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Publication date: 1 February 2025

Source: Advances in Space Research, Volume 75, Issue 3

Author(s): Swati Chowdhury, R.K. Choudhary, D. Bala Subrahamanyam

Publication date: 1 February 2025

Source: Advances in Space Research, Volume 75, Issue 3

Author(s): Ihsan Naufal Muafiry, Irwan Meilano, Dudy D. Wijaya, Erman Sentürk, Kosuke Heki

Publication date: 1 February 2025

Source: Advances in Space Research, Volume 75, Issue 3

Author(s): Leonid F. Chernogor, Marya Yu. Holub

Publication date: 1 February 2025

Source: Advances in Space Research, Volume 75, Issue 3

Author(s): Hanna Dühnen, Rajesh Vaishnav, Christoph Jacobi, Erik Schmölter, Jens Berdermann

Publication date: 1 February 2025

Source: Advances in Space Research, Volume 75, Issue 3

Author(s): Anna Belehaki, Ingemar Häggström, Tamas Kiss, Ivan Galkin, Anders Tjulin, Mária Miháliková, Carl-Fredrik Enell, Gabriel Pierantoni, Yin Chen, Gergely Sipos, Sean Bruinsma, Viviane Pierrard, David Altadill, Antoni Segarra, Víctor Navas-Portella, Emanuele Pica, Luca Spogli, Lucilla Alfonsi, Claudio Cesaroni, Vicenzo Romano

Publication date: 1 February 2025

Source: Advances in Space Research, Volume 75, Issue 3

Author(s): Xiang Li, Wanchun Chen, Qiangui Sun, Jie Gao, Huiguang Zhao, Liang Yang

Publication date: 1 February 2025

Source: Advances in Space Research, Volume 75, Issue 3

Author(s): Zhenghao Zhang, Yong Huang, Peng Yang, Yanling Chen, Xiaolin Jia

Publication date: 1 February 2025

Source: Advances in Space Research, Volume 75, Issue 3

Author(s): Robert A. Bettinger, Alexander M. Petrocelli, Nicholas Reid, Wade Lawrie, Nathan R. Boone

Publication date: 1 February 2025

Source: Advances in Space Research, Volume 75, Issue 3

Author(s): Reza Ahmadvand, Sarah Sharif, Yaser Banad

Publication date: 1 February 2025

Source: Advances in Space Research, Volume 75, Issue 3

Author(s): Li Pei, Liu Xiang, Cai Guoping, Liu Fucheng, Sun Jun, Zhu Dongfang

Publication date: 1 February 2025

Source: Advances in Space Research, Volume 75, Issue 3

Author(s): Masahiro Fujita, Hajime Yano, Yuichi Tsuda

SummaryThe causes of intraplate volcanoes in northeastern (NE) China and, in particular, how asthenospheric upwelling interacts with the lithosphere remain poorly constrained. In this study, we use teleseismic data to measure the phase and group velocities of Rayleigh and Love waves, and invert for the shear wave velocity and radial anisotropy within the crust and uppermost mantle. Our results show that there are significant low-velocity anomalies and negative radial anisotropy to the northeast of Changbaishan, suggesting an asthenospheric melt reservoir. This is underlain by mantle upwelling, with regional lithospheric structure focusing melt beneath the volcano. In addition, our results show a high-velocity body in the mantle beneath the southwestern Songliao Basin. This exhibits negative radial anisotropy at its margins, suggesting vertical flow. We suggest that lithospheric delamination here may drive intraplate volcanism beneath the Great Xing'an range.

SummaryLong-period underside SS wave reflections have been widely used to furnish global constraints on the presence and depth of mantle discontinuities and to document evidence for their origins, e.g., mineral phase-transformations in the transition zone, compositional changes in the mid-mantle, and dehydration-induced melting above and below the transition zone. For higher-resolution imaging, it is necessary to separate the signature of the source wavelet (SS arrival) from that of the distortion caused by the mantle reflectivity (SS precursors). Classical solutions to the general deconvolution problem include frequency-domain or time-domain deconvolution. However, these algorithms do not easily generalize when (1) the reflectivity series is of a much shorter period compared to the source wavelet, (2) the bounce point sampling is sparse, or (3) the source wavelet is noisy or hard to estimate. To address these problems, we propose a new technique called SHARP-SS: Sparse High-Resolution Algorithm for Reflection Profiling with SS waves. SHARP-SS is a Bayesian deconvolution algorithm that makes minimal a-priori assumptions on the noise model, source signature, and reflectivity structure. We test SHARP-SS using real data examples beneath the NoMelt Pacific Ocean region. We recover a low-velocity discontinuity at a depth of ∼69 ± 4 km which marks the base of the oceanic lithosphere, consistent with previous work derived from surface waves, body wave conversions, and ScS reverberations. We anticipate high-resolution fine mantle stratification imaging using SHARP-SS at locations where seismic stations are sparsely distributed.

A new study introduces the Community Land Active Passive Microwave Radiative Transfer Modeling platform (CLAP)—a unified multi-frequency microwave scattering and emission model designed to revolutionize land surface monitoring. This cutting-edge platform combines active and passive microwave signals to offer potentially accurate simulations of soil moisture and vegetation conditions.

In the delicate balancing act between human development and protecting the fragile natural world, sand is weighing down the scales on the human side.

The impending loss of the Amazon rainforest due to deforestation has concerned scientists, activists, and citizens all over the globe. Natural habitats sustaining the region's incomparable biodiversity and important carbon stores are at stake, with far-reaching implications for the global climate.

A new USC study reveals a dramatic surge in building collapses in the ancient Egyptian port city of Alexandria, directly linked to rising sea levels and seawater intrusion.

A study published in Geophysical Research Letters has challenged the conventional understanding of the relationship between global warming and ocean evaporation. A research team from the Institute of Geographic Sciences and Natural Resources Research of the Chinese Academy of Sciences discovered a phenomenon that, despite rising sea surface temperatures, global ocean evaporation has decreased over the past decade.

Author(s): B. Arnold, J. Daligault, D. Saumon, Antoine Bédard, and S. X. Hu

Nucleation in the supercooled Yukawa system is relevant for addressing current challenges in understanding a range of crystallizing systems including white dwarf (WD) stars. We use both brute force and seeded molecular dynamics simulations to study homogeneous nucleation of crystals from supercooled…

[Phys. Rev. E 111, 025206] Published Fri Feb 21, 2025

Author(s): C. Ruyer, P. Loiseau, D. Turnbull, and V. Tikhonchuk

The modeling of a spatially incoherent laser beam remains a central problem of the parametric instabilities in the context of inertial confinement fusion. This paper gives a simplified and comprehensive overview of the recent analytical developments regarding the modeling of these laser beams and a …

[Phys. Rev. E 111, 025207] Published Fri Feb 21, 2025