supported by the National Basic Research Program of China (973 Program,Grant No.2012CB957801);the National Natural Science Foundation of China (Grant Nos.41074132,41274193,41674166,41031064 and 11303017);the National Standard Research Program (Grant No.200710123);the project 985 of Nanjing University,the Advanced Discipline Construction Project of Jiangsu Province and the NKBRSF (Grant No.2014CB744203)
The intensity-time profiles of solar proton events(SPEs) are grouped into three types in the present study. The Type-I means that the intensity-time profile of an SPE has one peak, which occurs shortly after the ass...
supported by the National Basic Research Program of China(2012CB957801)
Short-term variations of the solar mean magnetic field(SMMF) were investigated through re-analyzing the data from the Wilcox Solar Observatory during the last four solar activity cycles using continuous wavelet transf...
Supported by the National Natural Science Foundation of China (Grant Nos. 41074132, 41274193, 40931056 and 41031064);the National Basic Research Program of China (973 Program, Grant Nos. 2012CB957801 and 2011CB811406);the National Standard Research Program (Grant No. 10-123);the program SOA Key Laboratory for Polar Science, Polar Research Institute of China (Grant No. KP201206)
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 in...
supported by the National Basic Research Program of China (973 Program, Grant Nos. 2012CB957801 and 2011CB811406);the National Natural Science Foundation of China (Grant Nos. 41074132, 41274193 and 40931056);the National Standard Research Program (Grant No. 10-123)
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 D...
National Natural Science Foundation of China (Grant Nos. 10873032,10921303,11073010 and 40636031);National Basic Research Program of China (973 pro-grams,2011CB811406 and 2012CB957801)
The daily sunspot numbers of the whole disk as well as the northern and southern hemispheres from 1945 January 1 to 2010 December 31 are used to investi- gate the temporal variation of rotational cycle length through ...