筛选条件 共查询到68条结果
排序方式
Modelling the residual mean meridional circulation at different stages of sudden stratospheric warming events

期刊: ANNALES GEOPHYSICAE, 2021; 39 (2)

Ensemble simulation of the atmospheric general circulation at altitudes up to the lower thermosphere is performed using the 3-D nonlinear mechanistic ......

Reflection of low-frequency fast magnetosonic waves at the local two-ion cutoff frequency: observation in the plasmasphere

期刊: ANNALES GEOPHYSICAE, 2021; 39 (4)

We investigate the reflection of low-harmonic fast magnetosonic (MS) waves at the local two-ion cutoff frequency (f(cutHe+)). By comparing the wave si......

Dynamic processes in the magnetic field and in the ionosphere during the 30 August-2 September 2019 geospace storm: influence on high frequency radio wave characteristics

期刊: ANNALES GEOPHYSICAE, 2021; 39 (4)

The concept that geospace storms are comprised of synergistically coupled magnetic storms, ionospheric storms, atmospheric storms, and storms in the e......

A new perspective and explanation for the formation of plasmaspheric shoulder structures

期刊: ANNALES GEOPHYSICAE, 2021; 39 (4)

Over the hours of 05:00-09:00 UT on 8 June 2001, the extreme ultraviolet (EUV) instrument on board the IMAGE satellite observed a shoulder-like format......

Attenuation of plasmaspheric hiss associated with the enhanced magnetospheric electric field

期刊: ANNALES GEOPHYSICAE, 2021; 39 (3)

We report an attenuation of hiss wave intensity in the duskside of the outer plasmasphere in response to enhanced convection and a substorm based on V......

Structural characterization of the equatorial F region plasma irregularities in the multifractal context

期刊: ANNALES GEOPHYSICAE, 2020; 38 (2)

In the emerging ionosphere-space-weather paradigm, investigating the dynamical properties of ionospheric plasma irregularities using advanced computat......

Performance of the IRI-2016 over Santa Maria, a Brazilian low-latitude station located in the central region of the South American Magnetic Anomaly (SAMA)

期刊: ANNALES GEOPHYSICAE, 2020; 38 (2)

In this work we analyze the ionograms obtained by the recent digisonde installed in Santa Maria (29.7 degrees S, 53.7 degrees W, dip angle = -37 degre......

Stratification observed by the in situ plasma density measurements from the Swarm satellites

期刊: ANNALES GEOPHYSICAE, 2020; 38 (2)

The stratification phenomenon is investigated using the simultaneous in situ plasma density measurements obtained by the Swarm satellites orbiting at ......

Ionospheric Pc1 waves during a storm recovery phase observed by the China Seismo-Electromagnetic Satellite

期刊: ANNALES GEOPHYSICAE, 2020; 38 (3)

During the storm recovery phase on 27 August 2018, the China Seismo-Electromagnetic Satellite (CSES) detected Pcl wave activities in both the Northern......

Relation between the asymmetric ring current effect and the anti-sunward auroral currents, as deduced from CHAMP observations

期刊: ANNALES GEOPHYSICAE, 2020; 38 (3)

During magnetically active periods the storm-time disturbance signal on the ground commonly develops an azimuthal asymmetry. Negative deflections of t......

BeiDa Imaging Electron Spectrometer observation of multi-period electron flux modulation caused by localized ultra-low-frequency waves

期刊: ANNALES GEOPHYSICAE, 2020; 38 (4)

We present multi-period modulation of energetic electron flux observed by the BeiDa Imaging Electron Spectrometer (BD-IES) on board a Chinese navigati......

The very low-frequency transmitter radio wave anomalies related to the 2010 Ms 7.1 Yushu earthquake observed by the DEMETER satellite and the possible mechanism

期刊: ANNALES GEOPHYSICAE, 2020; 38 (5)

Earthquakes may disturb the lower ionosphere through various coupling mechanisms during the seismogenic and coseismic periods. The VLF (very low-frequ......

Epoch-by-epoch estimation and analysis of BeiDou Navigation Satellite System (BDS) receiver differential code biases with the additional BDS-3 observations

期刊: ANNALES GEOPHYSICAE, 2020; 38 (5)

The differential code bias (DCB) of the Global Navigation Satellite System (GNSS) is an important error source in ionospheric modeling, which was gene......

Estimating the maximum of the smoothed highest 3-hourly aa index in 3 d by the preceding minimum for the solar cycle

期刊: ANNALES GEOPHYSICAE, 2020; 38 (6)

Predicting the maximum intensity of geomagnetic activity for an upcoming solar cycle is important in space weather service and for planning future spa......

Quasi-10 d wave modulation of an equatorial ionization anomaly during the Southern Hemisphere stratospheric warming of 2002

期刊: ANNALES GEOPHYSICAE, 2020; 38 (1)

The present paper studies the perturbations in an equatorial ionization anomaly (EIA) region during the Southern Hemisphere (SH) sudden stratospheric ......

共68条页码: 1/5页15条/页