지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국우주과학회 Journal of Astronomy and Space Sciences Journal of Astronomy and Space Sciences 제33권 제4호
- 발행연도
- 2016.12
- 수록면
- 273 - 278 (6page)
- DOI
- http://dx.doi.org/10.5140/JASS.2016.33.4.273
이용수
초록· 키워드
오류제보하기
December 2009 was one of the quietest (monthly Ap=2) months over the last eight decades. It provided an excellent opportunity to study the day-to-day variability of the F2 layer with the smallest contribution due to geomagnetic activity.
With this aim, we analyze hourly values of the F2-layer critical frequency (foF2) recorded at 18 ionosonde stations during the magnetically quietest (Ap=0) days of the month. The foF2 variability is quantified as the relative standard deviation of foF2 about the mean of all the “zero-Ap” days of December 2009. This case study may contribute to a more clear vision of the F2-layer variability caused by sources not linked to geomagnetic activity. In accord with previous studies, we find that there is considerable “zero-Ap” variability of foF2 all over the world. At most locations, foF2 variability is presumably affected by the passage of the solar terminator. The patterns of foF2 variability are different at different stations. Possible causes of the observed diurnal foF2 variability may be related to “meteorological” disturbances transmitted from the lower atmosphere or/and effects of the intrinsic turbulence of the ionosphere-atmosphere system.
목차
등록된 정보가 없습니다.
참고문헌 (26)
참고문헌 신청
D. N. Anderson / 1998 / Intercomparison of physical models and observations of the ionosphere / Journal of Geophysical Research: Space Physics 103(A2):2179~2192
N. Balan / 1994 / Modeling studies of ionospheric variations during an intense solar cycle / Journal of Geophysical Research 99(A9):17467~17475
Bartels J / 1963 / Discussion of time-variations of geomagnetic activity indices Kp and Ap, 1932-1961 / Ann. Geophys 19:1
Alicia L. Clúa de Gonzalez / 1993 / Periodic variation in the geomagnetic activity: A study based on the Ap index / Journal of Geophysical Research 98(A6):9215~9231
Jeffrey M. Forbes / 2000 / Variability of the ionosphere / Journal of Atmospheric and Solar-Terrestrial Physics 62(8):685~693
N. Balan / 1994 / Modeling studies of ionospheric variations during an intense solar cycle / Journal of Geophysical Research 99(A9):17467~17475
Bartels J / 1963 / Discussion of time-variations of geomagnetic activity indices Kp and Ap, 1932-1961 / Ann. Geophys 19:1
Alicia L. Clúa de Gonzalez / 1993 / Periodic variation in the geomagnetic activity: A study based on the Ap index / Journal of Geophysical Research 98(A6):9215~9231
Jeffrey M. Forbes / 2000 / Variability of the ionosphere / Journal of Atmospheric and Solar-Terrestrial Physics 62(8):685~693
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