-
Machine Learning-Based Framework for Failure Forecast and Shear Strength Estimation of Non-Conforming RC Shear Walls J. Earthq. Eng. (IF 2.6) Pub Date : 2024-04-19 Mehmet Tan, Gulsen Taskinkaya, Zeynep Tuna Deger
Earthquake reconnaissance after the recent Kahramanmaras, Turkey, earthquake sequence in February 6, 2023 has shown that the majority of the reinforced concrete (RC) structural elements do not comp...
-
Assessment of Atmospheric and Surface Energy Budgets Using Observation-Based Data Products Surv. Geophys. (IF 4.6) Pub Date : 2024-04-17 Michael Mayer, Seiji Kato, Michael Bosilovich, Peter Bechtold, Johannes Mayer, Marc Schröder, Ali Behrangi, Martin Wild, Shinya Kobayashi, Zhujun Li, Tristan L’Ecuyer
-
Low-rank Representation for Seismic Reflectivity and its Applications in Least-squares Imaging Surv. Geophys. (IF 4.6) Pub Date : 2024-04-17 Jidong Yang, Jianping Huang, Hao Zhang, Jiaxing Sun, Hejun Zhu, George McMechan
-
A Computationally Efficient Algorithm for Constructing Effective Vector-Valued Seismic Intensity Measures for Engineering Structures J. Earthq. Eng. (IF 2.6) Pub Date : 2024-04-17 Xiaoyue Wang, Zhe Qu
Seismic intensity measures (IMs) quantify the severity of ground motions and their impacts on structures. They play a vital role in many aspects of earthquake engineering. This paper proposes a nov...
-
Static Stability Behavior-Based Seismic Damage Endurance Assessment of Long-Span Single-Layer Spherical Lattice Shells J. Earthq. Eng. (IF 2.6) Pub Date : 2024-04-17 Tingting Liu, Yantai Zhang
This paper presents a modified evaluation approach for the structural-capacity-reserve (SCR) based on the static stability behavior of single-layer spherical lattice shells to achieve more accurate...
-
Frequency-Drifting Plasmaspheric Hiss: A Statistical Study From the Van Allen Probes Data Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-16 Siyang Yi, Nigang Liu, Yi Xie, Zhaoguo He, Jiang Yu, Jun Cui
Plasmaspheric hiss, a whistler-mode emission confined in the high-density plasmasphere, is of great interest to the space community attributed to its important role in inner magnetospheric dynamics. Their frequency-time structures provide crucial evidence for understanding the wave origin. In this work, based on ∼7-year Van Allen Probes data, we statistically studied the frequency-drifting plasmaspheric
-
Seismological Evidence for the Existence of Long-Distance Hydrological Channel and Its Implication for Fluid Overpressure in Southern Sichuan, China Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-16 Wen Tian, Qingju Wu, Kun Dai, Rumeng Guo, Zhixiang Yao, Zhengyang Qiang, Fei Deng
Unprecedented levels of seismicity have been seen in southern Sichuan, China, since the large-scale exploitation of shale gas. Fluid and pore pressure transported through hydrological channel are thought as pivotal elements in the induction of earthquakes. Our high-resolution tomography results reveal two inclined seismic anomalies featured by low Vs and high Vp/Vs at different depth range. The deeper
-
Improving Mercury Systematics With Molybdenum and Vanadium Enrichments: New Insights From the Cambrian-Ordovician Boundary Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-16 Leibo Bian, Anthony Chappaz, Xiaomei Wang, David Amouroux, Niels Hemmingsen Schovsbo, Xiaowei Zheng, Hamed Sanei
The Cambro-Ordovician interval marks a significant transition from extinction to bio-diversification in deep time. However, the relationship of bio-transition to volcanism, commonly characterized by mercury (Hg) systematics in sedimentary records, has not been examined. We present the first Cambro-Ordovician Hg systematics from the Scandinavian Alum Shale. Our results show pronounced Furongian Hg enrichments
-
Geologic Provinces Beneath the Greenland Ice Sheet Constrained by Geophysical Data Synthesis Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-16 Joseph A. MacGregor, William T. Colgan, Guy J. G. Paxman, Kirsty J. Tinto, Beáta Csathó, Fiona A. Darbyshire, Mark A. Fahnestock, Thomas F. Kokfelt, Emma J. MacKie, Mathieu Morlighem, Olga V. Sergienko
Present understanding of Greenland's subglacial geology is derived mostly from interpolation of geologic mapping of its ice-free margins and unconstrained by geophysical data. Here we refine the extent of its geologic provinces by synthesizing geophysical constraints on subglacial geology from seismic, gravity, magnetic and topographic data. North of 72°N, no province clearly extends across the whole
-
Sedimentology, geochronology and provenance of the late Permian and Triassic Mitu Group in Peru—The evolution of continental facies along a transform margin Basin Res. (IF 3.2) Pub Date : 2024-04-16 Fernando Panca, Heinrich Bahlburg, José Cárdenas, Jasper Berndt, Nils Keno Lünsdorf, Axel Gerdes
-
Thermal and Physical Properties of Barrovian Metamorphic Sequence Rocks in the Ailao Shan-Red River Shear Zone, and Implications for Crustal Channel Flow J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-14 Lei Ji, Fulai Liu, Richard Palin, Fang Wang, Zaibo Sun
The collisional history between Greater India and the Eurasian plate has been well constrained by the study of exhumed Barrovian metamorphic sequence (BMS) rocks in the Himalayan Range. However, in the southeastern Tibetan Plateau, the collisional records have been obscured by intense, regional-scale strike-slip overprinting and recrystallization. Here, in BMS rocks from the Ailao Shan–Red River shear
-
Disagreements in Geodetically Inferred Strain Rates in the Western US With Stress Orientations and Geologic Moment Rates J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-15 Kaj M. Johnson
I employ an elasticity-based method to invert a geodetically derived surface velocity field in the western US using for present-day surface strain rate fields with uncertainties. The method uses distributed body forces in a thin elastic sheet and allows for discontinuities in velocity across creeping faults using the solution for dislocations in a thin elastic plate. I compare the strain rate fields
-
Salient Changes of Earth's Magnetic Field Toward the End of Cretaceous Normal Superchron (CNS) J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-15 Xinyu Liu, Yong-Xiang Li, Carl Richter
Changes in Earth's magnetic field during the Cretaceous Normal Superchron (CNS) spanning ∼121 Ma to ∼84 Ma hold important clues about the geodynamo evolution. Canonical models predict a persistently strong geomagnetic field with low variability during CNS, which, however, has not been observed in the available absolute paleointensity data and seafloor marine magnetic anomaly (MMA) records. The lack
-
The Influence of Climate Variability and Future Climate Change on Atlantic Hurricane Season Length Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-14 Christina M. Patricola, Grace E. Hansen, Ana C. T. Sena
Atlantic hurricane season length is important for emergency management preparation, motivating the need to understand its variability and change. We investigated the influence of ocean variability on Atlantic hurricane season length in observations and a future climate simulated by the Energy Exascale Earth System Model (E3SM). We found that multiple factors influence hurricane season length, through
-
On the Importance of the Kelvin-Helmholtz Instability on Magnetospheric and Solar Wind Dynamics During High Magnetic Shear Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-14 Katariina Nykyri
The secondary processes driven by the velocity shear driven Kelvin-Helmholtz Instability (KHI) in the magnetized plasmas have been shown to be important in producing plasma transport and heating from the shocked solar wind into the Earth's magnetosphere (MSP). The plasma transport into the MSP due to KHI has been shown to be strongest during northward interplanetary magnetic field (IMF) via KHI driven
-
Observational Verification of High-Order Solar Tidal Harmonics in the Earth's Atmosphere Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-14 Maosheng He, Jeffrey M. Forbes, Christoph Jacobi, Guozhu Li, Libo Liu, Gunter Stober, Chi Wang
This study combines 8 years of middle atmospheric wind data observed at 52°N latitude from two radars in different longitudinal sectors to investigate solar tides. The power spectral density of horizontal winds exhibits a −3 power law within the frequency range 2.0 < f < 7.0 cpd (equivalent to periods 3.6 − 12.0 hr). Particularly noteworthy are the 4.8- and 4-hr tides, exhibiting signal-to-noise ratios
-
Strong Green-Up of Tropical Asia During the 2015/16 El Niño Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-14 T. W. Satriawan, X. Luo, J. Tian, K. Ichii, L. Juneng, M. Kondo
El Niño/Southern Oscillation (ENSO) is the main climate mode that drives the interannual variability in climate and consequently vegetation greenness. While widespread green-up has been reported and examined in tropical America during El Niño, it remains unclear how vegetation in tropical Asia changes during the period. Here, we used four remote sensing-based leaf area index (LAI) products to investigate
-
Strong Oceanic Forcing on Decadal Surface Temperature Variability Over Global Ocean Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-14 Peng Gu, Zhengyu Liu, Thomas L. Delworth
Sea surface temperature (SST) variability on decadal timescales has been associated with global and regional climate variability and impacts. The mechanisms that drive decadal SST variability, however, remain highly uncertain. Many previous studies have examined the role of atmospheric variability in driving decadal SST variations. Here we assess the strength of oceanic forcing in driving decadal SST
-
The Architecture of a Root Zone of a Large Magmatic Conduit System From High Resolution Magnetic, Gravity and Petrophysical Data: The Reinfjord Ultramafic Complex J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-13 Z. Pastore, N. S. Church, C. Fichler, A. Michels, G. W. ter Maat, R. B. Larsen, S. A. McEnroe
The Seiland Igneous Province (SIP) is a large province of mafic and ultramafic (UM) complexes interpreted to be relics of a giant plumbing system feeding the Ediacaran Central Iapetus Magmatic Province. The Reinfjord Ultramafic Complex (RUC) is one of the four major ultramafic complexes of the SIP. The RUC has a younger dunite core surrounded by wehrlite and lherzolite embedded in country rocks consisting
-
Path and Slip Dependent Behavior of Shallow Subduction Shear Zones During Fluid Overpressure J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-13 Benjamin D. Belzer, Melodie E. French
Elevated pore fluid pressure is proposed to contribute to slow earthquakes along shallow subduction plate boundaries. However, the processes that create high fluid pressure, disequilibrium compaction and dehydration reactions, lead to different effective stress paths in fault rocks. These paths are predicted by granular mechanics frameworks to lead to different strengths and deformation modes, yet
-
Distinct PM2.5-Related Near-Term Climate Penalties Induced by Different Clean Air Measures in China Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-13 Da Gao, Bin Zhao, Shuxiao Wang, Jiewen Shen, Yuan Wang, Chen Zhou, Jingkun Jiang, Qingru Wu, Shengyue Li, Yisheng Sun, Yicong He, Yun Zhu, Zhe Jiang
The reductions in aerosols often exacerbate climate warming. It remains unclear how to effectively alleviate PM2.5 pollution while minimizing the penalty on climate warming. Here we identify the clean air measures in China that are associated with low aerosol climate penalty efficiency (ACPE), which is defined as aerosol radiative forcing per unit PM2.5 concentration reduction. The measures in transportation
-
Origins of Biweekly Sea Surface Temperature Variability in the Eastern Equatorial Pacific and Atlantic Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-13 Gaopeng Xu, Ping Chang, Qiuying Zhang
Biweekly sea surface temperature (SST) variability significantly contributes to over 50% of the intraseasonal variability in the eastern equatorial Pacific (EEP) and Atlantic (EEA). Our study investigates this biweekly variability, employing a blend of in–situ and reanalysis data sets. The research identifies biweekly signals in SST, meridional wind, and ocean currents, notably in September–November
-
Uranium Isotope Constraints on the Pre-Deposition Time of Asian Dust to the North Pacific Ocean: Implications for Provenance and Iron Supply Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-13 Le Li, Gen K. Li, Run Zhang, Wenfang Zhang, David William Hedding, Jun Chen, Gaojun Li
Asian dust delivers highly reactive iron (FeHR) to the Pacific Ocean, affecting marine biogeochemical cycles and Earth's climate. Tracing the source of dust deposited in the Pacific is vital for assessing global nutrient cycles but poses challenges. This work applies the (234U/238U) activity ratio to determine the pre-deposition time and provenance of dust in North Pacific Ocean sediments (Ocean Drilling
-
Atmospheric Rivers in the Eastern and Midwestern United States Associated With Baroclinic Waves Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-13 Travis A. O’Brien, Burlen Loring, Amanda Sabatini Dufek, Mohammad Rubaiat Islam, Diya Kamnani, Kwesi Twentwewa Quagraine, Cody Kirkpatrick
Atmospheric rivers (ARs) significantly impact the hydrological cycle and associated extremes in western continental regions. Recent studies suggest ARs also influence water resources and extremes in continental interiors. AR detection tools indicate that AR conditions are relatively frequent in areas east of the Rocky Mountains. The origin of these ARs, whether from synoptic-scale waves or mesoscale
-
Improved Consistency of Satellite XCO2 Retrievals Based on Machine Learning Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-13 Xiaoting Huang, Zhu Deng, Fei Jiang, Minqiang Zhou, Xiaojuan Lin, Zhu Liu, Muyan Peng
Quantifying atmospheric CO2 over long periods from space is crucial in understanding the carbon cycle's response to climate change. However, a single satellite offers limited spatiotemporal coverage, making comprehensive monitoring challenging. Moreover, biases among various satellite retrievals hinder their direct integration. This study proposed a machine learning framework for fusing the column-averaged
-
In-Plane Seismic Behavior of Adobe Walls Reinforced with Palm Fibers J. Earthq. Eng. (IF 2.6) Pub Date : 2024-04-11 Hosein Mohammadi, Abolfazl Eslami, Hosein Mirabi Banadaki, Reza Morshed
This study investigates the effects of palm fibers on the seismic behavior of adobe walls. Towards this, six wall panels, with dimensions of 1000 × 900 × 200 mm3 were constructed with different fib...
-
Non-Double-Couple Components of Seismic Source: Method and Application to the 2014–2015 Bárðarbunga Volcanic Event Sequence, Iceland J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-11 Yanyan Xu, Lianxing Wen
Genuine non-double-couple (non-DC) components of a seismic source, defined here as the non-DC components that are not due to summation of pure double-couple (DC) components, provide important insight into special physical processes in non-earthquake sources such as explosion, volcano eruption and collapse etc. Yet they remain challenging to be resolved. To address the issue and explore the physical
-
Rock Anisotropy Promotes Hydraulic Fracture Containment at Depth J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-11 Guanyi Lu, Seyyedmaalek Momeni, Carlo Peruzzo, Fatima-Ezzahra Moukhtari, Brice Lecampion
We report laboratory experiments and numerical simulations demonstrating that the anisotropic characteristics of rocks play a major role in the elongation of hydraulic fractures (HFs) propagating in a plane perpendicular to the rocks' inherent layering (the bedding planes in sedimentary rocks and foliation planes in metamorphic rocks). Transverse anisotropy leads to larger HF extension in the para
-
Seismic Fragility Reduction for Base Isolated RC Frame Buildings by Curved Surface Sliding Bearings with Over-Stroke Displacement Capacity J. Earthq. Eng. (IF 2.6) Pub Date : 2024-04-11 Antonio Di Cesare, Nicla Lamarucciola, Felice Carlo Ponzo
Recently, experimental studies on failure conditions of buildings equipped with curved surface sliding isolators have shown that when no displacement restraining elements are employed and the conca...
-
Analysis of Offshore Wind Turbine by Considering Soil-Pile-Structure Interaction: Effect of Sea-Wave Load Duration J. Earthq. Eng. (IF 2.6) Pub Date : 2024-04-11 Maryam Massah-Fard, Ayfer Erken, Bülent Erkmen, Atilla Ansal
Offshore Wind Turbines (OWTs) confront different types of environmental loads during their lifetime. One of the most significant loads is the cyclic sea-wave load which affects the OWT system durin...
-
Dynamic Soil Pressure Acting on Building Basement According to Embedment Depth J. Earthq. Eng. (IF 2.6) Pub Date : 2024-04-11 Jin-Young Park, Hong-Gun Park, Dong-Kwan Kim
In the present study, centrifuge tests for small-scale specimens were performed to investigate the dynamic soil pressure of the basement of buildings subjected to seismic ground motions. To investi...
-
Glacier Retreat in Eastern Himalaya Drives Catastrophic Glacier Hazard Chain Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-10 Yao Li, Yifei Cui, Xie Hu, Zhong Lu, Jian Guo, Yu Wang, Hao Wang, Shuofan Wang, Xinzhi Zhou
Cryospheric responses to climate warming include glacier retreat, altitude-dependent thermal instability, and abundant meltwater, which increase the frequency of catastrophic glacier hazard chain (CGHC) events. Here we investigated the formation mechanism of a special CGHC event in 2018, in the Sedongpu Glacier, Eastern Himalayas, China. Based on the multi-source remote sensing, seismic signal analysis
-
Observation and Reanalysis Derived Relationships Between Cloud and Land Surface Fluxes Across Cumulus and Stratiform Coupling Over the Southern Great Plains Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-10 Tianning Su, Zhanqing Li, Yunyan Zhang, Youtong Zheng, Haipeng Zhang
Understanding interactions between low clouds and land surface fluxes is critical to comprehending Earth's energy balance, yet their relationships remain elusive, with discrepancies between observations and modeling. Leveraging long-term field observations over the Southern Great Plains, this investigation revealed that cloud-land interactions are closely connected to cloud-land coupling regimes. Observational
-
First Observation of Electron Rolling-Pin Distribution in Jupiter's Magnetosphere Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-10 C. Q. Wang, H. S. Fu, J. B. Cao, Z. Wang, Z. Z. Guo, W. D. Fu, Z. H. Yao, Y. Wei, B. Z. Zhang
The electron rolling-pin distribution, showing electron pitch angles primarily at 0°, 90°, and 180°, has been widely studied in the Earth's magnetosphere, but has never been reported in other planetary environments. Here, by utilizing the Jupiter Near-polar Orbiter (Juno) measurements, we report for the first time the electron rolling-pin distribution in Jupiter's magnetosphere. We reveal the energy
-
Model Biases in the Atmosphere-Ocean Partitioning of Poleward Heat Transport Are Persistent Across Three CMIP Generations Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-10 A. Donohoe, R. Fajber, T. Cox, K. C. Armour, D. S. Battisti, G. H. Roe
The observed partitioning of poleward heat transport between atmospheric and oceanic heat transports (AHT and OHT) is compared to that in coupled climate models. Model ensemble mean poleward OHT is biased low in both hemispheres, with the largest biases in the Southern Hemisphere extratropics. Poleward AHT is biased high in the Northern Hemisphere, especially in the vicinity of the peak AHT near 40°N
-
Assessment of the Madden-Julian Oscillation in CMIP6 Models Based on Moisture Mode Theory Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-10 Qiao-Jun Lin, Víctor C. Mayta, Ángel F. Adames Corraliza
The moist processes of the Madden-Julian Oscillation (MJO) in the Coupled Model Intercomparison Project Phase 6 models are assessed using moisture mode theory-based diagnostics over the Indian Ocean (10°S–10°N, 75°E–100°E). Results show that no model can capture all the moisture mode properties relative to the reanalysis. Most models satisfy weak temperature gradient balance but have unrealistically
-
Radiation, Air Temperature, and Soil Water Availability Drive Tree Water Deficit Across Temporal Scales in Canada's Western Boreal Forest Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-10 Nia Perron, Jennifer L. Baltzer, Matteo Detto, Magali Nehemy, Christopher Spence, Gabriel Hould-Gosselin, Haley Alcock, Bram Hadiwijaya, Colin P. Laroque, Oliver Sonnentag
Changes are projected for the boreal biome with complex and variable effects on forest vegetation including drought-induced tree mortality and forest loss. With soil and atmospheric conditions governing drought intensity, specific drivers of trees water stress can be difficult to disentangle across temporal scales. We used wavelet analysis and causality detection to identify potential environmental
-
Continental Crust Rejuvenation Across the Paleo-Mesoarchean Transition Resulted From Elevated Mantle Geotherms Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-10 Gui-Mei Lu, Yi-Gang Xu, Wei Wang, Christopher J. Spencer, Guangyu Huang, Nick M. W. Roberts
The increase in initial Hf isotopes identified in early Mesoarchean detrital zircon is commonly interpreted as a reflection of the geodynamic transition from stagnant-lid to mobile-lid tectonics. However, given the lack of petrogenetic context, interpreting detrital zircon may lead to spurious conclusions. In this contribution, we use zircon U-Pb-Hf-O isotopic and bulk rock compositions of newly identified
-
Large-Scale Tropical Circulation Intensification by Aerosol Effects on Clouds Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-09 Guy Dagan
This study addresses a critical gap in understanding anthropogenic influences on tropical climate dynamics by investigating the impact of aerosol-cloud interactions on large-scale circulation. Despite extensive research on greenhouse gas-induced warming and its effects on tropical circulation, the impact of aerosols, particularly their interactions with clouds, on large-scale circulation remains understudied
-
Channel Development and Electric Parameter Characteristics of Regular Pulse Bursts in Lightning Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-09 X. Fan, Y. Zhang, P. Krehbiel, D. Zheng, W. Yao, Y. Zhang, L. Xu, H. Liu, W. Lyu
Observations of a regular pulse burst (RPB) at the end of a K-event are analyzed utilizing a simple geometric model and particle swarm optimization (PSO) to estimate the currents and propagation speeds of successive pulses of the RPB. The results show that the current of successive pulses is strongly overlapped and, for typical speeds of continuously propagating K-events, are unphysically large (88 kA)
-
Issue Information Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-10
No abstract is available for this article.
-
CO2 Flushing Triggers Paroxysmal Eruptions at Open Conduit Basaltic Volcanoes J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-08 Luca Caricchi, Chiara P. Montagna, Alessandro Aiuppa, Joao Lages, Giancarlo Tamburello, Paolo Papale
Open conduit volcanoes erupt with the highest frequency on Earth. Their activity is characterized by an outgassing flux that largely exceeds the gas that could be released by the erupted magma; and by frequent small explosions intercalated by larger events that pose a significant risk to locals, tourists, and scientists. Thus, identifying the signs of an impending larger explosion is of utmost importance
-
High-Resolution Paleomagnetic Secular Variation Since ∼13 ka From a Loess Section in Northwest China and a Regional Geomagnetic Directional Model for East Asia J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-08 Yunchang Fan, Shuhui Cai, Francisco Javier Pavón-Carrasco, Jianguo Xiong, Chenglong Deng, Yongxin Pan
Paleomagnetic secular variation (PSV) records provide important information for the dynamic processes of the Earth's geomagnetic field, and also can be used for regional stratigraphic correlation. We conducted a paleomagnetic study on a high sedimentation rate Holocene loess section (the Minle section) with precise 14C age constraints in Northwest China. Rock magnetic results indicate that single domain
-
Dynamical Modeling of Fault Slip Rates at the New Zealand Plate Boundary Indicates Fault Weakness J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-08 H. Hirschberg, R. Sutherland
We construct a thin-sheet dynamical model of the New Zealand plate boundary that includes faults. Our model fits fault slip rates, style of distributed deformation, and is constrained by relative plate boundary motion. We assume a pseudo-plastic rheology and achieve a best fit to slip rate observations with a deviatoric stress magnitude of 20 MPa. Modeled local forces are significant at Puysegur and
-
Temporal Seismic Velocity Changes Associated With the Mw 6.1, May 2008 Ölfus Doublet, South Iceland: A Joint Interpretation From dv/v and GPS J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-08 Yeşim Çubuk-Sabuncu, Kristín Jónsdóttir, Thóra Árnadóttir, Aurélien Mordret, Corentin Caudron, Thomas Lecocq, Raphael De Plaen
In South Iceland, populated and agricultural areas are at risk of earthquakes due to their location within the South Iceland Seismic Zone (SISZ). In 2008, two moderate-sized earthquakes (M5.8 and M5.9) occurred in Ölfus, the western end of this highly active transform zone. We analyze temporal seismic velocity variations (dv/v) related to the Ölfus earthquake doublet, using cross-correlations of ambient
-
Effect of Seismicity and Tectonic-Glacial Interactions on Submarine Megaslides Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-08 Sean P. S. Gulick, Robert S. Reece, Derek E. Sawyer, Gail L. Christeson, Brian K. Horton
Enhanced sedimentation at glacial margins can produce submarine megaslides (>10,000 km3). We report a single megaslide in the Surveyor Fan, Gulf of Alaska. Minimum extant size is ∼16,124 km2 in area and ∼9,080 km3 in volume. Slope failure occurred ∼1.2 Ma at the onset of the mid-Pleistocene transition (MPT). With accretion along the Aleutian-Alaska Trench, the original volume is conservatively ∼16
-
Long-Term Trends in the Distribution of Ocean Chlorophyll Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-08 Dongran Zhai, Claudie Beaulieu, Raphael M. Kudela
The concentration of chlorophyll-a (CHL) is an important proxy for autotrophic biomass and primary production in the ocean. Quantifying trends and variability in CHL are essential to understanding how marine ecosystems are affected by climate change. Previous analyses have focused on assessing trends in CHL mean, but little is known about observed changes in CHL extremes and variance. Here we apply
-
Low Viscosity of Peridotite Liquid: Implications for Magma Ocean Dynamics Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-08 D. Huang, Y. Li, M. Murakami
Transport properties of silicate melts control magma ocean dynamics on the early terrestrial planets and rocky exoplanets. Here we calculate the viscosity (transport of momentum) of peridotite liquid at potential magma ocean conditions (0–159 GPa, 2,200–6,000 K) using ab initio molecular dynamics simulations. We find that, unlike MgSiO3 or basaltic melts, the viscosity of the highly depolymerized peridotite
-
The Location of Large-Scale Soil Moisture Anomalies Affects Moisture Transport and Precipitation Over Southeastern South America Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-08 Chu-Chun Chen, Francina Dominguez
Southeastern South America (SESA) is a highly productive agricultural region and a hot spot for land-atmosphere interactions. To evaluate the impact of dry soil moisture anomalies (SMAs) on SESA climate and the sensitivity of the regional climate response to the location of SMAs, we perform three experimental simulations using the Community Earth System Model (CESM) with prescribed dry SMAs over (a)
-
Marine Phosphate Level During the Archean Constrained by the Global Redox Budget Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-08 Yasuto Watanabe, Kazumi Ozaki, Eiichi Tajika
Understanding the oceanic phosphate concentration is critical for understanding marine productivity and oxygen evolution throughout Earth history. During the Archean, estimates of marine phosphate levels range from scarce to enriched conditions. However, biogeochemical conditions required for sustaining high phosphate concentrations while retaining an anoxic atmosphere during the Archean remain ambiguous
-
Subsurface Warming of the West Antarctic Continental Shelf Linked to El Niño-Southern Oscillation Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-08 Maurice F. Huguenin, Ryan M. Holmes, Paul Spence, Matthew H. England
Recent observations suggest that El Niño–Southern Oscillation (ENSO) impacts basal melting of West Antarctic ice shelves, yet sparse ocean observations limit our understanding of the associated processes. Here we investigate how ENSO events modulate subsurface West Antarctic shelf temperatures using high-resolution global ocean-sea ice model simulations. During El Niño, the subsurface shelf warming
-
Unscented Kalman Filter-Based Two-Stage Adaptive Compensation Method for Real-Time Hybrid Simulation J. Earthq. Eng. (IF 2.6) Pub Date : 2024-04-08 Tao Wang, Yuefeng Gong, Guoshan Xu, Zhen Wang
In order to effectively solve the dynamic delay problem of the servo-hydraulic actuator, simplify the design of the compensator, and improve the robustness of the compensation, an unscented Kalman ...
-
Integrated Investigation on Heterogeneous Lower Crust Rheology in Kyushu and Afterslip Behavior Following the 2016 Mw7.1 Kumamoto Earthquake Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-06 Yiqing Liu, Xin Cui, Yan Hu, Jian Zhang, Yunguo Chen
The viscoelastic lower crust beneath Kyushu Island, influenced by the volcanic arc, interplays with active crustal faults in this region and helps to shape local tectonics. In this study, we employed a three-dimensional viscoelastic finite element model to gain insights into the lithospheric rheology and crustal faulting kinematics, through modeling the postseismic deformation processes of the 2016
-
Source Parameters of Laboratory Acoustic Emission Events Estimated From the Coda of Waveforms J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-06 Tatiana I. Kartseva, Nikolai M. Shapiro, Andrey V. Patonin, Natalia M. Shikhova, Vladimir B. Smirnov, Alexander V. Ponomarev
We develop a method to estimate relative seismic moments M0 and corner frequencies fc of acoustic emission events recorded in laboratory experiments from amplitude spectra of signal's coda composed of reverberated and scattered waves. This approach has several advantages with respect to estimations from direct waves that are often clipped and also are difficult to separate in experiments performed
-
Mapping Global Lithospheric Mantle Pressure-Temperature Conditions by Machine-Learning Thermobarometry Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-06 Ben Qin, Chenyang Ye, Jingao Liu, Shichun Huang, Shunguo Wang, J. ZhangZhou
Comprehending the temperature distribution within Earth's lithospheric mantle is of paramount importance for understanding the dynamics of Earth's interior. Traditional mineral-based thermobarometers effectively constrain temperature and pressure for particular compositions, but their application is limited at the global scale. Here, we trained machine-learning (ML) algorithms on 985 published high-temperature
-
Asymmetric Influences of ENSO Phases on the Predictability of North Pacific Sea Surface Temperature Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-06 Zhaolu Hou, Jianping Li, Yina Diao, Yazhou Zhang, Quanjia Zhong, Jie Feng, Xin Qi
The North Pacific sea surface temperature (SST) has a profound climatic influence. The El Niño-Southern Oscillation (ENSO) significantly impacts the North Pacific SST; however, the influence of the distinct phases of ENSO on SST predictability remains unclear. To overcome the model limitations, this study assessed SST predictability under diverse ENSO phases using reanalysis. The predictability limit
-
Banding in the Margins of Basaltic Dykes Indicates Pulsatory Propagation During Emplacement J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-04 C. Allgood, E. W. Llewellin, M. C. S. Humphreys, S. A. Mathias, R. J. Brown, C. Vye-Brown
Basaltic fissure eruptions, which are the most common type of eruption on Earth, are fed by dykes which mediate magma transport through the crust. Dyke propagation processes are important because they determine the geometry of the transport pathway and the nature of any geophysical signals associated with magma ascent. Here, we investigate small-scale (mm–cm wide) banding features at the margins of
-
Gas Seepage and Pockmark Formation From Subsurface Reservoirs: Insights From Table-Top Experiments J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-04 I. Vaknin, E. Aharonov, R. Holtzman, O. Katz
Pockmarks are morphological depressions commonly observed in ocean and lake floors. Pockmarks form by fluid (typically gas) seepage thorough a sealing sedimentary layer, deforming and breaching the layer. The seepage-induced sediment deformation mechanisms, and their links to the resulting pockmarks morphology, are not well understood. To bridge this gap, we conduct laboratory experiments in which
-
Detailed 3D Structures of the Western Edge of the Pacific Large Low Velocity Province J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-04 Jiewen Li, Baolong Zhang, Daoyuan Sun, Dongdong Tian, Jiayuan Yao
Large Low Velocity Provinces (LLVPs) are situated oppositely in the lowermost mantle beneath the Pacific Ocean and Africa. Deciphering the detailed seismic structures at the edge of LLVPs can provide key information on the composition and dynamics in the deep Earth. Here, we provide a detailed seismic image at the western edge of the Pacific LLVP by dense recordings. Differential travel time residuals
-
Radiative Effect of Two Contrail Cirrus Outbreaks Over Western Europe Estimated Using Geostationary Satellite Observations and Radiative Transfer Calculations Geophys. Res. Lett. (IF 5.2) Pub Date : 2024-04-05 Xinyue Wang, Kevin Wolf, Olivier Boucher, Nicolas Bellouin
Estimation of the perturbation to the Earth's energy budget by contrail outbreaks is required for estimating the climate impact of aviation and verifying the climate benefits of proposed contrail avoidance strategies such as aircraft rerouting. Here we identified two successive large-scale contrail outbreaks developing in clear-sky conditions in geostationary and polar-orbiting satellite infrared images