Eintrag weiter verarbeiten
Statistical study of inverted-V structures in FAST data
Gespeichert in:
| Zeitschriftentitel: | Annales Geophysicae |
|---|---|
| Personen und Körperschaften: | , , |
| In: | Annales Geophysicae, 26, 2008, 6, S. 1439-1449 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Copernicus GmbH
|
| Schlagwörter: |
| author_facet |
Partamies, N. Donovan, E. Knudsen, D. Partamies, N. Donovan, E. Knudsen, D. |
|---|---|
| author |
Partamies, N. Donovan, E. Knudsen, D. |
| spellingShingle |
Partamies, N. Donovan, E. Knudsen, D. Annales Geophysicae Statistical study of inverted-V structures in FAST data Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Geology Astronomy and Astrophysics |
| author_sort |
partamies, n. |
| spelling |
Partamies, N. Donovan, E. Knudsen, D. 1432-0576 Copernicus GmbH Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Geology Astronomy and Astrophysics http://dx.doi.org/10.5194/angeo-26-1439-2008 <jats:p>Abstract. Since the 1970s the inverted-V structures have been observed in the satellite-borne particle data. These Λ-shaped enhancements of the differential energy flux on the high energy channels on the top of low number flux on the lower energies are traces of auroral particle acceleration by U-shaped potential drops along the field lines within the auroral zones. In this study, we show the results of a statistical study of inverted-V events in five years (1997–2001) of the Fast Auroral SnapshoT (FAST) electron spectrograms. We found 588 well-defined events in total, but the statistical results are also shown for a subset of 97 very best events. The statistical analysis shows that the inverted-V's mainly occur within the auroral oval latitudes (65°–75° invariant latitude), in the pre-midnight sector (21–23 magnetic local time) and during the Northern Hemisphere winter months (November to February). The typical maximum energies of the inverted-V's are 2–4 keV, when a threshold value of 0.3 keV is used as a selection criterion. This corresponds to an acceleration potential drop of a few kV. The typical peak energy tends to increase towards the magnetic midnight. Most of the inverted-V events occur during magnetically quiet or moderate activity, Kp 1–4. The usual width of an inverted-V varies from 20 to 40 km and is comparable to the peak value of the typical meso-scale auroral arc width of 10–20 km. Furthermore, the polar cap potential values estimated from the SuperDARN radar data are always at least three times larger than the inverted-V acceleration potential drop. </jats:p> Statistical study of inverted-V structures in FAST data Annales Geophysicae |
| doi_str_mv |
10.5194/angeo-26-1439-2008 |
| facet_avail |
Online Free |
| finc_class_facet |
Physik Technik Geologie und Paläontologie Geographie |
| format |
ElectronicArticle |
| fullrecord |
blob:ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuNTE5NC9hbmdlby0yNi0xNDM5LTIwMDg |
| id |
ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuNTE5NC9hbmdlby0yNi0xNDM5LTIwMDg |
| institution |
DE-Brt1 DE-Zwi2 DE-D161 DE-Gla1 DE-Zi4 DE-15 DE-Pl11 DE-Rs1 DE-105 DE-14 DE-Ch1 DE-L229 DE-D275 DE-Bn3 |
| imprint |
Copernicus GmbH, 2008 |
| imprint_str_mv |
Copernicus GmbH, 2008 |
| issn |
1432-0576 |
| issn_str_mv |
1432-0576 |
| language |
English |
| mega_collection |
Copernicus GmbH (CrossRef) |
| match_str |
partamies2008statisticalstudyofinvertedvstructuresinfastdata |
| publishDateSort |
2008 |
| publisher |
Copernicus GmbH |
| recordtype |
ai |
| record_format |
ai |
| series |
Annales Geophysicae |
| source_id |
49 |
| title |
Statistical study of inverted-V structures in FAST data |
| title_unstemmed |
Statistical study of inverted-V structures in FAST data |
| title_full |
Statistical study of inverted-V structures in FAST data |
| title_fullStr |
Statistical study of inverted-V structures in FAST data |
| title_full_unstemmed |
Statistical study of inverted-V structures in FAST data |
| title_short |
Statistical study of inverted-V structures in FAST data |
| title_sort |
statistical study of inverted-v structures in fast data |
| topic |
Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Geology Astronomy and Astrophysics |
| url |
http://dx.doi.org/10.5194/angeo-26-1439-2008 |
| publishDate |
2008 |
| physical |
1439-1449 |
| description |
<jats:p>Abstract. Since the 1970s the inverted-V structures have been observed in the satellite-borne particle data. These Λ-shaped enhancements of the differential energy flux on the high energy channels on the top of low number flux on the lower energies are traces of auroral particle acceleration by U-shaped potential drops along the field lines within the auroral zones. In this study, we show the results of a statistical study of inverted-V events in five years (1997–2001) of the Fast Auroral SnapshoT (FAST) electron spectrograms. We found 588 well-defined events in total, but the statistical results are also shown for a subset of 97 very best events. The statistical analysis shows that the inverted-V's mainly occur within the auroral oval latitudes (65°–75° invariant latitude), in the pre-midnight sector (21–23 magnetic local time) and during the Northern Hemisphere winter months (November to February). The typical maximum energies of the inverted-V's are 2–4 keV, when a threshold value of 0.3 keV is used as a selection criterion. This corresponds to an acceleration potential drop of a few kV. The typical peak energy tends to increase towards the magnetic midnight. Most of the inverted-V events occur during magnetically quiet or moderate activity, Kp 1–4. The usual width of an inverted-V varies from 20 to 40 km and is comparable to the peak value of the typical meso-scale auroral arc width of 10–20 km. Furthermore, the polar cap potential values estimated from the SuperDARN radar data are always at least three times larger than the inverted-V acceleration potential drop.
</jats:p> |
| container_issue |
6 |
| container_start_page |
1439 |
| container_title |
Annales Geophysicae |
| container_volume |
26 |
| format_de105 |
Article, E-Article |
| format_de14 |
Article, E-Article |
| format_de15 |
Article, E-Article |
| format_de520 |
Article, E-Article |
| format_de540 |
Article, E-Article |
| format_dech1 |
Article, E-Article |
| format_ded117 |
Article, E-Article |
| format_degla1 |
E-Article |
| format_del152 |
Buch |
| format_del189 |
Article, E-Article |
| format_dezi4 |
Article |
| format_dezwi2 |
Article, E-Article |
| format_finc |
Article, E-Article |
| format_nrw |
Article, E-Article |
| _version_ |
1792348950417637380 |
| geogr_code |
not assigned |
| last_indexed |
2024-03-01T18:18:58.118Z |
| geogr_code_person |
not assigned |
| openURL |
url_ver=Z39.88-2004&ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fvufind.svn.sourceforge.net%3Agenerator&rft.title=Statistical+study+of+inverted-V+structures+in+FAST+data&rft.date=2008-06-11&genre=article&issn=1432-0576&volume=26&issue=6&spage=1439&epage=1449&pages=1439-1449&jtitle=Annales+Geophysicae&atitle=Statistical+study+of+inverted-V+structures+in+FAST+data&aulast=Knudsen&aufirst=D.&rft_id=info%3Adoi%2F10.5194%2Fangeo-26-1439-2008&rft.language%5B0%5D=eng |
| SOLR | |
| _version_ | 1792348950417637380 |
| author | Partamies, N., Donovan, E., Knudsen, D. |
| author_facet | Partamies, N., Donovan, E., Knudsen, D., Partamies, N., Donovan, E., Knudsen, D. |
| author_sort | partamies, n. |
| container_issue | 6 |
| container_start_page | 1439 |
| container_title | Annales Geophysicae |
| container_volume | 26 |
| description | <jats:p>Abstract. Since the 1970s the inverted-V structures have been observed in the satellite-borne particle data. These Λ-shaped enhancements of the differential energy flux on the high energy channels on the top of low number flux on the lower energies are traces of auroral particle acceleration by U-shaped potential drops along the field lines within the auroral zones. In this study, we show the results of a statistical study of inverted-V events in five years (1997–2001) of the Fast Auroral SnapshoT (FAST) electron spectrograms. We found 588 well-defined events in total, but the statistical results are also shown for a subset of 97 very best events. The statistical analysis shows that the inverted-V's mainly occur within the auroral oval latitudes (65°–75° invariant latitude), in the pre-midnight sector (21–23 magnetic local time) and during the Northern Hemisphere winter months (November to February). The typical maximum energies of the inverted-V's are 2–4 keV, when a threshold value of 0.3 keV is used as a selection criterion. This corresponds to an acceleration potential drop of a few kV. The typical peak energy tends to increase towards the magnetic midnight. Most of the inverted-V events occur during magnetically quiet or moderate activity, Kp 1–4. The usual width of an inverted-V varies from 20 to 40 km and is comparable to the peak value of the typical meso-scale auroral arc width of 10–20 km. Furthermore, the polar cap potential values estimated from the SuperDARN radar data are always at least three times larger than the inverted-V acceleration potential drop. </jats:p> |
| doi_str_mv | 10.5194/angeo-26-1439-2008 |
| facet_avail | Online, Free |
| finc_class_facet | Physik, Technik, Geologie und Paläontologie, Geographie |
| format | ElectronicArticle |
| format_de105 | Article, E-Article |
| format_de14 | Article, E-Article |
| format_de15 | Article, E-Article |
| format_de520 | Article, E-Article |
| format_de540 | Article, E-Article |
| format_dech1 | Article, E-Article |
| format_ded117 | Article, E-Article |
| format_degla1 | E-Article |
| format_del152 | Buch |
| format_del189 | Article, E-Article |
| format_dezi4 | Article |
| format_dezwi2 | Article, E-Article |
| format_finc | Article, E-Article |
| format_nrw | Article, E-Article |
| geogr_code | not assigned |
| geogr_code_person | not assigned |
| id | ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuNTE5NC9hbmdlby0yNi0xNDM5LTIwMDg |
| imprint | Copernicus GmbH, 2008 |
| imprint_str_mv | Copernicus GmbH, 2008 |
| institution | DE-Brt1, DE-Zwi2, DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229, DE-D275, DE-Bn3 |
| issn | 1432-0576 |
| issn_str_mv | 1432-0576 |
| language | English |
| last_indexed | 2024-03-01T18:18:58.118Z |
| match_str | partamies2008statisticalstudyofinvertedvstructuresinfastdata |
| mega_collection | Copernicus GmbH (CrossRef) |
| physical | 1439-1449 |
| publishDate | 2008 |
| publishDateSort | 2008 |
| publisher | Copernicus GmbH |
| record_format | ai |
| recordtype | ai |
| series | Annales Geophysicae |
| source_id | 49 |
| spelling | Partamies, N. Donovan, E. Knudsen, D. 1432-0576 Copernicus GmbH Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Geology Astronomy and Astrophysics http://dx.doi.org/10.5194/angeo-26-1439-2008 <jats:p>Abstract. Since the 1970s the inverted-V structures have been observed in the satellite-borne particle data. These Λ-shaped enhancements of the differential energy flux on the high energy channels on the top of low number flux on the lower energies are traces of auroral particle acceleration by U-shaped potential drops along the field lines within the auroral zones. In this study, we show the results of a statistical study of inverted-V events in five years (1997–2001) of the Fast Auroral SnapshoT (FAST) electron spectrograms. We found 588 well-defined events in total, but the statistical results are also shown for a subset of 97 very best events. The statistical analysis shows that the inverted-V's mainly occur within the auroral oval latitudes (65°–75° invariant latitude), in the pre-midnight sector (21–23 magnetic local time) and during the Northern Hemisphere winter months (November to February). The typical maximum energies of the inverted-V's are 2–4 keV, when a threshold value of 0.3 keV is used as a selection criterion. This corresponds to an acceleration potential drop of a few kV. The typical peak energy tends to increase towards the magnetic midnight. Most of the inverted-V events occur during magnetically quiet or moderate activity, Kp 1–4. The usual width of an inverted-V varies from 20 to 40 km and is comparable to the peak value of the typical meso-scale auroral arc width of 10–20 km. Furthermore, the polar cap potential values estimated from the SuperDARN radar data are always at least three times larger than the inverted-V acceleration potential drop. </jats:p> Statistical study of inverted-V structures in FAST data Annales Geophysicae |
| spellingShingle | Partamies, N., Donovan, E., Knudsen, D., Annales Geophysicae, Statistical study of inverted-V structures in FAST data, Space and Planetary Science, Earth and Planetary Sciences (miscellaneous), Atmospheric Science, Geology, Astronomy and Astrophysics |
| title | Statistical study of inverted-V structures in FAST data |
| title_full | Statistical study of inverted-V structures in FAST data |
| title_fullStr | Statistical study of inverted-V structures in FAST data |
| title_full_unstemmed | Statistical study of inverted-V structures in FAST data |
| title_short | Statistical study of inverted-V structures in FAST data |
| title_sort | statistical study of inverted-v structures in fast data |
| title_unstemmed | Statistical study of inverted-V structures in FAST data |
| topic | Space and Planetary Science, Earth and Planetary Sciences (miscellaneous), Atmospheric Science, Geology, Astronomy and Astrophysics |
| url | http://dx.doi.org/10.5194/angeo-26-1439-2008 |