Monthly diurnal global atmospheric circuit estimates derived from Vostok electric field measurements adjusted for local meteorological and solar wind influences
Local temperature, wind speed, pressure, and solar wind–imposed influences on the vertical electric field observed at Vostok, Antarctica, are evaluated by multivariate analysis. Local meteorology can influence electric field measurements via local conductivity. The results are used to improve monthl...
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/94905 2023-12-17T10:19:53+01:00 Monthly diurnal global atmospheric circuit estimates derived from Vostok electric field measurements adjusted for local meteorological and solar wind influences Burns, G. Tinsley, B. Frank-Kamenetsky, A. Troshichev, O. French, W. Klekociuk, A. 2012 http://hdl.handle.net/2440/94905 https://doi.org/10.1175/JAS-D-11-0212.1 en eng American Meteorological Society Journal of the Atmospheric Sciences, 2012; 69(6):2061-2082 0022-4928 1520-0469 http://hdl.handle.net/2440/94905 doi:10.1175/JAS-D-11-0212.1 Klekociuk, A. [0000-0003-3335-0034] © 2012 American Meteorological Society http://dx.doi.org/10.1175/jas-d-11-0212.1 Journal article 2012 ftunivadelaidedl https://doi.org/10.1175/JAS-D-11-0212.110.1175/jas-d-11-0212.1 2023-11-20T23:21:31Z Local temperature, wind speed, pressure, and solar wind–imposed influences on the vertical electric field observed at Vostok, Antarctica, are evaluated by multivariate analysis. Local meteorology can influence electric field measurements via local conductivity. The results are used to improve monthly diurnal averages of the electric field attributable to changes in the global convective storm contribution to the ionosphere-to-earth potential difference. Statistically significant average influences are found for temperature (−0.47 ± 0.13% V m−1 °C−1) and wind speed [2.1 ± 0.5% V m−1 (m s−1)−1]. Both associations are seasonally variable. After adjusting the electric field values to uniform meteorological conditions typical of the Antarctic plateau winter (−70°C, 4.4 m s−1, and 623 hPa), the sensitivity of the electric field to the solar wind external generator influence is found to be 0.80 ± 0.07 V m−1 kV−1. This compares with the sensitivity of 0.82 V m−1 kV−1 to the convective meteorology generator that is inferred assuming an average ionosphere-to-ground potential difference of 240 kV taken with the annual mean electric field value of 198 V m−1. Monthly means of the Vostok electric field corrected for the influence of both local meteorology and the solar wind show equinoctial (March and September) and July local maxima. The July mean electric field is greater than the December value by approximately 8%, consistent with a Northern Hemisphere summer maximum. The solar wind–imposed potential variations in the overhead ionosphere are evaluated for three models that fit satellite measurements of ionospheric potential changes to solar wind data. Correlations with Vostok electric field variations peak with a 23-min interpolated delay relative to solar wind changes at the magnetopause. G. B. Burns, B. A. Tinsley, A. V. Frank-Kamenetsky and O. A. Troshichev, W. J. R. French and A. R. Klekociuk Article in Journal/Newspaper Antarc* Antarctic Antarctica The University of Adelaide: Digital Library Antarctic The Antarctic Journal of the Atmospheric Sciences 69 6 2061 2082 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
description |
Local temperature, wind speed, pressure, and solar wind–imposed influences on the vertical electric field observed at Vostok, Antarctica, are evaluated by multivariate analysis. Local meteorology can influence electric field measurements via local conductivity. The results are used to improve monthly diurnal averages of the electric field attributable to changes in the global convective storm contribution to the ionosphere-to-earth potential difference. Statistically significant average influences are found for temperature (−0.47 ± 0.13% V m−1 °C−1) and wind speed [2.1 ± 0.5% V m−1 (m s−1)−1]. Both associations are seasonally variable. After adjusting the electric field values to uniform meteorological conditions typical of the Antarctic plateau winter (−70°C, 4.4 m s−1, and 623 hPa), the sensitivity of the electric field to the solar wind external generator influence is found to be 0.80 ± 0.07 V m−1 kV−1. This compares with the sensitivity of 0.82 V m−1 kV−1 to the convective meteorology generator that is inferred assuming an average ionosphere-to-ground potential difference of 240 kV taken with the annual mean electric field value of 198 V m−1. Monthly means of the Vostok electric field corrected for the influence of both local meteorology and the solar wind show equinoctial (March and September) and July local maxima. The July mean electric field is greater than the December value by approximately 8%, consistent with a Northern Hemisphere summer maximum. The solar wind–imposed potential variations in the overhead ionosphere are evaluated for three models that fit satellite measurements of ionospheric potential changes to solar wind data. Correlations with Vostok electric field variations peak with a 23-min interpolated delay relative to solar wind changes at the magnetopause. G. B. Burns, B. A. Tinsley, A. V. Frank-Kamenetsky and O. A. Troshichev, W. J. R. French and A. R. Klekociuk |
format |
Article in Journal/Newspaper |
author |
Burns, G. Tinsley, B. Frank-Kamenetsky, A. Troshichev, O. French, W. Klekociuk, A. |
spellingShingle |
Burns, G. Tinsley, B. Frank-Kamenetsky, A. Troshichev, O. French, W. Klekociuk, A. Monthly diurnal global atmospheric circuit estimates derived from Vostok electric field measurements adjusted for local meteorological and solar wind influences |
author_facet |
Burns, G. Tinsley, B. Frank-Kamenetsky, A. Troshichev, O. French, W. Klekociuk, A. |
author_sort |
Burns, G. |
title |
Monthly diurnal global atmospheric circuit estimates derived from Vostok electric field measurements adjusted for local meteorological and solar wind influences |
title_short |
Monthly diurnal global atmospheric circuit estimates derived from Vostok electric field measurements adjusted for local meteorological and solar wind influences |
title_full |
Monthly diurnal global atmospheric circuit estimates derived from Vostok electric field measurements adjusted for local meteorological and solar wind influences |
title_fullStr |
Monthly diurnal global atmospheric circuit estimates derived from Vostok electric field measurements adjusted for local meteorological and solar wind influences |
title_full_unstemmed |
Monthly diurnal global atmospheric circuit estimates derived from Vostok electric field measurements adjusted for local meteorological and solar wind influences |
title_sort |
monthly diurnal global atmospheric circuit estimates derived from vostok electric field measurements adjusted for local meteorological and solar wind influences |
publisher |
American Meteorological Society |
publishDate |
2012 |
url |
http://hdl.handle.net/2440/94905 https://doi.org/10.1175/JAS-D-11-0212.1 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
http://dx.doi.org/10.1175/jas-d-11-0212.1 |
op_relation |
Journal of the Atmospheric Sciences, 2012; 69(6):2061-2082 0022-4928 1520-0469 http://hdl.handle.net/2440/94905 doi:10.1175/JAS-D-11-0212.1 Klekociuk, A. [0000-0003-3335-0034] |
op_rights |
© 2012 American Meteorological Society |
op_doi |
https://doi.org/10.1175/JAS-D-11-0212.110.1175/jas-d-11-0212.1 |
container_title |
Journal of the Atmospheric Sciences |
container_volume |
69 |
container_issue |
6 |
container_start_page |
2061 |
op_container_end_page |
2082 |
_version_ |
1785587067501150208 |