日本地球惑星科学連合2015年大会

講演情報

インターナショナルセッション(口頭発表)

セッション記号 P (宇宙惑星科学) » P-EM 太陽地球系科学・宇宙電磁気学・宇宙環境

[P-EM10] Study of coupling processes in solar-terrestrial system

2015年5月27日(水) 16:15 〜 18:00 A01 (アパホテル&リゾート 東京ベイ幕張)

コンビーナ:*山本 衛(京都大学生存圏研究所)、野澤 悟徳(名古屋大学太陽地球環境研究所)、小川 泰信(国立極地研究所)、橋口 浩之(京都大学生存圏研究所)、吉川 顕正(九州大学大学院理学研究院地球惑星科学部門)、座長:野澤 悟徳(名古屋大学太陽地球環境研究所)

17:48 〜 17:51

[PEM10-P02] E-F REGION FIELD ALIGNED IRREGULARITIES OBSERVED WITH EQUATORIAL ATMOSPHERIC RADAR AND IONOSONDE

ポスター講演3分口頭発表枠

*Dyah rahayu MARTININGRUM1Mamoru YAMAMOTO1Tatsuhiro YOKOYAMA2Asnawi HUSIN3Clara yono YATINI3 (1.RISH, Kyoto University-Japan、2.NICT, Tokyo-Japan、3.Center of Space Science, LAPAN-Indonesia)

キーワード:plasma irregularities, ionosphere, E-F region, coupling

The irregular plasma density and velocity fluctuations often occur in the Earth’s ionosphere regions. When radio signals propagate through that region, they cause a fade in received signal power known as scintillation. The generation of these plasma irregularities is one of the important manifestations of space weather. Recently, research of the mechanism and the morphology of plasma irregularities has progressed. In this study, we analyzed E and F region field aligned irregularities (FAI) observed by a VHF backscatter radar with operating frequency 47 MHz have been operated at Kototabang (0.20oS, 100.32oE; dip lat 10.36oS), Indonesia. Seasonal variation of E and F region field aligned irregularities observation compared with sporadic E (Es) and equatorial spread F (ESF) occurrences observed by ionosonde. The ionosonde provide various E and F region parameters such as the critical frequency of F2 layer (foF2), the critical frequency of sporadic E layer (foEs), and the maximum height of F2 layer (hmF2). We analyzed for equinox (March, April, September, and October), June solstice (May-August), and December solstice (November-Februry) of data observations during 2011-2012. We also discussed correlation between sporadic E (Es) and equatorial spread F (ESF) occurrences to understand morphological of coupling between E and F region of the Earth’s ionosphere.