Geophysical Research Letters最新文献

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Distinct Characteristics of Heavy Metal and Water-Soluble Ion Composition in Hailstone: Insights Into Atmospheric Sources and Microphysical Processes 海泡石中重金属和水溶性离子成分的不同特征:大气来源和微物理过程的启示
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-03-03 DOI: 10.1029/2024GL113988
Yuqian Zhou, Xiaofei Li, Keke Ma, Huayu Huang, Qinghong Zhang
{"title":"Distinct Characteristics of Heavy Metal and Water-Soluble Ion Composition in Hailstone: Insights Into Atmospheric Sources and Microphysical Processes","authors":"Yuqian Zhou,&nbsp;Xiaofei Li,&nbsp;Keke Ma,&nbsp;Huayu Huang,&nbsp;Qinghong Zhang","doi":"10.1029/2024GL113988","DOIUrl":"https://doi.org/10.1029/2024GL113988","url":null,"abstract":"<p>The investigation of chemical composition in hailstones offers valuable insights into cloud physics. Unique characteristics of heavy metals and water-soluble ions have been detected to provide a comprehensive perspective on their presence and behavior within hailstones. 34 hailstone samples were collected from 12 cities in China between 2016 and 2021. Regional differences in heavy metal concentrations between northern and southern China are influenced by anthropogenic pollution sources. Water-soluble ions are dominated by distant marine aerosol sources. The most notable distinction is that heavy metals display negligible correlation with PM<sub>10</sub>, whereas water-soluble ions exhibit a statistically significant relationship. This suggests that chemical components contribute to hailstone formation through diverse pathways. Water-soluble ions with hygroscopicity primarily act as cloud condensation nuclei (CCN) to promote the formation of cloud droplets. Heavy metals are barely noticeable when attached to aerosol particles due to random collisions with various hydrometeors.</p>","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/10.1029/2024GL113988","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143530217","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
Characteristics of Tropical Cyclone Outer Size and Structure Associated With Extratropical Transition
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-03-03 DOI: 10.1029/2024GL111703
Dzuy Nguyen, Benjamin A. Schenkel
{"title":"Characteristics of Tropical Cyclone Outer Size and Structure Associated With Extratropical Transition","authors":"Dzuy Nguyen,&nbsp;Benjamin A. Schenkel","doi":"10.1029/2024GL111703","DOIUrl":"https://doi.org/10.1029/2024GL111703","url":null,"abstract":"<p>There is a lack of consensus on how tropical cyclone outer winds may change, if at all, due to extratropical transition. Hence, this study examines changes in North Atlantic tropical cyclone outer size and structure using a large, multidecadal sample of cases from reanalysis data. These results suggest that tropical cyclone outer size and structure typically remain unchanged until after extratropical transition end. In those minority of cases with strong expansion during extratropical transition, increases in tropical cyclone outer winds begin first in the lower troposphere during extratropical transition and build upwards over time. This broadening of the azimuthal-mean outer winds is also associated with an increasingly asymmetric outer wind field with the strongest winds concentrated downstream of the tropical cyclone. These storms that expand most strongly during transition are typically smaller at transition start and eventually become embedded in more strongly baroclinic environments by extratropical transition end.</p>","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/10.1029/2024GL111703","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533502","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
Low Tropospheric Ozone Over the Indo-Pacific Warm Pool Related to Non-Electrified Convection
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-03-03 DOI: 10.1029/2024GL112788
Clara M. Nussbaumer, Andrea Pozzer, Michael Hewson, Linda Ort, Bianca Krumm, Joseph Byron, Jonathan Williams, Philipp Joppe, Florian Obersteiner, Andreas Zahn, Jos Lelieveld, Horst Fischer
{"title":"Low Tropospheric Ozone Over the Indo-Pacific Warm Pool Related to Non-Electrified Convection","authors":"Clara M. Nussbaumer,&nbsp;Andrea Pozzer,&nbsp;Michael Hewson,&nbsp;Linda Ort,&nbsp;Bianca Krumm,&nbsp;Joseph Byron,&nbsp;Jonathan Williams,&nbsp;Philipp Joppe,&nbsp;Florian Obersteiner,&nbsp;Andreas Zahn,&nbsp;Jos Lelieveld,&nbsp;Horst Fischer","doi":"10.1029/2024GL112788","DOIUrl":"https://doi.org/10.1029/2024GL112788","url":null,"abstract":"<p>Lightning is the most important source of nitric oxide (NO) in the tropical upper troposphere and controls the formation of tropospheric ozone (<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>O</mi>\u0000 <mn>3</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation> ${mathrm{O}}_{3}$</annotation>\u0000 </semantics></math>). It is associated with deep convection and occurs mostly over continents. The Chemistry of the Atmosphere Field Experiment in the Pacific (CAFE Pacific) was conducted in early 2024 from Cairns, Australia, taking airborne measurements across the Australian continent and the surrounding maritime regions. Based on cloud top properties, lightning data and in situ observations of NO, <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>O</mi>\u0000 <mn>3</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation> ${mathrm{O}}_{3}$</annotation>\u0000 </semantics></math> and carbon monoxide, we show that deep convection occurs over Northern Australia and the Indo-Pacific Warm Pool. While we identify strong lightning activity over Australia, we observe deep convection in the Warm Pool that is not electrified. Our observations of low <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>O</mi>\u0000 <mn>3</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation> ${mathrm{O}}_{3}$</annotation>\u0000 </semantics></math> in the Warm Pool can be attributed to <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>O</mi>\u0000 <mn>3</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation> ${mathrm{O}}_{3}$</annotation>\u0000 </semantics></math>-poor air from the marine boundary layer, which is not replenished by photochemical production from NO at high altitudes.</p>","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/10.1029/2024GL112788","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143530492","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
Hysteresis of the Antarctic Ice Sheet With a Coupled Climate-Ice-Sheet Model
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-03-03 DOI: 10.1029/2024GL111492
G. Leloup, A. Quiquet, D. M. Roche, C. Dumas, D. Paillard
{"title":"Hysteresis of the Antarctic Ice Sheet With a Coupled Climate-Ice-Sheet Model","authors":"G. Leloup,&nbsp;A. Quiquet,&nbsp;D. M. Roche,&nbsp;C. Dumas,&nbsp;D. Paillard","doi":"10.1029/2024GL111492","DOIUrl":"https://doi.org/10.1029/2024GL111492","url":null,"abstract":"&lt;p&gt;The stability of the Antarctic ice sheet under different fixed &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mtext&gt;CO&lt;/mtext&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${text{CO}}_{2}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; levels and orbital configurations is explored using a coupled climate-ice sheet model, starting from either a pre-industrial ice sheet or an ice-free, isostatically rebounded geometry. Simulations reveal a strong hysteresis effect: equilibrium ice volumes differ significantly for equivalent &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mtext&gt;CO&lt;/mtext&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${text{CO}}_{2}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; levels, depending on the initial ice sheet geometry. Crucially, the albedo-melt feedback is accounted for in our coupled setting, resulting in a nonlinear response of the ice sheet to the &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mtext&gt;CO&lt;/mtext&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${text{CO}}_{2}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; forcing. Critical &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mtext&gt;CO&lt;/mtext&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${text{CO}}_{2}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; thresholds trigger either the complete Antarctic ice sheet loss or near-complete regrowth. The orbital configuration influences these &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mtext&gt;CO&lt;/mtext&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${text{CO}}_{2}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; thresholds. These findings highlight the importance of ice sheet-atmosphere interactions, notably the albedo-melt feedback, in projecting future long-term ice sheet behavior. Neglecting these feedbacks could lead to an overestimation of &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mtext&gt;CO&lt;/mtext&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${text{CO}}_{2}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; thresholds for ice sheet destabilization, with implications for future long-term sea level rise u","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/10.1029/2024GL111492","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533384","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
Monitoring Water From Space: An Illustration in Death Valley, California
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-03-03 DOI: 10.1029/2024GL110250
B. Buzzanga, B. D. Hamlington, D. P. S. Bekaert, T. Pavelsky, A. Handwerger, M. Bonnema, C. Lee
{"title":"Monitoring Water From Space: An Illustration in Death Valley, California","authors":"B. Buzzanga,&nbsp;B. D. Hamlington,&nbsp;D. P. S. Bekaert,&nbsp;T. Pavelsky,&nbsp;A. Handwerger,&nbsp;M. Bonnema,&nbsp;C. Lee","doi":"10.1029/2024GL110250","DOIUrl":"https://doi.org/10.1029/2024GL110250","url":null,"abstract":"<p>Climate change and human activity are dramatically reshaping how water is distributed on Earth. High quality observations and products that bridge the gap between low-level data and actionable information are needed to support the understanding of current and future water availability. Two new developments are addressing these needs. The SWOT satellite is measuring water elevation with unprecedented detail, while the OPERA project is turning satellite observations into clear, interpretable maps of surface water extent. Together, these represent a major advance in our ability to measure and monitor water from space. We demonstrate their capability by tracking the transformation of Badwater Basin, Death Valley–one of the driest, hottest places on Earth–into an ephemeral lake following extreme precipitation events starting with Hurricane Hilary in August 2023. As a challenging area to understand water dynamics, Badwater Basin serves as a model for how these new observations enable more effective water management.</p>","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/10.1029/2024GL110250","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535879","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
Arctic Warming Suppressed by Remnant Glacial Ice Sheets in Past Interglacials
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-03-03 DOI: 10.1029/2024GL111798
Lynn A. Hirose, Ayako Abe-Ouchi, Wing-Le Chan, Ryouta O'ishi, Masakazu Yoshimori, Takashi Obase
{"title":"Arctic Warming Suppressed by Remnant Glacial Ice Sheets in Past Interglacials","authors":"Lynn A. Hirose,&nbsp;Ayako Abe-Ouchi,&nbsp;Wing-Le Chan,&nbsp;Ryouta O'ishi,&nbsp;Masakazu Yoshimori,&nbsp;Takashi Obase","doi":"10.1029/2024GL111798","DOIUrl":"https://doi.org/10.1029/2024GL111798","url":null,"abstract":"<p>Time slice experiments for past interglacial climates of Marine Isotope Stage (MIS)1, MIS5e, and MIS11 are simulated using an atmosphere-ocean-vegetation coupled general circulation model with prescribed remnant ice sheet distributions. We examine Arctic climate responses to insolation intensity as well as remnant ice sheets through atmosphere-ocean-vegetation feedback quantitatively. During periods when Northern Hemisphere ice sheets remain, Arctic sea ice maintains a large extent in summer, and annual mean surface air temperatures are low enough to outweigh the warming expected from summer insolation intensity and greenhouse gases alone. This indicates that glacial ice sheets, due to their high albedo and their role as a heat sink, suppress the accumulation of heat in the Arctic Ocean in summer and the associated warming feedback. The results suggest a need to consider the history of remnant ice sheets and the duration of ice-free periods to explain different Arctic climate responses within and between interglacials.</p>","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/10.1029/2024GL111798","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535880","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
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
{"title":"Sea Surface Temperature in the East Central Pacific Ocean as a New Potential Predictor of Post-Monsoon Cyclonic Activity Over the Arabian Sea","authors":"Neeru Jaiswal,&nbsp;Randhir Singh","doi":"10.1029/2024GL109725","DOIUrl":"https://doi.org/10.1029/2024GL109725","url":null,"abstract":"<p>The study investigates Power Dissipation Index (PDI) of tropical cyclones (TCs) over the North Indian Ocean (NIO) and their relationship with sea surface temperature (SST) over the global ocean from 1982 to 2021. PDI of TCs over the Arabian Sea (AS) has a significant positive correlation with SST over the East Central Pacific Ocean (ECPO). This relationship appears to develop in March and peaks during the monsoon and post-monsoon seasons. Conversely, PDI of TCs over the Bay of Bengal has a significant negative association with SST over the Niño region. Regression analysis and numerical simulations reveal that heating over ECPO produces anomalous walker circulation, leading to favorable conditions for TC genesis and intensification over AS. This study has implication for forecasting TC activity and understanding how SST variability affects TCs over NIO in a changing climate.</p>","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/10.1029/2024GL109725","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143530216","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
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
{"title":"Ray Tracing of Whistler Mode Waves in Jupiter's Magnetosphere","authors":"Ning Kang,&nbsp;Qianli Ma,&nbsp;Jacob Bortnik,&nbsp;Murong Qin,&nbsp;Wen Li","doi":"10.1029/2024GL113727","DOIUrl":"https://doi.org/10.1029/2024GL113727","url":null,"abstract":"<p>Previous statistical studies have described the distributions and properties of whistler-mode waves in Jupiter's magnetosphere, but explaining these wave distributions requires modeling wave propagation from their generation near the magnetic equator. In this letter, we conduct ray tracing of whistler-mode waves based on realistic Jovian magnetic field and density models. The ray tracing results generally agree with the statistical wave distributions based on Juno measurements. The modeled ray paths show that high-frequency waves generated near the equator are confined within 20° magnetic latitude due to Landau damping, low-frequency waves can propagate to higher latitudes and lower <i>M</i>-shells, with changing wave normal angles, and a portion of low-frequency waves could propagate to high <i>M</i> shells at high latitudes. Our modeling results provide a theoretical interpretation of whistler-mode wave distributions and properties, providing essential insights for future radiation belt models at Jupiter.</p>","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/10.1029/2024GL113727","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533500","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
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,&nbsp;H. T. Smith,&nbsp;R. E. Johnson,&nbsp;V. Dols,&nbsp;F. Bagenal,&nbsp;J. E. P. Connerney,&nbsp;S. J. Bolton,&nbsp;G. Clark,&nbsp;D. K. Haggerty,&nbsp;P. Kollmann,&nbsp;C. P. Paranicas","doi":"10.1029/2024GL112668","DOIUrl":"https://doi.org/10.1029/2024GL112668","url":null,"abstract":"<p>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 &gt;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 (<i>R</i><sub>Io</sub>), above the predominantly SO<sub>2</sub> core atmosphere but imbedded within the extended atmosphere and corona of SO<sub>2</sub>, 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.</p>","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,&nbsp;Yongfei Wang","doi":"10.1029/2024GL112043","DOIUrl":"https://doi.org/10.1029/2024GL112043","url":null,"abstract":"<p>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.</p>","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
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