Geophysical Research Letters最新文献_第6页

Recently Intensified Tropical-Extratropical Linkage Modulated by Arctic Sea Ice Loss 由北极海冰损失调制的近期增强的热带-温带联系

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-05-21 DOI: 10.1029/2024GL114436

Xiang Zhang, Bingyi Wu

引用次数: 0

Constraining Kilometer-Scale Mountain Snow Transport and Snowshed Areas 限制公里尺度山地雪运输和雪区

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-05-20 DOI: 10.1029/2024GL113599

E. N. Boardman

引用次数: 0

A Unique Mechanism of Ozone Surges Jointly Triggered by Deep Stratospheric Intrusions and the Tibetan Plateau Topographic Forcing 平流层深层侵入和青藏高原地形强迫共同触发臭氧暴增的独特机制

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-05-19 DOI: 10.1029/2024GL114207

Yuqing Zhang, Tianliang Zhao, Guicai Ning, Xiangde Xu, Zhixiong Chen, Mengwei Jia, Xiaoyun Sun, Zhuozhi Shu, Zhen Lu, Jane Liu, Xiushu Qie

{"title":"A Unique Mechanism of Ozone Surges Jointly Triggered by Deep Stratospheric Intrusions and the Tibetan Plateau Topographic Forcing","authors":"Yuqing Zhang, Tianliang Zhao, Guicai Ning, Xiangde Xu, Zhixiong Chen, Mengwei Jia, Xiaoyun Sun, Zhuozhi Shu, Zhen Lu, Jane Liu, Xiushu Qie","doi":"10.1029/2024GL114207","DOIUrl":"10.1029/2024GL114207","url":null,"abstract":"Given our poor understanding on mechanisms of stratospheric intrusions (SI) upon near-surface ozone (O3) surges, predicting the SI-induced O3 pollution pose inherent difficulties. Taking a wintertime O3 surge episode over the Sichuan Basin (SCB) as an example, we find SI contribute 47.8% to near-surface O3 levels and reveal the underlying mechanisms. Tropopause folding nearly extends to the deep atmospheric boundary layer over the Tibetan Plateau (TP) due to topographic forcing, driving stratospheric O3 penetration into the TP's near-surface. The intruded O3 is subsequently transported into the downstream SCB by strong downdrafts along the TP's leeward slope. Interestingly, the mountain-plains solenoid between the TP and the SCB strengthens the downward intrusions of O3 during both daytime and nighttime, further amplifying the contribution of SI to the SCB's near-surface O3 levels. This unique mechanism of O3 surges could provide new insights for the forecast of unexpected nocturnal high-O3 episodes.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 10","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL114207","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144087943","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

WoFSCast: A Machine Learning Model for Predicting Thunderstorms at Watch-to-Warning Scales WoFSCast：从观察到警告级别预测雷暴的机器学习模型

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-05-19 DOI: 10.1029/2024GL112383

Montgomery L. Flora, Corey Potvin

{"title":"WoFSCast: A Machine Learning Model for Predicting Thunderstorms at Watch-to-Warning Scales","authors":"Montgomery L. Flora, Corey Potvin","doi":"10.1029/2024GL112383","DOIUrl":"https://doi.org/10.1029/2024GL112383","url":null,"abstract":"Developing AI models that match or exceed the forecast skill of numerical weather prediction (NWP) systems but run much more quickly is a burgeoning area of research. Most AI-NWP models, however, have been trained on global ECMWF Reanalysis version 5 data, which does not resolve storm-scale evolution. We have therefore adapted Google's GraphCast framework for limited-area, storm-scale domains, then trained on archived forecasts from the Warn-on-Forecast System (WoFS), a convection-allowing ensemble with 5-min forecast output. We evaluate the WoFSCast predictions using object-based verification, grid-based verification, spatial storm structure assessments, and spectra analysis. The WoFSCast closely emulates the WoFS environment fields, matches 70%–80% of WoFS storms out to 2-hr forecast times, and suffers only modest blurring. When verified against observed storms, WoFSCast produces contingency table statistics and fractions skill scores similar to WoFS. WoFSCast demonstrates that AI-NWP can be extended to rapidly evolving, small-scale phenomena like thunderstorms.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 10","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL112383","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144085011","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

Trans-Seasonal Vegetation-Land-Atmosphere Interactions Explained Record-Breaking Cascading Extremes in the Upper Reaches of the Yangtze River 跨季节植被-陆地-大气相互作用解释了长江上游破纪录的级联极端现象

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-05-19 DOI: 10.1029/2024GL114165

Ning An, Yang Chen, Zhen Liao, Jianying Li

{"title":"Trans-Seasonal Vegetation-Land-Atmosphere Interactions Explained Record-Breaking Cascading Extremes in the Upper Reaches of the Yangtze River","authors":"Ning An, Yang Chen, Zhen Liao, Jianying Li","doi":"10.1029/2024GL114165","DOIUrl":"https://doi.org/10.1029/2024GL114165","url":null,"abstract":"The upper reaches of the Yangtze River observed record-breaking droughts, heatwaves, and forest fires in rapid sequence during the 2022 summer, challenging the established mechanistic understanding. We here explained the compound event through a trans-seasonal vegetation-land-atmosphere interacting perspective. The wetter spring-sunnier summer pattern resulted in record high loads of vegetation and enhanced transpiration. This led to progressive depletion of soil moisture to a critical threshold that shifted the originally weak response of air temperature into hypersensitive mode. The resulting rapid rise of air temperature amplified atmospheric evaporative demand to an unprecedentedly high level, which in turn exacerbated the drying-out of soil and vegetation. These favorable weather and fuel factors combined to cause unseasonal forest fires of unprecedented burning intensity. Our results remind of preparedness against drought-heat-fire compounding hazards even in humid regions under opportune configurations between ecological and meteorological conditions.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 10","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL114165","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144085010","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

Clustering to Characterize Extreme Marine Conditions for the Benthic Region of the Northeastern Pacific Continental Margin 东北太平洋大陆边缘底栖区极端海洋条件的聚类特征

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-05-19 DOI: 10.1029/2024GL112591

Amber M. Holdsworth, Andrew Shao, James R. Christian

{"title":"Clustering to Characterize Extreme Marine Conditions for the Benthic Region of the Northeastern Pacific Continental Margin","authors":"Amber M. Holdsworth, Andrew Shao, James R. Christian","doi":"10.1029/2024GL112591","DOIUrl":"10.1029/2024GL112591","url":null,"abstract":"Anthropogenic <math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mtext>CO</mtext>\u0000 <mn>2</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation> ${text{CO}}_{2}$</annotation>\u0000 </semantics></math> emissions lead to ocean warming, deoxygenation and acidification. Superimposed on long-term trends are episodic extremes of temperature, oxygen, and acidity. Here we present an innovative method for assessing single and compound extremes using a high-resolution regional model of the Northeastern Pacific Ocean. We use an unsupervised clustering approach to identify regions with similar habitat characteristics near the seafloor, define extreme thresholds seasonally using a fixed baseline (1996–2020) within each cluster, and quantify the fraction of ocean waters that exceed these thresholds for both single and compound stressors. Compound extremes (most commonly of <math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>O</mi>\u0000 <mn>2</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation> ${mathrm{O}}_{2}$</annotation>\u0000 </semantics></math> and acidification) are rare but show an increasing trend in some clusters. Potential predictability of occurrence of extremes is demonstrated by correlation with basin-scale climate variability.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 10","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL112591","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144087938","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

Reflective Body Waves Extracted From 1 Month of Global Microseisms Illuminate the Perturbed Mantle Transition Zone Beneath SW Japan 从1个月的全球微震中提取的反射体波照亮了日本西南部的扰动地幔过渡带

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-05-19 DOI: 10.1029/2025GL116419

Ping Zhang, Kiwamu Nishida, Hongjian Fang

引用次数: 0

CYGNSS Satellite Sampling of Surface Heat Fluxes Across Atmospheric River Life Cycles 横跨大气河流生命周期的CYGNSS卫星地表热通量采样

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-05-19 DOI: 10.1029/2024GL113370

Shakeel Asharaf, Bin Guan, Duane E. Waliser

引用次数: 0

Modeling the Interplay Between Reaction Progress, Deformation and Stress Field Evolution During Antigorite Dehydration: Implications for Intermediate-Depth Seismicity 反长岩脱水过程中反应过程、变形和应力场演化相互作用的模拟：对中深地震活动性的启示

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-05-19 DOI: 10.1029/2024GL113865

Kristóf Porkoláb, Evangelos Moulas, Stefan M. Schmalholz

{"title":"Modeling the Interplay Between Reaction Progress, Deformation and Stress Field Evolution During Antigorite Dehydration: Implications for Intermediate-Depth Seismicity","authors":"Kristóf Porkoláb, Evangelos Moulas, Stefan M. Schmalholz","doi":"10.1029/2024GL113865","DOIUrl":"https://doi.org/10.1029/2024GL113865","url":null,"abstract":"Dehydration reactions in subducted slabs have long been correlated with embrittlement and intermediate-depth earthquakes. However, the physical process of dehydration embrittlement remains unclear due to the complex and poorly constrained interactions between reaction progress, fluid pressure evolution, and deformation. Here we aim to quantify these interactions during antigorite dehydration with 2D hydro-mechanical-chemical numerical modeling and explore whether the reaction causes stress perturbations potentially leading to earthquakes. Negative total volume change during the reaction acts toward the relaxation of fluid overpressures, decreasing the chance of embrittlement. The reaction zone is the least likely to fracture due to reaction-induced weakening and the locally larger increase of total pressure compared to fluid pressure. However, weakening also generates fluid overpressure zones and may induce strain localization/runaway processes potentially leading to brittle failure. Our results also imply that antigorite dehydration could be both the cause and effect of fast deformation in subducted slabs.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 10","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL113865","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144091553","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

Variability of Earth's Magnetopause and Bow Shock Locations Modeled via Multi-Decade Solar Wind Observations 通过数十年太阳风观测模拟的地球磁层顶和弓形激波位置的变化

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-05-19 DOI: 10.1029/2025GL115462

Kiley L. Yeakel, Ian Cohen, Drew L. Turner

引用次数: 0