On long-term solar activity at high latitudes

	On long-term solar activity at high latitudes
	Li KJ(李可军)1; Mu J(穆军)1,2 ; Li QX(李启秀)1,2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2007-03-21
卷号	376 期号:1 页码:L39-L42
关键词	Sun : activity Sun : general Sun : magnetic fields
ISSN号	0035-8711
通讯作者	Li, KJ (reprint author), CAS, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	The interesting characteristics of long-term solar activity at high latitudes are reported as follows. (1) Two cyclic behaviours, but in anti-phase with each other, simultaneously exist at high latitudes: the magnetic fluxes in units of gauss of the line-of-sight magnetic fields at latitudes of 60 degrees-70 degrees, possibly representing the amplitude of solar magnetic activity at high latitudes, are in complete anti-phase with the solar activity at middle and low latitudes, usually represented by sunspot numbers. However, the numbers of filaments at latitudes of 60 degrees-90 degrees, possibly representing the complexity of solar magnetic activity at high latitudes, are strangely in complete anti-phase with the magnetic fluxes. (2) Two latitude migrations, but in opposite drift directions relative to each other, exist in a cycle: a poleward migration drifts from the middle latitudes toward the solar poles in the first half of a normal cycle, following an equatorward migration found from the solar poles towards the middle latitudes in the other half of the normal cycle. (3) It is inferred that polar faculae, a frequently observed phenomenon at high latitudes, are more related to the amplitude than to the complexity of solar magnetic activity at high latitudes, and they are in phase with the magnetic fluxes. (4) High-latitude flares, a violent active phenomenon at high latitudes, keep in step with neither the amplitude nor the complexity of solar magnetic activity at high latitudes; they seemingly occur just around the maximum times of both.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	ACTIVITY CYCLE
收录类别	SCI
原文出处	http://mnrasl.oxfordjournals.org/content/376/1/L39
语种	英语
WOS记录号	WOS:000244886400009
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6108]
专题	云南天文台_太阳物理研究组
作者单位	1.National Astronomical Observatories/Yunnan Observatory, CAS, Kunming 650011, China 2.School of Graduate, CAS, Beijing, China
推荐引用方式 GB/T 7714	Li KJ,Mu J,Li QX. On long-term solar activity at high latitudes[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2007,376(1):L39-L42.
APA	Li KJ,Mu J,&Li QX.(2007).On long-term solar activity at high latitudes.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,376(1),L39-L42.
MLA	Li KJ,et al."On long-term solar activity at high latitudes".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 376.1(2007):L39-L42.