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Discovery of Physically Interpretable Wave Equations Surv. Geophys. (IF 4.9) Pub Date : 2024-09-26 Shijun Cheng, Tariq Alkhalifah
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The 3D Crustal Structure of the Wilkes Subglacial Basin, East Antarctica, Using Variation of Information Joint Inversion of Gravity and Magnetic Data J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-25 Maximilian Lowe, Tom Jordan, Max Moorkamp, Jörg Ebbing, Chris Green, Mareen Lösing, Teal Riley, Robert Larter
Direct geological information in Antarctica is limited to ice free regions along the coast, high mountain ranges, or isolated nunataks. Therefore, indirect methods are required to reveal subglacial geology and heterogeneities in crustal properties, which are critical steps toward interpreting geological history. We present a 3D crustal model of density and susceptibility distribution in the Wilkes
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The Effect of Hydrate Formation Conditions on the Mechanics of Laboratory Methane Hydrate-Bearing Sediments J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-25 L. Rake, S. Pinkert
The mechanics of methane hydrate-bearing sediments (MHBS) have been broadly investigated over recent years in the context of methane-gas production or climate-change effects. Their mechanical investigation has mainly been carried out using models constructed from experimental data obtained for laboratory-formed MHBS. Along with the dominant effects of hydrate saturation and morphology within the host
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Measurement of the Static Nonlinear Third-Order Elastic Moduli of Rocks: Problems and Applicability J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-25 Wenjing Wang, Douglas R. Schmitt
The third-order elastic (TOE) model has been used to describe the widely observed nonlinear mechanical behaviors of earth materials. In addition to linear elastic constants (λ, μ), three nonlinear elastic moduli (A, B, C) are required for isotropic rocks. Contrary to previous research on dynamic TOE moduli, this study followed the protocol to measure strain and stress under uniaxial and hydrostatic
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Constraining Regional Hydrological Sensitivity Over Tropical Oceans Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-25 Jie He, Yi Deng, Boniface Fosu, Yen-Heng Lin, Kezhou Lu
Regional hydrological sensitivity (i.e., precipitation change per degree local surface warming) contributes substantially to the uncertainty in future precipitation projections over tropical oceans. Here, we investigate the sensitivity of relative precipitation (P*, precipitation divided by the basin average precipitation) to local sea surface temperature (SST) change by dissecting it into three components
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Scattering Evidence for an Ancient Subducted Slab Using the Unique Raypath P*PKP Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-24 Hao Zhang, John E. Vidale, Wei Wang
We observe high-frequency scatterers consistent with the interpretation of a tabular high-velocity structure under the Indian Ocean as an ancient subducted slab. We use a previously rarely used raypath, P waves scattered in the slab into PKP waves (P∗${\mathrm{P}}^{\ast }$PKP), from 12 earthquakes and explosions in five locations recorded on the antique LASA (Large Aperture Seismic Array) located in
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Record High March 2024 Arctic Total Column Ozone Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-25 Paul A. Newman, Leslie R. Lait, Natalya A. Kramarova, Lawrence Coy, Stacey M. Frith, Luke D. Oman, Sandip S. Dhomse
Observations of March 2024 Arctic (63°N–90°N) total column ozone set a record high of 477 Dobson Units (DU) against the 1979–2023 satellite era time series. It was about 60 DU higher than average and 6 DU higher than the previous March 1979 471 DU record. Daily Arctic ozone was above average for every day in March 2024, and set record highs from 11–26 March 2024. Microwave Limb Sounder data show this
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Mars Soil Temperature and Thermal Properties From InSight HP3 Data Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-24 T. Spohn, N. Müller, J. Knollenberg, M. Grott, M. P. Golombek, A.-C. Plesa, V. T. Bickel, P. Morgan, C. Krause, D. Breuer, S. E. Smrekar, W. B. Banerdt
Diurnal and seasonal variations in soil and surface temperature measured with the HP3${\mathrm{H}\mathrm{P}}^{3}$ thermal probe and radiometer of NASA's InSight Mars mission are reported. At a representative depth of 10–20 cm, an average temperature of 217.5 K was found, varying by 5.3–6.7 K during a sol and by 13.3 K during the seasons. From the damping of the temperature variation with depth and
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Issue Information J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-25
No abstract is available for this article.
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Modeling Subduction With Extremely Fast Trench Retreat J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-23 Diandian Peng, Dave R. Stegman
The Tonga-Kermadec subduction zone exhibits the fastest observed trench retreat and convergence near its northern end. However, a paradox exists: despite the rapid trench retreat, the Tonga slab maintains a relatively steep dip angle above 400 km depth. The slab turns flat around 400 km, then steepening again until encountering a stagnant segment near 670 km. Despite its significance for understanding
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Frictional Properties of Simulated Fault Gouges Subject to Normal Stress Oscillation and Implications for Induced Seismicity J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-20 Bowen Yu, Jianye Chen, Christopher J. Spiers, Shengli Ma, Miao Zhang, Wenbo Qi, Hao Chen
Under critical conditions where experimental fault slip exhibits self-sustained oscillation, effects of normal stress oscillation (NSO) on fault strength and stability remain poorly understood, as do potential effects of NSO on natural and induced seismicity. In this study, we employed double direct-shear testing to investigate the frictional behavior of a synthetic, slightly velocity-weakening (SVW)
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Analysis of Aerosol Optical Mixing Using the EOMOS Model From Typical AERONET Sites Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-24 Gang Yan, Bingqiang Sun, Chenxu Gao, Yunqian Chen, Jianmin Chen
Satellite remote sensing predominantly employs optical properties for aerosol classification, often neglecting aerosol mixing and lacking validation accuracy. This study defines five aerosol types: marine, continental, dust, urban-industrial, and biomass-burning. Proposing the external optical mixing optimization solver (EOMOS) model based on the external mixing assumption, the model's accuracy is
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Thermochemistry of the Mantle Transition Zone Beneath the Western Pacific Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-24 Lauren Waszek, Rashni Anandawansha, Justin Sexton, Benoit Tauzin
The Earth's mantle transition zone has significant control on material flux between upper and lower mantle, thus constraining its properties is imperative to understand dynamic processes and circulation patterns. Global seismic data sets to study the transition zone typically display highly uneven spatial distribution. Therefore, complementary geometries are essential to improve knowledge of physical
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Modeling Climate and Tectonic Controls on Bias in Measured River Incision Rates Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-24 Clarke DeLisle, Brian J. Yanites
Rates of land surface processes provide insights into climatic and tectonic influences on topography. Bedrock incision rates are estimated by dating perched landforms such as strath terraces, assuming a constant bedrock incision rate from terrace abandonment to the next terrace level or present river level. These estimates express biases from the stochastic nature of sediment and water discharge in
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On the Spirality of the Asymmetric Rain Field of Tropical Cyclones Under Vertical Wind Shear Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-24 K. H. Lau, R. Toumi
The downshear-left enhancement of tropical cyclone rainfall has been demonstrated previously, but the radial dependence of this effect was not analyzed in detail. This study quantifies the progressive upwind shift of the wavenumber-1 maximum rain position with radius relative to the vertical wind shear direction. This shift is visualized as a distinctive upwind spiral of the maximum. It is shown that
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Integrated analysis of the Neogene–Quaternary Valdera‐Volterra Basin (Northern Apennines). Evidence for composite development of hinterland basins Basin Res. (IF 2.8) Pub Date : 2024-09-24 Giovanni Poneti, Marco Benvenuti, Nicola Scarselli, Jonathan Craig, Federico Sani
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Quantifying Uncertainty in ML-Derived Atmosphere Remote Sensing: Hourly Surface NO2 Estimation With GEMS Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-20 Qin He, Kai Qin, Jason Blake Cohen, Ding Li, Jhoon Kim
Accurate estimation of nitrogen dioxide (NO2) levels at high spatio-temporal resolution is crucial for atmospheric research and public health assessments. This study introduces a novel machine learning (ML) framework enhanced with uncertainty quantification (UQ) to predict hourly NO2 concentrations over East Asia. Benefiting from tropospheric NO2 columns from the Geostationary Environment Monitoring
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How Does Plastic Litter Accumulate in Submarine Canyons? Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-21 Yuping Yang, Dawei Wang, Benjamin Kneller, Guangfa Zhong, Kaiqi Yu, Minghan Wang, Jingping Xu
Manned submersible dives in the northwest South China Sea encountered substantial amounts of plastic litter accumulated at the base of scours along the floor of a submarine canyon, which may associate with the depositional behaviors of turbidity currents. In this study, we conduct numerical simulations using field-scale bathymetry to investigate the relationship between the canyon floor morphology
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Upwind Moisture Controls on Interannual Variations of Precipitation and Vegetation in China's Drylands Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-20 Yan Li, Ru Xu, Zhao Yang, Sha Zhou, Mengqian Lu, Huiqing Lin, Shuangshuang Zi, Ruijie Su
Dryland precipitation depends on upwind and local moisture sources via moisture recycling. How upwind moisture variations affect interannual variations of downwind precipitation and vegetation in China's drylands remains unclear. We used high-resolution moisture tracking data sets and found terrestrial moisture (93%) was the dominant moisture source for China's drylands, especially from drylands themselves
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Meridional Path of ENSO Impact on Following Early-Summer North Pacific Climate Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-21 Lingfeng Tao, Xiu-Qun Yang, Linyuan Sun, Xuguang Sun, Jiabei Fang, Danping Cai, Botao Zhou, Haishan Chen
Prior research extensively investigates the delayed influence of El Niño-Southern Oscillation (ENSO) events on subsequent summer climates, with persistent sea surface temperature anomalies (SSTAs) in remote tropical oceans serving as crucial pathways. This study unveils a previously overlooked midlatitude pathway. During the developing winter, El Niño events induce basin-scale cold SSTAs in the central
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Overriding Plate Deformation Controls Inferences of Interseismic Coupling Along the Himalayan Megathrust J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-21 Dibyashakti Panda, Eric O. Lindsey
The seismic hazard along the Himalayan arc remains a focus of discussion due to its huge potential societal impact. Taking advantage of modern, dense geodetic observations, several attempts have been made to provide a clear picture of the present-day rate of strain accumulation caused by interseismic coupling on the Main Himalayan Thrust (MHT). However, there are differing opinions regarding the interpretation
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New Heat Flow Measurements Offshore Montserrat: Advective Heat Flow Detected via MeBo Borehole Temperature Logging J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-20 Matthew J. Hornbach, Michel Kühn, Tim Freudenthal, Jordan Graw, Christian Berndt, Katrin Huhn-Frehers, S. F. L. Watt, Benjamin J. Phrampus, Warren T. Wood
New heat flow measurements collected at the Lesser Antilles Arc using a Hybrid Lister-Outrigger probe and a new logging-while-tripping MeBo70 drilling approach provide the first high-resolution (meter-to-cm-scale) temperature-depth measurements across the Lesser Antilles volcanic arc and offer new insight into heat and fluid transfer at a convergent oceanic margins. At multiple sites where logging-while-tripping
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Physics-Based Forecasts of Eruptive Vent Locations at Calderas J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-21 L. Mantiloni, E. Rivalta, K. R. Anderson, T. Davis, L. Passarelli
Constraining stresses in the Earth's crust in volcanic regions is critical for understanding many mechanical processes related to eruptive activity. Dike pathways, in particular, are shaped by the orientation of principal stress axes. Therefore, accurate models of dike trajectories and future vent locations rely on accurate estimates of stresses in the subsurface. This work presents a framework for
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CSRM-1.0: A China Seismological Reference Model J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-19 Xiao Xiao, Shihua Cheng, Jianping Wu, Weilai Wang, Li Sun, Xiaoxin Wang, Jiayu Ma, Yinghua Tong, Xiaofeng Liang, Xiaobo Tian, Hongyi Li, Qi-Fu Chen, Sheng Yu, Lianxing Wen
High-resolution seismic model is crucial for advancing our understandings on geological processes and enhancing seismic hazard mitigation programs. We construct a high-resolution China Seismological Reference Model (CSRM-1.0) in the top 100 km of the crust and uppermost mantle in continental China following a top-down construction process. The employed seismic constraints include P-wave polarization
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CO2 Dependence in Global Estimation of All-Sky Downwelling Longwave: Parameterization and Model Comparison Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-20 Koh Kawaguchi, Callum J. Shakespeare, Michael L. Roderick
The downwelling longwave radiation at the surface (DLR) is a key component of the Earth's surface energy budget. We present a novel set of equations that explicitly account for both clouds and the CO2$\mathrm{C}{\mathrm{O}}_{\mathrm{2}}$ effect to calculate the all-sky DLR. This paper first extends the clear-sky DLR model of Shakespeare and Roderick (2021, https://doi.org/10.1002/qj.4176) to include
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First High-Precision U–Pb CA–ID–TIMS Age of the Chuanlinggou Formation, North China Craton: Implications for Global Correlations of Black Shales and the Statherian/Calymmian Boundary Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-20 Shuan-Hong Zhang, Sandra L. Kamo, Richard E. Ernst, Guo-Hui Hu, Qi-Qi Zhang, Hafida El Bilali, Yue Zhao
The Chuanlinggou Formation in the northern North China preserves the world's earliest multicellular eukaryote microfossils. Here we present a high-precision zircon U–Pb CA–ID–TIMS age of 1,641.7 ± 1.2 Ma for a tuff layer within the black shales of the Chuanlinggou Formation. The new age is similar to those obtained for black shales from the Cuizhuang Formation in the southern North China, and the Barney
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Whistler Waves and Two-Stream Instabilities at Non-Stationary Quasi-Perpendicular Collisionless Shocks Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-21 Horia Comişel, Octav Marghitu
Upstream propagating waves are observed to correlate with the reflected ions in the foot of a high Mach number quasi-perpendicular collisionless shock. The respective wavefronts show time varying amplitude matching the variation of the reflected ions and the shock reformation cycles. We interpret this process in terms of the fast two-stream instability and investigate the results of the PIC simulation
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Refined Estimates of Global Ocean Deep and Abyssal Decadal Warming Trends Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-19 Gregory C. Johnson, Sarah G. Purkey
Deep and abyssal layer decadal temperature trends from the mid-1980s to the mid-2010s are mapped globally using Deep Argo and historical ship-based Conductivity-Temperature-Depth (CTD) instrument data. Abyssal warming trends are widespread, with the strongest warming observed around Antarctic Bottom Water (AABW) formation regions. The warming strength follows deep western boundary currents transporting
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Seismic Evidence of Basin Development in NE Tibetan Plateau in Response to Deep Crustal Dynamics From Joint Inversion of Rayleigh Wave Ellipticity and Phase Velocity Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-21 Pengfei Ren, Zhen Guo, Yiduo Liu, Bin Luo, Xiaoyang Wu
The NE Tibet experienced complex and distinct basin developments and uplifts in different areas. However, the reasons for such distinct surface deformation and their relationship to deep crustal geodynamic processes are not well understood. Here, we obtain a crust model of NE Tibet by jointly inverting Rayleigh wave ellipticity and phase velocity. Our results reveal that deep crustal strength contrasts
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Quantifying the Amplifying Effect of the Winter North Pacific Oscillation on the Subsequent ENSO Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-20 Suqiong Hu, Masahiro Watanabe, Wenjun Zhang, Tomoki Iwakiri, Feng Jiang
Atmospheric variability associated with the winter North Pacific Oscillation (NPO), preceding El Niño-Southern Oscillation (ENSO) events by about 1 year, is driven mainly by the tropical Pacific sea surface temperature (SST) anomalies but may also affect the subsequent ENSO. To isolate the latter, we conduct an idealized hindcast experiment using a climate model MIROC6, in which the NPO-related surface
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Sunward Oxygen Ion Fluxes and the Magnetic Field Topology at Mars From Hybrid Simulations Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-21 E. Dubinin, R. Modolo, F. Leblanc, M. Pätzold, N. Romanelli
It is commonly believed that because of the direct solar wind interaction with the Martian atmosphere/ionosphere, the planet could have lost a significant part of its atmosphere. Closed field lines of the crustal magnetic field can weaken a transport of the ionospheric ions to the tail. Reconnection of the interplanetary magnetic field lines draping around Mars and the crustal magnetic field can also
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The Global Energy Balance as Represented in Atmospheric Reanalyses Surv. Geophys. (IF 4.9) Pub Date : 2024-09-21 Martin Wild, Michael G. Bosilovich
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Structural Evolution of Basaltic Melts in the Deep Earth: Insights From High-Pressure Sound Velocity of Glass J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-20 Charlotte Trubowitz, Motohiko Murakami, Sylvain Petitgirard, Christian Liebske, Catherine McCammon
The densification mechanisms of silicate melts under high pressure are of key interest in understanding the evolution of the early Earth and its present-day internal structure. Here, we report Brillouin spectroscopy-derived transverse acoustic wave velocities (VS)$\left({V}_{S}\right)$ from a basaltic glass at high pressures up to 163 GPa and ambient temperature to provide insight into pressure-induced
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MFF-DenseNet: Densely Connected Convolutional Network With Multi-Scale Feature Fusion for Magnetotelluric Noise Suppression J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-19 Jiayu Wang, Jin Li, Hui Zhou, Xiaolin Zhao, Jingtian Tang
Magnetotelluric (MT) is a geophysical technique for detecting subsurface electrical structures. However, MT data collected in areas with frequent human activity often encounter various types of electromagnetic (EM) noise, which can mask or distort the signals we aim to analyze. Over the past decades, data processing methods based on deep learning has become the focus of multiple disciplines. Training
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Reconstruction of Magma Plumbing System and Regional Magmatic Processes via Chemical and Structural Zoning of Biotite in Rhyolite from Long Valley, CA J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-19 Jiaxin Xi, Yiping Yang, Huifang Xu, Haiyang Xian, Fabin Pan, Shan Li, Shuo Xue, Yonghua Cao, Jianxi Zhu, Hongping He
Minerals with compositional zoning in volcanic products are widely used to decipher the history of magmatic evolution. However, structural information, which reflects physical conditions and crystallization equilibrium, has often been overlooked. This study presents the first report on the structural zoning of deep-derived biotite phenocrysts through investigations of metaluminous rhyolite from Long
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A Reference Model of Crustal Thickness and Vp/Vs of Western Canada J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-19 Quan Zhang, Yunfeng Chen, Yu Jeffrey Gu, Claire Currie, Pascal Audet, Hersh Gilbert, Derek L. Schutt, Gabriela Fernández-Viejo, Yangkang Chen
The Canadian Cordillera marks a transition region from the current plate boundary through the Phanerozoic Cordilleran orogen to the Precambrian cratons. Knowledge of the subsurface structure of western Canada has been greatly advanced by seismological investigations during the past two decades, pioneered by the Lithoprobe project and, more recently, by regional passive seismic arrays. In this study
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Branched Conduit Structure Beneath the Active Craters of Sakurajima Volcano Inferred From Muography J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-20 László Oláh, Gergő Hamar, Takao Ohminato, Hiroyuki K. M. Tanaka, Dezső Varga
Observing in-conduit physical mechanism underlying the switching of eruptive activity between the craters of multi-vent volcanoes could contribute to hazard assessment at these complex volcanic edifices. We performed monitoring of mass density changes beneath two active craters of Sakurajima volcano in Kyushu, Japan between September 2018 and July 2023 with cosmic-ray muography. From December 2022
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Opposite Variations for Pore Pressure on and off the Fault During Simulated Earthquakes in the Laboratory J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-20 Dong Liu, Nicolas Brantut, Franciscus M. Aben
We measured the spatiotemporal evolution of pore pressure on- and off-fault during failure and slip in initially intact Westerly granite under triaxial conditions. The pore pressure perturbations in the fault zone and the surrounding bulk presented opposite signs upon shear failure, resulting in large pore pressure gradients over small distances (up to 10 MPa/cm). The on-fault pore pressure dropped
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Validation of Ps-P Tomography for Obtaining 3D Crustal VP/VS With Small-N Data Sets: An Application to the Mount St. Helens Magmatic System J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-19 Daniel Evan Portner, Jonathan R. Delph, Eric Kiser, Geoffrey A. Abers, Alan Levander, Guanning Pang
The high sensitivity of VP/VS to the presence of melt makes images of VP/VS structure particularly useful in magmatic systems, but detailed three-dimensional models of VP/VS structure in magmatic systems are often restricted to the upper crust where there is a concentration of seismic sources used for imaging. Ps-P tomography is a new technique that has been used to image three-dimensional crustal-scale
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Internal Variability Dominated the Extreme Cold Wave Over North America in December 2022 Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-18 Hainan Gong, Kangjie Ma, Lin Wang
In December 2022, North America experienced an unprecedented extreme cold event. However, the underlying physical mechanisms of this cold wave, and the extent to which it is driven by internal variability or external forcing, are not fully understood. Using ERA5 reanalysis data and the HadGEM3-A-N216 attribution simulations, we identified internal variability as the main cause, contributing −5.14 K
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Finite element analysis of early deformations of carbonate platforms driven by differential compaction of basinal unit Basin Res. (IF 2.8) Pub Date : 2024-09-20 Niccolò Menegoni, Ludovico Manna, Matteo Maino, Cesare Perotti
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High-Pressure Melting Experiments of Fe3C and a Thermodynamic Model of Fe-C Liquids for the Earth's Core J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-18 T. Komabayashi, C. McGuire, S. Thompson, G. D. Bromiley, A. Bravenec, A. Pakhomova
Melting experiments of Fe3C were conducted to 85 GPa in laser-heated diamond anvil cells with in situ X-ray diffraction and post-experiment textural observation. From the determined pressure-temperature conditions of the melting curve for Fe3C, together with literature data on the melting point of diamond and eutectic point of the system Fe-Fe3C/Fe7C3 under high pressures, we established a self-consistent
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Spatial Distribution in Surface Aerosol Light Absorption Across India Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-19 Taveen S. Kapoor, Chimurkar Navinya, Adishree Apte, Nishit J. Shetty, Pradnya Lokhande, Sujit Singh, Sadashiva Murthy B. M., Meena Deswal, Jitender S. Laura, Akila Muthalagu, Asif Qureshi, Ankur Bhardwaj, Ramya Sunder Raman, Yang Lian, G. Pandithurai, Pooja Chaudhary, Baerbel Sinha, Shahadev Rabha, Binoy K. Saikia, Tanveer Ahmad Najar, Arshid Jehangir, Sauryadeep Mukherjee, Abhijit Chatterjee, Harish
Light-absorbing carbonaceous aerosols that dominate atmospheric aerosol warming over India remain poorly characterized. Here, we delve into UV-visible-IR spectral aerosol absorption properties at nine PAN-India COALESCE network sites (Venkataraman et al., 2020, https://doi.org/10.1175/bams-d-19-0030.1). Absorption properties were estimated from aerosol-laden polytetrafluoroethylene filters using a
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Asymmetrical Solar Wind Deflection in the Martian Magnetosheath Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-19 Shibang Li, Haoyu Lu, Jinbin Cao, Xiaoshu Wu, Xiaoxin Zhang, Nihan Chen, Yihui Song, Jianxuan Wang, Yuchen Cao, Jianing Zhao
As incident solar wind encounters the martian upper atmosphere, it undergoes deflection particularly in the magnetosheath. However, the plasma flow exhibits asymmetrical distribution features within this transition region, which is investigated by employing a three-dimensional Hall magnetohydrodynamic (MHD) model from an energy transfer perspective in this study. Simulation results reveal that solar
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A Slowdown in Translation Speed of Western North Pacific Tropical Cyclones Undergoing Rapid Intensification Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-19 Jinjie Song, Philip J. Klotzbach, Yifei Dai, Yihong Duan
This study examines long-term trends in western North Pacific (WNP) tropical cyclones (TCs) experiencing rapid intensification (RI) from 1971 to 2022. Although there is only a weak slowdown for all intensifying WNP TCs, the average translation speed for RI TCs has significantly decelerated over the RI main development region (7.5°–25°N, 115°–160°E). This slowdown is primarily due to increasing RI probabilities
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A Composite Seismic Source Model for the First Major Event During the 2022 Hunga (Tonga) Volcanic Eruption Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-17 Jinyin Hu, Thanh-Son Phạm, Hrvoje Tkalčić
The violent eruption of the Hunga (Tonga) submarine volcano on 15 January 2022 caused a 58 km-heigh ash plume, catastrophic tsunami, and significant global seismic and infrasound waves. However, the physical mechanism underpinning its multiple-explosive events remains unclear, and its resolvability relies on the seismic waveform source inversion. The studies of two different point-source models, the
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Investigating Hydrated Silica in Syrtis Major, Mars: Implications for the Longevity of Water–Rock Interaction Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-18 J. R. C. Voigt, V. Z. Sun, C. E. Viviano, K. M. Stack
We use the crystallinity of hydrated silica, represented by the 1.4 μm absorption position in orbiter spectroscopic data, as a proxy for the longevity of water–rock interaction in the Syrtis Major region. Geological maps and crater size–frequency distribution analyses are employed to contextualize mineral detections and estimate surface ages. Hydrated silica is detected within two distinct geological
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Impact of Paleogeography on the Stratospheric Polar Vortex in the Geological Past Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-19 Pengkun Yang, Yan Xia, Yongyun Hu, Ming Bao, Xuejuan Ren, Chen Zhou, Yimin Zhu
The stratospheric polar vortex (SPV) significantly influences current weather and climate patterns. However, its state in the geological past remains largely unexplored. This study investigates SPV variations in the past 250 million years, using a fully coupled Earth System Model. It is found that midlatitude paleogeography primarily drove substantial SPV variations in the deep time, while changes
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Kinetic Theory of Drift-Mirror Mode Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-19 Yao Yao, Haotian Chen, Zilong Li, Jiquan Li
We present a nonlocal gyrokinetic theory for the drift-mirror mode in high-β$\beta $ anisotropic plasmas. Here, β$\beta $ represents the ratio of plasma pressure to magnetic pressure. The equilibrium distribution is established self-consistently via guiding-center Hamiltonian theory. To keep the nonuniformity and finite Larmor radius (FLR) effects on an equal footing, we derive the three-field nonlocal
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Reconstructing the Zama (Mexico) discovery source to sink story, Part I; detrital zircon U–Pb and (U‐Th)/He provenance analysis and implications for sediment source terranes Basin Res. (IF 2.8) Pub Date : 2024-09-19 D. F. Stockli, J. W. Snedden, T. F. Lawton, M. Albertson, J. Pasley
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Deriving Flow Velocity and Initial Concentration From Liesegang-Like Patterns J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-18 Chong Liu, Victor M. Calo, Klaus Regenauer-Lieb, Manman Hu
Zebra rocks, characterized by their striking reddish-brown stripes, rods, and spots of hematite (Fe-oxide), showcase complex self-organized patterns formed under far-from-equilibrium conditions. Despite their ease of recognition, the underlying mechanisms of pattern-forming processes remain elusive. We introduce a novel advection-dominated phase-field model that effectively replicates the Liesegang-like
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Mechanical Energy Dissipation During Seismic Dynamic Weakening in Calcite-Bearing Faults J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-18 Stefano Aretusini, Arantzazu Nuñez Cascajero, Chiara Cornelio, Xabier Barrero Echevarria, Elena Spagnuolo, Alberto Tapetado, Carmen Vazquez, Giulio Di Toro, Massimo Cocco
Earthquakes are frictional instabilities caused by the shear stress decrease, that is, dynamic weakening, of faults with slip and slip rate. During dynamic weakening, shear stress depends on slip, slip rate, and temperature, according to constitutive laws governing the earthquake rupture process. In the laboratory, technical limitations in measuring temperature during frictional instabilities inhibit
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How Induced Earthquakes Respond to Pre-Existing Fractures and Hydraulic Fracturing Operations? A Case Study in South China J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-16 Dewei Li, Miao Zhang, Jing Zheng, Ruizhao Yang, Suping Peng
Hydraulic fracturing in shale gas production can induce felt earthquakes, making it crucial to understand and mitigate induced earthquakes. The Cen'gong shale gas block in South China offers extensive data—3D seismic, geological structure, microseismic data, and detailed stimulation operations—allowing a comprehensive investigation into induced earthquakes by hydraulic fracturing. Using a dense temporary
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Imaging Attenuation From Array Analysis of Surface Waves J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-18 Xueyang Bao, Nian Wang
Anelastic attenuation provides key insight in our understanding of thermal and rheological structures and the associated deformation and dynamic mechanisms of the Earth's deep interior. Unfortunately, attenuation tomography is advanced far behind wave-speed tomography due to the challenge in properly excluding the complex effects of elastic heterogeneities on seismic wave amplitude. By taking advantage
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Residual and Unmodeled Ocean Tide Signal From 20+ Years of GRACE and GRACE-FO Global Gravity Field Models J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-16 Igor Koch, Mathias Duwe, Jakob Flury
We analyze remaining ocean tide signal in K/Ka-band range-rate (RR) postfit residuals, obtained after estimation of monthly gravity field solutions from 21.5 years of Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On sensor data. Low-pass filtered and numerically differentiated residuals are assigned to 5°×5°$\mathrm{5}{}^{\circ}\times \mathrm{5}{}^{\circ}$ grids and a spectral analysis
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The LCROSS Impact Crater as Seen by ShadowCam and Mini-RF: Size, Context, and Excavation of Copernican Volatiles Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-17 C. I. Fassett, M. S. Robinson, G. W. Patterson, B. W. Denevi, P. Mahanti, E. Mazarico, E. G. Rivera-Valentín, F. S. Turner, M. R. Manheim, A. Colaprete
The Lunar CRater Observations and Sensing Satellite (LCROSS) impacted a Centaur rocket stage into a permanently shadowed region (PSR) in Cabeus crater, excavating water ice and other volatiles. We used the Miniature Radio Frequency (Mini-RF) instrument on the Lunar Reconnaissance Orbiter and the ShadowCam instrument on the Korean Pathfinder Lunar Orbiter to detect the probable 22-m diameter crater
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Looking for Subsurface Oceans Within the Moons of Uranus Using Librations and Gravity Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-15 D. J. Hemingway, F. Nimmo
Several of the icy moons in the Jupiter and Saturn systems appear to possess internal liquid water oceans. Our knowledge of the Uranian moons is more limited but a future tour of the system has the potential to detect subsurface oceans. Planning for this requires an understanding of how the moons' internal structures—with and without oceans—relate to observable quantities. Here, we show that the amplitude
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Humid, Warm and Treed Ecosystems Show Longer Time-Lag of Vegetation Response to Climate Geophys. Res. Lett. (IF 4.6) Pub Date : 2024-09-17 Xinran Gao, Wen Zhuo, Alemu Gonsamo
Climate-vegetation interaction assessments often focus on vegetation response to concurrent climatic perturbations, seldom on the time-lag effect of climate. Here we employ global satellite observations, climate data records and CO2 flux measurements to calculate the time-lag of vegetation response to climate. We analyze the time-lags of various climate variables under distinct environmental conditions
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Tracing the Oxidizing State and Element-Mobilizing Fluids in Continental Subduction Zones: Insights From the Granitic Melt-Eclogite Interface J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-16 Jing Lei, Ye Tian, Yilin Xiao, Dong-Bo Tan, Li-Juan Xu, Qinxia Wang, Wangye Li
Fluids in subduction zones significantly influence element mobility, isotope fractionation, and mass transfer. However, unraveling the source, composition, and redox state of fluids in continental subduction zones poses a significant challenge. This study focuses on a granitic melt-eclogite contact interface, along with adjacent granite and eclogite from the Sulu ultrahigh-pressure metamorphic belt
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The Sierra Madre Oriental Orocline: Paleomagnetism of the Nazas Province in NE Mexico J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-09-16 Rafael Guerra Roel, Daniel Pastor Galán, Gabriel Chávez-Cabello, César Francisco Ramírez-Peña, José Jorge Aranda Gómez, Gerardo Patiño Méndez, R. Giovanny Nova, Alejandro Rodríguez-Parra, Roberto Stanley Molina Garza
Curved mountain belts are spectacular natural features that contain crucial 3D information about the tectonic evolution of orogenic systems in the absence of other kinematic markers. The Mesozoic units exposed in the Mexican Fold and Thrust Belt in northeastern Mexico show a striking curvature, whose kinematic history has not been studied. The existing tectonic models of the region simply assumed the