Geophysical Research Letters最新文献_第9页

Detachment-Fault Structure Beneath the TAG Hydrothermal Field, Mid-Atlantic Ridge, Revealed From Dense Wide-Angle Seismic Data

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-02-09 DOI: 10.1029/2024GL111464

Szu-Ying Lai, G. Bayrakci, B. J. Murton, T. A. Minshull

{"title":"Detachment-Fault Structure Beneath the TAG Hydrothermal Field, Mid-Atlantic Ridge, Revealed From Dense Wide-Angle Seismic Data","authors":"Szu-Ying Lai, G. Bayrakci, B. J. Murton, T. A. Minshull","doi":"10.1029/2024GL111464","DOIUrl":"10.1029/2024GL111464","url":null,"abstract":"The Trans-Atlantic Geotraverse (TAG) field on the Mid-Atlantic Ridge is one of the largest currently active seafloor hydrothermal fields known. An underlying detachment is inferred to maintain TAG's long-lived hydrothermal discharge, but the detachment lacks a widespread corrugated surface. We used dense wide-angle seismic data to define TAG's detachment structure at a finer scale than has previously been possible. We generated two P-wave velocity profiles of the shallow section of the detachment using first-arrival travel-time tomography, preconditioned by downward continuation. Our results reveal a low-angle detachment, dipping at ∼15° (±5°) at 5 km east of the ridge axis, and evidence for uplifted lower-crustal gabbro in the footwall. Increasing footwall velocities southward suggest a more intense exhumation of deep-seated rocks, showing the detachment's geometry changes along the ridge axis. We conclude the detachment is a complex 3-D structure, and a young system without a dome-shaped footwall can exhumes deep-seated crustal rocks.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL111464","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143375209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

AMOC Variability in Climate Models and Its Dependence on the Mean State

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-02-09 DOI: 10.1029/2024GL110356

Brady S. Ferster, Alexey V. Fedorov, Juliette Mignot, Eric Guilyardi

{"title":"AMOC Variability in Climate Models and Its Dependence on the Mean State","authors":"Brady S. Ferster, Alexey V. Fedorov, Juliette Mignot, Eric Guilyardi","doi":"10.1029/2024GL110356","DOIUrl":"10.1029/2024GL110356","url":null,"abstract":"Understanding internal variability of the climate system is critical when isolating internal and anthropogenically forced signals. Here, we investigate the modes of Atlantic Meridional Overturning Circulation (AMOC) variability using perturbation experiments with the Institut Pierre-Simon Laplace's (IPSL) coupled model and compare them to Coupled Model Intercomparison Project Phase 6 (CMIP6) pre-industrial control simulations. We identify two characteristic modes of variability—decadal-to-multidecadal (DMDvar) and centennial (CENvar). The former is driven largely by temperature anomalies in the subpolar North Atlantic, while the latter is driven by salinity in the western subpolar North Atlantic. The amplitude of each mode scales linearly with the mean AMOC strength in the IPSL experiments. The DMDvar amplitude correlates well with the AMOC mean strength across CMIP6 models, while the CENvar mode does not. These findings suggest that the strength of DMDvar depends robustly on the North Atlantic mean state, while the CENvar mode may be model-dependent.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL110356","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143375206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Assessment of the Soundscape West of the Svalbard Islands

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-02-09 DOI: 10.1029/2024GL112951

Giacomo Giorli, Giuliana Pennucci, Gaultier Real

引用次数: 0

Cold Ion Energization by Secondary Magnetic Reconnection in a Turbulent Reconnection Jet During Storm Period

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-02-09 DOI: 10.1029/2024GL112230

M. Zhou, Z. H. Zhong, L. J. Song, X. J. Ou, R. X. Tang, X. H. Deng, Y. Pang

{"title":"Cold Ion Energization by Secondary Magnetic Reconnection in a Turbulent Reconnection Jet During Storm Period","authors":"M. Zhou, Z. H. Zhong, L. J. Song, X. J. Ou, R. X. Tang, X. H. Deng, Y. Pang","doi":"10.1029/2024GL112230","DOIUrl":"10.1029/2024GL112230","url":null,"abstract":"During geomagnetic storms, cold ions from the ionosphere substantially contribute to the plasma sheet population, which may significantly impact magnetotail energy conversion and transport. However, the energization of cold ions in the magnetotail during storm periods remains poorly understood. This paper investigates cold ion energization by secondary reconnection in a magnetotail reconnection outflow during a storm period. This secondary reconnection was triggered by the interaction between a large-scale flux pileup region and a magnetic flux rope. Cold protons originating from the ionosphere were injected into the diffusion region from the lobe region. These cold protons gained energy mainly through the normal electric field in the flux pileup region before entering the cold ion diffusion region, where their bulk kinetic energy was mainly converted into thermal kinetic energy. These results will significantly advance our understanding of the energization and transport of cold ions in the magnetotail.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL112230","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143375208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Scaling of MCS, Non-MCS, and Total Extreme Precipitation With Temperature Over the Central United States

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-02-08 DOI: 10.1029/2024GL111104

Huancui Hu, L. Ruby Leung, Xiaoming Sun, Guiling Wang

引用次数: 0

Lithospheric Thinning of the Northeastern Arabian Margin Revealed by Matrix-Free Teleseismic Traveltime Tomography

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-02-07 DOI: 10.1029/2024GL112604

Gaoshan Guo, Haiqiang Lan, Ling Chen, Lingkai Meng, José Badal

{"title":"Lithospheric Thinning of the Northeastern Arabian Margin Revealed by Matrix-Free Teleseismic Traveltime Tomography","authors":"Gaoshan Guo, Haiqiang Lan, Ling Chen, Lingkai Meng, José Badal","doi":"10.1029/2024GL112604","DOIUrl":"10.1029/2024GL112604","url":null,"abstract":"The obduction of the Tethys oceanic lithosphere is documented by the Semail ophiolite along the northeastern Arabian continental margin. Although the ophiolite is continuous and of similar age across the region, the eastern and western segments display distinct geological contrasts. To investigate the deep structural mechanisms underlying these surface variations, we applied teleseismic traveltime tomography using an advanced eikonal solver and a matrix-free adjoint-state approach on data from a dense seismic array. Our 3D upper mantle P-wave model reveals a significant velocity contrast, with positive anomalies in the west and negative anomalies in the east, separated by a prominent fault zone. We propose that the continental lithosphere beneath northeastern Arabia underwent thinning during the Permian breakup of Pangaea. This pre-obduction lithospheric segmentation likely influenced the subduction dynamics associated with the ophiolite obduction process. Additionally, early Cenozoic thermal activity may have further amplified lithospheric thinning, contributing to the observed structural variations.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL112604","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evidence of Magma Reservoirs Beneath Volcanoes in Northern Sulawesi and the Molucca Sea From Regional Earthquake Tomography

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-02-07 DOI: 10.1029/2024GL110794

Pepen Supendi, Nicholas Rawlinson, Jifei Han, Sri Widiyantoro, Simone Pilia, Andri Dian Nugraha, Dwikorita Karnawati

引用次数: 0

Giant Undulations Driven by Pitch-Angle Scattering of Time Domain Structures Modulated by Plasmapause Surface Wave

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-02-07 DOI: 10.1029/2024GL111782

Yi-Jia Zhou, Pei-Heng Du, Jian Liu, Quan-Qi Shi, Meng-Dan Guo, Fei He, Xiao-Xin Zhang, Yong-Liang Zhang, Zhong-Hua Yao, Jun Zhong, Zhaojin Rong, Yong Wei

{"title":"Giant Undulations Driven by Pitch-Angle Scattering of Time Domain Structures Modulated by Plasmapause Surface Wave","authors":"Yi-Jia Zhou, Pei-Heng Du, Jian Liu, Quan-Qi Shi, Meng-Dan Guo, Fei He, Xiao-Xin Zhang, Yong-Liang Zhang, Zhong-Hua Yao, Jun Zhong, Zhaojin Rong, Yong Wei","doi":"10.1029/2024GL111782","DOIUrl":"10.1029/2024GL111782","url":null,"abstract":"Plasmapause surface waves (PSWs) near the plasmapause boundary are regarded to be the magnetospheric source of ionospheric auroral giant undulations (GUs) located at the equatorward boundary of diffuse aurora. However, the observational evidence of wave-particle interaction connecting PSWs and GUs is absent. In this letter, we demonstrate GUs are driven by pitch-angle scattering of time domain structures modulated by the PSWs, based on the conjugated ionospheric and magnetospheric observations. Specifically, ionospheric GUs are lighted by the pitch-angle scattering of <1 keV thermal electron and ions and energetic ions with energy up to dozens of keV near the plasmapause. Further, the total fluxes during one PSW period and energy of scattered electron and ions determine the size and luminosity of GUs. Our research provides observational evidence that PSWs cause periodic electron precipitation via modulating the time domain structures rather than the previously predicted chorus or electron cyclotron harmonic waves.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL111782","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Toward Artificial General Intelligence in Hydrogeological Modeling With an Integrated Latent Diffusion Framework

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-02-06 DOI: 10.1029/2024GL114298

Chuanjun Zhan, Zhenxue Dai, Jiu Jimmy Jiao, Mohamad Reza Soltanian, Huichao Yin, Kenneth C. Carroll

{"title":"Toward Artificial General Intelligence in Hydrogeological Modeling With an Integrated Latent Diffusion Framework","authors":"Chuanjun Zhan, Zhenxue Dai, Jiu Jimmy Jiao, Mohamad Reza Soltanian, Huichao Yin, Kenneth C. Carroll","doi":"10.1029/2024GL114298","DOIUrl":"10.1029/2024GL114298","url":null,"abstract":"Deep learning models have been extensively applied to various aspects of hydrogeological modeling. However, traditional approaches often rely on separate task-specific models, resulting in time-consuming selection and tuning processes. This study develops an integrated Latent Diffusion Model (LDM) framework to address four key hydrogeological modeling tasks: aquifer heterogeneity structure generation, surrogate modeling for flow and transport, and direct inversion of aquifer heterogeneity structure. Using a consistent architecture and hyperparameters, the LDM demonstrates robust multi-task processing capabilities, accurately capturing aquifer heterogeneity, enabling rapid predictions of hydraulic head and solute transport, and efficiently performing direct inversion without iterative simulations. By integrating multiple tasks within a single framework, LDM eliminates the need for task-specific models or extensive parameter optimization, offering an efficient and adaptive general solution for deep learning-based hydrogeological modeling. Its generalization across diverse objectives underscores its potential as a cornerstone for advancing Artificial General Intelligence in hydrogeological modeling.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL114298","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143192417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corotation-Bounce Resonance of Ions in Jupiter's Magnetosphere

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-02-06 DOI: 10.1029/2024GL113193

Y. Sarkango, J. R. Szalay, P. A. Damiano, A. H. Sulaiman, P. A. Delamere, J. Saur, D. J. McComas, R. W. Ebert, F. Allegrini

引用次数: 0