A5068597692- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Geomagnetism and Paleomagnetism Studies
- Earthquake Detection and Analysis
- Astro and Planetary Science
- Atmospheric Ozone and Climate
- GNSS positioning and interference
- Geophysics and Gravity Measurements
- Lightning and Electromagnetic Phenomena
- Fractional Differential Equations Solutions
- Nanofluid Flow and Heat Transfer
- Hydrocarbon exploration and reservoir analysis
- Magnetic confinement fusion research
- Model Reduction and Neural Networks
- Atomic and Subatomic Physics Research
- Seismic Imaging and Inversion Techniques
- Meteorological Phenomena and Simulations
- Hydraulic Fracturing and Reservoir Analysis
- Methane Hydrates and Related Phenomena
- Oceanographic and Atmospheric Processes
- Seismic Waves and Analysis
- Fluid Dynamics Simulations and Interactions
- Atmospheric and Environmental Gas Dynamics
- Nonlinear Dynamics and Pattern Formation
- Geophysical and Geoelectrical Methods
Boston University
1999-2024
Shandong University
2012-2024
University of Alaska Fairbanks
2015-2024
XinHua Hospital
2024
Shanghai Jiao Tong University
2024
National Center for Nanoscience and Technology
2015-2024
National Institute of Metrology
2023
Hong Kong Polytechnic University
2023
Tsinghua University
2023
National Institute for Radiological Protection
2021
A new method is described to analyze the dimensional character of observed structures using multipoint magnetic field measurements four or more spacecraft. The technique can provide three directions along which has minimum, intermediate, and maximum derivatives if gradient tensor G = ∇ at every moment been estimated by measurements. It follows that structure's dimensionality variation direction be directly determined. Both Cluster observations simulations have shown it feasible obtain...
The interaction between interplanetary shocks and the Earth's magnetosphere manifests in many important space physics phenomena including particle acceleration. We investigated response of inner magnetospheric hydrogen oxygen ions to a strong shock impinging on magnetosphere. Both are found be heated/accelerated significantly with their temperature enhanced by factor two three immediately after ∼1 min ∼12 arrival respectively. Multiple energy dispersion signatures were parallel anti‐parallel...
We present Time History of Events and Macroscale Interactions during Substorms (THEMIS) observations a “Spontaneous Hot Flow Anomaly” (SHFA) upstream from the prenoon bow shock at 0431 UT on 12 August 2007. Although SHFA exhibited greatly heated deflected solar wind plasmas used to identify hot flow anomalies (HFAs), it did not result standard mechanism invoked for formation HFAs, namely interaction an interplanetary magnetic field (IMF) discontinuity with shock. employ THEMIS A, B, C, D...
The energetic electrons and ions embedded in Earthward‐moving plasmoid structures have been observed. These plasmoids are associated with a rotational local B z component (bi‐polar) signature. Energetic found to be confined smaller spatial region than inside the plasmoid. seem good indicator for structure boundary. fleet of Cluster spacecraft cross “first entry, last out” order (Note: when planar discontinuity, e.g. magnetopause, they will first order). This documents fact that has...
When a solar wind dynamic pressure impulse impinges on the magnetophere, ultra‐low‐frequency (ULF) waves can be excited in magnetosphere and energy transported from interplanetary space into inner magnetosphere. In this paper, we have systematically studied ULF at geosynchronous orbit by both positive negative pulses. We identified 270 events pulses 254 1 January 2001 to 31 March 2009. found that poloidal toroidal oscillate similar manner of phase near 06:00 local time (LT) 18:00 LT, but...
An understanding of the transport solar wind plasma into and throughout terrestrial magnetosphere is crucial to space science weather. For non-active periods, there little agreement on where how entry might occur. Moreover, behaviour in high-latitude region behind magnetospheric cusps, for example, lobes, poorly understood, partly because lack coverage by previous missions. Here, using Cluster multi-spacecraft data, we report an unexpected discovery regions Earth's tailward cusps. From...
Abstract Motivated by recent THEMIS observations, this paper uses 2.5‐D electromagnetic hybrid simulations to investigate the formation of Spontaneous Hot Flow Anomalies (SHFAs) upstream quasi‐parallel bow shocks during steady solar wind conditions and in absence discontinuities. The results show a large number structures along shock. Their outer edges exhibit density magnetic field enhancements, while their cores drops density, field, velocity, enhancements ion temperature. Using virtual...
A series of seven hot flow anomaly (HFA) events has been observed by the Time History Events and Macroscale Interactions during Substorms (THEMIS) C spacecraft just upstream from subsolar bow shock 0100 to 1300 UT on 19 August 2008. Both young (no shocks at edges, two distinct ion populations) mature (strong a single population) HFAs have observed. Further upstream, THEMIS B four proto‐HFAs (density magnetic field strength depletions, plasma heating but no deflections) which later developed...
Magnetic holes (MHs), with a scale much greater than \r{ho}i (proton gyroradius), have been widely reported in various regions of space plasmas. On the other hand, kinetic-size magnetic (KSMHs), previously called small size (SSMHs), order magnitude or less only Earth's magnetospheric plasma sheet. In this study, we report such KSMHs magnetosheath whereby use measurements from Magnetospheric Multiscale (MMS) mission, which provides three-dimensional (3D) particle distribution resolution...
Abstract We present in situ observations of a shock‐induced substorm‐like event on 13 April 2013 observed by the newly launched Van Allen twin probes. Substorm‐like electron injections with energy 30–500 keV were region from L ∼5.2 to 5.5 immediately after shock arrival (followed energetic drift echoes). Meanwhile, flux was clearly and strongly varying ULF wave time scale. It is found that both toroidal poloidal mode waves period 150 s emerged following magnetotail magnetic field...
Abstract Kinetic‐scale magnetic dips (KSMDs), with a significant depression in field strength, and scale length close to less than one proton gyroradius, were reported the turbulent plasmas both recent observation numerical simulation studies. These KSMDs likely play important roles energy conversion dissipation. In this study, we present observations of that are labeled whistler mode waves, electrostatic solitary electron cyclotron waves magnetosheath. The suggest temperature anisotropy or...
Abstract Spacecraft observations and global hybrid (kinetic ions fluid electrons) simulations have demonstrated that ion dissipation processes at the quasi‐parallel bow shock are associated with formation of structures called spontaneous hot flow anomalies (SHFAs). Previous recent spacecraft also established SHFAs result in magnetosheath filamentary (MFS). In this paper we demonstrate addition to MFS, cavities decreases density, velocity, magnetic field enhancements temperature. We use...
Sudden impulses (SIs) are an important source of ultra low frequency (ULF) wave activity throughout the Earth's magnetosphere. Most SI‐induced ULF events have been reported in dayside magnetosphere; it is not clear when and how SIs drive nightside plasma sheet. We examined response sheet to using ensemble 13 SI observed by THEMIS (Timed History Events Macroscale Interactions during Substorms) satellites (probes). Only three these resulted activity. The periods waves found be 3.3, 6.0, 7.6...
Abstract The foreshock region involves localized and transient structures such as cavities hot flow anomalies due to solar wind‐bow shock interactions, transients have been shown lead magnetospheric ionospheric responses. In this paper, the interaction between a magnetosphere‐ionosphere system is investigated using dayside aurora imagers revealing propagation in greater detail than previously possible. A was detected by Time History of Events Macroscale Interactions during Substorms B C...
Abstract As one type of driver magnetospheric Alfvén waves, foreshock transients have received less attention than, for example, the Kelvin‐Helmholtz instability, discrete and broadband frequency solar wind dynamic pressure oscillations, interplanetary shocks. Previous works show that can induce both mode compressional Pc 3–5 ULF waves inside magnetosphere. However, to our knowledge, none these reported induced by transients, are proved be localized in In this paper, using situ ground‐based...
Abstract We present a statistical study of plasmaspheric plumes and ionospheric outflows observed by the Cluster spacecraft near dayside magnetopause. Plasmaspheric are identified when low‐energy ions (<1 keV) with ∼90° pitch angle distributions Ion Spectrometer/Hot Analyzer instrument. The characterized unidirectional or bidirectional field‐aligned in magnetosphere. Forty‐three (10%) plume events 32 (7%) outflow were detected out 442 times that C3 crossed magnetopause between 2007 2009....
Abstract Mirror‐mode structures are widely observed in space plasma environments. Although features within the have been extensively investigated theoretical models and numerical simulations, relatively few observational studies made, due to a lack of high‐cadence measurements particle distributions previous missions. In this work, electron dynamics associated with mirror‐mode studied based on Magnetospheric Multiscale observations pitch angle distributions. We define peaks/troughs as region...
Abstract Magnetic cavities (sometimes referred to as magnetic holes) at electron kinetic scale are thought be one of the extremely small intermittent structures formed in magnetized turbulent plasmas, where turbulence energy cascaded down may finally dissipated and consequently energize electrons. However, geometry formation these remain not definitively resolved. Here we discuss an cavity embedded a proton observed by MMS spacecraft magnetosheath. By applying innovative particle sounding...
Abstract Pc5 (2–7 mHz) ultralow frequency (ULF) waves play a significant role in resonating with particles and transferring energy the coupled magnetospheric ionospheric system. Recent studies found that ULF can be triggered by foreshock transients which perturb magnetopause through dynamic pressure variation. However, whether transient‐driven are geoeffective propagate globally is still poorly understood. In this study, we take advantage of conjunction between situ (by THEMIS probes,...
Disease emergence is the consequence of host-pathogen-environment interactions. Ammonia a key stress factor in aquatic environments that usually increases risk pathogenic diseases animals. However, molecular regulatory mechanisms underlying enhancement viral infection following ammonia remain largely unknown. Here, we found enhances white spot syndrome virus kuruma shrimp (Marsupenaeus japonicus) by targeting antiviral interferon-like system through heat shock 1 (Hsf1). Hsf1 an...