IF 5.4 1区地球科学

Water Resources Research Pub Date : 2025-09-06 DOI: 10.1029/2025wr039936

Manhua Luo, Hailong Li, Kai Xiao, Wenjing Qu, Rong Mao

{"title":"Groundwater and Salinity Responses to Land Reclamation in Jiaozhou Bay (China): Field Observations and Modeling","authors":"Manhua Luo, Hailong Li, Kai Xiao, Wenjing Qu, Rong Mao","doi":"10.1029/2025wr039936","DOIUrl":"https://doi.org/10.1029/2025wr039936","url":null,"abstract":"Coastal groundwater dynamics and solute transport are influenced by multiple factors including land reclamation, evaporation, and tidal fluctuations. However, their quantitative impacts on groundwater flow and salinity distribution in large‐scale muddy tidal flats remain insufficiently understood. This study combines field measurements and numerical simulations to investigate hydraulic heads and groundwater salinity over a spring‐neap tidal cycle in a muddy intertidal transect at Jiaozhou Bay, China. Results show that seepage‐face evaporation significantly increases groundwater salinity toward land, with its intensity modulated by seasonal variability. Based on field observations, we propose a new concept of tidal run‐up, which highlights its role in elevating landward hydraulic heads during rising and high tides. Land reclamation significantly alters groundwater flow patterns, transforming the original multiple circulation cells into a single, large cell in which inland groundwater discharges across the entire intertidal zone. Salinity distribution is jointly controlled by inland freshwater input, evaporation, and tidal forcing. Numerical simulations reveal that land reclamation reduces both outflow and inflow fluxes, and the outflow fluxes along the aquifer‐ocean interface decrease from 12.1 m2/d before reclamation to 7.7 m2/d after reclamation during the observation period, with evaporation contributing 56% and 31% of the total outflow flux, respectively. These findings enhance the understanding of groundwater flow and solute transport in large‐scale muddy tidal flats, and offer important implications for biogeochemical processes in intertidal zones.","PeriodicalId":23799,"journal":{"name":"Water Resources Research","volume":"53 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145002946","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

Forged by bones: bonecoal metalworking process in NW Iberia iron age. The case of Borneiro (Galicia, Spain) 骨头锻造：伊比利亚西北部铁器时代的骨煤金属加工工艺。Borneiro案例（西班牙加利西亚）

IF 2 2区地球科学

Archaeological and Anthropological Sciences Pub Date : 2025-09-05 DOI: 10.1007/s12520-025-02307-2

Samuel Nión-Álvarez, Clara Veiga-Rilo

{"title":"Forged by bones: bonecoal metalworking process in NW Iberia iron age. The case of Borneiro (Galicia, Spain)","authors":"Samuel Nión-Álvarez, Clara Veiga-Rilo","doi":"10.1007/s12520-025-02307-2","DOIUrl":"10.1007/s12520-025-02307-2","url":null,"abstract":"<div><p>This paper analyses a metalworking area from the fortified site of A Cidá de Borneiro (Cabana de Bergantiños, Galicia, Spain). It is focused on a bronze and iron workshop (C9-12) where, in addition to abundant metallurgical evidence and production remains, a large number of thermally altered bone fragments have been documented. The present work proposes a multifactorial analysis to understand together these bones within the context of metalworking activities. For this purpose, an archaeological and functional analysis of the workshop is combined with a morphological study of the bone remains. First, a contextual analysis is defined, examining the archaeological evidence in order to define what kind of activities were developed in the area. Concurrently, a macroscopic analysis of the characteristics and conditions of the bones is carried out, with the aim of identifying thermal alteration processes. As will be demonstrated, this research will confirm that the bones were used as part of the operational production sequence, particularly during the hardening process of objects that require a strong and sharp edge. Finally, we will define and examine the characteristics of this technique from a point of view that encompasses both the technical and symbolic dimensions of metalworking.</p></div>","PeriodicalId":8214,"journal":{"name":"Archaeological and Anthropological Sciences","volume":"17 10","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12520-025-02307-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Deep Learning and Remote‐Sensed Observations Reveal Global Underestimation of River Obstructions 深度学习和遥感观测揭示全球对河流障碍物的低估

IF 5.4 1区地球科学

Water Resources Research Pub Date : 2025-09-05 DOI: 10.1029/2024wr039692

Mingxia He, Jie Niu, William J. Riley, Chaopeng Shen, Yi Zheng, John M. Melack, Dongwei Gui, Han Qiu, Mengyu Xie, Liwei Sun, Dongdong Liu, Yong Fu, Qixin Wu, Shaoqi Zhou, Pan Wu, Bill X. Hu

{"title":"Deep Learning and Remote‐Sensed Observations Reveal Global Underestimation of River Obstructions","authors":"Mingxia He, Jie Niu, William J. Riley, Chaopeng Shen, Yi Zheng, John M. Melack, Dongwei Gui, Han Qiu, Mengyu Xie, Liwei Sun, Dongdong Liu, Yong Fu, Qixin Wu, Shaoqi Zhou, Pan Wu, Bill X. Hu","doi":"10.1029/2024wr039692","DOIUrl":"https://doi.org/10.1029/2024wr039692","url":null,"abstract":"River obstructions are a subject of global concern due to their impact on river connectivity and aquatic ecosystems. However, detecting and quantifying these structures, especially small and undocumented ones, remains a major challenge due to limitations in existing data sets and detection methods. This study focuses on improving the global detection of river obstructions and revealing their spatial distribution patterns. We developed a deep‐learning‐based detection framework combined with manual validation, resulting in the Deep Learning‐Global River Obstructions Database, which comprises 50,061 river obstructions identified globally. This represents a 64% increase over previous estimates, which were based solely on manual identification. Spatial analyses reveal strong correlations between obstruction density and factors such as Gross Domestic Product, agricultural expansion, urbanization, and river morphology. By enhancing the precision and comprehensiveness of river obstruction data, our open‐source data set provides a solid foundation for accurate assessment of global river connectivity, basin‐to‐continental‐scale hydrological modeling, and impact assessments.","PeriodicalId":23799,"journal":{"name":"Water Resources Research","volume":"122 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145002949","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

Sources of marine carbonyl sulfide and its precursors traced by sulfur isotopes 用硫同位素追踪海洋羰基硫化物及其前体的来源

IF 4.5 1区地球科学

Limnology and Oceanography Pub Date : 2025-09-05 DOI: 10.1002/lno.70196

Chen Davidson, Alon Angert, Yasmin Avidani, Sinikka T. Lennartz, Marc von Hobe, Alon Amrani

{"title":"Sources of marine carbonyl sulfide and its precursors traced by sulfur isotopes","authors":"Chen Davidson, Alon Angert, Yasmin Avidani, Sinikka T. Lennartz, Marc von Hobe, Alon Amrani","doi":"10.1002/lno.70196","DOIUrl":"https://doi.org/10.1002/lno.70196","url":null,"abstract":"Carbonyl sulfide (OCS) is a major precursor of stratospheric sulfate aerosols and a proxy for terrestrial photosynthesis. In recent years, sulfur‐isotope measurements (δ34S) of OCS emerged as an approach to constrain the OCS budget. Yet, such measurements are still scarce for aquatic OCS. Here we present a large dataset of δ34S values of marine OCS. In addition, we present δ34S values of marine carbon disulfide (CS2) and dimethyl sulfide (DMS), which in the air, act as important precursors of tropospheric OCS. Samples were collected at the Atlantic Ocean, the Red Sea, the Mediterranean Sea, the Wadden Sea, and the North Sea. The gases were sampled by a water–air equilibrator, preserved in canisters, and analyzed via a preconcentration system coupled to a gas chromatograph connected to a multi‐collector inductively coupled plasma mass spectrometer. We found δ34S values of −3.8‰ to 19.4‰ for OCS, −10.5‰ to 20‰ for CS2, and 14–23‰ for DMS. These δ34S values are controlled mainly by two endmembers: production in the water column and production in sediments. Lab experiments suggest that the 34S‐fractionation of OCS photo‐production is 0.8‰ ± 0.5‰. In addition, based on measurements from the Atlantic Ocean, we calculated the 34S‐fractionation of OCS dark‐production as −6‰ ± 2‰. This new data significantly improves our knowledge of the sulfur isotope distribution of marine OCS and helps identify its different sources, sinks, and production pathways.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"16 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145003144","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

Global Hotspots for Sea-Level Changes: Decadal Extremes and Uncertainties From CMIP6 Models 海平面变化的全球热点：来自CMIP6模式的年代际极值和不确定性

IF 2.6 3区地球科学

Earth and Space Science Pub Date : 2025-09-05 DOI: 10.1029/2025EA004402

Salah Basem Ajjur, Emanuele Di Lorenzo, Baylor Fox-Kemper

{"title":"Global Hotspots for Sea-Level Changes: Decadal Extremes and Uncertainties From CMIP6 Models","authors":"Salah Basem Ajjur, Emanuele Di Lorenzo, Baylor Fox-Kemper","doi":"10.1029/2025EA004402","DOIUrl":"https://doi.org/10.1029/2025EA004402","url":null,"abstract":"<p>Knowledge is limited regarding decadal extremes and uncertainties of sea-level change (SLC) at the regional scale, which necessitates the need for better understanding of these changes to enhance future coastal preparedness. To this end, we examined sea-level extremes for 23 World reference regions based on tide gauges (TGs) observations from 1950 to 2014. We then used these observations to evaluate the fidelity of climate models and earth system models (ESMs) participating in the Coupled Model Intercomparison Project Phase 6 (CMIP6), using trend analysis, correlation coefficient and Root Mean Square Error (RMSE) as metrics. Our findings show the spatial distribution of SLC varies between −10.0 and 6.52 mm/yr, with an area-weighted global average of 1.29 ± 0.32 mm/yr. Five regions display rapid increasing rates exceeding twice the global average: E. and C. North-America, N. Central-America, W. C. Asia, and S. E. Asia. Together, these regions constitute 26% of the total analyzed area. The CMIP6 simulations, especially ESMs, have a systematic underestimation of SLC, compared with TGs. We found poor agreement between CMIP6 simulations and TGs (weak correlation and larger RMSE) in subtropical North Atlantic regions and W. Central Asia. Our findings facilitate a multifactor hazard regional analysis that includes SLC alongside temperature, precipitation, and other parameters. It also identifies directions for future model development toward better detecting extremes and narrowing uncertainties in sea level simulations.</p>","PeriodicalId":54286,"journal":{"name":"Earth and Space Science","volume":"12 9","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025EA004402","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144997915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Abundant Non-Mare Components in the Chang'e-6 Lunar Regolith: Constraints From Plagioclase Fragments and Impact Glasses 嫦娥六号月球风化层中丰富的非母成分：来自斜长石碎片和撞击玻璃的约束

IF 4 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2025-09-05 DOI: 10.1029/2025JE008976

Zhiming Chen, Le Zhang, Jingyou Chen, Chngyuan Wang, Jintuan Wang, Zexian Cui, Zuyang Zou, Pengli He, Yonghua Cao, Qin Zhou, Linli Chen, Yan-Qiang Zhang, Yi-Gang Xu

{"title":"Abundant Non-Mare Components in the Chang'e-6 Lunar Regolith: Constraints From Plagioclase Fragments and Impact Glasses","authors":"Zhiming Chen, Le Zhang, Jingyou Chen, Chngyuan Wang, Jintuan Wang, Zexian Cui, Zuyang Zou, Pengli He, Yonghua Cao, Qin Zhou, Linli Chen, Yan-Qiang Zhang, Yi-Gang Xu","doi":"10.1029/2025JE008976","DOIUrl":"https://doi.org/10.1029/2025JE008976","url":null,"abstract":"<p>Lunar regolith contains not only materials derived from the local rock unit, but also materials transferred from remote craters, which are crucial for investigating the lithological diversity of the lunar surface. In this study, we conducted detailed petrography and geochemical analyses and measured the cross-sectional area of plagioclase fragments and impact glass particles selected from the Chang'e 6 (CE-6) regolith, the first lunar far-side returned sample. Statistics of plagioclase fragments and impact glass are used to estimate the proportion of the diverse components in the CE-6 regolith. The results reveal 35.7 vol% and 28.2 vol% exotic components in CE-6 plagioclase and impact glass fractions, respectively. As plagioclase, pyroxene and glass particles are the three dominant phases (>95 vol%) in the CE-6 regolith, together with previously reported pyroxene compositions, we estimate that the abundance of the exotic materials is 23.5–33.5 vol%. These exogeneous components include very-low-Ti (VLT) basalt (2%–3%), ferroan anorthosite (5%–9%), Mg-suite (15%–20%), KREEP-related (∼0.1%), and highlands-mare-mixed materials (∼1%). The VLT-basalt component is most likely from the mare basalt unit to the east of the landing site or beneath the local mare layer. Based on the ejecta orientations and model age of impact craters, ferroan anorthite, Mg-suite and KREEP-related materials are likely transferred from Vavilov/Pythagoras (highland anorthosite), Chaffee S/White’ (rich in mafic minerals), and Birkeland (high Th contents) craters, respectively. The abundant non-mare components in the CE-6 regolith contrast to the very scarce exotic materials in the CE-5 lunar regolith, potentially providing valuable insights into the composition of the lunar far-side.</p>","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":"130 9","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998616","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

Asymmetry of Cyclonic Sea Surface Wind and Wave Observed by SAR 由SAR观测到的气旋性海面风波的不对称性

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-09-05 DOI: 10.1029/2025GL116600

Weizeng Shao, Yuyi Hu, Qingping Zou, Maurizio Migliaccio, Xingwei Jiang

{"title":"Asymmetry of Cyclonic Sea Surface Wind and Wave Observed by SAR","authors":"Weizeng Shao, Yuyi Hu, Qingping Zou, Maurizio Migliaccio, Xingwei Jiang","doi":"10.1029/2025GL116600","DOIUrl":"https://doi.org/10.1029/2025GL116600","url":null,"abstract":"<p>CyclObs-derived wind and SWH field are extracted from over 600 dual-polarized Sentinel-1 (S-1) images of around 300 tropical cyclones (TCs) over the past eight years to investigate asymmetry of wind and wave fields during TCs. Fetch analysis and machine learning technique, eXtreme Gradient Boosting (XGBoost), is used to establish a relationship between TC wind speed and significant wave height (SWH). It was found that TC wind and SWH radii become asymmetric as sea states intensify. Notably, wind radii correlations (CORs) increase on the left-right and left-back quadrants for wind speeds larger than 20 m/s, while SWH radii exhibit the opposite trend. XGBoost is employed to obtain the improved relationship between wind fetch and SWH (COR < 0.17). Validation against buoys and Haiyang-2 (HY-2) observations of 20 TCs indicates that the root mean squared error in SWH predictions is reduced by up to 1.1 m using XGBoost instead of empirical model. The new TC wave model by XGBoost is particularly robust under high-wind conditions, therefore vital for warning and mitigation of extreme storms and improved parameterizations of air-sea interaction.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 17","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL116600","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998896","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

Distinct Global Distribution of Electrostatic Electron Cyclotron Harmonic Waves in Earth's Magnetosphere Revealed by Multi-Satellite Observations 多卫星观测揭示的地球磁层静电电子回旋谐波的独特全球分布

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-09-05 DOI: 10.1029/2025GL117276

Yuequn Lou, Binbin Ni, Xing Cao, Qianli Ma, Yoshizumi Miyoshi, Dedong Wang, Shuqin Chen, Jiaming Li, Xudong Gu, Xin Ma, Qi Zhu, Yoshiya Kasahara, Shoya Matsuda, Atsuki Shinbori, Ayako Matsuoka, Mariko Teramoto, Kazuhiro Yamamoto, Iku Shinohara

{"title":"Distinct Global Distribution of Electrostatic Electron Cyclotron Harmonic Waves in Earth's Magnetosphere Revealed by Multi-Satellite Observations","authors":"Yuequn Lou, Binbin Ni, Xing Cao, Qianli Ma, Yoshizumi Miyoshi, Dedong Wang, Shuqin Chen, Jiaming Li, Xudong Gu, Xin Ma, Qi Zhu, Yoshiya Kasahara, Shoya Matsuda, Atsuki Shinbori, Ayako Matsuoka, Mariko Teramoto, Kazuhiro Yamamoto, Iku Shinohara","doi":"10.1029/2025GL117276","DOIUrl":"https://doi.org/10.1029/2025GL117276","url":null,"abstract":"<p>Electrostatic electron cyclotron harmonic (ECH) waves have been analyzed using different satellite data. However, single-mission studies prevent a systematic understanding of the emissions in Earth's magnetosphere. We perform a comprehensive survey of ECH waves using observations from Van Allen Probes, Arase, and MMS satellites spanning over 2012–2023. Our results indicate that these waves cover a broad spatial region of <i>L</i> = 3–15, |MLAT| < ∼40°, and nearly all magnetic local time sectors, showing a pronounced regional dependence. In the inner magnetosphere (<i>L</i> < ∼6), ECH wave power peaks in the premidnight-to-noon sectors, while the waves in outer regions (<i>L</i> > 6) exhibit dayside-maximized occurrence rates. Wave amplitudes are strongest on the nightside but display a secondary pre-noon peak at <i>L</i> > 8. In addition, ECH waves are predominantly confined near the equator (|MLAT| < 5°) at <i>L</i> < ∼8, in contrast to the much broader latitudinal distribution (|MLAT| < 35°) at higher <i>L</i>.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 17","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL117276","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998897","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

U–Pb zircon geochronology and geochemistry of Um Genud layered mafic intrusion in the northern tip of the Arabian-nubian shield: implications for the genesis of the plutonic crust of neoproterozoic immature intra-oceanic arc 阿拉伯-努比亚盾北端Um Genud层状基性侵入体的U-Pb锆石年代学和地球化学：对新元古代未成熟洋内弧深部地壳成因的启示

IF 3.2 2区地球科学

Precambrian Research Pub Date : 2025-09-05 DOI: 10.1016/j.precamres.2025.107915

Tarek H. Abu El-Kheir , Keda Cai , Ayman E. Maurice , Kai Wang , Hairuo Wang , Maher Dawoud

{"title":"U–Pb zircon geochronology and geochemistry of Um Genud layered mafic intrusion in the northern tip of the Arabian-nubian shield: implications for the genesis of the plutonic crust of neoproterozoic immature intra-oceanic arc","authors":"Tarek H. Abu El-Kheir , Keda Cai , Ayman E. Maurice , Kai Wang , Hairuo Wang , Maher Dawoud","doi":"10.1016/j.precamres.2025.107915","DOIUrl":"10.1016/j.precamres.2025.107915","url":null,"abstract":"<div><div>The Um Genud Neoproterozoic layered mafic intrusion, located in the South Eastern Desert of Egypt, represents the northwestern tip of the juvenile crust of the Arabian-Nubian Shield (ANS). This intrusion is composed of olivine gabbro, gabbro, noritic-gabbro and hornblende gabbro. Zircon U–Pb data constrain the emplacement age of the intrusion to 718 Ma, coinciding with the island arc stages of the ANS. The trace element patterns of pyroxenes, amphiboles, whole-rock samples and calculated melts in equilibrium with clinopyroxene and amphibole show marked Nb-Ta and Zr-Hf troughs and prominent peak of Pb. These features, along with the trace element abundances and ratios in zircon, suggest that the parental magma was generated in an intra-oceanic island arc setting from a depleted mantle source metasomatized by subducted slab-derived aqueous fluids. Textural features, mineral compositions of olivine, pyroxene and plagioclase, whole-rock geochemical characteristics, the calculated ƒO<sub>2</sub> values (FMQ + 1 – FMQ + 1.6), and the estimated water content (5.9 – 9.1 wt%) of melt indicate that the Um Genud gabbroic rocks represent cumulates differentiated from oxidized hydrous low-K tholeiitic magma, essentially by fractional crystallization. The estimated pressure of crystallization (∼3 to ∼ 3.5 kbar; ∼10 km depth), the low-K tholeiitic nature of parental magma and the relative abundance of the exposed gabbroic and granitic arc rocks in the study area are consistent with intrusion emplacement within the lower crust of an immature oceanic arc. This implies that even arcs with thin crust can develop considerable plutonic layers and contribute to continental crust growth through vertical accretion.</div></div>","PeriodicalId":49674,"journal":{"name":"Precambrian Research","volume":"429 ","pages":"Article 107915"},"PeriodicalIF":3.2,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144997686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

The Effect of Near-Surface Winds on Surface Temperature and Dust Transport on Venus 近地面风对金星表面温度和尘埃输送的影响

IF 4 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2025-09-05 DOI: 10.1029/2025JE009133

Maxence Lefèvre, Sébastien Lebonnois, Aymeric Spiga, François Forget

{"title":"The Effect of Near-Surface Winds on Surface Temperature and Dust Transport on Venus","authors":"Maxence Lefèvre, Sébastien Lebonnois, Aymeric Spiga, François Forget","doi":"10.1029/2025JE009133","DOIUrl":"https://doi.org/10.1029/2025JE009133","url":null,"abstract":"<p>The knowledge of the Venus near-surface atmosphere is sparse. Few spacecrafts landed on the surface and measured winds with amplitudes below 1 m/s. The diurnal cycle of the wind amplitude and orientation is not known. Recent numerical simulations showed that slope winds along topographic structures could strongly impact the direction of winds. This study presents the first mesoscale modeling of such winds on Venus. A change of direction is occurring during the day in the main slopes, with upslope winds at noon due to solar heating and downslope winds at night. This is due to efficient IR cooling of the surface during the night, being colder than its surroundings slope atmospheric environment and leading to displacement of air. The temperature is impacted by the adiabatic cooling/warming induced by those winds. A strong heating effect is occurring for the downslope winds, leading to an anti-correlation between the surface temperature diurnal amplitude and the topography. This diurnal amplitude reaches 4 K in the plains and below 1 K in the mountains. The saltation of sediment by those winds was also quantified, with a higher probability at night along the slopes on the western flanks.</p>","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":"130 9","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025JE009133","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998635","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

地球科学最新文献