Solar transients and their related interplanetary counterparts have severe effects on the space environments of the Earth. Therefore, the research of solar corona and interplanetary physics has become the focus of stu...Solar transients and their related interplanetary counterparts have severe effects on the space environments of the Earth. Therefore, the research of solar corona and interplanetary physics has become the focus of study for both solar and space scientists. Considerable progress has been achieved in these aspects by the solar and space physics community of China during 2012–2014, which will be given in this report. The brief report summarizes the research advances of solar corona and interplanetary physics into the following parts: solar wind origin and turbulence, coronal waves and seismology, solar eruptions, solar energetic particle and galactic cosmic ray, magnetic reconnection,Magnetohydrodynamic(MHD) models and their applications, waves and structures in solar wind,propagation of ICMEs/shocks and their arrival time predictions. These research achievements have been achieved by Chinese solar and space scientists independently or via international collaborations.展开更多
During the past two years(2016–2018), great achievements have been made in the Chinese research of interplanetary physics, with nearly 100 papers published in the academic journals. The achievements are including but...During the past two years(2016–2018), great achievements have been made in the Chinese research of interplanetary physics, with nearly 100 papers published in the academic journals. The achievements are including but not limited to the following topics: solar corona; solar wind and turbulence; filament/prominence and jets; solar flare; radio bursts; particle acceleration at coronal shocks; magnetic flux ropes; instability;instrument; Coronal Mass Ejections(CMEs) and their interplanetary counterparts; Magnetohydrodynamic(MHD) numerical modeling; solar energetic particles and cosmic rays. The progress further improves our understanding of the eruptions of solar activities, their evolutions and propagations in the heliosphere, and final geoeffects on our Earth. These results were achieved by the Chinese solar and space scientists independently or via international collaborations. This paper will give a brief review of these achievements.展开更多
Great progress has been made in the research of solar corona and interplanetary physics by the Chinese scientists during the past two years(2014—2016).Nearly 100 papers were published in this area.In this report,we w...Great progress has been made in the research of solar corona and interplanetary physics by the Chinese scientists during the past two years(2014—2016).Nearly 100 papers were published in this area.In this report,we will give a brief review to these progresses.The investigations include:solar corona,solar wind and turbulence,superhalo electron and energetic particle in the inner heliosphere,solar flares and radio bursts,Coronal Mass Ejections(CMEs) and their interplanetary counterparts,Magnetohydrodynamic(MHD) numerical modeling,CME/shock arrival time prediction,magnetic reconnection,solar variability and its impact on climate.These achievements help us to better understand the evolution of solar activities,solar eruptions,their propagations in the heliosphere,and potential geoeffectiveness.They were achieved by the Chinese solar and space scientists independently or via international collaborations.展开更多
Significant progress has been made by Chinese scientists in research of interplanetary physics during the recent two years(2018–2020).These achievements are reflected at least in the following aspects:Activities in s...Significant progress has been made by Chinese scientists in research of interplanetary physics during the recent two years(2018–2020).These achievements are reflected at least in the following aspects:Activities in solar corona and lower solar atmosphere;solar wind and turbulence;filament/prominence,jets,flares,and radio bursts;active regions and solar eruptions;coronal mass ejections and their interplanetary counterparts;other interplanetary structures;space weather prediction methods;magnetic reconnection;Magnetohydrodynamic(MHD)numerical modeling;solar energetic particles,cosmic rays,and Forbush decreases;machine learning methods in space weather and other aspects.More than one hundred and forty papers in the academic journals have been published in these research directions.These fruitful achievements are obtained by Chinese scholars in solar physics and space physics either independently or through international collaborations.They greatly improve people’s understanding of solar activities,solar eruptions,the corresponding space weather effects,and the Sun-Earth relations.Here we will give a very brief review on the research progress.However,it must be pointed out that this paper may not completely cover all achievements in this field due to our limited knowledge.展开更多
Through independent research by the Chinese scientists or their international collaborations,great achievements have been made in interplanetary physics research in China' Mainland during the past two years(2020-2...Through independent research by the Chinese scientists or their international collaborations,great achievements have been made in interplanetary physics research in China' Mainland during the past two years(2020-2022).More than 150 papers have been published in academic journals in this field during this period.These achievements can be grouped into the following areas,at least:(i)solar corona;(ii)solar and interplanetary transient phenomena;(iii)radio bursts;(iv)Magnetohydrodynamic(MHD)numerical modeling;(v)solar energetic particles and cosmic rays.These advances have greatly enriched our understanding of interplanetary physics,i.e.our knowledge of solar activities and solar eruptions,their propagation in the interplanetary space,and the corresponding geoeffects on the Earth.In the sense of application,they have also improved the forecasting of space weather.In this paper we will give a very short review about these advances.展开更多
We identified 28 discrete electron events(DEEs) with enhanced fluxes at ~50-200 keV in the high-altitude cusp/polar cap/lobe,using the electron measurements by the BeiDa Image Electron Spectrometer(BD-IES) instrument ...We identified 28 discrete electron events(DEEs) with enhanced fluxes at ~50-200 keV in the high-altitude cusp/polar cap/lobe,using the electron measurements by the BeiDa Image Electron Spectrometer(BD-IES) instrument onboard an inclined(55°)geosynchronous orbit(IGSO) satellite from October 2015 to January 2016. We find that among the 28 DEEs, 22 occur in the nightside and mostly in the northern cusp/polar cap/lobe, while 6 occur in the dayside and all in the southern cusp; 24 events correspond to an average interplanetary magnetic field(IMF) component B_z>0, 3 correspond to an average IMF B_z<0, and 1 has no OMNI IMF data. In these DEEs, the observed average omnidirectional electron differential flux generally fits well to a power-law spectrum, J^E^(-γ), with the spectral index y ranging from 2.6 to 4.6, while the average electron flux varies over three orders of magnitude from event to event. The spectral index of these cusp DEEs are(strongly) larger than the spectral index of solar wind superhalo electrons(radiation belt electrons) observed by the WIND 3 D Plasma & Energetic Particle instrument(the BD-IES). At^110 keV,the electron flux of DEEs in the cusp/polar cap/lobe shows a weak positive correlation with the solar wind superhalo electron flux but no obvious correlation with the radiation belt electron flux. These results suggest that these DEEs probably originate from transient processes acting on the solar wind superhalo electrons, e.g., the mid/high-latitude reconnection.展开更多
The sun, the host star of the Earth and human beings, is still mysterious in various aspects. One mystery is the formation of the million-degree corona and the solar wind, which creates a bubble called heliosphere in ...The sun, the host star of the Earth and human beings, is still mysterious in various aspects. One mystery is the formation of the million-degree corona and the solar wind, which creates a bubble called heliosphere in the galactic interstellar medium. As a typical G-type star on the main sequence, the sun is the only star in the universe that mankind can have an opportunity to stare in detail and touch through in-situ measurements.展开更多
Solar ultraviolet(UV) bursts are small-scale compact brightenings in transition region images. The spectral profiles of transition region lines in these bursts are significantly enhanced and broadened, often with chro...Solar ultraviolet(UV) bursts are small-scale compact brightenings in transition region images. The spectral profiles of transition region lines in these bursts are significantly enhanced and broadened, often with chromospheric absorption lines such as Ni ii 1335.203 and 1393.330 A superimposed. We investigate the properties of several UV bursts using a coordinated observation of the Interface Region Imaging Spectrograph(IRIS), Solar Dynamics Observatory(SDO), and Hinode on February 7, 2015. We have identified 12 UV bursts, and 11 of them reveal small blueshifts of the Ni ii absorption lines. However, the Ni ii lines in one UV burst exhibit obvious redshifts of ~20 km s^-1, which appear to be related to the cold plasma downflows observed in the IRIS slit-jaw images. We also examine the three-dimensional magnetic field topology using a magnetohydrostatic model, and find that some UV bursts are associated with magnetic null points or bald patches. In addition, we find that these UV bursts reveal no obvious coronal signatures from the observations of the Atmospheric Imaging Assembly(AIA) on board SDO and the EUV Imaging Spectrometer(EIS) on board Hinode.展开更多
文摘Solar transients and their related interplanetary counterparts have severe effects on the space environments of the Earth. Therefore, the research of solar corona and interplanetary physics has become the focus of study for both solar and space scientists. Considerable progress has been achieved in these aspects by the solar and space physics community of China during 2012–2014, which will be given in this report. The brief report summarizes the research advances of solar corona and interplanetary physics into the following parts: solar wind origin and turbulence, coronal waves and seismology, solar eruptions, solar energetic particle and galactic cosmic ray, magnetic reconnection,Magnetohydrodynamic(MHD) models and their applications, waves and structures in solar wind,propagation of ICMEs/shocks and their arrival time predictions. These research achievements have been achieved by Chinese solar and space scientists independently or via international collaborations.
文摘During the past two years(2016–2018), great achievements have been made in the Chinese research of interplanetary physics, with nearly 100 papers published in the academic journals. The achievements are including but not limited to the following topics: solar corona; solar wind and turbulence; filament/prominence and jets; solar flare; radio bursts; particle acceleration at coronal shocks; magnetic flux ropes; instability;instrument; Coronal Mass Ejections(CMEs) and their interplanetary counterparts; Magnetohydrodynamic(MHD) numerical modeling; solar energetic particles and cosmic rays. The progress further improves our understanding of the eruptions of solar activities, their evolutions and propagations in the heliosphere, and final geoeffects on our Earth. These results were achieved by the Chinese solar and space scientists independently or via international collaborations. This paper will give a brief review of these achievements.
文摘Great progress has been made in the research of solar corona and interplanetary physics by the Chinese scientists during the past two years(2014—2016).Nearly 100 papers were published in this area.In this report,we will give a brief review to these progresses.The investigations include:solar corona,solar wind and turbulence,superhalo electron and energetic particle in the inner heliosphere,solar flares and radio bursts,Coronal Mass Ejections(CMEs) and their interplanetary counterparts,Magnetohydrodynamic(MHD) numerical modeling,CME/shock arrival time prediction,magnetic reconnection,solar variability and its impact on climate.These achievements help us to better understand the evolution of solar activities,solar eruptions,their propagations in the heliosphere,and potential geoeffectiveness.They were achieved by the Chinese solar and space scientists independently or via international collaborations.
基金Supported by the B-type Strategic Priority Research Program of Chinese Academy of Sciences(XDB41000000)the National Natural Science Foundation of China(41531073,41731067,41861164026,41874202,41474153)+1 种基金the Youth Innovation Promotion Association of Chinese Academy of Sciences(2016133)Chinese Academy of Sciences Research Fund for Key Development Directions。
文摘Significant progress has been made by Chinese scientists in research of interplanetary physics during the recent two years(2018–2020).These achievements are reflected at least in the following aspects:Activities in solar corona and lower solar atmosphere;solar wind and turbulence;filament/prominence,jets,flares,and radio bursts;active regions and solar eruptions;coronal mass ejections and their interplanetary counterparts;other interplanetary structures;space weather prediction methods;magnetic reconnection;Magnetohydrodynamic(MHD)numerical modeling;solar energetic particles,cosmic rays,and Forbush decreases;machine learning methods in space weather and other aspects.More than one hundred and forty papers in the academic journals have been published in these research directions.These fruitful achievements are obtained by Chinese scholars in solar physics and space physics either independently or through international collaborations.They greatly improve people’s understanding of solar activities,solar eruptions,the corresponding space weather effects,and the Sun-Earth relations.Here we will give a very brief review on the research progress.However,it must be pointed out that this paper may not completely cover all achievements in this field due to our limited knowledge.
基金Supported by the Strategic Priority Research Program of Chinese Academy of Sciences(XDB 41000000)National Natural Science Foundation of China(41531073,41731067,41861164026,41874202,41474153,42074183 and U1738128)+2 种基金the Youth Innovation Promotion Association of Chinese Academy of Sciences(2016133)Pandeng Program of National Space Science CenterChinese Academy of Sciences。
文摘Through independent research by the Chinese scientists or their international collaborations,great achievements have been made in interplanetary physics research in China' Mainland during the past two years(2020-2022).More than 150 papers have been published in academic journals in this field during this period.These achievements can be grouped into the following areas,at least:(i)solar corona;(ii)solar and interplanetary transient phenomena;(iii)radio bursts;(iv)Magnetohydrodynamic(MHD)numerical modeling;(v)solar energetic particles and cosmic rays.These advances have greatly enriched our understanding of interplanetary physics,i.e.our knowledge of solar activities and solar eruptions,their propagation in the interplanetary space,and the corresponding geoeffects on the Earth.In the sense of application,they have also improved the forecasting of space weather.In this paper we will give a very short review about these advances.
基金supported by the National Natural Science Foundation of China(Grant Nos.41421003,41474148,41774183&41374167)Major Project of Chinese National Programs for Fundamental Research and Development(Grant No.2012CB825603)
文摘We identified 28 discrete electron events(DEEs) with enhanced fluxes at ~50-200 keV in the high-altitude cusp/polar cap/lobe,using the electron measurements by the BeiDa Image Electron Spectrometer(BD-IES) instrument onboard an inclined(55°)geosynchronous orbit(IGSO) satellite from October 2015 to January 2016. We find that among the 28 DEEs, 22 occur in the nightside and mostly in the northern cusp/polar cap/lobe, while 6 occur in the dayside and all in the southern cusp; 24 events correspond to an average interplanetary magnetic field(IMF) component B_z>0, 3 correspond to an average IMF B_z<0, and 1 has no OMNI IMF data. In these DEEs, the observed average omnidirectional electron differential flux generally fits well to a power-law spectrum, J^E^(-γ), with the spectral index y ranging from 2.6 to 4.6, while the average electron flux varies over three orders of magnitude from event to event. The spectral index of these cusp DEEs are(strongly) larger than the spectral index of solar wind superhalo electrons(radiation belt electrons) observed by the WIND 3 D Plasma & Energetic Particle instrument(the BD-IES). At^110 keV,the electron flux of DEEs in the cusp/polar cap/lobe shows a weak positive correlation with the solar wind superhalo electron flux but no obvious correlation with the radiation belt electron flux. These results suggest that these DEEs probably originate from transient processes acting on the solar wind superhalo electrons, e.g., the mid/high-latitude reconnection.
文摘The sun, the host star of the Earth and human beings, is still mysterious in various aspects. One mystery is the formation of the million-degree corona and the solar wind, which creates a bubble called heliosphere in the galactic interstellar medium. As a typical G-type star on the main sequence, the sun is the only star in the universe that mankind can have an opportunity to stare in detail and touch through in-situ measurements.
基金supported by the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDA17040507)the National Natural Science Foundation of China(Grant Nos.11825301,11790304(11790300),41774183&41861134033)the Strategic Pioneer Program on Space Science of Chinese Academy of Sciences(Grant Nos.XDA15011000&XDA15010900)
文摘Solar ultraviolet(UV) bursts are small-scale compact brightenings in transition region images. The spectral profiles of transition region lines in these bursts are significantly enhanced and broadened, often with chromospheric absorption lines such as Ni ii 1335.203 and 1393.330 A superimposed. We investigate the properties of several UV bursts using a coordinated observation of the Interface Region Imaging Spectrograph(IRIS), Solar Dynamics Observatory(SDO), and Hinode on February 7, 2015. We have identified 12 UV bursts, and 11 of them reveal small blueshifts of the Ni ii absorption lines. However, the Ni ii lines in one UV burst exhibit obvious redshifts of ~20 km s^-1, which appear to be related to the cold plasma downflows observed in the IRIS slit-jaw images. We also examine the three-dimensional magnetic field topology using a magnetohydrostatic model, and find that some UV bursts are associated with magnetic null points or bald patches. In addition, we find that these UV bursts reveal no obvious coronal signatures from the observations of the Atmospheric Imaging Assembly(AIA) on board SDO and the EUV Imaging Spectrometer(EIS) on board Hinode.
