WEKO3
アイテム
North-south asymmetry in global distribution of the solar wind speed during 1985–2013
http://hdl.handle.net/2237/24210
http://hdl.handle.net/2237/24210079683e7-6f80-4a48-bece-0804922974e1
名前 / ファイル | ライセンス | アクション |
---|---|---|
Tokumaru_et_al-2015-Journal_of_Geophysical_Research_Space_Physics.pdf (3.6 MB)
|
|
Item type | 学術雑誌論文 / Journal Article(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2016-05-27 | |||||
タイトル | ||||||
タイトル | North-south asymmetry in global distribution of the solar wind speed during 1985–2013 | |||||
言語 | en | |||||
著者 |
Tokumaru, Munetoshi
× Tokumaru, Munetoshi× Fujiki, Ken'ichi× Iju, Tomoya |
|||||
アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | ©2015. American Geophysical Union. All Rights Reserved. | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Global observations of the solar wind including high-latitude regions | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Heliospheric response to long-term change in the solar dynamo activity | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Marked north-south asymmetry of the polar solar wind and its origin | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Interplanetary scintillation (IPS) observations made between 1985 and 2013 are used to investigate the north-south (N-S) asymmetry in global distribution of the solar wind speed. The IPS observations clearly demonstrate that the global distribution of the solar wind speed systematically changes with the solar activity. This change is found to closely correlate with that in polar magnetic fields of the Sun, while fast wind data at solar minima systematically deviate from this correlation. The IPS observations show that notable N-S asymmetry of polar solar winds occurs at the solar maxima, and small but significant N-S asymmetry exists at the solar minima. The observed asymmetry at the solar maxima is consistent with the time lag in the reversal of polar magnetic fields between north and south hemispheres. We also find that significant N-S asymmetry of the polar fast wind lasts for the period between Cycles 23 and 24 solar maxima, starting from predominance of the fast wind over the north pole and ending with that over the south pole. The N-S asymmetry revealed from IPS observations is found to be generally consistent with Ulysses observations. We compare IPS observations with magnetic field data of the Sun and find that the ratio of the quadrupole to dipole coefficients exhibits a similar time variation to that of the N-S asymmetry revealed from IPS observations. This suggests that higher-order multipole moments play an important role in determining the N-S asymmetry of the solar wind when the dipole moment weakens. | |||||
言語 | en | |||||
出版者 | ||||||
出版者 | AGU publications | |||||
言語 | en | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1002/2014JA020765 | |||||
ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 2169-9380 | |||||
書誌情報 |
en : Journal of Geophysical Research: Space Physics 巻 120, 号 5, p. 3283-3296, 発行日 2015-05 |
|||||
著者版フラグ | ||||||
値 | publisher | |||||
URI | ||||||
識別子 | http://doi.org/10.1002/2014JA020765 | |||||
識別子タイプ | DOI | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2237/24210 | |||||
識別子タイプ | HDL |