A5082030846- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Geomagnetism and Paleomagnetism Studies
- Solar Radiation and Photovoltaics
- Geophysics and Gravity Measurements
- Earthquake Detection and Analysis
- Advanced Fiber Laser Technologies
- Optical Polarization and Ellipsometry
- Astrophysics and Cosmic Phenomena
- Photonic Crystal and Fiber Optics
- Magnetic confinement fusion research
- Bayesian Modeling and Causal Inference
- Advanced Fiber Optic Sensors
- Laser-Matter Interactions and Applications
- Geological and Geochemical Analysis
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Semiconductor Lasers and Optical Devices
- Tropical and Extratropical Cyclones Research
- Photonic and Optical Devices
- Meteorological Phenomena and Simulations
- Gamma-ray bursts and supernovae
- Particle accelerators and beam dynamics
Hunan University
2025
Tianjin University
2003-2025
Yanshan University
2017-2025
State Key Laboratory of Metastable Materials Science and Technology
2025
University of Chinese Academy of Sciences
2016-2024
National Space Science Center
2015-2024
Chinese Academy of Sciences
2015-2024
Massachusetts Institute of Technology
2004-2023
Parsons (United States)
2020-2023
Chinese Academy of Meteorological Sciences
2007-2022
Basaltic lavas from Hainan Island near the northern edge of South China Sea have an age range between late Miocene (about 13 Ma) and Holocene, with a peak Pliocene to middle Pleistocene. The basaltic province is dominated by tholeiites subordinate alkali basalts. Most analysed samples display light rare earth element (LREE) enriched REE patterns ocean island basalt (OIB)-like incompatible distributions. basalts contain abundant undeformed high-Mg olivine phenocrysts (up Fo90·7) that are high...
As observed in Thomson-scattered white light, coronal mass ejections (CMEs) are manifest as large-scale expulsions of plasma magnetically driven from the corona most energetic eruptions Sun. It remains a tantalizing mystery to how these erupting magnetic fields evolve form complex structures we observe solar wind at Earth. Here, strive provide fresh perspective on post-eruption and interplanetary evolution CMEs, focusing physical processes that define many interactions ejected with its...
Abstract The severe geomagnetic effects of solar storms or coronal mass ejections (CMEs) are to a large degree determined by their propagation direction with respect Earth. There is lack understanding the processes that determine non-radial propagation. Here we present synthesis data from seven different space missions fast CME, which originated in an active region near disk centre and, hence, significant impact was forecasted. However, CME demonstrated be channelled during eruption into...
We describe a geometric triangulation technique, based on time–elongation maps constructed from imaging observations, to track coronal mass ejections (CMEs) continuously in the heliosphere and predict their impact Earth. Taking advantage of stereoscopic observations Solar Terrestrial Relations Observatory, this technique can determine propagation direction radial distance CMEs birth corona all way 1 AU. The efficacy method is demonstrated by its application 2008 December 12 CME, which...
We reconstruct the global structure and kinematics of coronal mass ejections (CMEs) using coordinated imaging in situ observations from multiple vantage points. A forward modeling technique, which assumes a rope-like morphology for CMEs, is used to determine (including orientation propagation direction) coronagraph observations. corresponding measurements at 1 AU with Grad–Shafranov method, gives flux-rope orientation, cross section, rough knowledge direction. CME (propagation direction...
We study the interaction of two successive coronal mass ejections (CMEs) during 2010 August 1 events using STEREO/SECCHI COR and HI data. obtain direction motion for both CMEs by applying several independent reconstruction methods find that head in similar directions. This provides evidence a full takes place between can be observed HI1 field-of-view. The de-projected kinematics faster CME from Sun to Earth is derived combining remote observations with situ measurements at AU. speed profile...
Forecasting the in situ properties of coronal mass ejections (CMEs) from remote images is expected to strongly enhance predictions space weather, and general interest for studying interaction CMEs with planetary environments. We study feasibility using a single heliospheric imager (HI) instrument, imaging solar wind density Sun 1 AU, connecting observations CMEs. compare speed arrival time 22 (in 2008-2012) corresponding interplanetary ejection (ICME) parameters at observatories (STEREO...
Recent Solar Dynamic Observatory observations reveal that coronal mass ejections (CMEs) consist of a multi-temperature structure: hot flux rope and cool leading front (LF). The first appears as twisted channel in the Atmospheric Imaging Assembly (AIA) 94 Å 131 passbands. initially lies along polarity inversion line then rises develops into semi-circular flux-rope-like structure during impulsive acceleration phase CMEs. In meantime, rising compresses surrounding magnetic field plasma, which...
The successive coronal mass ejections (CMEs) from 2010 July 30 - August 1 present us the first opportunity to study CME-CME interactions with unprecedented heliospheric imaging and in situ observations multiple vantage points. We describe two cases of CME interactions: merging CMEs launched close time overtaking a preceding by shock wave. on interact Sun form merged front, which then overtakes near AU, as revealed wide-angle observations. Connections between signatures at AU suggest that...
We investigate how coronal mass ejections (CMEs) propagate through, and interact with, the inner heliosphere between Sun Earth, a key question in CME research space weather forecasting. Sun-to-Earth kinematics are constrained by combining wide-angle heliospheric imaging observations, interplanetary radio type II bursts situ measurements from multiple vantage points. select three events for this study, 2012 January 19, 23, March 7 CMEs. Different previous event studies, work attempts to...
The largest geomagnetic storms of solar cycle 24 so far occurred on 2015 March 17 and June 22 with $D_{\rm st}$ minima $-223$ $-195$ nT, respectively. Both the show a multi-step development. We examine plasma magnetic field characteristics driving coronal mass ejections (CMEs) in connection development storms. A particular effort is to reconstruct situ structure using Grad-Shafranov technique compare reconstruction results observations, which gives larger spatial perspective source...
Abstract The largest geomagnetic storm in two decades occurred 2024 May with a minimum D st of −412 nT. We examine its solar and interplanetary origins by combining multipoint imaging situ observations. source active region, NOAA AR 13664, exhibited extraordinary activity produced successive halo eruptions, which were responsible for complex ejecta observed at the Earth. In measurements from STEREO A, was 12.°6 apart, allow us to compare “geo-effectiveness” Earth A. obtain key findings...
We present direct evidence that magnetic clouds (MCs) have highly flattened and curved cross section resulting from their interaction with the ambient solar wind. Lower limits on transverse size are obtained for three MCs observed by ACE Ulysses latitudinal separation between two spacecraft, ranging 40° to 70°. The cross‐section aspect ratio of is estimated be no smaller than 6:1. offer a simple model extract radius curvature section, based elevation angle MC normal distributed over...
We address the nature of EUV waves through direct observations formation a diffuse wave driven by expansion coronal mass ejection (CME) and its subsequent separation from CME front. The on 2011 June 7 were well observed Atmospheric Imaging Assembly board Solar Dynamics Observatory. Following solar eruption onset, marked beginning rapid increasing velocity X-ray flux accompanying flare, exhibits strong lateral expansion. During this impulsive phase, speed bubble increases 100 km s−1 to 450 in...
The twin-spacecraft STEREO mission has enabled simultaneous white-light imaging of the solar corona and inner heliosphere from multiple vantage points. This led to development numerous stereoscopic techniques investigate three-dimensional structure kinematics wind transients such as coronal mass ejections (CMEs). Two methods—triangulation tangent a sphere—can be used determine time profiles propagation direction radial distance (and thereby speed) transient it travels through heliosphere,...
We present multi-point in situ observations of a complex sequence coronal mass ejections (CMEs) which may serve as benchmark event for numerical and empirical space weather prediction models. On 2010 August 1, instruments on various missions, Solar Dynamics Observatory/Solar Heliospheric Observatory/Solar-TErrestrial-RElations-Observatory (SDO/SOHO/STEREO), monitored several CMEs originating within tens degrees from the solar disk center. compare their imprints four widely separated...