Two groups of microwave type U and Reverse-Slope(RS)bursts after the Soft X-Ray(SXR)maximum were observed with the 2.6~3.8GHz spectrometer of Chinese Solar Broadband Radio Spectrometers(SBRS/Huairou)on 15 February 201...Two groups of microwave type U and Reverse-Slope(RS)bursts after the Soft X-Ray(SXR)maximum were observed with the 2.6~3.8GHz spectrometer of Chinese Solar Broadband Radio Spectrometers(SBRS/Huairou)on 15 February 2011,when an X2.2 solar flare occurred in the Active Region(AR)NOAA 11158.A Shear-driven Quadrupolar Reconnection(SQR)model was utilized to analyze these bursts and the two loops involved were found to be basically in the same spatial scale and have a height difference of about 1300 km.These bursts were interpreted to be a result of a new reconnection process between the two similar-scaled loops.展开更多
Input data of the system are two-dimensional images and one-dimensional distributions of total and polarized solar emission at 5.2 cm wavelength obtained with SSRT. Together with photoheliograms, magnetograms, Hα-fil...Input data of the system are two-dimensional images and one-dimensional distributions of total and polarized solar emission at 5.2 cm wavelength obtained with SSRT. Together with photoheliograms, magnetograms, Hα-filtergrams and characteristics of active regions received from other sources, they form the initial database. The first stage includes superimposing the images, identifying microwave sources with active regions, assigning NOAA numbers to the sources, and determining for each active region the heliolatitude, extent, and inclination angle of the group's axis to the equator. These data are used to calculate the boundaries of longitude zones for each active region. A next stage involves determining the brightness temperatures of microwave sources less than the polarization distribution, the degree of polarization, and microwave emission flux, as well as calculating the parameters of microwave sources. Each parameter is assigned its own value of the weight factor, and the sum of values is used to draw the conclusion about the flare occurrence probability in each active region and on the Sun in general.展开更多
The short term responses of 227326 lightning activities measured with LLP80-02 to 170 solar flares of importance 2 or greater over the Beijing-Tianjin-Hebei region around the summers of 1989-1994 are studied.In the re...The short term responses of 227326 lightning activities measured with LLP80-02 to 170 solar flares of importance 2 or greater over the Beijing-Tianjin-Hebei region around the summers of 1989-1994 are studied.In the region of 600×600 km 2,these are two areas of negative responses with a significance level better than 5×10 -3 .They are the Bohai Bay and the middle west of Hebei,both with a scale of several hundred kilometers.This means that the lightning activities in these areas decrease after flares.This gives rise to a new challenge to the mechanism of the effect of solar activities on the short-middle term weather and provides a new basis for further research.展开更多
基金Supported by National Basic Research Program of Ministry of Science and Technology of China(2011CB811401)the National Major Scientific Equipment Research and Development Project(ZDYZ2009-3)National Natural Science Foundation of China(11211120147,11221063,11273030,11103044,11103039,11373039)
文摘Two groups of microwave type U and Reverse-Slope(RS)bursts after the Soft X-Ray(SXR)maximum were observed with the 2.6~3.8GHz spectrometer of Chinese Solar Broadband Radio Spectrometers(SBRS/Huairou)on 15 February 2011,when an X2.2 solar flare occurred in the Active Region(AR)NOAA 11158.A Shear-driven Quadrupolar Reconnection(SQR)model was utilized to analyze these bursts and the two loops involved were found to be basically in the same spatial scale and have a height difference of about 1300 km.These bursts were interpreted to be a result of a new reconnection process between the two similar-scaled loops.
基金Supported by the Education and Science Ministry of Russian Federation (477.2003.2)Russian Federal Program "Astronomy"the China-Russia Joint Research Center on Space Weather, Chinese Academy of Sciences
文摘Input data of the system are two-dimensional images and one-dimensional distributions of total and polarized solar emission at 5.2 cm wavelength obtained with SSRT. Together with photoheliograms, magnetograms, Hα-filtergrams and characteristics of active regions received from other sources, they form the initial database. The first stage includes superimposing the images, identifying microwave sources with active regions, assigning NOAA numbers to the sources, and determining for each active region the heliolatitude, extent, and inclination angle of the group's axis to the equator. These data are used to calculate the boundaries of longitude zones for each active region. A next stage involves determining the brightness temperatures of microwave sources less than the polarization distribution, the degree of polarization, and microwave emission flux, as well as calculating the parameters of microwave sources. Each parameter is assigned its own value of the weight factor, and the sum of values is used to draw the conclusion about the flare occurrence probability in each active region and on the Sun in general.
文摘The short term responses of 227326 lightning activities measured with LLP80-02 to 170 solar flares of importance 2 or greater over the Beijing-Tianjin-Hebei region around the summers of 1989-1994 are studied.In the region of 600×600 km 2,these are two areas of negative responses with a significance level better than 5×10 -3 .They are the Bohai Bay and the middle west of Hebei,both with a scale of several hundred kilometers.This means that the lightning activities in these areas decrease after flares.This gives rise to a new challenge to the mechanism of the effect of solar activities on the short-middle term weather and provides a new basis for further research.
