A5021356325- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Astro and Planetary Science
- Geomagnetism and Paleomagnetism Studies
- Stellar, planetary, and galactic studies
- Spectroscopy and Chemometric Analyses
- Leaf Properties and Growth Measurement
- Economic Theory and Policy
- Solar Radiation and Photovoltaics
- Tropical and Extratropical Cyclones Research
- Plant Physiology and Cultivation Studies
- Oil, Gas, and Environmental Issues
- Remote Sensing in Agriculture
- Banana Cultivation and Research
- Spacecraft Dynamics and Control
- Greenhouse Technology and Climate Control
- Geophysics and Gravity Measurements
- Plant nutrient uptake and metabolism
- Berry genetics and cultivation research
- Rocket and propulsion systems research
- Atmospheric Ozone and Climate
- Horticultural and Viticultural Research
Center for Astrophysics Harvard & Smithsonian
2024
Ministry of Agriculture and Rural Affairs
2023-2024
Nanjing Agricultural University
2023-2024
University of Science and Technology of China
2014-2023
Center for Excellence in Molecular Cell Science
2019-2022
University of Graz
2017-2019
Sichuan Agricultural University
2018-2019
China Astronaut Research and Training Center
2016-2018
The Sun's atmosphere is frequently disrupted by coronal mass ejections (CMEs), coupled with flares and energetic particles. In the standard picture, coupling explained magnetic reconnection at a vertical current sheet connecting flare loops CME, latter embedding helical structure known as flux rope. As it jumps upward due to instabilities or loss of equilibrium, rope stretches overlying so that oppositely directed field brought together underneath, creating sheet. However, both origin ropes...
We report the observation of an X-class long-duration flare which is clearly confined. It appears as a compact-loop in traditional EUV passbands (171 and 195 Å), but sensitive to plasmas (94 131 it exhibits cusp-shaped structure above arcade loops like other events. Inspecting images running difference approach, we find that seemingly diffuse, quasi-static consists multiple nested repeatedly rise upward disappear approaching cusp edge. Over gradual phase, detect numerous episodes loop...
ABSTRACT In this paper, we present the detailed analysis of recurrent homologous jets originating from an emerging negative magnetic flux at edge active region. The observed show multithermal features. Their evolution shows high consistence with characteristic parameters flux, suggesting that more free energy, eruptions tend to be violent, frequent, and blowout-like. average temperature, electron number density, axial speed are found similar for different jets, indicating they should have...
Abstract We performed a differential emission measure (DEM) analysis of candle-flame-shaped flares observed with the Atmospheric Imaging Assembly onboard Solar Dynamic Observatory . The DEM profile flaring plasmas generally exhibits double peak distribution in temperature, cold component around $\log T\approx6.2$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mo>log</mml:mo> <mml:mi>T</mml:mi> <mml:mo>≈</mml:mo> <mml:mn>6.2</mml:mn> </mml:math> and hot T\approx7.0$...
Abstract Deflection of coronal mass ejections (CMEs) in the interplanetary space, especially ecliptic plane, serves as an important factor deciding whether CMEs arrive at Earth. Observational studies have shown evidence for deflection, whose detailed dynamic processes, however, remain obscure. Here we developed a 2.5D ideal magnetohydrodynamic simulation to study propagation traveling with different speeds heliospheric equatorial plane. The confirms existence CME deflection which is related...
Abstract The main driver of the acceleration solar energetic particles (SEPs) is believed to be shocks driven by coronal mass ejections. Extreme-ultraviolet (EUV) waves are thought propagating footprint shock on surface. One key questions in SEP research timing release with respect time when EUV wave magnetically connects an observer. Taking advantage close-to-the-Sun measurements Parker Solar Probe (PSP) and Orbiter (SolO), we investigate event that occurred 2021 September 28 was observed...
Precise nitrogen supply is crucial for ensuring the quality of cut chrysanthemums (Chrysanthemum morifolium Ramat.). The nutrition index (NNI) serves as an important indicator diagnosing crop (N) nutrition. Hyperspectral remote sensing (HRS) technology has been widely used in monitoring N status due to its rapid, accurate, and non-destructive capabilities. However, application estimating NNI received limited attention. Therefore, this study aimed use HRS accurately determine chrysanthemum...
The 2011 January 28 M1.4 flare exhibits two side-by-side candle-flame-shaped loop systems underneath a larger cusp-shaped structure during the decay phase, as observed at northwestern solar limb by Solar Dynamics Observatory (SDO). northern system brightens following initiation of within southern system, but all three structures are characterized ~ 10 MK temperatures, hotter than arch-shaped loops underneath. "Ahead" satellite Terrestrial Relations (STEREO) provides top view, in which...
Abstract We report observations of an eruptive X2.8 flare on 2013 May 13, which shows two distinct episodes energy release in the impulsive phase. The first episode is characterized by eruption a magnetic flux rope, similar to energy-release process most standard flares. second episode, stronger than normal one and enhanced high-energy X-ray even γ -ray emissions, closely associated with reconnection large-scale loop aftermath eruption. inflow leg observed Solar Dynamics Observatory ( SDO...
Abstract Solar filaments often erupt partially. Although how they split remains elusive, the splitting process has potential of revealing filament structure and eruption mechanism. Here we investigate pre-eruption an apparently single its subsequent partial on 2012 September 27. The evolution is characterized by three stages with distinct dynamics. During quasi-static stage, proceeds gradually for about 1.5 hr, upper branch rising at a few kilometers per second displaying swirling motions...
The important role played by magnetic reconnection in the early acceleration of coronal mass ejections (CMEs) has been widely discussed. However, as CMEs may have expansion speeds comparable to their propagation corona, it is not clear whether and how contributes true separately. To address this question, we analyze dynamics a moderately fast CME on 2013 February 27, associated with continuous its front into high even though speed had reached $\sim$700~km~s$^{-1}$ larger than solar wind...
Solar eruptions occurring at different places within a relatively short time interval are considered to be sympathetic. However, it is difficult determine whether there exists cause and effect between them. Here we study failed successful filament eruption following an X1.8-class flare on 2014 December 20, in which slipping-like magnetic reconnections serve as key causal link among the eruptions. Reconnection signatures effects are: both sides of experiencing eruption, serpentine ribbons...
Multiple pieces of evidence have revealed the important role turbulence in physical processes solar eruptions, from particle acceleration to suppression conductive cooling. Radio observations density variation established a Kolmogorov-like spectrum for wind disturbance. Close Sun, measurements extreme ultraviolet (EUV) bands been used examine atmosphere. The Atmospheric Imaging Assembly onboard Solar Dynamics Observatory (SDO/AIA) has frequently diagnosing plasma properties due its complex...
Abstract Gradual and large solar energetic particle (SEP) events (flux of ions with energy >10 MeV above 10 pfu) are primarily produced in shocks driven by fast wide coronal mass ejections (CMEs). Past research, both theory statistics, has found that the situation where a primary CME (priCME) is preceded previous CMEs (preCMEs) favorable to more efficient acceleration. However, physical causes this association still matter debate, including acceleration release SEPs interaction successive...
A well-known precursor of an imminent solar eruption is the appearance a hot S-shaped loop, also known as sigmoid, in active region (AR). Classically, formation such loop envisaged to be implemented by magnetic reconnection two oppositely oriented J-shaped loops. However, details are elusive due weak emission and subtle evolution during pre-eruptive phase. In this paper, we investigate how single transforms into one through slippage its footpoints NOAA AR 11719 on 2013 April 11. During...
The scenario of twin coronal mass ejections (CMEs), i.e., a fast and wide primary CME (priCME) preceded by previous CMEs (preCMEs), has been found to be favorable more efficient particle acceleration in large solar energetic (SEP) events. Here, we study 19 events during 2007--2014 associated with twin-CME eruptions but without SEP observations at L1 point. We combine remote-sensing situ from multiple spacecraft investigate the role magnetic connectivity detection information 3-dimensional...
Solar flares and coronal mass ejections (CMEs) are closely coupled through magnetic reconnection. CMEs usually accelerated impulsively within the low solar corona, synchronized with impulsive flare energy release. We investigate dynamic evolution of a fast CME its associated X2.8 occurring on 2013 May 13. The experiences two distinct phases enhanced acceleration, an one peak value ~5 km s$^{-2}$ followed by extended phase accelerations up to 0.7 s$^{-2}$. two-phase dynamics is two-episode...
Abstract Magnetic energy during the catastrophe was predominantly studied by previous works since it is believed to be main supplier for solar eruptions. However, contribution of other types energies cannot neglected. This paper studies coronal flux rope system in wind background, with emphasis on transformation different catastrophe. The characterized its axial and poloidal magnetic fluxes total mass. It shown that a can triggered not only an increase but also decrease flux. Moreover,...
We investigate the evolutions of two prominences (P1, P2) and bundles coronal loops (L1, L2), observed with SDO/AIA near east solar limb on 2012 September 22. It is found that there were large-amplitude oscillations in P1 L1 but no detectable motions P2 L2. These transverse triggered by a large-scale wave, originating from large flare remote active region behind limb. By carefully comparing locations heights these oscillating non-oscillating structures, we conclude propagating height wave...
Extreme ultraviolet (EUV) waves are thought to be the propagating footprint of shock on solar surface. One key questions in SEP research is timing release with respect time when EUV wave magnetically connects an observer. Taking advantage close-to-the-Sun measurements by Parker Solar Probe (PSP) and Orbiter (SolO), we investigate event that occurred 2021 September 28 was observed at different locations SolO, PSP, STEREO-A, near-Earth spacecraft. During this time, PSP STEREO-A shared similar...