Yaqi Jin
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View article: Eastward transients in the dayside ionosphere. II. A parallel-plate capacitorlike effect
Eastward transients in the dayside ionosphere. II. A parallel-plate capacitorlike effect Open
During the 23 April 2023 geospace storm, we observed chorus-wave-driven, energetic particle precipitation on closed magnetic field lines in the dayside magnetosphere. Simultaneously and in the ionosphere's bottom side, we observed signatur…
View article: Comparison of F‐Region Ion Velocities Measured by Swarm Satellites and EISCAT Radars
Comparison of F‐Region Ion Velocities Measured by Swarm Satellites and EISCAT Radars Open
Ionospheric ion flow velocities measured by the Swarm satellites are compared with the ion velocities estimated from the European Incoherent Scatter (EISCAT) radar measurements in Tromsø and on Svalbard. A comparison is carried out between…
View article: Eastward transients in the dayside ionosphere. I. Electrodynamics on closed field lines
Eastward transients in the dayside ionosphere. I. Electrodynamics on closed field lines Open
At night in Earth's polar regions, energetic aurorae frequently penetrate into the atmosphere, with the peculiar effect of driving turbulent electrojet currents in the bottomside ionosphere. During the day, however, Earth's plasma environm…
View article: Meter-scale Observations of Equatorial Plasma Turbulence
Meter-scale Observations of Equatorial Plasma Turbulence Open
The multi-Needle Langmuir Probe collects an electron current through four fixed-bias cylindrical copper needles. This allows for an extremely high sampling frequency, with plasma properties being inferred through polynomial fitting in the …
View article: A critical role for IL-21/IL-21 receptor signaling in isoproterenol-induced cardiac remodeling
A critical role for IL-21/IL-21 receptor signaling in isoproterenol-induced cardiac remodeling Open
Increased cytokine secretion from immune cells is often associated with cardiac remodeling and heart failure due to pressure overload. Several reports suggest that the IL-21/IL-21 receptor (IL-21R) signaling pathway may play a critical rol…
View article: The Propagation and Evolution of Polar Cap Patches During Auroral Substorm Activity
The Propagation and Evolution of Polar Cap Patches During Auroral Substorm Activity Open
Polar cap patches are islands of enhanced plasma density formed during intervals of southward interplanetary magnetic field (IMF). The present study examines the observations of polar cap patches during sequential auroral substorms that oc…
View article: Plasma structuring within an expanded polar cap and cusp studied with the SS-520-3 sounding rocket
Plasma structuring within an expanded polar cap and cusp studied with the SS-520-3 sounding rocket Open
The SS-520-3 sounding rocket was launched on November 4th, 2021 as part of the Grand Challenge Initiative - Cusp from Ny-Ålesund, Svalbard. The rocket was launched into the cusp ionosphere during the main phase of a geomagnetic storm. In t…
View article: Significant Plasma Density Depletion From High‐ to Mid‐Latitude Ionosphere During the Super Storm in May 2024
Significant Plasma Density Depletion From High‐ to Mid‐Latitude Ionosphere During the Super Storm in May 2024 Open
We demonstrate the global response of the ionosphere to the geomagnetic super storm on 10–11 May 2024. The in situ observations from the Swarm spacecraft show a rapid depletion of plasma density in the dawn and dusk sectors following the s…
View article: Semaphorin 3s signaling in the central nervous system: Mechanisms and therapeutic implication for brain diseases
Semaphorin 3s signaling in the central nervous system: Mechanisms and therapeutic implication for brain diseases Open
Class 3 semaphorins (Sema3s), identified as secreted soluble proteins, present many therapeutic potentials. Recent evidence has suggested that Sema3s as molecular cue participate in neuroregulation, angiogenesis, and microenvironment homeo…
View article: Transient, Turbulent Hall Currents in the Sunlit Terrestrial Ionosphere
Transient, Turbulent Hall Currents in the Sunlit Terrestrial Ionosphere Open
At night in Earth's polar regions, energetic aurorae frequently penetrate into the atmosphere, driving turbulent electrojet currents in the bottomside ionosphere. During the day, however, Earth's plasma environment become highly conductive…
View article: Eastward Transients in the Dayside Ionosphere II: A Parallel-plate Capacitor-Like Effect
Eastward Transients in the Dayside Ionosphere II: A Parallel-plate Capacitor-Like Effect Open
During the 23 April 2023 geospace storm, we observed chorus wave-driven, energetic particle precipitation on closed magnetic field lines in the dayside magnetosphere. Simultaneously and in the ionosphere's bottom-side, we observed signatur…
View article: Transient, Turbulent Hall Currents in the Sunlit Terrestrial Ionosphere
Transient, Turbulent Hall Currents in the Sunlit Terrestrial Ionosphere Open
The `cusp' emerges from a direct coupling between Earth's ionosphere and the solar wind, and the dynamic auroras found in the cusp-region have long been taken to reflect the time-history of pulsed magnetic reconnection between Earth's magn…
View article: Strong turbulent flow in the sub-auroral region in the Antarctic can deteriorate satellite-based navigation signals
Strong turbulent flow in the sub-auroral region in the Antarctic can deteriorate satellite-based navigation signals Open
In the subauroral zone at the boundary of the auroral oval in the evening and night hours during geomagnetic disturbances, a narrow (about 1º-2º) and extended structure (several hours in longitude) is formed. It is known as a polarization …
View article: Plasma Structure Decay Rates in the Equatorial Ionosphere Are Strongly Coupled by Turbulence
Plasma Structure Decay Rates in the Equatorial Ionosphere Are Strongly Coupled by Turbulence Open
Equatorial plasma irregularities in the ionospheric F‐region proliferate after sunset, causing the most apparent radio scintillation “hot‐spot” in geospace. These irregularities are caused by plasma instabilities, and appear mostly in the …
View article: To what degree does a high-energy aurora destroy F-region irregularities?
To what degree does a high-energy aurora destroy F-region irregularities? Open
Using two separate databases of in situ ionospheric observations, we present case studies and perform a statistical investigation of the link between energetic precipitating particles during the polar night and high-latitude F-region steep…
View article: A model to estimate the L-band amplitude scintillation index from Swarm: the outer scale length assumption
A model to estimate the L-band amplitude scintillation index from Swarm: the outer scale length assumption Open
Irregularities in the plasma density in the ionosphere affect trans-ionospheric radio signals, resulting in fluctuations in the amplitude and phase of these signals, known as amplitude and phase scintillations. We recently developed a mode…
View article: The Turkey Earthquake Induced Equatorial Ionospheric Current Disturbances on 6 February 2023
The Turkey Earthquake Induced Equatorial Ionospheric Current Disturbances on 6 February 2023 Open
An earthquake is a seismic event resulting from a sudden release of energy in the lithosphere, which produces waves that can propagate through the atmosphere into the ionosphere, causing ionospheric disturbances, and excites an additional …
View article: Scintillation Index Analysis of ship-borne GNSS Data recorded during Cruises of Research Vessels in the Arctic
Scintillation Index Analysis of ship-borne GNSS Data recorded during Cruises of Research Vessels in the Arctic Open
We report in this paper on a study of scintillation index data acquired with Global Navigation Satellite System (GNSS) receivers. The GNSS receiver were installed on research vessels for cruises in the Arctic. The focus lies on a one-year …
View article: Statistical models of the variability of plasma in the topside ionosphere: 2. Performance assessment
Statistical models of the variability of plasma in the topside ionosphere: 2. Performance assessment Open
Statistical models of the variability of plasma in the topside ionosphere based on the Swarm data have been developed in the “Swarm Variability of Ionospheric Plasma” (Swarm-VIP) project within the European Space Agency’s Swarm+4D-Ionosphe…
View article: Statistical models of the variability of plasma in the topside ionosphere: 1. Development and optimisation
Statistical models of the variability of plasma in the topside ionosphere: 1. Development and optimisation Open
This work presents statistical models of the variability of plasma in the topside ionosphere based on observations made by the European Space Agency’s (ESA) Swarm satellites. The models were developed in the “Swarm Variability of Ionospher…