Article
Engineering, Marine
Sooyoul Kim, Tracey H. A. Tom, Masahide Takeda, Hajime Mase
Summary: This study introduces a framework for predicting nearshore waves using two machine learning techniques, GMDH and ANN, trained with three global wave datasets. The framework successfully transforms global waves into local nearshore waves, improving the accuracy of wave predictions for a specific location.
Article
Engineering, Aerospace
Sanja Danilovic
Summary: The chromosphere is a dynamic and complex layer with physical processes happening on small scales. Interpretation of chromospheric diagnostics requires realistic theoretical models. This study presents numerical experiments to showcase the current state of modeling chromospheric features and dynamics.
ADVANCES IN SPACE RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
R. T. Desai, M. P. Freeman, J. P. Eastwood, J. W. B. Eggington, M. O. Archer, Y. Y. Shprits, N. P. Meredith, F. A. Staples, I. J. Rae, H. Hietala, L. Mejnertsen, J. P. Chittenden, R. B. Horne
Summary: The study focuses on the response of the Earth's magnetopause to interplanetary shocks, showing three distinct phases of acceleration, compression, and large-scale damped oscillations. The simulations and theoretical predictions align on subsolar magnetopause oscillations, but with notable differences in amplitudes and damping rates. The research is crucial for space weather forecasting and offers a possible explanation for magnetopause oscillations observed following major interplanetary shocks.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Meteorology & Atmospheric Sciences
Qingxiang Liu, Alexander V. Babanin, W. Erick Rogers, Stefan Zieger, Ian R. Young, Jean-Raymond Bidlot, Tom Durrant, Kevin Ewans, Changlong Guan, Cagil Kirezci, Gil Lemos, Keith MacHutchon, Il-Ju Moon, Henrique Rapizo, Agustinus Ribal, Alvaro Semedo, Juanjuan Wang
Summary: Global wave hindcasts were developed using WAVEWATCH III model, showing promising results in validation. Three distinct hindcast datasets were produced and showed different characteristics based on wave parameters. Novel wave parameters were described and discussed in the study.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2021)
Article
Meteorology & Atmospheric Sciences
Jinhui Yang, Xiaojiang Zhang, Shaoying Li, Junqiang Song, Huizan Wang, Weimin Zhang, Difu Sun
Summary: In this article, the implementation of two-way coupling between the Yin-He Global Spectral Model (YHGSM) and the Wave Model (WAM) is described. The effects of the coupled system on meteorological aptitude are assessed statistically, showing a significant positive impact on both the northern (NthH) and southern hemisphere (SthH). The coupling of the WAM model benefits typhoon landfall prediction and exhibits more accuracy and stability in significant wave height (SWH) forecasts compared to the ECMWF model.
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Zachary L. Andalman, Matthew T. P. Liska, Alexander Tchekhovskoy, Eric R. Coughlin, Nicholas Stone
Summary: This study simulated the post-disruption phase of tidal disruption events when a star passes close to a supermassive black hole, revealing different phenomena between aligned and tilted TDE scenarios, which is crucial for understanding realistic tidal disruption processes.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Energy & Fuels
Ciro Alberghi, Luigi Candido, Raffaella Testoni, Marco Utili, Massimo Zucchetti
Summary: Liquid metal breeding blankets are extensively studied in nuclear fusion, with systems like Water Cooled Lithium Lead (WCLL) and Dual Coolant Lithium Lead (DCLL) proposing intense transverse magnetic fields causing magnetohydrodynamic effects altering flow features and increasing pressure drops. The reliability of COMSOL Multiphysics for MHD models is tested with benchmark problems, showing good agreement with reference solutions and suggesting its suitability for studying liquid metal MHD problems in fusion power reactors.
Article
Astronomy & Astrophysics
P. Kumar, F. K. Schinzel, G. B. Taylor, M. Kerr, D. Castro, U. Rau, S. Bhatnagar
Summary: We studied the recently discovered bow-shock pulsar wind nebula (PWN) associated with PSR J0002+6216 using X-ray and radio observations, revealing the unresolved morphology of the PWN. The radio observations showed a cometary tail trailing the pulsar, with multiple kinks along the emission, indicating possible density variations or turbulence in the interstellar medium. The size of the bow-shock region was consistent with the pulsar spin-down power, and an asymmetry was observed in both the radio and X-ray images.
ASTROPHYSICAL JOURNAL
(2023)
Article
Mathematics, Applied
Weixian Sun, Wenjuan Wang
Summary: In this article, we investigate the two-dimensional damped wave-type magnetohydrodynamic equations with fractional dissipation. We prove the global existence and uniqueness of solutions for small initial data in Sobolev spaces.
ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND PHYSIK
(2023)
Article
Acoustics
Tobias Thydal, Finnur Pind, Cheol-Ho Jeong, Allan P. Engsig-Karup
Summary: This paper proposes a comprehensive framework for experimental validation and uncertainty quantification in room acoustic simulations. The study finds that the input data uncertainty and the model form uncertainty are too high for the model to accurately predict several room acoustic parameters within just noticeable thresholds.
Article
Astronomy & Astrophysics
Ramesh Chandra, P. F. Chen, Pooja Devi, Reetika Joshi, Brigette Schmieder, Yong-Jae Moon, Wahab Uddin
Summary: The study found that the EUV wave event on February 11, 2010 contained a faster coronal Moreton wave and a slower EIT wave. The coronal Moreton wave was identified as a fast-mode wave, while the EIT wave was identified as an apparent propagation due to successive field-line stretching.
ASTROPHYSICAL JOURNAL
(2021)
Article
Geosciences, Multidisciplinary
Roman Brogli, Christoph Heim, Jonas Mensch, Silje Lund Sorland, Christoph Schar
Summary: The term pseudo-global warming (PGW) refers to a simulation strategy in regional climate modeling where large-scale changes in the climate system are directly imposed on a control regional climate simulation by modifying the boundary conditions. This approach offers benefits such as lower computational requirements and flexibility in simulation design. However, care must be taken not to compromise the physics of the regional climate model when implementing PGW simulations. To simplify the preparation of PGW simulations, a detailed methodology and companion software are provided.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2023)
Article
Physics, Fluids & Plasmas
E. Nardon, K. Saerkimaeki, F. J. Artola, S. Sadouni, the J. O. R. E. K. Team, J. E. T. Contributors
Summary: In this study, a JOREK 3D non-linear MHD simulation was conducted to investigate the disruption triggered by an argon massive gas injection in JET. The simulation successfully reproduced the relaxation of the plasma current profile, which is believed to be caused by Shear Alfven Wave propagation along stochastic field lines, as proposed by Boozer (2019, 2020).
Article
Geosciences, Multidisciplinary
Ryan J. Kramer, Haozhe He, Brian J. Soden, Lazaros Oreopoulos, Gunnar Myhre, Piers M. Forster, Christopher J. Smith
Summary: Through satellite observations, it was found that the all-sky instantaneous radiative forcing increased by 0.53 ± 0.11 W/m² from 2003 to 2018, mainly due to the rising concentrations of greenhouse gases and reductions in aerosol emissions. These results highlight the distinct fingerprints of anthropogenic activity in Earth's changing energy budget.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Astronomy & Astrophysics
J. H. Guo, Y. W. Ni, Z. Zhong, Y. Guo, C. Xia, H. T. Li, S. Poedts, B. Schmieder, P. F. Chen
Summary: Solar filament eruptions, flares, and coronal mass ejections (CMEs) are manifestations of dramatic energy releases in the magnetic field. Observational data-based modeling is a promising method to quantitatively study the underlying physical mechanisms. We developed a new data-driven radiative magnetohydrodynamic model and successfully reproduced the major observational characteristics of an X1.0 flare on October 28, 2021. Intriguing phenomena, such as the prediction of flare size and lifetime based on the outer stationary quasi-separatrix layers (QSLs), were also revealed.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2023)
Article
Astronomy & Astrophysics
Athanasios Papaioannou, Konstantin Herbst, Tobias Ramm, Edward W. Cliver, David Lario, Astrid M. Veronig
Summary: The potential impact of solar superflares on the radiation environment around Earth is assessed by studying the relationship between the peak proton flux and fluence of solar energetic particle (SEP) events and the solar flare soft X-ray peak photon flux.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
A. Dolliou, S. Parenti, F. Auchere, K. Bocchialini, G. Pelouze, P. Antolin, D. Berghmans, L. Harra, D. M. Long, U. Schuehle, E. Kraaikamp, K. Stegen, C. Verbeeck, S. Gissot, R. Aznar Cuadrado, E. Buchlin, M. Mierla, L. Teriaca, A. N. Zhukov
Summary: On May 30, 2020, small and short-lived extreme-UV (EUV) brightenings in the quiet Sun were observed, and their physical origin and possible impact on coronal or transition region (TR) heating are still unknown. This study aims to derive the statistical thermal evolution of these events in order to establish their coronal or transition region origin.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Bartosz Dabrowski, Katarzyna Mikula, Pawel Flisek, Christian Vocks, PeiJin Zhang, Jasmina Magdalenic, Alexander Warmuth, Diana E. Morosan, Adam Fron, Richard A. Fallows, Mario M. Bisi, Andrzej Krankowski, Gottfried Mann, Leszek Blaszkiewicz, Eoin P. Carley, Peter T. Gallagher, Pietro Zucca, Pawel Rudawy, Marcin Hajduk, Kacper Kotulak, Tomasz Sidorowicz
Summary: The general characteristics of type IIIb and U solar radio bursts with stria structure in the frequency range of 20-80 MHz were studied, including the source size and evolution in different altitudes, as well as the velocity and energy of electron beams responsible for their generation.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Andrea Francesco Battaglia, Wen Wang, Jonas Saqri, Tatiana Podladchikova, Astrid M. Veronig, Hannah Collier, Ewan C. M. Dickson, Olena Podladchikova, Christian Monstein, Alexander Warmuth, Frederic Schuller, Louise Harra, Saem Krucker
Summary: This study investigates the electron acceleration and energy release sites, as well as the mechanism by which accelerated electrons access interplanetary space, in the case of the SOL2021-02-18T18:05 event. By utilizing observations from Solar Orbiter, STEREO-A, and Earth, the researchers found that the onset of electron acceleration coincides with the coronal jet and radio type III bursts. They also discovered nonthermal hard X-ray emission and a curved trajectory of the ejected plasma during the microflare.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Lei Cheng, Ming Zhang, David Lario, Laura A. Balmaceda, Ryun Young Kwon, Christina Cohen
Summary: This paper presents a stochastic three-dimensional focused transport simulation of solar energetic particles (SEPs) produced by a data-driven coronal mass ejection (CME) shock. The model is applied to a SEP event observed by STEREO-A and Parker Solar Probe. The simulation results are well correlated with observations, suggesting that the SEP event could be explained by the acceleration of particles by a weak CME shock.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
L. Rodriguez, A. Warmuth, V Andretta, M. Mierla, A. N. Zhukov, D. Shukhobodskaia, A. Niemela, A. Maharana, M. J. West, E. K. J. Kilpua, C. Mostl, E. D'Huys, A. M. Veronig, F. Auchere, A. F. Battaglia, F. Benvenuto, D. Berghmans, E. C. M. Dickson, M. Dominique, S. Gissot, L. A. Hayes, A. C. Katsiyannis, E. Kraaikamp, F. Landini, Landini, J. Magdalenic, G. Mann, P. Massa, B. Nicula, M. Plana, O. Podladchikova, C. Sasso, F. Schuller, K. Stegen, R. Susino, M. Uslenghi, C. Verbeeck
Summary: We report on a solar-eruptive event that was observed simultaneously by three remote-sensing instruments onboard Solar Orbiter. The eruption was observed by the Extreme Ultraviolet Imager, the corresponding CME was recorded by the coronagraph Metis, and the associated X-ray flare was sampled by the Spectrometer/Telescope for Imaging X-rays. Analysis of the data from these instruments revealed the presence of continuous magnetic reconnection and heating even after the impulsive phase, which has not been reported before for a single event. These observations highlight the scientific potential of Solar Orbiter and other space-based assets.
Article
Astronomy & Astrophysics
Manon Jarry, Alexis P. Rouillard, Illya Plotnikov, Athanasios Kouloumvakos, Alexander Warmuth
Summary: This study analyzes the geometrical and kinematic properties of coronal and interplanetary shock waves produced by CMEs. The results show the evolution of the shock wave's shape, expansion speeds, and their correlation with the underlying flare activity. These findings contribute to improving space weather forecasting and understanding the eruption process of CMEs.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Marilena Mierla, Hebe Cremades, Vincenzo Andretta, Iulia Chifu, Andrei N. Zhukov, Roberto Susino, Frederic Auchere, Angelos Vourlidas, Dana-Camelia Talpeanu, Luciano Rodriguez, Jan Janssens, Bogdan Nicula, Regina Aznar Cuadrado, David Berghmans, Alessandro Bemporad, Elke D'Huys, Laurent Dolla, Samuel Gissot, Giovanna Jerse, Emil Kraaikamp, David M. Long, Benjamin Mampaey, Christian Moestl, Paolo Pagano, Susanna Parenti, Matthew J. West, Olena Podladchikova, Marco Romoli, Clementina Sasso, Koen Stegen, Luca Teriaca, William Thompson, Cis Verbeeck, Emma Davies
Summary: In this study, three prominence eruptions associated with coronal mass ejections were analyzed using multiple instruments. The morphology, direction of propagation, and 3D properties were investigated, and two 3D reconstruction methods were successfully applied. The study highlights the importance of multi-perspective observations in studying the morphology, source regions, and associated coronal mass ejections of prominence eruptions.
Article
Multidisciplinary Sciences
X. Cheng, E. R. Priest, H. T. Li, J. Chen, G. Aulanier, L. P. Chitta, Y. L. Wang, H. Peter, X. S. Zhu, C. Xing, M. D. Ding, S. K. Solanki, D. Berghmans, L. Teriaca, R. Aznar Cuadrado, A. N. Zhukov, Y. Guo, D. Long, L. Harra, P. J. Smith, L. Rodriguez, C. Verbeeck, K. Barczynski, S. Parenti
Summary: The study reveals persistent magnetic null-point reconnection in the solar corona at a scale of about 390 km through extreme ultraviolet observations. The observed reconnection generates high-temperature plasma and transfers mass and energy to the overlying corona, potentially contributing to the generation of spiral jets.
NATURE COMMUNICATIONS
(2023)
Article
Astronomy & Astrophysics
Evangelos Paouris, Angelos Vourlidas, Athanasios Kouloumvakos, Athanasios Papaioannou, Vamsee Krishna Jagarlamudi, Timothy Horbury
Summary: The coronal mass ejection on September 5, 2022 was the fastest and one of the largest CMEs observed so far. It is of great significance for space weather studies, as it may result in a high-energy particle event that requires careful attention.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Abril Sahade, Angelos Vourlidas, Laura A. A. Balmaceda, Mariana Cecere
Summary: We study the low corona evolution of the Cartwheel coronal mass ejection (CME; 2008 April 9) using reconstruction and magnetohydrodynamic simulations. We find a pseudostreamer structure with a null point that may be responsible for the complex evolution of the magnetic flux rope (MFR) at the initial phase. By setting up a similar magnetic configuration in a numerical simulation, we reproduce the observed behavior and validate the importance of the pseudostreamer null point.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Guillermo Stenborg, Evangelos Paouris, Russell A. Howard, Angelos Vourlidas, Phillip Hess
Summary: The Parker Solar Probe mission studies the solar corona at distances closer than 20 solar radii. Using images from the PSP's Wide-field Imager, this work examines the causes of brightness reductions in the corona during the probe's rapid transit through perihelia. The study finds that the presence of coronal holes and energetic coronal mass ejection events directly correlate with the observed brightness depletions, attributed to the loss of free electrons and interplanetary dust.
ASTROPHYSICAL JOURNAL
(2023)
Article
Geosciences, Multidisciplinary
Glyn A. Collinson, Heli Hietala, Ferdinand Plaschke, Tomas Karlsson, Lynn B. Wilson III, Martin Archer, Markus Battarbee, Xochitl Blanco-Cano, Cesar Bertucci, David Long, Merav Opher, Nick Sergis, Claire Gasque, Terry Liu, Savvas Raptis, Sofia Burne, Rudy Frahm, Tielong Zhang, Yoshifumi Futaana
Summary: This study presents evidence of the existence of shocklets and SLAMS in the foreshock region of Venus, comparing them with similar structures observed near Earth. These structures may be rarer on Venus, but occur at a frequency of at least 14%. These findings are important for understanding the space environment around Venus and the differences between planets.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Multidisciplinary Sciences
L. P. Chitta, A. N. Zhukov, D. Berghmans, H. Peter, S. Parenti, S. Mandal, R. Aznar Cuadrado, U. Schuehle, L. Teriaca, F. Auchere, K. Barczynski, E. Buchlin, L. Harra, E. Kraaikamp, D. M. Long, L. Rodriguez, C. Schwanitz, P. J. Smith, C. Verbeeck, D. B. Seaton
Summary: Researchers observed jets in a coronal hole, which are driven by magnetic reconnection and have high kinetic energy. These jets may play a crucial role in sustaining the solar wind.
Article
Andrology
Lorena Rodriguez-Paez, Charmina Aguirre-Alvarado, German Chamorro-Cevallos, Alcantara-Farfan Veronica, Calderon-Espinosa Sandra Irel, Castillo-Perez Hugo, Carlos Armando Garcia-Perez, Guadalupe Elizabeth Jimenez-Gutierrez, Joaquin Cordero-Martinez
Summary: This study evaluated the effects of spermine, spermidine, and putrescine on sperm motility, capacitation, and acrosome reaction. The results showed that polyamines significantly decreased these parameters and may act by inhibiting the activity of sAC. Furthermore, polyamines also caused a decrease in cAMP concentration.
SYSTEMS BIOLOGY IN REPRODUCTIVE MEDICINE
(2023)