High-Frequency Geomagnetic Fluctuations at Auroral Oval and Polar Cap
Rapid magnetic fluctuations are known to be closely linked to the high-latitude geomagnetic activity, in particular, to geomagnetic pulsations and subtorms. Increasing amount of commercial activity in the arctic regions requires better monitoring capability and improved understanding on the effects...
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ftaaltouniv:oai:aaltodoc.aalto.fi:123456789/34009 2023-05-15T15:08:29+02:00 High-Frequency Geomagnetic Fluctuations at Auroral Oval and Polar Cap Peitso, P. Tanskanen, E. I. Pulkkinen, T. I. Mursula, K. Centre of Excellence Research on Solar Long-Term Variability and Effects, ReSoLVE Department of Electronics and Nanoengineering University of Oulu Aalto-yliopisto Aalto University 2018-08 application/pdf https://aaltodoc.aalto.fi/handle/123456789/34009 https://doi.org/10.1029/2018SW001841 en eng Space Weather Peitso , P , Tanskanen , E I , Pulkkinen , T I & Mursula , K 2018 , ' High-Frequency Geomagnetic Fluctuations at Auroral Oval and Polar Cap ' , Space Weather , vol. 16 , no. 8 , pp. 1057-1072 . https://doi.org/10.1029/2018SW001841 1542-7390 PURE UUID: b19d3696-ff34-4969-b906-e78f5b53cba8 PURE ITEMURL: https://research.aalto.fi/en/publications/b19d3696-ff34-4969-b906-e78f5b53cba8 PURE LINK: http://www.scopus.com/inward/record.url?scp=85052482488&partnerID=8YFLogxK PURE FILEURL: https://research.aalto.fi/files/27791489/ELEC_Peitso_et_al_2018_Space_Weather.pdf https://aaltodoc.aalto.fi/handle/123456789/34009 URN:NBN:fi:aalto-201809115117 doi:10.1029/2018SW001841 openAccess auroral oval Greenland polar cap seasonal variation space weather A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä 2018 ftaaltouniv https://doi.org/10.1029/2018SW001841 2023-01-18T23:57:43Z Rapid magnetic fluctuations are known to be closely linked to the high-latitude geomagnetic activity, in particular, to geomagnetic pulsations and subtorms. Increasing amount of commercial activity in the arctic regions requires better monitoring capability and improved understanding on the effects of geomagnetic hazards to infrastructure. In this study, we analyze rapid, 1-s fluctuations in Greenland. To measure high-frequency geomagnetic fluctuations in the auroral oval and polar cap, we use high time resolution data of 1 s from 12 stations covering a large latitudinal range of 64 to 84 quasi-dipole geomagnetic latitude (QDGMlat). We found out that the large magnetic field fluctuations exceeding 0.2 nT/s are observed 10–30% of the time in auroral oval latitudes, depending on the solar cycle phase and station location. The latitudinal differences are much larger in fluctuation coverage (fractional derivative rate, FDR) than in fluctuations amplitude (dH/dt). The highest |dH/dt| and FDRs at noon are observed at the northern stations from 72 to 84 QDGMlat, while in south Greenland from 72 to 65 QDGMlat, the highest |dH/dt| and FDRs are recorded at midnight. The largest differences in seasonal variation between noon and midnight are observed in the polar cap, where a summer increase is seen at noon and almost flat seasonal profile at midnight. Peer reviewed Article in Journal/Newspaper Arctic Greenland Aalto University Publication Archive (Aaltodoc) Arctic Greenland Space Weather 16 8 1057 1072 |
institution |
Open Polar |
collection |
Aalto University Publication Archive (Aaltodoc) |
op_collection_id |
ftaaltouniv |
language |
English |
topic |
auroral oval Greenland polar cap seasonal variation space weather |
spellingShingle |
auroral oval Greenland polar cap seasonal variation space weather Peitso, P. Tanskanen, E. I. Pulkkinen, T. I. Mursula, K. High-Frequency Geomagnetic Fluctuations at Auroral Oval and Polar Cap |
topic_facet |
auroral oval Greenland polar cap seasonal variation space weather |
description |
Rapid magnetic fluctuations are known to be closely linked to the high-latitude geomagnetic activity, in particular, to geomagnetic pulsations and subtorms. Increasing amount of commercial activity in the arctic regions requires better monitoring capability and improved understanding on the effects of geomagnetic hazards to infrastructure. In this study, we analyze rapid, 1-s fluctuations in Greenland. To measure high-frequency geomagnetic fluctuations in the auroral oval and polar cap, we use high time resolution data of 1 s from 12 stations covering a large latitudinal range of 64 to 84 quasi-dipole geomagnetic latitude (QDGMlat). We found out that the large magnetic field fluctuations exceeding 0.2 nT/s are observed 10–30% of the time in auroral oval latitudes, depending on the solar cycle phase and station location. The latitudinal differences are much larger in fluctuation coverage (fractional derivative rate, FDR) than in fluctuations amplitude (dH/dt). The highest |dH/dt| and FDRs at noon are observed at the northern stations from 72 to 84 QDGMlat, while in south Greenland from 72 to 65 QDGMlat, the highest |dH/dt| and FDRs are recorded at midnight. The largest differences in seasonal variation between noon and midnight are observed in the polar cap, where a summer increase is seen at noon and almost flat seasonal profile at midnight. Peer reviewed |
author2 |
Centre of Excellence Research on Solar Long-Term Variability and Effects, ReSoLVE Department of Electronics and Nanoengineering University of Oulu Aalto-yliopisto Aalto University |
format |
Article in Journal/Newspaper |
author |
Peitso, P. Tanskanen, E. I. Pulkkinen, T. I. Mursula, K. |
author_facet |
Peitso, P. Tanskanen, E. I. Pulkkinen, T. I. Mursula, K. |
author_sort |
Peitso, P. |
title |
High-Frequency Geomagnetic Fluctuations at Auroral Oval and Polar Cap |
title_short |
High-Frequency Geomagnetic Fluctuations at Auroral Oval and Polar Cap |
title_full |
High-Frequency Geomagnetic Fluctuations at Auroral Oval and Polar Cap |
title_fullStr |
High-Frequency Geomagnetic Fluctuations at Auroral Oval and Polar Cap |
title_full_unstemmed |
High-Frequency Geomagnetic Fluctuations at Auroral Oval and Polar Cap |
title_sort |
high-frequency geomagnetic fluctuations at auroral oval and polar cap |
publishDate |
2018 |
url |
https://aaltodoc.aalto.fi/handle/123456789/34009 https://doi.org/10.1029/2018SW001841 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland |
genre_facet |
Arctic Greenland |
op_relation |
Space Weather Peitso , P , Tanskanen , E I , Pulkkinen , T I & Mursula , K 2018 , ' High-Frequency Geomagnetic Fluctuations at Auroral Oval and Polar Cap ' , Space Weather , vol. 16 , no. 8 , pp. 1057-1072 . https://doi.org/10.1029/2018SW001841 1542-7390 PURE UUID: b19d3696-ff34-4969-b906-e78f5b53cba8 PURE ITEMURL: https://research.aalto.fi/en/publications/b19d3696-ff34-4969-b906-e78f5b53cba8 PURE LINK: http://www.scopus.com/inward/record.url?scp=85052482488&partnerID=8YFLogxK PURE FILEURL: https://research.aalto.fi/files/27791489/ELEC_Peitso_et_al_2018_Space_Weather.pdf https://aaltodoc.aalto.fi/handle/123456789/34009 URN:NBN:fi:aalto-201809115117 doi:10.1029/2018SW001841 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1029/2018SW001841 |
container_title |
Space Weather |
container_volume |
16 |
container_issue |
8 |
container_start_page |
1057 |
op_container_end_page |
1072 |
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1766339837165568000 |