Measuring global signals in the potential gradient at high latitude sites
Abstract Previous research has shown that the study of the global electrical circuit can be relevant to climate change studies, and this can be done through measurements of the potential gradient near the surface in fair weather conditions. However, potential gradient measurements can be highly vari...
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ftunivoulu:oai:oulu.fi:nbnfi-fe202103046551 2023-07-30T03:58:55+02:00 Measuring global signals in the potential gradient at high latitude sites Tacza, J. (José) Nicoll, K. A. (Keri A.) Macotela, E. L. (Edith L.) Kubicki, M. (Marek) Odzimek, A. (Anna) Manninen, J. (Jyrki) 2021 application/pdf http://urn.fi/urn:nbn:fi-fe202103046551 eng eng Frontiers Media info:eu-repo/semantics/openAccess © 2021 Tacza, Nicoll, Macotela, Kubicki, Odzimek and Manninen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. https://creativecommons.org/licenses/by/4.0/ antarctica arctic carnegie curve global electric circuit polar cap potential potential gradient info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftunivoulu 2023-07-08T19:57:39Z Abstract Previous research has shown that the study of the global electrical circuit can be relevant to climate change studies, and this can be done through measurements of the potential gradient near the surface in fair weather conditions. However, potential gradient measurements can be highly variable due to different local effects (e.g., pollution, convective processes). In order to try to minimize these effects, potential gradient measurements can be performed at remote locations where anthropogenic influences are small. In this work we present potential gradient measurements from five stations at high latitudes in the Southern and Northern Hemisphere. This is the first description of new datasets from Halley, Antarctica; and Sodankyla, Finland. The effect of the polar cap ionospheric potential can be significant at some polar stations and detailed analysis performed here demonstrates a negligible effect on the surface potential gradient at Halley and Sodankyla. New criteria for determination of fair weather conditions at snow covered sites is also reported, demonstrating that wind speeds as low as 3 m/s can loft snow particles, and that the fetch of the measurement site is an important factor in determining this threshold wind speed. Daily and seasonal analysis of the potential gradient in fair weather conditions shows great agreement with the “universal” Carnegie curve of the global electric circuit, particularly at Halley. This demonstrates that high latitude sites, at which the magnetic and solar influences can be present, can also provide globally representative measurement sites for study of the global electric circuit. Article in Journal/Newspaper Antarc* Antarctica Arctic Climate change Jultika - University of Oulu repository Arctic |
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Open Polar |
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Jultika - University of Oulu repository |
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ftunivoulu |
language |
English |
topic |
antarctica arctic carnegie curve global electric circuit polar cap potential potential gradient |
spellingShingle |
antarctica arctic carnegie curve global electric circuit polar cap potential potential gradient Tacza, J. (José) Nicoll, K. A. (Keri A.) Macotela, E. L. (Edith L.) Kubicki, M. (Marek) Odzimek, A. (Anna) Manninen, J. (Jyrki) Measuring global signals in the potential gradient at high latitude sites |
topic_facet |
antarctica arctic carnegie curve global electric circuit polar cap potential potential gradient |
description |
Abstract Previous research has shown that the study of the global electrical circuit can be relevant to climate change studies, and this can be done through measurements of the potential gradient near the surface in fair weather conditions. However, potential gradient measurements can be highly variable due to different local effects (e.g., pollution, convective processes). In order to try to minimize these effects, potential gradient measurements can be performed at remote locations where anthropogenic influences are small. In this work we present potential gradient measurements from five stations at high latitudes in the Southern and Northern Hemisphere. This is the first description of new datasets from Halley, Antarctica; and Sodankyla, Finland. The effect of the polar cap ionospheric potential can be significant at some polar stations and detailed analysis performed here demonstrates a negligible effect on the surface potential gradient at Halley and Sodankyla. New criteria for determination of fair weather conditions at snow covered sites is also reported, demonstrating that wind speeds as low as 3 m/s can loft snow particles, and that the fetch of the measurement site is an important factor in determining this threshold wind speed. Daily and seasonal analysis of the potential gradient in fair weather conditions shows great agreement with the “universal” Carnegie curve of the global electric circuit, particularly at Halley. This demonstrates that high latitude sites, at which the magnetic and solar influences can be present, can also provide globally representative measurement sites for study of the global electric circuit. |
format |
Article in Journal/Newspaper |
author |
Tacza, J. (José) Nicoll, K. A. (Keri A.) Macotela, E. L. (Edith L.) Kubicki, M. (Marek) Odzimek, A. (Anna) Manninen, J. (Jyrki) |
author_facet |
Tacza, J. (José) Nicoll, K. A. (Keri A.) Macotela, E. L. (Edith L.) Kubicki, M. (Marek) Odzimek, A. (Anna) Manninen, J. (Jyrki) |
author_sort |
Tacza, J. (José) |
title |
Measuring global signals in the potential gradient at high latitude sites |
title_short |
Measuring global signals in the potential gradient at high latitude sites |
title_full |
Measuring global signals in the potential gradient at high latitude sites |
title_fullStr |
Measuring global signals in the potential gradient at high latitude sites |
title_full_unstemmed |
Measuring global signals in the potential gradient at high latitude sites |
title_sort |
measuring global signals in the potential gradient at high latitude sites |
publisher |
Frontiers Media |
publishDate |
2021 |
url |
http://urn.fi/urn:nbn:fi-fe202103046551 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Antarc* Antarctica Arctic Climate change |
genre_facet |
Antarc* Antarctica Arctic Climate change |
op_rights |
info:eu-repo/semantics/openAccess © 2021 Tacza, Nicoll, Macotela, Kubicki, Odzimek and Manninen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. https://creativecommons.org/licenses/by/4.0/ |
_version_ |
1772809640989425664 |