Geophysical Research Letters最新文献_第10页

Sea Surface Temperature in the East Central Pacific Ocean as a New Potential Predictor of Post-Monsoon Cyclonic Activity Over the Arabian Sea

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-03-03 DOI: 10.1029/2024GL109725

Neeru Jaiswal, Randhir Singh

引用次数: 0

Ray Tracing of Whistler Mode Waves in Jupiter's Magnetosphere

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-03-03 DOI: 10.1029/2024GL113727

Ning Kang, Qianli Ma, Jacob Bortnik, Murong Qin, Wen Li

引用次数: 0

Diagnosing the Atmosphere of Jupiter's Volcanic Moon Io Using Energetic Neutral Atoms (ENAs)

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-03-03 DOI: 10.1029/2024GL112668

B. H. Mauk, H. T. Smith, R. E. Johnson, V. Dols, F. Bagenal, J. E. P. Connerney, S. J. Bolton, G. Clark, D. K. Haggerty, P. Kollmann, C. P. Paranicas

{"title":"Diagnosing the Atmosphere of Jupiter's Volcanic Moon Io Using Energetic Neutral Atoms (ENAs)","authors":"B. H. Mauk, H. T. Smith, R. E. Johnson, V. Dols, F. Bagenal, J. E. P. Connerney, S. J. Bolton, G. Clark, D. K. Haggerty, P. Kollmann, C. P. Paranicas","doi":"10.1029/2024GL112668","DOIUrl":"https://doi.org/10.1029/2024GL112668","url":null,"abstract":"During a Juno spacecraft encounter with Jupiter's volcanic moon Io (30 December 2023), the Jupiter Energetic Particle Detector Instrument (JEDI) observed Energetic Neutral Atoms (ENAs) of >150 keV oxygen and sulfur (O + S) coming from Io's mostly nightside atmosphere. JEDI lines-of-sight approached closest to Io between 1.31 and 1.49 Io radii (RIo), above the predominantly SO2 core atmosphere but imbedded within the extended atmosphere and corona of SO2, SO, O, and S. The ratio of O + S ENA intensities and O + S ion intensities estimated to be interacting with Io's atmosphere along JEDI lines-of-sight are 4%–7%. Those estimates are below expectations (∼11%–∼14%), but presently within uncertainties, based on integrations along the JEDI lines-of-sight through a prevailing but uncertain, local-time-symmetric model of Io's extended atmosphere. Expected ENA production rates will remain uncertain until detailed modeling of ion/atmosphere interactions are performed, and knowledge of charge exchange cross sections is verified.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 5","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL112668","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533385","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

Revealing Spatial Variations of Earthquake Stress Drop and Peak Ground Acceleration Using a Non-Ergodic Modeling Framework

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-03-03 DOI: 10.1029/2024GL112043

Shiying Nie, Yongfei Wang

{"title":"Revealing Spatial Variations of Earthquake Stress Drop and Peak Ground Acceleration Using a Non-Ergodic Modeling Framework","authors":"Shiying Nie, Yongfei Wang","doi":"10.1029/2024GL112043","DOIUrl":"https://doi.org/10.1029/2024GL112043","url":null,"abstract":"Improving accuracy and reducing uncertainty in ground motion models (GMMs) are crucial for the safe design of infrastructure. Traditional GMMs often oversimplify source complexity, such as stress drop, due to high variability in estimation. This study aims to address this issue by extracting robust spatial variations in stress drop estimates and ground motion residuals. We introduce a non-ergodic modeling framework using Bayesian Gaussian Process regression to analyze data from over 5,000 earthquakes (M2-4.5) in the San Francisco Bay area. Our findings reveal consistent spatial patterns in non-ergodic stress drop and peak ground acceleration (PGA), providing a reliable approach to understanding the spatial distribution of stress drop and its link to regional tectonics. Furthermore, integrating source models derived from the non-ergodic stress drop into GMMs can effectively account for source effect in ground motions and reduce aleatory uncertainty. This study establishes a framework for utilizing stress drop data sets to enhance seismic hazard assessment.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 5","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL112043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533499","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

Snow Mass Recharge of the Greenland Ice Sheet Fueled by Intense Atmospheric River

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-03-03 DOI: 10.1029/2024GL110121

Hannah Bailey, Alun Hubbard

引用次数: 0

Identifying a Pattern of Predictable Decadal North Pacific SST Variability in Historical Observations

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-03-02 DOI: 10.1029/2024GL112729

Emily M. Gordon, Noah S. Diffenbaugh

引用次数: 0

Natural Soils-Based Oxidation Mitigates Methane Leakage From Integrity Compromised Legacy Wells

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-02-28 DOI: 10.1029/2024GL113522

Aaron G. Cahill, James McClure, Iain de Jonge-Anderson

{"title":"Natural Soils-Based Oxidation Mitigates Methane Leakage From Integrity Compromised Legacy Wells","authors":"Aaron G. Cahill, James McClure, Iain de Jonge-Anderson","doi":"10.1029/2024GL113522","DOIUrl":"https://doi.org/10.1029/2024GL113522","url":null,"abstract":"An increasing number of legacy petroleum wells are reported to suffer integrity failure, releasing methane (CH4) into the subsurface and atmosphere. Subsurface released methane is reactively transported toward ground surface with a portion converted to carbon dioxide by soil microbes. Currently, the extent to which fugitive CH4 oxidation occurs, including microbial taxa responsible and controlling parameters are poorly understood. Here, we examined fugitive CH4 leakage at a legacy well in the Montney region of British Columbia, Canada and find up to 90% is oxidized at rates as high as 230 g of CH4/m2 of soils/day during summer. Meanwhile, a profound difference in microbiome between soils at the wellhead and background was observed, while modeling suggests that prevailing seasonal temperature will moderate CH4 oxidation extent. Overall, we find that filtration of fugitive CH4 through natural soils can significantly reduce emissions of CH4 and mitigate climate impacts from such sources.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 5","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL113522","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521763","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

Is There a Scalar Atmospheric Surface Layer Within a Convective Boundary Layer? Implications for Flux Measurements

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-02-28 DOI: 10.1029/2024GL112619

Heping Liu, Cheng Liu, Yanzhao Zhou, Qianyu Zhang, Ankur R. Desai, Khaled Ghannam, Jianping Huang, Gabriel G. Katul

{"title":"Is There a Scalar Atmospheric Surface Layer Within a Convective Boundary Layer? Implications for Flux Measurements","authors":"Heping Liu, Cheng Liu, Yanzhao Zhou, Qianyu Zhang, Ankur R. Desai, Khaled Ghannam, Jianping Huang, Gabriel G. Katul","doi":"10.1029/2024GL112619","DOIUrl":"https://doi.org/10.1029/2024GL112619","url":null,"abstract":"Top-down entrainment shapes the vertical gradients of sensible heat, latent heat, and CO2 fluxes, influencing the interpretation of eddy covariance (EC) measurements in the unstable atmospheric surface layer (ASL). Using large eddy simulations for convective boundary layer flows, we demonstrate that decreased temperature gradients across the entrainment zone increase entrainment fluxes by enhancing the entrainment velocity, amplifying the asymmetry between top-down and bottom-up flux contributions. These changes alter scalar flux profiles, causing flux divergence or convergence and leading to the breakdown of the constant flux layer assumption (CFLA) in the ASL. As a result, EC-measured fluxes either underestimate or overestimate “true” surface fluxes during divergence or convergence phases, contributing to energy balance non-closure. The varying degrees of the CFLA breakdown are a fundamental cause for the non-closure issue. These findings highlight the underappreciated role of entrainment in interpreting EC fluxes, addressing non-closure, and understanding site-to-site variability in flux measurements.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 5","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL112619","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513542","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

Investigation of Space Weather Effects by Swarm Magnetic Field Data: The SFAC Index

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-02-28 DOI: 10.1029/2024GL112430

Octav Marghitu, Adrian Blăgău, Vlad Constantinescu, Malcolm W. Dunlop, Guram Kervalishvili, Jan Rauberg, Jesper W. Gjerloev

{"title":"Investigation of Space Weather Effects by Swarm Magnetic Field Data: The SFAC Index","authors":"Octav Marghitu, Adrian Blăgău, Vlad Constantinescu, Malcolm W. Dunlop, Guram Kervalishvili, Jan Rauberg, Jesper W. Gjerloev","doi":"10.1029/2024GL112430","DOIUrl":"https://doi.org/10.1029/2024GL112430","url":null,"abstract":"The three Swarm satellites provide an optimum, low Earth orbit (LEO) and multi-spacecraft platform, to explore for the first time the local correlation between field-aligned currents (FACs), auroral electrojets, and magnetic perturbations at the Earth's surface. By combining Swarm and ground magnetic field data, one can investigate systematically the full correlation chain, whose final link controls the ground induced currents and related space weather effects. We introduce an integrated FAC product, the Sheet FAC (SFAC) index, as a convenient measure of the in-situ FAC data, and explore the correlations SFAC-AE, SFAC-PEJ and SFAC-dH, with AE the standard auroral electrojet index, PEJ the local, Swarm based, polar electrojet index, and dH the horizontal magnetic field perturbation at the Earth's surface. Given the good SFAC-dH correlation, we also suggest an extension of SFAC to higher LEO satellites, which cannot observe any more the electrojet currents, but are fully capable to monitor SFAC.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 5","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL112430","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513865","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

Direct Evidence of the Lower Atmosphere Perturbations Producing Abnormal Ionospheric Longitudinal Gradients During Quiescent Geomagnetic Conditions

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-02-28 DOI: 10.1029/2024GL113648

Yuyan Jin, Biqiang Zhao, Xu Zhou, Honglian Hao, Guozhu Li, Xinan Yue, Zishen Li

{"title":"Direct Evidence of the Lower Atmosphere Perturbations Producing Abnormal Ionospheric Longitudinal Gradients During Quiescent Geomagnetic Conditions","authors":"Yuyan Jin, Biqiang Zhao, Xu Zhou, Honglian Hao, Guozhu Li, Xinan Yue, Zishen Li","doi":"10.1029/2024GL113648","DOIUrl":"https://doi.org/10.1029/2024GL113648","url":null,"abstract":"An unusual case of a large ionospheric longitudinal gradient in East Asia on 11 May 2021 occurred during a geomagnetically-quiet period. It shows the largest east-west difference in electron density at Yamagawa and Wuhan stations when Kp < 2 for 13:00–17:00 LT in 2021. Ground- and satellite-based observations consistently confirm that there was a decrease in the west and an increase in the east of ∼125°E, with hemispherical symmetric with respect to the geomagnetic equator. The potential mechanism is further investigated through multi-observations of plasma drifts and neutral winds, provided by the Ionospheric Connections Explorer satellite and newly-established Sanya Incoherent Scatter Radar. The prominent longitudinal gradient in plasma drifts, electro-dynamically coupled with E-region winds, is suggested as the contributor for the east-west differences, together with the strong gradient of F-region winds in phase. This study provides direct evidence linking atmosphere perturbations to unusual longitudinal structure of terrestrial space plasma environment.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 5","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL113648","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513866","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