Conjugate features of daytime absorption associated with specific changes in the solar wind observed by inter-hemispheric high-latitude imaging riometers
Imaging riometers at Ny-Alesund (NYA) and Danmarkshavn (DMH) in the Arctic and Zhongshan (ZHS) in Antarctica were used to examine conjugate features of daytime ionospheric absorption in the polar cusp/cleft for specific changes in solar wind plasma parameters and the interplanetary magnetic field (I...
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Solar-Terrestrial Environment Laboratory, Nagoya University/National Institute of Polar Research/National Institute of Polar Research/Polar Research Institute of China/Wuhan University/Danish Meteorological Institute/The University of Oslo
2000
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ftnipr:oai:nipr.repo.nii.ac.jp:00006305 2023-05-15T13:57:48+02:00 Conjugate features of daytime absorption associated with specific changes in the solar wind observed by inter-hemispheric high-latitude imaging riometers Masanori Nishino Hisao Yamagishi Natsuo Sato Ruiyuan Liu Hongquao Hu Peter Stauning Jan A. Holtet 2000-08 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6305 http://id.nii.ac.jp/1291/00006305/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6305&item_no=1&attribute_id=18&file_no=1 en eng Solar-Terrestrial Environment Laboratory, Nagoya University/National Institute of Polar Research/National Institute of Polar Research/Polar Research Institute of China/Wuhan University/Danish Meteorological Institute/The University of Oslo National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6305 http://id.nii.ac.jp/1291/00006305/ AA11397422 Advances in polar upper atmosphere research, 14, 76-92(2000-08) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6305&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 2000 ftnipr 2023-03-18T20:23:29Z Imaging riometers at Ny-Alesund (NYA) and Danmarkshavn (DMH) in the Arctic and Zhongshan (ZHS) in Antarctica were used to examine conjugate features of daytime ionospheric absorption in the polar cusp/cleft for specific changes in solar wind plasma parameters and the interplanetary magnetic field (IMF). We observed absorption spikes in the afternoon (1300-1500 MLT) associated with a steep increase in the high solar wind dynamic pressure and a synchronized spike-type IMF excursion. Afternoon absorption was identified between the stations at NYA and ZHS. The absorption extended longitudinally over a few hundred km, in a narrow arc about 50 km wide in latitude. Magnetic field compression associated with the steep pressure increase may stimulate substorm electrons drifting eastward from the nightside magnetosphere through the inner edge of the LLBL. We also observed absorption spikes around noon that were associated with a sudden pressure increase and a synchronized IMF excursion after a prolonged quiet state. The noon absorption was identified simultaneously at the DMH and ZHS inter-hemispheric stations. It extended longitudinally for several hundred km, including a small gap of about 50 km, and for over 400 km wide in latitude. Magnetic field compression associated with the sudden pressure increase may stimulate a population of magnetospheric electrons located at the equatorward boundary of the cusp/cleft. Report Antarc* Antarctica Arctic Danmarkshavn Advances in polar upper atmosphere research National Institute of Polar Research Repository, Japan Arctic Danmarkshavn ENVELOPE(-18.667,-18.667,76.767,76.767) Zhongshan ENVELOPE(76.371,76.371,-69.373,-69.373) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Imaging riometers at Ny-Alesund (NYA) and Danmarkshavn (DMH) in the Arctic and Zhongshan (ZHS) in Antarctica were used to examine conjugate features of daytime ionospheric absorption in the polar cusp/cleft for specific changes in solar wind plasma parameters and the interplanetary magnetic field (IMF). We observed absorption spikes in the afternoon (1300-1500 MLT) associated with a steep increase in the high solar wind dynamic pressure and a synchronized spike-type IMF excursion. Afternoon absorption was identified between the stations at NYA and ZHS. The absorption extended longitudinally over a few hundred km, in a narrow arc about 50 km wide in latitude. Magnetic field compression associated with the steep pressure increase may stimulate substorm electrons drifting eastward from the nightside magnetosphere through the inner edge of the LLBL. We also observed absorption spikes around noon that were associated with a sudden pressure increase and a synchronized IMF excursion after a prolonged quiet state. The noon absorption was identified simultaneously at the DMH and ZHS inter-hemispheric stations. It extended longitudinally for several hundred km, including a small gap of about 50 km, and for over 400 km wide in latitude. Magnetic field compression associated with the sudden pressure increase may stimulate a population of magnetospheric electrons located at the equatorward boundary of the cusp/cleft. |
format |
Report |
author |
Masanori Nishino Hisao Yamagishi Natsuo Sato Ruiyuan Liu Hongquao Hu Peter Stauning Jan A. Holtet |
spellingShingle |
Masanori Nishino Hisao Yamagishi Natsuo Sato Ruiyuan Liu Hongquao Hu Peter Stauning Jan A. Holtet Conjugate features of daytime absorption associated with specific changes in the solar wind observed by inter-hemispheric high-latitude imaging riometers |
author_facet |
Masanori Nishino Hisao Yamagishi Natsuo Sato Ruiyuan Liu Hongquao Hu Peter Stauning Jan A. Holtet |
author_sort |
Masanori Nishino |
title |
Conjugate features of daytime absorption associated with specific changes in the solar wind observed by inter-hemispheric high-latitude imaging riometers |
title_short |
Conjugate features of daytime absorption associated with specific changes in the solar wind observed by inter-hemispheric high-latitude imaging riometers |
title_full |
Conjugate features of daytime absorption associated with specific changes in the solar wind observed by inter-hemispheric high-latitude imaging riometers |
title_fullStr |
Conjugate features of daytime absorption associated with specific changes in the solar wind observed by inter-hemispheric high-latitude imaging riometers |
title_full_unstemmed |
Conjugate features of daytime absorption associated with specific changes in the solar wind observed by inter-hemispheric high-latitude imaging riometers |
title_sort |
conjugate features of daytime absorption associated with specific changes in the solar wind observed by inter-hemispheric high-latitude imaging riometers |
publisher |
Solar-Terrestrial Environment Laboratory, Nagoya University/National Institute of Polar Research/National Institute of Polar Research/Polar Research Institute of China/Wuhan University/Danish Meteorological Institute/The University of Oslo |
publishDate |
2000 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6305 http://id.nii.ac.jp/1291/00006305/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6305&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(-18.667,-18.667,76.767,76.767) ENVELOPE(76.371,76.371,-69.373,-69.373) |
geographic |
Arctic Danmarkshavn Zhongshan |
geographic_facet |
Arctic Danmarkshavn Zhongshan |
genre |
Antarc* Antarctica Arctic Danmarkshavn Advances in polar upper atmosphere research |
genre_facet |
Antarc* Antarctica Arctic Danmarkshavn Advances in polar upper atmosphere research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6305 http://id.nii.ac.jp/1291/00006305/ AA11397422 Advances in polar upper atmosphere research, 14, 76-92(2000-08) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6305&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766265685060616192 |