Geophysical Research Letters最新文献_第3页

Hydroacoustic Observations Reveal Drivers of Mixing and Salinization of a Karst Subterranean Estuary During Intense Precipitation 水声观测揭示强降水期间喀斯特地下河口混合和盐碱化的驱动因素

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-16 DOI: 10.1029/2024GL109993

Neil K. Ganju, John W. Pohlman, Steven E. Suttles, David Brankovits

{"title":"Hydroacoustic Observations Reveal Drivers of Mixing and Salinization of a Karst Subterranean Estuary During Intense Precipitation","authors":"Neil K. Ganju, John W. Pohlman, Steven E. Suttles, David Brankovits","doi":"10.1029/2024GL109993","DOIUrl":"10.1029/2024GL109993","url":null,"abstract":"Karst subterranean estuaries within globally ubiquitous carbonate aquifers are coastal groundwater ecosystems that provide an essential water resource for human populations. To understand the drivers of salinization within a coastal aquifer in the Yucatan Peninsula (Mexico), we employed hydroacoustics in flooded caves to observe how oceanic and atmospheric events facilitate mixing between the meteoric lens (fresh-brackish groundwater) and the saline groundwater on tidal and episodic timescales. Precipitation during Tropical Storm Carlotta increased the flow and salinity of the meteoric lens without evidence for vertical mixing across the halocline. We postulate that vertical migration of haloclines in the conduit relative to those within the rock matrix during precipitation creates lateral density gradients that drive mixing, and ultimately creates a brackish layer within the meteoric lens. These results provide a mechanistic explanation for vertical and lateral exchange in a coastal carbonate aquifer, which has implications for groundwater response to future climatic change.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 22","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL109993","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642817","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

Satellite Geodesy Uncovers 15 m of Slip on a Detachment Fault Prior to the 2018 Collapse at Anak Krakatau, Indonesia 卫星大地测量发现印度尼西亚喀拉喀托火山在 2018 年崩塌前有 15 米的剥离断层滑动

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-16 DOI: 10.1029/2024GL112296

Young Cheol Kim, Christelle Wauthier, Thomas R. Walter

引用次数: 0

New Late Cretaceous Paleomagnetic Results From the Eastern Qiangtang Terrane: Implications for the Postcollisional Extrusion and Convergence of the Southeastern Tibetan Plateau 东羌塘地层晚白垩世古地磁新发现：对青藏高原东南部碰撞后挤压和辐合的影响

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-16 DOI: 10.1029/2024GL112055

Jiahui Ma, Tianshui Yang, Fei Han, Jiacheng Liang, Xianwei Jiao, Suo Wang, Weiwei Bian, Yiming Ma, Shihong Zhang, Huaichun Wu, Haiyan Li

{"title":"New Late Cretaceous Paleomagnetic Results From the Eastern Qiangtang Terrane: Implications for the Postcollisional Extrusion and Convergence of the Southeastern Tibetan Plateau","authors":"Jiahui Ma, Tianshui Yang, Fei Han, Jiacheng Liang, Xianwei Jiao, Suo Wang, Weiwei Bian, Yiming Ma, Shihong Zhang, Huaichun Wu, Haiyan Li","doi":"10.1029/2024GL112055","DOIUrl":"https://doi.org/10.1029/2024GL112055","url":null,"abstract":"To refine the postcollisional extrusion and convergence history of the southeastern Tibetan Plateau, we report a quality paleomagnetic data set from Upper Cretaceous redbeds of the eastern Qiangtang Terrane (QT), where is situated at the front edge of eastern Himalayan Syntaxis. The 32 site-mean directions provide a mean pole at 75.4°N, 176.8°E (A95 = 2.4°) and a paleolatitude of 31.8 ± 2.4°N for the Mangkang area. Comparison with reliable Late Cretaceous paleomagnetic data from the eastern QT and East Asia indicates that the eastern QT experienced a southward extrusion of 940 ± 310 km after the Late Cretaceous. Comparing Late Cretaceous paleolatitudes estimated from the eastern QT and Lhasa terrane (LT) reveals a paleolatitude difference of 2,390 ± 620 km. Such a great latitudinal convergence can be attributed to the fact that some continental terranes originally located between the eastern LT and QT were laterally extruded after the Late Cretaceous.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 22","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL112055","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665037","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

Energy Conversion Associated With Anomalous Magnetic Topology Sublayers in the Inner Low-Latitude Boundary Layer 与内低纬度边界层异常磁拓扑子层有关的能量转换

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-16 DOI: 10.1029/2024GL112664

Ping Zhong, Zhihong Zhong, Meng Zhou, Ye Pang, Liangjin Song, Xiaohua Deng

{"title":"Energy Conversion Associated With Anomalous Magnetic Topology Sublayers in the Inner Low-Latitude Boundary Layer","authors":"Ping Zhong, Zhihong Zhong, Meng Zhou, Ye Pang, Liangjin Song, Xiaohua Deng","doi":"10.1029/2024GL112664","DOIUrl":"10.1029/2024GL112664","url":null,"abstract":"The low-latitude boundary layer (LLBL) is a crucial region for the transfer of mass, momentum, and energy between the solar wind and the planetary magnetosphere. However, the processes of energy conversion within this layer are not well understood. In this study, the anomalous magnetic topology sublayers (AMTSs) within Earth's inner LLBL are investigated during the local reconnection inactive period, using data from the Magnetospheric Multiscale (MMS) mission. We present the first in situ observations showing that these AMTSs lead to significant energy conversion within the inner LLBL. The electron populations in AMTSs are dominated by either the magnetospheric or magnetosheath populations, creating a substantial electron temperature gradient between these sublayers. This temperature gradient, in turn, generates non-ideal electric fields through the pressure gradient term. Our findings improve the understanding of dynamics in the planetary LLBL, highlighting the importance of AMTSs in the energy conversion process.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 22","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL112664","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642866","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

Dynamically Triggered Tectonic Tremors and Earthquakes in the Caucasian Region Following the 2023 Kahramanmaraş, Türkiye, Earthquake Sequence 2023 年土耳其卡赫拉曼马拉什地震序列之后高加索地区动态触发的构造震荡和地震

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-16 DOI: 10.1029/2024GL110786

Dongdong Yao, Zhigang Peng, Chang Ding, Eric Sandvol, Tea Godoladze, Gurban Yetirmishli

{"title":"Dynamically Triggered Tectonic Tremors and Earthquakes in the Caucasian Region Following the 2023 Kahramanmaraş, Türkiye, Earthquake Sequence","authors":"Dongdong Yao, Zhigang Peng, Chang Ding, Eric Sandvol, Tea Godoladze, Gurban Yetirmishli","doi":"10.1029/2024GL110786","DOIUrl":"10.1029/2024GL110786","url":null,"abstract":"Deep tectonic tremor has been observed along major subduction zones and several continental strike-slip faults around the Pacific Rim and the Caribbean. However, it has not be widely identified in other tectonically active regions such as the Alpine-Himalayan orogenic belt yet. Here we present dynamically triggered tremors and microearthquakes in the Caucasian Region following the 2023 Mw 7.8 and Mw 7.5 mainshocks in the 2023 Kahramanmaraş, Türkiye, earthquake sequence. We observe triggered deep tectonic tremors within Azerbaijan, where seismological evidences suggest pre-existing subduction slabs. Meanwhile, we document cases of triggered earthquakes in Azerbaijan and Georgia, and Javakheti highland near the border of Georgia and Armenia. These triggered earthquakes are either associated with mud volcanism or volcanic formations. Our results highlight a variety of responses to dynamic stress perturbations, suggesting high susceptibility to dynamic stress perturbations and a broad spectrum of slip behaviors for critically stressed faults in the Caucasian region.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 22","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL110786","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645895","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

On the Relationship Between the Banded Hiss Distribution and Plasmapause Location: A Survey of Van Allen Probes Observations 带状嘶嘶声分布与质点位置之间的关系：范艾伦探测器观测调查

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-16 DOI: 10.1029/2024GL111893

Junhu Dong, Zheng Xiang, Binbin Ni

引用次数: 0

Investigating the “Too Bright” Issue Pertaining to Non-PBL Clouds Over the South Pacific Trade-Wind Region in CMIP6 Global Climate Models 调查 CMIP6 全球气候模式中与南太平洋贸易风区域上空非 PBL 云有关的 "太亮 "问题

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-16 DOI: 10.1029/2024GL112006

J.-L. F. Li, Kuan-Man Xu, Jonathan H. Jiang, Wei-Liang Lee, Jia-Yuh Yu, Jiun-dar Chern, Gregory V. Cesana, Longtao Wu, Graeme Stephens

{"title":"Investigating the “Too Bright” Issue Pertaining to Non-PBL Clouds Over the South Pacific Trade-Wind Region in CMIP6 Global Climate Models","authors":"J.-L. F. Li, Kuan-Man Xu, Jonathan H. Jiang, Wei-Liang Lee, Jia-Yuh Yu, Jiun-dar Chern, Gregory V. Cesana, Longtao Wu, Graeme Stephens","doi":"10.1029/2024GL112006","DOIUrl":"10.1029/2024GL112006","url":null,"abstract":"This paper examines the “too bright” issue pertaining to non-planetary boundary layer (PBL) clouds over the South Pacific trade-wind region and its potential link to the falling ice radiative effects (FIREs). We run sensitivity experiments with CESM2-CAM6 (CESM2) global climate model with FIREs on (SON) and off (NOS). The model exhibits more in-cloud liquid water content (CLWC) and droplet above the PBL in NOS, leading to larger shortwave (SW) reflectivity at the top of the atmosphere than in SON over the trade wind regions. CMIP6 models are divided into three subsets: separately calculates the radiative effects of cloud ice and falling ice (SON2), combined (SON1) and without falling ice (NOS). SON2 models exhibit improved CLWC and SW reflectivity similar to CESM2-SON, while NOS and SON1 models are akin to CESM2-NOS owing to weaker surface wind stress and warmer ocean surface, caused by the lack of FIREs over the convective zones.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 22","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL112006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645894","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

Electrical Conductivity of (Mg, Fe)CO3 at the Spin Crossover and Its Implication for Mid-Mantle Geomagnetic Heterogeneities 自旋交叉点上（镁、铁）CO3 的电导率及其对中幔地磁异质性的影响

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-15 DOI: 10.1029/2024GL111046

Chaoshuai Zhao, Jin Liu, Liangxu Xu, Mingqiang Hou, Yukai Zhuang, Jie Zhu, Jung-Fu Lin

{"title":"Electrical Conductivity of (Mg, Fe)CO3 at the Spin Crossover and Its Implication for Mid-Mantle Geomagnetic Heterogeneities","authors":"Chaoshuai Zhao, Jin Liu, Liangxu Xu, Mingqiang Hou, Yukai Zhuang, Jie Zhu, Jung-Fu Lin","doi":"10.1029/2024GL111046","DOIUrl":"10.1029/2024GL111046","url":null,"abstract":"(Mg, Fe)CO3 is an important deep carbon carrier and plays a vital role in our understanding of lower-mantle carbon reservoirs. The electrical conductivity (EC) of FeCO3 was measured at 126−2000 K up to 83 GPa in diamond-anvil cells using a standard four-probe van der Pauw method. Moreover, the EC of FeCO3 increases by ∼6 orders of magnitude from 300 to 1500 K at 10−20 GPa, indicating a strong effect of high temperature. The EC of Fe0.65Mg0.35CO3 was measured up to 60 GPa at 300 K, the EC values of (Mg, Fe)CO3 are proportional to iron content and increase by 2–3 orders of magnitude at 300 K across the spin crossover. The EC values of (Mg, Fe)CO3 and FeCO3 + Fe3O4 ± C mixtures surpass that of bridgmanite, ferropericlase and davemaoite by ∼1–4 orders of magnitude at depths of 800–2,000 km. This result sheds insights into the genesis of local geomagnetic heterogeneities in the mid-lower mantle.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 22","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL111046","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637830","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

Shallow Lake, Strong Shake: Record of Seismically Triggered Lacustrine Sedimentation From the 1959 M7.3 Hebgen Lake Earthquake Within Henrys Lake, Idaho 浅湖，强震：爱达荷州亨利斯湖内 1959 年 M7.3 级希布根湖地震引发的湖底沉积记录

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-15 DOI: 10.1029/2024GL110889

Sylvia R. Nicovich, Christopher B. DuRoss, Jessica A. Thompson Jobe, Jessica R. Rodysill, Richard W. Briggs, Alexandra E. Hatem, Madeleine M. Tan, Yann Gavillot, Noah S. Lindberg, Laura E. Strickland, Jason S. Padgett

{"title":"Shallow Lake, Strong Shake: Record of Seismically Triggered Lacustrine Sedimentation From the 1959 M7.3 Hebgen Lake Earthquake Within Henrys Lake, Idaho","authors":"Sylvia R. Nicovich, Christopher B. DuRoss, Jessica A. Thompson Jobe, Jessica R. Rodysill, Richard W. Briggs, Alexandra E. Hatem, Madeleine M. Tan, Yann Gavillot, Noah S. Lindberg, Laura E. Strickland, Jason S. Padgett","doi":"10.1029/2024GL110889","DOIUrl":"10.1029/2024GL110889","url":null,"abstract":"We investigate a shallow lake basin for evidence of a large historic intraplate earthquake in western North America. Henrys Lake, Idaho is an atypical candidate for lacustrine paleoseismic study given its shallow depth (∼7 m) and low relief (≤2° slopes). Here, we test the earthquake-recording capacity of this basin type by showing sedimentological evidence of the 1959 M7.3 Hebgen Lake earthquake within sediment cores, using anthropogenically produced 137Cs activity to constrain timing. In addition to expanding the morphologic range of basins targeted for lacustrine paleoseismic studies, this work has implications for sediment response in dam-enhanced basins. Lack of sedimentological evidence for other earthquakes coupled with radiocarbon chronology reveals that the 1959 event is the only clearly recorded earthquake within Henrys Lake since the mid-Holocene. Henrys Lake offers a proxy for paleo-earthquake signatures within similar lacustrine environments and underscores the importance of further paleoseismic studies in the region.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 22","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL110889","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637598","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

Relaxation States of Large Impact Basins on Mercury Based on MESSENGER Data 基于 MESSENGER 数据的水星上大型撞击盆地的弛豫状态

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-15 DOI: 10.1029/2024GL110748

Claudia Szczech, Adrien Broquet, Ana-Catalina Plesa, Aymeric Fleury, Michaela Walterová, Alexander Stark, Jürgen Oberst

{"title":"Relaxation States of Large Impact Basins on Mercury Based on MESSENGER Data","authors":"Claudia Szczech, Adrien Broquet, Ana-Catalina Plesa, Aymeric Fleury, Michaela Walterová, Alexander Stark, Jürgen Oberst","doi":"10.1029/2024GL110748","DOIUrl":"10.1029/2024GL110748","url":null,"abstract":"The crustal structure of Mercury's large impact basins provides valuable insights into the planet's geological history. For a warm crust, a post-impact basin structure will viscously relax with inward flow of crustal materials toward the basin center. This effect drastically diminishes the crustal thickness contrasts and associated Bouguer gravity contrasts between the basin center and its surroundings. Here, we analyze Bouguer contrasts of 36 basins (diameter <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>></mo>\u0000 </mrow>\u0000 <annotation> ${ >} $</annotation>\u0000 </semantics></math>300 km) located in the northern hemisphere as a proxy for viscoelastic relaxation. Thermal evolution models, assuming the present 3:2 spin-orbit configuration, are used to predict crustal temperatures. Our analysis reveals that the expected correlation between zones of warm crust and low Bouguer contrast from relaxation is not observed in the available data. This suggests that crustal temperatures have changed in the past, potentially due to a change in Mercury's orbit or to a major volcanic event associated with smooth plain formation.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 22","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL110748","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637599","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