Polar patches observed by ESR and their possible origin in the cusp region
Observations by the EISCAT Svalbard radar in summer have revealed electron density enhancements in the magnetic noon sector under conditions of IMF Bz southward. The features were identified as possible candidates for polar-cap patches drifting anti-Sunward with the plasma flow. Supporting measureme...
Published in: | Annales Geophysicae |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2000
|
Subjects: | |
Online Access: | https://doi.org/10.1007/s00585-000-1043-5 https://doaj.org/article/8892808ae0084224bb3c247db549e67e |
id |
ftdoajarticles:oai:doaj.org/article:8892808ae0084224bb3c247db549e67e |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:8892808ae0084224bb3c247db549e67e 2023-05-15T16:04:29+02:00 Polar patches observed by ESR and their possible origin in the cusp region A. M. Smith S. E. Pryse L. Kersley 2000-09-01T00:00:00Z https://doi.org/10.1007/s00585-000-1043-5 https://doaj.org/article/8892808ae0084224bb3c247db549e67e EN eng Copernicus Publications https://www.ann-geophys.net/18/1043/2000/angeo-18-1043-2000.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.1007/s00585-000-1043-5 0992-7689 1432-0576 https://doaj.org/article/8892808ae0084224bb3c247db549e67e Annales Geophysicae, Vol 18, Pp 1043-1053 (2000) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2000 ftdoajarticles https://doi.org/10.1007/s00585-000-1043-5 2022-12-31T00:01:03Z Observations by the EISCAT Svalbard radar in summer have revealed electron density enhancements in the magnetic noon sector under conditions of IMF Bz southward. The features were identified as possible candidates for polar-cap patches drifting anti-Sunward with the plasma flow. Supporting measurements by the EISCAT mainland radar, the CUTLASS radar and DMSP satellites, in a multi-instrument study, suggested that the origin of the structures lay upstream at lower latitudes, with the modulation in density being attributed to variability in soft-particle precipitation in the cusp region. It is proposed that the variations in precipitation may be linked to changes in the location of the reconnection site at the magnetopause, which in turn results in changes in the energy distribution of the precipitating particles. Key words: Ionosphere (ionosphere-magnetosphere interactions; plasma temperature and density; polar ionosphere) Article in Journal/Newspaper EISCAT Svalbard Directory of Open Access Journals: DOAJ Articles Svalbard Annales Geophysicae 18 9 1043 1053 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 A. M. Smith S. E. Pryse L. Kersley Polar patches observed by ESR and their possible origin in the cusp region |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
Observations by the EISCAT Svalbard radar in summer have revealed electron density enhancements in the magnetic noon sector under conditions of IMF Bz southward. The features were identified as possible candidates for polar-cap patches drifting anti-Sunward with the plasma flow. Supporting measurements by the EISCAT mainland radar, the CUTLASS radar and DMSP satellites, in a multi-instrument study, suggested that the origin of the structures lay upstream at lower latitudes, with the modulation in density being attributed to variability in soft-particle precipitation in the cusp region. It is proposed that the variations in precipitation may be linked to changes in the location of the reconnection site at the magnetopause, which in turn results in changes in the energy distribution of the precipitating particles. Key words: Ionosphere (ionosphere-magnetosphere interactions; plasma temperature and density; polar ionosphere) |
format |
Article in Journal/Newspaper |
author |
A. M. Smith S. E. Pryse L. Kersley |
author_facet |
A. M. Smith S. E. Pryse L. Kersley |
author_sort |
A. M. Smith |
title |
Polar patches observed by ESR and their possible origin in the cusp region |
title_short |
Polar patches observed by ESR and their possible origin in the cusp region |
title_full |
Polar patches observed by ESR and their possible origin in the cusp region |
title_fullStr |
Polar patches observed by ESR and their possible origin in the cusp region |
title_full_unstemmed |
Polar patches observed by ESR and their possible origin in the cusp region |
title_sort |
polar patches observed by esr and their possible origin in the cusp region |
publisher |
Copernicus Publications |
publishDate |
2000 |
url |
https://doi.org/10.1007/s00585-000-1043-5 https://doaj.org/article/8892808ae0084224bb3c247db549e67e |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
op_source |
Annales Geophysicae, Vol 18, Pp 1043-1053 (2000) |
op_relation |
https://www.ann-geophys.net/18/1043/2000/angeo-18-1043-2000.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.1007/s00585-000-1043-5 0992-7689 1432-0576 https://doaj.org/article/8892808ae0084224bb3c247db549e67e |
op_doi |
https://doi.org/10.1007/s00585-000-1043-5 |
container_title |
Annales Geophysicae |
container_volume |
18 |
container_issue |
9 |
container_start_page |
1043 |
op_container_end_page |
1053 |
_version_ |
1766400075282513920 |