whistlers in obs. Karymshina (Kamchatka) in the period November-December 2008 are presented. This period was characterized by an excess of f0F2 values and a decrease in hF2 compared to the usual level. This effect was most clearly observed in Irkutsk, however, it also manifested itself in Kamchatka, although it was less pronounced. Such an event is explained [4] by both a change in the composition of the thermosphere and the appearance of the western component of the electric field and the electron concentration gradient at the maximum of disturbances. The latter is also associated with a change in the direction of the northern component of the interplanetary magnetic field [4]. Under normal conditions, the refractive index of VLF waves in daytime conditions is higher than at night [7], and the number of whistlers, on the contrary, is higher at night than during the day. On December 18-19, the appearance of whistling atmospherics in the daytime was observed in Kamchatka in the same amount as at night, about 10 1/min. At the same time, in the periods following the maximum changes in the ionosphere characteristics (23, 24, 27, 29, 30 December), there was a sharp increase in the number of whistles in the daytime to ∼50 1/min. It is possible that in this case the source of whistles were atmospheric discharges initiated in a typhoon, which were observed near the conjugate region in the southern hemisphere. The increase in the number of whistlers is associated with a change in the conditions of capture on the force line L = 2.4. |
format |
Article in Journal/Newspaper |
author |
Yu. M. Mikhailov O.V. Kapustina G. I. Drugin |
author_facet |
Yu. M. Mikhailov O.V. Kapustina G. I. Drugin |
author_sort |
Yu. M. Mikhailov |
title |
WHISTLING CHARACTERISTICS DURING PERIODS OF IONOSPHERIC DISTURBANCES |
title_short |
WHISTLING CHARACTERISTICS DURING PERIODS OF IONOSPHERIC DISTURBANCES |
title_full |
WHISTLING CHARACTERISTICS DURING PERIODS OF IONOSPHERIC DISTURBANCES |
title_fullStr |
WHISTLING CHARACTERISTICS DURING PERIODS OF IONOSPHERIC DISTURBANCES |
title_full_unstemmed |
WHISTLING CHARACTERISTICS DURING PERIODS OF IONOSPHERIC DISTURBANCES |
title_sort |
whistling characteristics during periods of ionospheric disturbances |
publisher |
KamGU by Vitus Bering |
publishDate |
2019 |
url |
https://doi.org/10.26117/2079-6641-2019-29-4-173-181 https://doaj.org/article/738dfb7c2348450b8d0c9c343622e6a9 |
long_lat |
ENVELOPE(158.291,158.291,52.953,52.953) |
geographic |
Karymshina |
geographic_facet |
Karymshina |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, Vol 29, Iss 4, Pp 173-181 (2019) |
op_relation |
http://krasec.ru/wp-content/uploads/2020/01/%D0%94%D1%80%D1%83%D0%B6%D0%B8%D0%BD.pdf https://doaj.org/toc/2079-6641 https://doaj.org/toc/2079-665X doi:10.26117/2079-6641-2019-29-4-173-181 2079-6641 2079-665X https://doaj.org/article/738dfb7c2348450b8d0c9c343622e6a9 |
op_doi |
https://doi.org/10.26117/2079-6641-2019-29-4-173-181 |
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Вестник КРАУНЦ. Физико-математические науки |
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