Article
Astronomy & Astrophysics
D-C Talpeanu, S. Poedts, E. D'Huys, M. Mierla
Summary: We conducted numerical simulations to study the dynamics and structure of consecutive eruptions on Earth, and their effects on different background solar winds. Our findings highlight the significance of the initial magnetic configuration and subsequent eruptions in determining the geoeffectiveness of coronal mass ejections.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
X. J. Zhang, L. H. Deng, Z. P. Qiang, Y. Fei, X. A. Tian, C. Li
Summary: This research investigates the hemispheric asymmetry of coronal mass ejections (CMEs) between 1996 and 2020, and finds that the hemispheric asymmetry of CMEs is mainly caused by specific CMEs rather than regular CMEs. The hemispheric asymmetry of high-latitude CMEs appears to have little connection to that of low-latitude CMEs. The dominant hemisphere, cumulative trend, and amplitude of CMEs vary between different solar cycles.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Meteorology & Atmospheric Sciences
Gorm G. Jensen, Romain Fievet, Jan O. Haerter
Summary: Research shows that simulating the diurnal cycle can enable convective self-aggregation (CSA) at fine resolutions, and that this process can be accelerated by even finer resolutions. The emergence of vigorous combined cold pools with mesoscale convective systems is believed to be one of the reasons for these findings.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Astronomy & Astrophysics
Brian E. Wood, Carlos R. Braga, Angelos Vourlidas
Summary: This study presents the first analysis of the internal coronal mass ejection structure observed by the Wide-field Imager for Solar PRobe on board the Parker Solar Probe. Two linear features, one bright and one dark, were identified and interpreted as two independent flux rope structures within the overall CME outline.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Syed Ibrahim, Wahab Uddin, Bhuwan Joshi, Ramesh Chandra, Arun Kumar Awasthi
Summary: This study compared the properties of two coronal mass ejections (CMEs) and discussed their differences in near-Sun characteristics, interplanetary evolution, and geoeffectiveness. By analyzing the initiation and propagation parameters, the precise CME-ICME connection and their impact on Earth were established. The source region evolution of CMEs and their near-Sun propagation characteristics, such as CME-CME interactions, played important roles in determining their evolution in the interplanetary medium and subsequent geoeffectiveness.
RESEARCH IN ASTRONOMY AND ASTROPHYSICS
(2021)
Article
Meteorology & Atmospheric Sciences
Adrian M. Tompkins, Addisu G. Semie
Summary: The study shows that ocean feedbacks and diurnal cycle affect convective aggregation, with different ocean layer thickness impacting the onset of clustering, and changes in the circulation system leading to variations in convective rainfall patterns.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2021)
Article
Geosciences, Multidisciplinary
Simon P. de Szoeke, Tobias Marke, W. Alan Brewer
Summary: Sunlight warms sea surface temperature and increases atmospheric turbulence and mixed layer depth in the afternoon. The turbulent kinetic energy dissipation rate in the marine atmospheric mixed layer scales with surface buoyancy flux. Additionally, diurnal atmospheric convective turbulence mixes moisture from the ocean to form clouds in the afternoon.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Astronomy & Astrophysics
Andreas J. Weiss, Christian Moestl, Tanja Amerstorfer, Rachel L. Bailey, Martin A. Reiss, Juergen Hinterreiter, Ute A. Amerstorfer, Maike Bauer
Summary: A major update to the 3D coronal rope ejection technique is presented, incorporating an approximate Bayesian computation algorithm for modeling coronal mass ejection flux ropes. The improved implementation allows for large ensemble simulations and finding global best-fit model parameters. The technique also provides estimates on the uncertainty of model parameters using only a single in situ observation.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2021)
Article
Meteorology & Atmospheric Sciences
John A. Augustine, Gary B. Hodges
Summary: Analysis of surface solar irradiance and radiation budget data in the U.S. shows a period of increasing solar radiation from 1996 to 2012, followed by a decrease starting in 2013, primarily influenced by changes in cloud cover.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Astronomy & Astrophysics
Carlos R. Braga, Angelos Vourlidas
Summary: This study examines two coronal mass ejections observed from different viewpoints and distances relative to the Sun, finding that both CMEs propagate slowly and eastward of the Sun-Earth line. The second CME appears to accelerate and deflect westward within a certain range, in line with solar rotation speed.asyarakjsdrflksajdfkljsalkdfjlsadkdiruqweoruirqwpeiorqweiroqwieurqiweuriqwreiouqrewiuqwreiouroqiwreiuqwriouqweiurqiweuirqweiouroqwieuqwoieurqwieurqiweuroiqweuroiqrweuirqweiuoroqwieruqweoiruqwierqweoiruqwreiqrweiuqwroiuewqrweioruqweioruqwrioqwreiqwreuqwioreuqwiroiqwreoirueirese we look at the effect of PSP observations on CME kinematics due to its proximity to the Sun.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
M. Dumbovic, A. M. Veronig, T. Podladchikova, J. K. Thalmann, G. Chikunova, K. Dissauer, J. Magdalenic, M. Temmer, J. Guo, E. Samara
Summary: The event studied showed paired low-coronal eruptive signatures, including double-peaked flares, two coronal dimmings, and two EUV waves. Despite the complete chain of eruptive signatures, corresponding coronagraphic signatures were weak. Although the eruption was Earth-directed, heliospheric signatures were very weak with minimal Earth impact.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
O. Okike
Summary: This study focuses on the potential impact of Forbush decreases on the amplitude of cosmic ray diurnal variations, utilizing Fourier transform and different algorithms to investigate the influence of other factors on this relationship. The research reveals a significant correlation between CR diurnal anisotropy and FDs, supporting the idea that CR anisotropy is part of Forbush events.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Zexin Cheng, Shuo Yao, Shuyi Meng
Summary: This study uses Random Forest Classifier (RFC) to study the distinct signatures of prominence cold materials (PCs) compared to quiet solar wind (QSW) and ICMEs excluding cold materials (ICMEEs). The most important in situ signatures of PCs are lower (C6+/C5+)/(O7+/O6+), proton temperature, and He/O. The multifeature classifier shows an advantage in identifying them than solid criteria.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2023)
Article
Astronomy & Astrophysics
Yu Zhou, Noriko Y. Yamasaki, Shin Toriumi, Kazuhisa Mitsuda
Summary: We report the discovery of a geocoronal solar wind charge exchange (SWCX) event corresponding to a well-known coronal mass ejection (CME) event. The evidence for SWCX origin is provided by the non-thermal emission lines and the detection of a specific emission line. The SWCX signal coincides with the arrival of the magnetic cloud inside the CME, and there is a time delay after the proton flux fluctuation. The spacecraft's orbital modulation suggests that the emission arises close to the Earth.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2023)
Article
Geochemistry & Geophysics
A. A. Melkumyan, A. V. Belov, M. A. Abunina, N. C. Shlyk, A. A. Abunin, V. A. Oleneva, V. G. Yanke
Summary: This study investigated the Forbush decreases from 1997 to 2020 using data from the IZMIRAN database. The analysis compared different types of Forbush decreases and found that the strongest correlations with interplanetary disturbances were observed in coronal ejections from active regions accompanied by solar flares and having a magnetic cloud structure. Additionally, the distribution characteristics of parameters differed between sporadic and recurrent Forbush decreases.
GEOMAGNETISM AND AERONOMY
(2022)
