The ionospheric signature of transient dayside reconnection and the associated pulsed convection return flow

Three SuperDARN coherent HF radars are employed to investigate the excitation of convection in the dayside high-latitude ionosphere in response to transient reconnection occurring in the cusp region. This study demonstrates the existence of transient antisunward-propagating backscatter features at t...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	S. E. Milan [verfasserIn] M. Lester [verfasserIn] R. A. Greenwald [verfasserIn] G. Sofko [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	1999

Übergeordnetes Werk:	In: Annales Geophysicae - Copernicus Publications, 2002, 17(1999), Seite 1166-1171
Übergeordnetes Werk:	volume:17 ; year:1999 ; pages:1166-1171

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc Journal toc

DOI / URN:	10.1007/s00585-999-1166-2

Katalog-ID:	DOAJ001924338

Internformat


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520			\|a Three SuperDARN coherent HF radars are employed to investigate the excitation of convection in the dayside high-latitude ionosphere in response to transient reconnection occurring in the cusp region. This study demonstrates the existence of transient antisunward-propagating backscatter features at the expected location of the ionospheric footprint of the cusp region, which have a repetition rate near 10 min. These are interpreted as the ionospheric signature of flux transfer events. Moreover, transient sunward-propagating regions of backscatter are observed in the convection return flow regions of both the pre- and post-noon sectors. These patches are observed to propagate towards the noon sector from at least as far around the auroral zone as 07 MLT in the pre-noon sector and 17 MLT in the post-noon sector, travelling with a velocity of approximately 1.5 to 2 km s<sup<-1</sup<. These return flow patches have a repetition rate similar to that of the transient features observed at local noon. While providing supporting evidence for the impulsive nature of convection flow, the observation of sunward-propagating features in the return flow region is not consistent with current conceptual models of the excitation of convection.<br<<br<<b<Key words. </b<Ionosphere (plasma convection) · Magnetospheric physics (magnetopause · cusp · and boundary layers; magnetosphere-ionosphere interactions)
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matchkey_str	article:14320576:1999----::hinshrcintrotasetasdrcnetoadhascae
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allfields	10.1007/s00585-999-1166-2 doi (DE-627)DOAJ001924338 (DE-599)DOAJ87f0bc2ebea44e3ea9b86e6ca7ab4a13 DE-627 ger DE-627 rakwb eng QC1-999 QC801-809 S. E. Milan verfasserin aut The ionospheric signature of transient dayside reconnection and the associated pulsed convection return flow 1999 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Three SuperDARN coherent HF radars are employed to investigate the excitation of convection in the dayside high-latitude ionosphere in response to transient reconnection occurring in the cusp region. This study demonstrates the existence of transient antisunward-propagating backscatter features at the expected location of the ionospheric footprint of the cusp region, which have a repetition rate near 10 min. These are interpreted as the ionospheric signature of flux transfer events. Moreover, transient sunward-propagating regions of backscatter are observed in the convection return flow regions of both the pre- and post-noon sectors. These patches are observed to propagate towards the noon sector from at least as far around the auroral zone as 07 MLT in the pre-noon sector and 17 MLT in the post-noon sector, travelling with a velocity of approximately 1.5 to 2 km s<sup<-1</sup<. These return flow patches have a repetition rate similar to that of the transient features observed at local noon. While providing supporting evidence for the impulsive nature of convection flow, the observation of sunward-propagating features in the return flow region is not consistent with current conceptual models of the excitation of convection.<br<<br<<b<Key words. </b<Ionosphere (plasma convection) · Magnetospheric physics (magnetopause · cusp · and boundary layers; magnetosphere-ionosphere interactions) Science Q Physics Geophysics. Cosmic physics M. Lester verfasserin aut R. A. Greenwald verfasserin aut G. Sofko verfasserin aut In Annales Geophysicae Copernicus Publications, 2002 17(1999), Seite 1166-1171 (DE-627)25338981X (DE-600)1458425-6 14320576 nnns volume:17 year:1999 pages:1166-1171 https://doi.org/10.1007/s00585-999-1166-2 kostenfrei https://doaj.org/article/87f0bc2ebea44e3ea9b86e6ca7ab4a13 kostenfrei https://www.ann-geophys.net/17/1166/1999/angeo-17-1166-1999.pdf kostenfrei https://doaj.org/toc/0992-7689 Journal toc kostenfrei https://doaj.org/toc/1432-0576 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2014 GBV_ILN_2048 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 17 1999 1166-1171
spelling	10.1007/s00585-999-1166-2 doi (DE-627)DOAJ001924338 (DE-599)DOAJ87f0bc2ebea44e3ea9b86e6ca7ab4a13 DE-627 ger DE-627 rakwb eng QC1-999 QC801-809 S. E. Milan verfasserin aut The ionospheric signature of transient dayside reconnection and the associated pulsed convection return flow 1999 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Three SuperDARN coherent HF radars are employed to investigate the excitation of convection in the dayside high-latitude ionosphere in response to transient reconnection occurring in the cusp region. This study demonstrates the existence of transient antisunward-propagating backscatter features at the expected location of the ionospheric footprint of the cusp region, which have a repetition rate near 10 min. These are interpreted as the ionospheric signature of flux transfer events. Moreover, transient sunward-propagating regions of backscatter are observed in the convection return flow regions of both the pre- and post-noon sectors. These patches are observed to propagate towards the noon sector from at least as far around the auroral zone as 07 MLT in the pre-noon sector and 17 MLT in the post-noon sector, travelling with a velocity of approximately 1.5 to 2 km s<sup<-1</sup<. These return flow patches have a repetition rate similar to that of the transient features observed at local noon. While providing supporting evidence for the impulsive nature of convection flow, the observation of sunward-propagating features in the return flow region is not consistent with current conceptual models of the excitation of convection.<br<<br<<b<Key words. </b<Ionosphere (plasma convection) · Magnetospheric physics (magnetopause · cusp · and boundary layers; magnetosphere-ionosphere interactions) Science Q Physics Geophysics. Cosmic physics M. Lester verfasserin aut R. A. Greenwald verfasserin aut G. Sofko verfasserin aut In Annales Geophysicae Copernicus Publications, 2002 17(1999), Seite 1166-1171 (DE-627)25338981X (DE-600)1458425-6 14320576 nnns volume:17 year:1999 pages:1166-1171 https://doi.org/10.1007/s00585-999-1166-2 kostenfrei https://doaj.org/article/87f0bc2ebea44e3ea9b86e6ca7ab4a13 kostenfrei https://www.ann-geophys.net/17/1166/1999/angeo-17-1166-1999.pdf kostenfrei https://doaj.org/toc/0992-7689 Journal toc kostenfrei https://doaj.org/toc/1432-0576 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2014 GBV_ILN_2048 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 17 1999 1166-1171
allfields_unstemmed	10.1007/s00585-999-1166-2 doi (DE-627)DOAJ001924338 (DE-599)DOAJ87f0bc2ebea44e3ea9b86e6ca7ab4a13 DE-627 ger DE-627 rakwb eng QC1-999 QC801-809 S. E. Milan verfasserin aut The ionospheric signature of transient dayside reconnection and the associated pulsed convection return flow 1999 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Three SuperDARN coherent HF radars are employed to investigate the excitation of convection in the dayside high-latitude ionosphere in response to transient reconnection occurring in the cusp region. This study demonstrates the existence of transient antisunward-propagating backscatter features at the expected location of the ionospheric footprint of the cusp region, which have a repetition rate near 10 min. These are interpreted as the ionospheric signature of flux transfer events. Moreover, transient sunward-propagating regions of backscatter are observed in the convection return flow regions of both the pre- and post-noon sectors. These patches are observed to propagate towards the noon sector from at least as far around the auroral zone as 07 MLT in the pre-noon sector and 17 MLT in the post-noon sector, travelling with a velocity of approximately 1.5 to 2 km s<sup<-1</sup<. These return flow patches have a repetition rate similar to that of the transient features observed at local noon. While providing supporting evidence for the impulsive nature of convection flow, the observation of sunward-propagating features in the return flow region is not consistent with current conceptual models of the excitation of convection.<br<<br<<b<Key words. </b<Ionosphere (plasma convection) · Magnetospheric physics (magnetopause · cusp · and boundary layers; magnetosphere-ionosphere interactions) Science Q Physics Geophysics. Cosmic physics M. Lester verfasserin aut R. A. Greenwald verfasserin aut G. Sofko verfasserin aut In Annales Geophysicae Copernicus Publications, 2002 17(1999), Seite 1166-1171 (DE-627)25338981X (DE-600)1458425-6 14320576 nnns volume:17 year:1999 pages:1166-1171 https://doi.org/10.1007/s00585-999-1166-2 kostenfrei https://doaj.org/article/87f0bc2ebea44e3ea9b86e6ca7ab4a13 kostenfrei https://www.ann-geophys.net/17/1166/1999/angeo-17-1166-1999.pdf kostenfrei https://doaj.org/toc/0992-7689 Journal toc kostenfrei https://doaj.org/toc/1432-0576 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2014 GBV_ILN_2048 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 17 1999 1166-1171
allfieldsGer	10.1007/s00585-999-1166-2 doi (DE-627)DOAJ001924338 (DE-599)DOAJ87f0bc2ebea44e3ea9b86e6ca7ab4a13 DE-627 ger DE-627 rakwb eng QC1-999 QC801-809 S. E. Milan verfasserin aut The ionospheric signature of transient dayside reconnection and the associated pulsed convection return flow 1999 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Three SuperDARN coherent HF radars are employed to investigate the excitation of convection in the dayside high-latitude ionosphere in response to transient reconnection occurring in the cusp region. This study demonstrates the existence of transient antisunward-propagating backscatter features at the expected location of the ionospheric footprint of the cusp region, which have a repetition rate near 10 min. These are interpreted as the ionospheric signature of flux transfer events. Moreover, transient sunward-propagating regions of backscatter are observed in the convection return flow regions of both the pre- and post-noon sectors. These patches are observed to propagate towards the noon sector from at least as far around the auroral zone as 07 MLT in the pre-noon sector and 17 MLT in the post-noon sector, travelling with a velocity of approximately 1.5 to 2 km s<sup<-1</sup<. These return flow patches have a repetition rate similar to that of the transient features observed at local noon. While providing supporting evidence for the impulsive nature of convection flow, the observation of sunward-propagating features in the return flow region is not consistent with current conceptual models of the excitation of convection.<br<<br<<b<Key words. </b<Ionosphere (plasma convection) · Magnetospheric physics (magnetopause · cusp · and boundary layers; magnetosphere-ionosphere interactions) Science Q Physics Geophysics. Cosmic physics M. Lester verfasserin aut R. A. Greenwald verfasserin aut G. Sofko verfasserin aut In Annales Geophysicae Copernicus Publications, 2002 17(1999), Seite 1166-1171 (DE-627)25338981X (DE-600)1458425-6 14320576 nnns volume:17 year:1999 pages:1166-1171 https://doi.org/10.1007/s00585-999-1166-2 kostenfrei https://doaj.org/article/87f0bc2ebea44e3ea9b86e6ca7ab4a13 kostenfrei https://www.ann-geophys.net/17/1166/1999/angeo-17-1166-1999.pdf kostenfrei https://doaj.org/toc/0992-7689 Journal toc kostenfrei https://doaj.org/toc/1432-0576 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2014 GBV_ILN_2048 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 17 1999 1166-1171
allfieldsSound	10.1007/s00585-999-1166-2 doi (DE-627)DOAJ001924338 (DE-599)DOAJ87f0bc2ebea44e3ea9b86e6ca7ab4a13 DE-627 ger DE-627 rakwb eng QC1-999 QC801-809 S. E. Milan verfasserin aut The ionospheric signature of transient dayside reconnection and the associated pulsed convection return flow 1999 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Three SuperDARN coherent HF radars are employed to investigate the excitation of convection in the dayside high-latitude ionosphere in response to transient reconnection occurring in the cusp region. This study demonstrates the existence of transient antisunward-propagating backscatter features at the expected location of the ionospheric footprint of the cusp region, which have a repetition rate near 10 min. These are interpreted as the ionospheric signature of flux transfer events. Moreover, transient sunward-propagating regions of backscatter are observed in the convection return flow regions of both the pre- and post-noon sectors. These patches are observed to propagate towards the noon sector from at least as far around the auroral zone as 07 MLT in the pre-noon sector and 17 MLT in the post-noon sector, travelling with a velocity of approximately 1.5 to 2 km s<sup<-1</sup<. These return flow patches have a repetition rate similar to that of the transient features observed at local noon. While providing supporting evidence for the impulsive nature of convection flow, the observation of sunward-propagating features in the return flow region is not consistent with current conceptual models of the excitation of convection.<br<<br<<b<Key words. </b<Ionosphere (plasma convection) · Magnetospheric physics (magnetopause · cusp · and boundary layers; magnetosphere-ionosphere interactions) Science Q Physics Geophysics. Cosmic physics M. Lester verfasserin aut R. A. Greenwald verfasserin aut G. Sofko verfasserin aut In Annales Geophysicae Copernicus Publications, 2002 17(1999), Seite 1166-1171 (DE-627)25338981X (DE-600)1458425-6 14320576 nnns volume:17 year:1999 pages:1166-1171 https://doi.org/10.1007/s00585-999-1166-2 kostenfrei https://doaj.org/article/87f0bc2ebea44e3ea9b86e6ca7ab4a13 kostenfrei https://www.ann-geophys.net/17/1166/1999/angeo-17-1166-1999.pdf kostenfrei https://doaj.org/toc/0992-7689 Journal toc kostenfrei https://doaj.org/toc/1432-0576 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2014 GBV_ILN_2048 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 17 1999 1166-1171
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callnumber-first	Q - Science
author	S. E. Milan
spellingShingle	S. E. Milan misc QC1-999 misc QC801-809 misc Science misc Q misc Physics misc Geophysics. Cosmic physics The ionospheric signature of transient dayside reconnection and the associated pulsed convection return flow
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topic_title	QC1-999 QC801-809 The ionospheric signature of transient dayside reconnection and the associated pulsed convection return flow
topic	misc QC1-999 misc QC801-809 misc Science misc Q misc Physics misc Geophysics. Cosmic physics
topic_unstemmed	misc QC1-999 misc QC801-809 misc Science misc Q misc Physics misc Geophysics. Cosmic physics
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title	The ionospheric signature of transient dayside reconnection and the associated pulsed convection return flow
ctrlnum	(DE-627)DOAJ001924338 (DE-599)DOAJ87f0bc2ebea44e3ea9b86e6ca7ab4a13
title_full	The ionospheric signature of transient dayside reconnection and the associated pulsed convection return flow
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author_browse	S. E. Milan M. Lester R. A. Greenwald G. Sofko
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author-letter	S. E. Milan
doi_str_mv	10.1007/s00585-999-1166-2
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title_sort	ionospheric signature of transient dayside reconnection and the associated pulsed convection return flow
callnumber	QC1-999
title_auth	The ionospheric signature of transient dayside reconnection and the associated pulsed convection return flow
abstract	Three SuperDARN coherent HF radars are employed to investigate the excitation of convection in the dayside high-latitude ionosphere in response to transient reconnection occurring in the cusp region. This study demonstrates the existence of transient antisunward-propagating backscatter features at the expected location of the ionospheric footprint of the cusp region, which have a repetition rate near 10 min. These are interpreted as the ionospheric signature of flux transfer events. Moreover, transient sunward-propagating regions of backscatter are observed in the convection return flow regions of both the pre- and post-noon sectors. These patches are observed to propagate towards the noon sector from at least as far around the auroral zone as 07 MLT in the pre-noon sector and 17 MLT in the post-noon sector, travelling with a velocity of approximately 1.5 to 2 km s<sup<-1</sup<. These return flow patches have a repetition rate similar to that of the transient features observed at local noon. While providing supporting evidence for the impulsive nature of convection flow, the observation of sunward-propagating features in the return flow region is not consistent with current conceptual models of the excitation of convection.<br<<br<<b<Key words. </b<Ionosphere (plasma convection) · Magnetospheric physics (magnetopause · cusp · and boundary layers; magnetosphere-ionosphere interactions)
abstractGer	Three SuperDARN coherent HF radars are employed to investigate the excitation of convection in the dayside high-latitude ionosphere in response to transient reconnection occurring in the cusp region. This study demonstrates the existence of transient antisunward-propagating backscatter features at the expected location of the ionospheric footprint of the cusp region, which have a repetition rate near 10 min. These are interpreted as the ionospheric signature of flux transfer events. Moreover, transient sunward-propagating regions of backscatter are observed in the convection return flow regions of both the pre- and post-noon sectors. These patches are observed to propagate towards the noon sector from at least as far around the auroral zone as 07 MLT in the pre-noon sector and 17 MLT in the post-noon sector, travelling with a velocity of approximately 1.5 to 2 km s<sup<-1</sup<. These return flow patches have a repetition rate similar to that of the transient features observed at local noon. While providing supporting evidence for the impulsive nature of convection flow, the observation of sunward-propagating features in the return flow region is not consistent with current conceptual models of the excitation of convection.<br<<br<<b<Key words. </b<Ionosphere (plasma convection) · Magnetospheric physics (magnetopause · cusp · and boundary layers; magnetosphere-ionosphere interactions)
abstract_unstemmed	Three SuperDARN coherent HF radars are employed to investigate the excitation of convection in the dayside high-latitude ionosphere in response to transient reconnection occurring in the cusp region. This study demonstrates the existence of transient antisunward-propagating backscatter features at the expected location of the ionospheric footprint of the cusp region, which have a repetition rate near 10 min. These are interpreted as the ionospheric signature of flux transfer events. Moreover, transient sunward-propagating regions of backscatter are observed in the convection return flow regions of both the pre- and post-noon sectors. These patches are observed to propagate towards the noon sector from at least as far around the auroral zone as 07 MLT in the pre-noon sector and 17 MLT in the post-noon sector, travelling with a velocity of approximately 1.5 to 2 km s<sup<-1</sup<. These return flow patches have a repetition rate similar to that of the transient features observed at local noon. While providing supporting evidence for the impulsive nature of convection flow, the observation of sunward-propagating features in the return flow region is not consistent with current conceptual models of the excitation of convection.<br<<br<<b<Key words. </b<Ionosphere (plasma convection) · Magnetospheric physics (magnetopause · cusp · and boundary layers; magnetosphere-ionosphere interactions)
collection_details	GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2014 GBV_ILN_2048 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700
title_short	The ionospheric signature of transient dayside reconnection and the associated pulsed convection return flow
url	https://doi.org/10.1007/s00585-999-1166-2 https://doaj.org/article/87f0bc2ebea44e3ea9b86e6ca7ab4a13 https://www.ann-geophys.net/17/1166/1999/angeo-17-1166-1999.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576
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up_date	2024-07-03T23:05:57.070Z
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The ionospheric signature of transient dayside reconnection and the associated pulsed convection return flow

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