Geophysical Research Letters最新文献_第2页

Analysis of the Correlation Between Post‐Injection Wellhead Pressure Decay and Trailing Seismicity 注后井口压力衰减与尾震活动性的相关性分析

IF 5.2 1区地球科学

Geophysical Research Letters Pub Date : 2026-10-16 DOI: 10.1029/2026gl125281

R. Minetto,Z. Wang,O. Lengliné,J. Schmittbuhl

引用次数: 0

Rectified Effect of Synoptic‐Scale Atmospheric Eddies on Global Ocean‐Atmosphere Heat Exchanges 天气尺度大气涡旋对全球海洋-大气热交换的校正效应

IF 5.2 1区地球科学

Geophysical Research Letters Pub Date : 2026-10-15 DOI: 10.1029/2026gl123091

Satoru Okajima,Shoichiro Kido,Hiroyuki Tomita,Meghan F. Cronin

{"title":"Rectified Effect of Synoptic‐Scale Atmospheric Eddies on Global Ocean‐Atmosphere Heat Exchanges","authors":"Satoru Okajima,Shoichiro Kido,Hiroyuki Tomita,Meghan F. Cronin","doi":"10.1029/2026gl123091","DOIUrl":"https://doi.org/10.1029/2026gl123091","url":null,"abstract":"Abstract Midlatitude oceans are characterized by vigorous turbulent heat flux (THF) from the ocean to the atmosphere. While the influence of sub‐weekly, synoptic‐scale atmospheric eddies on short‐term THF variability is well‐documented, their long‐term, “rectified” effect on air‐sea interactions remains poorly understood. Here we present a global assessment of these synoptic‐scale eddies' effects on climatological‐mean and interannual variability of THF. We demonstrate that synoptic‐scale atmospheric fluctuations enhance annual‐mean climatological upward THF almost globally, primarily by increasing wind speed. This enhancement is maximized around midlatitude oceanic frontal zones, reaching ∼30% of the climatology. In addition, atmospheric eddies amplify interannual THF variability in mid‐ and high‐latitudes although suppressing the variability in low‐latitudes. Our findings underscore the importance of synoptic‐scale atmospheric eddies for long‐term air‐sea interactions, especially in midlatitudes, and the need to appropriately represent storm‐tracks in climate models to obtain realistic mean states.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"1 1","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149209647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coral Reef‐Level Upwelling in an Internal Wave Hotspot Modulated by Mesoscale Dynamics 由中尺度动力学调制的内波热点中的珊瑚礁水平上升流

IF 5.2 1区地球科学

Geophysical Research Letters Pub Date : 2026-10-15 DOI: 10.1029/2025gl121018

Alex S. J. Wyatt,Timothy B. King,I‐Huan Lee,James J. Leichter

{"title":"Coral Reef‐Level Upwelling in an Internal Wave Hotspot Modulated by Mesoscale Dynamics","authors":"Alex S. J. Wyatt,Timothy B. King,I‐Huan Lee,James J. Leichter","doi":"10.1029/2025gl121018","DOIUrl":"https://doi.org/10.1029/2025gl121018","url":null,"abstract":"Abstract Coral reefs in the northern South China Sea experience some of the world’s most energetic internal waves (IWs), yet records of how these dynamics influence reef‐level conditions are rare. Using over 6 years of temperature data from Dongsha Atoll, we show that IWs drive diel temperature fluctuations that reduce subsurface heat exposure and entrain cool, nitrate‐rich water onto the reef slope. This internal‐wave‐driven upwelling is strongly modulated by mesoscale circulation: positive sea‐level anomalies associated with Kuroshio intrusion and long‐lived anticyclonic eddies cause a two‐stage suppression of internal‐wave generation and arrival, first near the Luzon Strait and subsequently over the reef. Reduced reef‐slope internal‐wave expression lowered nitrate exposure by >100‐fold at the reef. Typhoons injected near‐inertial energy but were followed by declines in cooling and nitrate supply until restratification. These results demonstrate mesoscale and episodic processes regulating internal‐wave cooling and nutrient upwelling, revealing coupled, multi‐scale physical‐biogeochemical controls on reef resilience under ocean warming.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"37 1","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149209648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ENSO's Imprint on the Southern Ocean: Wind Waves Drive Surface Cross-Frontal Flow ENSO在南大洋上的印记：风浪驱动表面横锋流

IF 5 1区地球科学

Geophysical Research Letters Pub Date : 2026-10-15 DOI: 10.1029/2026GL124921

Hajin Song, Jae-Hun Park, Jeong-Yeob Chae, Kathleen A. Donohue, D. Randolph Watts, Ahyoung Ku, Kiduk Kim, Tae-Wan Kim, Jisoo Park

{"title":"ENSO's Imprint on the Southern Ocean: Wind Waves Drive Surface Cross-Frontal Flow","authors":"Hajin Song, Jae-Hun Park, Jeong-Yeob Chae, Kathleen A. Donohue, D. Randolph Watts, Ahyoung Ku, Kiduk Kim, Tae-Wan Kim, Jisoo Park","doi":"10.1029/2026GL124921","DOIUrl":"https://doi.org/10.1029/2026GL124921","url":null,"abstract":"Tropical teleconnection associated with El Niño–Southern Oscillation (ENSO) is widely recognized for regulating multiple physical processes in the Southern Ocean. However, despite its influence on Southern Ocean wind patterns, the response of surface flow has received little attention. Here, we investigate surface flow in the Southern Ocean using surface-drifting buoy trajectories collected during September 2022–May 2023 and November 2023–June 2024. Drifter observations exhibit significant cross-frontal movements primarily driven by Stokes drift rather than Ekman velocity. The observations also show interannual variability, with strong poleward cross-frontal flow in 2024 during a strong El Niño event. Further analyses over the past approximately 31 years indicate that ENSO teleconnection is the primary driver of this interannual variability. These findings provide a new perspective on how tropical teleconnection influences cross-frontal flow via wind waves and highlight their potential role in tracer transport across fronts.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"53 20","pages":""},"PeriodicalIF":5.0,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2026GL124921","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149177261","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

Fractal Dimension of Shallow Cumulus Cloud Boundaries Beyond Bulk Fractal Scaling 体分形尺度下浅积云边界的分形维数

IF 5.2 1区地球科学

Geophysical Research Letters Pub Date : 2026-10-15 DOI: 10.1029/2026gl123830

Qiqi Song,Jingyi Chen,Martin Janssens,Chunsong Lu

{"title":"Fractal Dimension of Shallow Cumulus Cloud Boundaries Beyond Bulk Fractal Scaling","authors":"Qiqi Song,Jingyi Chen,Martin Janssens,Chunsong Lu","doi":"10.1029/2026gl123830","DOIUrl":"https://doi.org/10.1029/2026gl123830","url":null,"abstract":"Abstract Cloud boundaries reflect turbulent mixing and cloud–environment interactions, but their geometric complexity remains poorly quantified. Here, we investigate the complexity of shallow cumulus cloud edge using two fractal approaches: the bulk area–perimeter method and the individual‐cloud box‐counting method. Using large‐eddy simulations, we find that the box‐counting dimension better captures boundary complexity by resolving cloud‐scale irregularities, whereas the bulk dimension smooths individual morphological variability. Larger clouds exhibit higher box‐counting dimensions and increased deviations from idealized stochastic self‐similar scaling, indicating increasing boundary heterogeneity with cloud size and shape complexity. Wind induces scale‐dependent morphological responses, smoothing small clouds while enhancing boundary complexity in larger clouds through competing dynamical effects. Moreover, box‐counting dimension shows a stronger association with precipitation‐related properties, suggesting a closer link between boundary evolution and cloud processes. These results highlight individual‐cloud fractal analysis as a useful framework for quantifying shallow cumulus complexity and its environmental controls.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"7 20 1","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149209634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Patch Interactions on a Heterogeneous Fault Drive Nearby Slow and Fast Earthquakes 慢地震和快地震附近非均质断层驱动的斑块相互作用

IF 5 1区地球科学

Geophysical Research Letters Pub Date : 2026-10-15 DOI: 10.1029/2026GL123096

Yuki Watanabe, Yuta Mitsui

{"title":"Patch Interactions on a Heterogeneous Fault Drive Nearby Slow and Fast Earthquakes","authors":"Yuki Watanabe, Yuta Mitsui","doi":"10.1029/2026GL123096","DOIUrl":"https://doi.org/10.1029/2026GL123096","url":null,"abstract":"Tectonic tremor and repeating/regular earthquakes off Iwate in the shallow Japan Trench occur episodically and in spatially overlapping areas, implying a common aseismic driver. We investigate how small aseismic slip triggers events across multiple slip-rate regimes using fully dynamic earthquake-cycle simulations governed by rate-and-state friction. Along-fault heterogeneity is imposed by alternating velocity-weakening (VW) and velocity-strengthening (VS) patches, and events are classified based on peak slip velocity <math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>V</mi>\u0000 <mi>max</mi>\u0000 </msub>\u0000 </mrow>\u0000 <annotation> ${V}_{max }$</annotation>\u0000 </semantics></math>. A single VW patch produces only aseismic events, whereas a multi-patch heterogeneous model generates sub-seismic slip and earthquakes, often nearly synchronous across VW patches. Inter-event transient slip in VS patches raises stress during subsequent VW nucleation. Transitions in <math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>V</mi>\u0000 <mi>max</mi>\u0000 </msub>\u0000 </mrow>\u0000 <annotation> ${V}_{max }$</annotation>\u0000 </semantics></math> and rupture properties are controlled by subtle stress differences between nucleating VW patches and surrounding VS patches. This mechanism provides a simple physical explanation for why slow and fast earthquakes can emerge from interacting fault patches with spatial overlap and close temporal proximity.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"53 20","pages":""},"PeriodicalIF":5.0,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2026GL123096","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149177224","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

Mechanical Irreversibility and Strength Overcompensation in a Gypsum Dehydration–Rehydration Cycle 石膏脱水-再水合循环中的机械不可逆性和强度过补偿

IF 5.2 1区地球科学

Geophysical Research Letters Pub Date : 2026-10-15 DOI: 10.1029/2026gl125928

Yang Zheng,Kang Duan,Huiru Lei,Di Wang,Qiangyong Zhang,Dejun Liu

引用次数: 0

Regime Shifts During Compound Drought-Heatwave Events Amplify Ecosystem and Heat Stress Risks 复合干旱热浪事件期间的制度变化放大了生态系统和热应激风险

IF 5 1区地球科学

Geophysical Research Letters Pub Date : 2026-10-15 DOI: 10.1029/2026GL125653

Yi Yang, Jianping Tang

引用次数: 0

Micromechanical Insights Into the Cyclic Behavior of Fault-Valve Systems 故障阀系统循环行为的微观力学见解

IF 5 1区地球科学

Geophysical Research Letters Pub Date : 2026-10-15 DOI: 10.1029/2026GL124845

Oussama Larkem, Luc Scholtès, Fabrice Golfier

{"title":"Micromechanical Insights Into the Cyclic Behavior of Fault-Valve Systems","authors":"Oussama Larkem, Luc Scholtès, Fabrice Golfier","doi":"10.1029/2026GL124845","DOIUrl":"https://doi.org/10.1029/2026GL124845","url":null,"abstract":"Cyclic fluid pressurization can promote repeated fault reactivation and transient permeability changes, a behavior often discussed within the fault-valve concept in which faults alternate between acting as hydraulic barriers and conduits. To investigate the micromechanical processes involved during fluid induced reactivations, we simulate cyclic fluid injection into a pre-sheared granular gouge using a discrete element model. The simulations reproduce key behaviors observed in laboratory and in situ studies and reveal pronounced cycle-to-cycle variability in the onset of reactivation and slip magnitude. Some cycles generate large slip episodes, whereas others produce comparatively small slip under similar loading conditions. Micromechanical analysis of force-chain evolution reveals a strong inverse correlation between slip magnitude and the population of load-bearing chains, with sparser force-chain backbones generating larger slip events. Our results highlight the role of micromechanical processes in controlling macroscopic cyclic fault behavior, offering a physically grounded perspective on fault-valve behavior.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"53 20","pages":""},"PeriodicalIF":5.0,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2026GL124845","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149177542","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

Potential Benefits of Assimilating Phased Array Radar Data for Convective‐Scale Analysis and Prediction of Supercell Storms: A Proof‐of‐Concept OSSE Study 同化相控阵雷达数据对对流尺度分析和超级单体风暴预测的潜在好处：一项概念验证OSSE研究

IF 5.2 1区地球科学

Geophysical Research Letters Pub Date : 2026-10-15 DOI: 10.1029/2026gl125172

Jidong Gao,Derek R. Stratman

{"title":"Potential Benefits of Assimilating Phased Array Radar Data for Convective‐Scale Analysis and Prediction of Supercell Storms: A Proof‐of‐Concept OSSE Study","authors":"Jidong Gao,Derek R. Stratman","doi":"10.1029/2026gl125172","DOIUrl":"https://doi.org/10.1029/2026gl125172","url":null,"abstract":"Abstract This study investigates the impact of phased array radar (PAR) scanning strategies on short‐term convective‐scale analyses and forecasts through an Observing System Simulation Experiment framework. The Weather Research and Forecasting model, coupled with the Data Assimilation Research Testbed ensemble adjustment Kalman filter, is used to assimilate synthetic radar observations from PAR and WSR‐88D scanning strategies across three idealized supercell cases: slow‐moving, fast‐moving, and fast‐moving/fast‐growing storms. For the slow‐moving storm, PAR and WSR‐88D experiments produce comparable analyses and forecasts, with only marginal improvement from PAR. In contrast, for fast‐moving and fast‐growing storms, the 5‐min WSR‐88D scan introduces substantial temporal errors associated with storm advection and evolution, resulting in distorted storm structure. The rapid 1‐min update capability of PAR significantly reduces these errors, producing superior analyses and forecasts. These findings suggest that the implementation of a future US national PAR network would substantially enhance the accuracy of short‐term severe weather forecasts.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"86 1","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149209635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0