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国家自然科学基金(40931056)

作品数:7 被引量:12H指数:2
相关作者:王劲松宋乔张荣楷冯学尚单海滨更多>>
相关机构:国家空间天气监测预警中心国家卫星气象中心中国气象局更多>>
发文基金:国家自然科学基金国家高技术研究发展计划国家重点基础研究发展计划更多>>
相关领域:天文地球更多>>

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7 条 记 录,以下是 1-10
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Solar cycle distribution of major geomagnetic storms被引量:2
2013年
We examine the solar cycle distribution of major geomagnetic storms (Dst ≤ -100 nT), including intense storms at the level of -200 nT〈 Dst ≤ -100 nT, great storms at -300 nT〈 Dst ≤-200 nT, and super storms at Dst ≤ -300 nT, which occurred during the period of 1957-2006, based on Dst indices and smoothed monthly sunspot numbers. Statistics show that the majority (82%) of the geomagnetic storms at the level of Dst≤ -100 nT that occurred in the study pe- riod were intense geomagnetic storms, with 12.4% ranked as great storms and 5.6% as super storms. It is interesting to note that about 27% of the geomagnetic storms that occurred at all three intensity levels appeared in the ascending phase of a solar cycle, and about 73% in the descending one. Statistics also show that 76.9% of the intense storms, 79.6% of the great storms and 90.9% of the super storms occurred during the two years before a solar cycle reached its peak, or in the three years after it. The correlation between the size of a solar cycle and the percentage of major storms that occurred, during the period from two years prior to maximum to three years af- ter it, is investigated. Finally, the properties of the multi-peak distribution for major geomagnetic storms in each solar cycle is investigated.
Gui-Ming LeZi-Yu CaiHua-Ning WangZhi-Qiang YinPeng Li
关键词:SUN
中国江淮地区夏季雨带位置的年代际变化与太阳变率的关系
太阳作为空间天气事件的源头和地球气候系统主要的能量源,其明显的周期性活动可能是影响全球重要气候事件和全球变暖的一个重要因子。随着新太阳周的到来,其研究的迫切性日益明显,而且,鉴于其巨大的潜在应用价值(包括气候预测和经济决...
赵亮王劲松
关键词:太阳活动降水年代际雨带
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Climatology of medium-scale traveling ionospheric disturbances observed by a GPS network in central China
[1]The 15-month climatology of medium-scale traveling ionospheric disturbances (MSTIDs) during a solar minimum...
Feng Ding,Weixing Wan,Guirong Xu,Tao Yu,Guanglin Yang, and Jing-song Wang 1 Beijing National Observatory of Space Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,China. 2 Institute of Heavy Rain,China Meteorological Administration, Wuhan,China. 3National Center for Space Weather,China Meteorological Administration,Beijing,China.
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Phase relationship between the relative sunspot number and solar 10.7 cm flux被引量:2
2012年
A range of analysis approaches,namely continuous wavelet,cross wavelet,and wavelet coherence analyses,are employed to clarify the phase relationship between the smoothed monthly mean sunspot number and solar 10.7 cm flux(F10.7).Analysis shows that there is a region of high spectral power sitting across the Schwabe cycle belt,where the two time series are in phase.However,analysis of the cross-wavelet transform and wavelet coherence unveils asynchronous behavior featured with phase mixing in the high-frequency components of sunspot activity and solar F10.7,which may explain the different activity properties of the photosphere and corona on a short time scale.
ZHANG XueFengLE GuiMingZHANG YanXia
关键词:太阳黑子相对数太阳黑子活动相干分析
The properties of solar active regions responsible for ground level enhancements during solar cycles 22 and 23
2013年
This is a study designed to analyze the relationship between ground level enhancements(GLEs)and their associated solar active regions during solar cycles 22and 23.Results show that 90.3%of the GLE events that are investigated are accompanied by X-class flares,and that 77.4%of the GLE events originate from super active regions.It is found that the intensity of a GLE event is strongly associated with the specific position of an active region where the GLE event occurs.As a consequence,the GLE events having a peak increase rate exceeding 50%occur in a longitudinal range from W20 to W100.Moreover,the largest GLE events occur in a heliographic longitude at roughly W60.Additionally,an analysis is made to understand the distributional pattern of the Carrington longitude of the active regions that have generated the GLE events.
Gui-Ming LePeng LiHui-Gen YangYu-Lin ChenXing-Xing YangZhi-Qiang Yin
1998年10月18—19日磁暴主相的行星际源分析被引量:1
2011年
采用高时间分辨率的地磁指数SYM-H,同时考虑日地连线引力平衡点(L1点)太阳风地磁效应的滞后性,精确分析了1998年10月18-19日大磁暴主相的行星际源.分析结果表明,磁暴主相的行星际源仅为行星际激波和行星际日冕物质抛射之间的太阳风(Sheath),磁云对磁暴主相没有贡献.这个磁暴事例的研究表明,行星际磁场南向分量与太阳风动压的乘积是影响磁暴主相发展的关键参数.
张杨乐贵明刘连光
关键词:太阳风动压磁暴
日冕物质抛射源区研究进展被引量:1
2016年
日冕物质抛射(Coronal Mass Ejection,简称CME)可在短时间内将约1011~1013千克物质抛向行星际空间,是灾害性空间天气的主要驱动源之一.CME引发的空间天气事件可能会对卫星、航空器、航天器、电网、输油管道,以及航天员、航班机组人员和乘客健康造成严重危害.CME源区研究是理解CME的重要途径.本文旨在介绍近年来CME源区观测和理论研究进展,通过综合Hinode、STEREO、SDO等卫星的最新观测结果,对CME源区的观测特征进行描述;在此基础上,对stealth CME、twin-CME、大尺度活动等概念、观测现象背后的磁场机制、磁绳的观测和模拟,新的日冕磁场外推方法、CME的三维重构等进行概述.CME预报仍是目前空间天气领域的难点之一,结合最新观测数据对CME事件及其源区、尤其是源区大尺度磁场结构进行分析,对理解和预报CME及相关的空间天气事件具有重要意义.
宋乔王劲松冯学尚
关键词:日冕物质抛射太阳耀斑太阳磁场
利用气象卫星接收设备进行电离层闪烁监测
由于电离层不规则结构引起的电离层闪烁,会导致穿越电离层的通信出现误码和信号畸变,从而影响导航和通信系统的可靠性和精度。观测研究电离层闪烁并进一步预报电离层扰动情况,是当前空间天气研究中十分重要的内容和热点之一,目前国内外...
单海滨王劲松张效信徐杰
关键词:电离层
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FY-2气象卫星信号的开发利用被引量:1
2010年
详细介绍了基于风云二号静止气象卫星信号实现电离层闪烁监测、云图接收、太空环境参数接收的设备设计、构成。该设备主要用于实时监测分析风云二号卫星信号因电离层变化而造成的幅度闪烁和相位闪烁。由于静止卫星不存在运动所附带的变化,利用其稳定的L波段遥测信号来监测电离层闪烁,优越性显著。风云卫星展宽云图接收设备目前已遍布全国,该设备在其跟踪遥测及云图接收的基础上进行开发,易于组网监测。电离层闪烁监测的结果,将对空间的探测和通讯技术的发展具有重大的意义。
张荣楷单海滨曹静杨伍琳
关键词:电离层闪烁FY-2静止气象卫星监测仪
中国气象局的空间天气业务被引量:5
2011年
"空间天气"概念的缘起与演变表明,空间天气业务必然会出现,且与其他气象业务存在天然的联系。作为中国气象事业的有机组成部分,中国气象局的空间天气业务在监测、预报、服务和科研开发等方面取得了显著的成绩。分析表明,空间天气业务要取得突破性进展,应首先在应用服务方面着力。
王劲松
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