AGU Advances最新文献_第3页

Slow True Polar Wander Around Varying Equatorial Axes Since 320 Ma 自320毫安以来，在不同的赤道轴周围缓慢的真极漫游

IF 8.3

AGU Advances Pub Date : 2025-04-12 DOI: 10.1029/2024AV001515

Bram Vaes, Douwe J. J. van Hinsbergen

{"title":"Slow True Polar Wander Around Varying Equatorial Axes Since 320 Ma","authors":"Bram Vaes, Douwe J. J. van Hinsbergen","doi":"10.1029/2024AV001515","DOIUrl":"https://doi.org/10.1029/2024AV001515","url":null,"abstract":"True polar wander (TPW), the rotation of the solid Earth relative to the spin axis, is driven by changes in the Earth's moment of inertia induced by mantle convection and may have influenced past climate and life. Long-term TPW is typically inferred from large polar shifts in paleomagnetic apparent polar wander paths or computed directly by rotating them in a mantle reference frame. However, most apparent polar wander paths do not incorporate uncertainties in paleomagnetic data, which may bias estimates of TPW. Here, we provide new quantitative estimates of TPW since 320 Ma by placing a recent global apparent polar wander path corrected for age bias and with improved uncertainty quantification in existing mantle reference frames. We find large amplitude (>10°) but slow TPW rotations that predominantly occurred about two equatorial axes that are approximately orthogonal. During the Triassic and Jurassic, a ∼24° TPW oscillation occurred about an axis at ∼15°W, close to the present-day TPW axis at ∼10°E. In contrast, the TPW axis was located at ∼85°E during a smaller oscillation (∼6–10°) over the past ∼80 Ma, as well as between 260 and 320 Ma. We propose that these varying TPW axes reflect changes in the distribution and flux of subduction in the Tethyan and Pacific realms. We find no evidence for previously postulated fast (>1°/Ma) TPW oscillations in the Cretaceous and Late Jurassic. Finally, we propose that calibrating mantle convection models against reconstructed TPW will improve our understanding of mantle dynamics and the drivers of TPW itself.","PeriodicalId":100067,"journal":{"name":"AGU Advances","volume":"6 2","pages":""},"PeriodicalIF":8.3,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024AV001515","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Weak Crust Owing Past Magmatic Intrusions Beneath Campi Flegrei Identified: The Engine for Bradyseismic Movements? 发现坎皮弗莱格雷（Campi Flegrei）地下岩浆侵入造成的薄壳：布雷迪地震运动的引擎？

IF 8.3

AGU Advances Pub Date : 2025-04-05 DOI: 10.1029/2024AV001611

Gianmarco Buono, Francesco Maccaferri, Lucia Pappalardo, Anna Tramelli, Stefano Caliro, Giovanni Chiodini, Virginie Pinel, Eleonora Rivalta, Elena Spagnuolo, Elisa Trasatti, Mauro Antonio Di Vito

{"title":"Weak Crust Owing Past Magmatic Intrusions Beneath Campi Flegrei Identified: The Engine for Bradyseismic Movements?","authors":"Gianmarco Buono, Francesco Maccaferri, Lucia Pappalardo, Anna Tramelli, Stefano Caliro, Giovanni Chiodini, Virginie Pinel, Eleonora Rivalta, Elena Spagnuolo, Elisa Trasatti, Mauro Antonio Di Vito","doi":"10.1029/2024AV001611","DOIUrl":"https://doi.org/10.1029/2024AV001611","url":null,"abstract":"Calderas often experience extended periods of unrest that are challenging to relate to a magmatic or hydrothermal origin, making it crucial to assemble a clear picture of these dynamics. Since 2005, Campi Flegrei caldera (Italy) has experienced accelerating ground uplift, seismicity rates, and degassing. Here we conduct petrological and 4D X-ray microtomography investigations on cored rocks from a ∼3 km deep geothermal well located near the center of caldera, complemented by 3D high-resolution seismic tomography. At a depth of ∼2.5–3.0 km we identify the transition to a weak tuff layer likely to trap magmatic fluids. Simulations of magma pathways indicate that stresses generated by caldera unloading may have arrested at the limestone/tuff transition past ascending dykes, which deformed, heated, and released magmatic fluids, deteriorating the surrounding rocks. This weak layer may play a crucial role in building up overpressure, causing deformation and seismicity, thus influencing the dynamics of recent unrests, and possible future magma ascent episodes.","PeriodicalId":100067,"journal":{"name":"AGU Advances","volume":"6 2","pages":""},"PeriodicalIF":8.3,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024AV001611","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Water Vapor Spectroscopy and Thermodynamics Constrain Earth's Tropopause Temperature 水蒸气光谱和热力学约束地球对流层顶温度

IF 8.3

AGU Advances Pub Date : 2025-04-05 DOI: 10.1029/2024AV001206

Brett A. McKim, Nadir Jeevanjee, Geoffrey K. Vallis, Neil T. Lewis

{"title":"Water Vapor Spectroscopy and Thermodynamics Constrain Earth's Tropopause Temperature","authors":"Brett A. McKim, Nadir Jeevanjee, Geoffrey K. Vallis, Neil T. Lewis","doi":"10.1029/2024AV001206","DOIUrl":"https://doi.org/10.1029/2024AV001206","url":null,"abstract":"As Earth warms, the tropopause is expected to rise, but predictions of its temperature change are less certain. Longstanding theories employing “gray” radiation tie the tropopause temperature to outgoing longwave radiation (OLR), but this is in contrast to recent work in which simulations exhibit a Fixed Tropopause Temperature (FiTT) even as OLR increases. The FiTT is thought to result from the interaction between upper tropospheric moisture and radiation, but a predictive theory for FiTT has not yet been formulated. Here, we build on a recent explanation for the temperature of anvil clouds and argue that tropopause temperature, defined by where radiative cooling becomes negligible, is set by water vapor's maximum spectroscopic absorption and Clausius-Clapeyron scaling. This “thermospectric constraint” makes quantitative predictions for tropopause temperature that are borne out in single column and general circulation model experiments where the spectroscopy is modified and both the radiative and lapse-rate tropopause change in response. This constraint provides a theoretical foundation for the FiTT hypothesis and a more refined explanation for why the tropopause rises with surface warming, shows how tropopause temperature can decouple from OLR, suggests a way to relate the temperatures of anvil clouds and the tropopause, and shows how spectroscopy manifests in Earth's general circulation.","PeriodicalId":100067,"journal":{"name":"AGU Advances","volume":"6 2","pages":""},"PeriodicalIF":8.3,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024AV001206","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Were Gravity Waves or Lamb Waves Responsible for the Large-Scale Thermospheric Response to the Tonga Eruption? 是重力波还是兰姆波导致了汤加火山喷发的大规模热层反应？

IF 8.3

AGU Advances Pub Date : 2025-04-03 DOI: 10.1029/2024AV001470

Ruoxi Li, Jiuhou Lei, Shun-Rong Zhang, Feifan Liu, Xuetao Chen, Xiaoli Luan, Xing Meng

引用次数: 0

Enhanced Weathering May Benefit From Co-Application With Organic Amendments 与有机改进剂共同应用可增强风化作用

IF 8.3

AGU Advances Pub Date : 2025-04-01 DOI: 10.1029/2025AV001693

Maya Almaraz

{"title":"Enhanced Weathering May Benefit From Co-Application With Organic Amendments","authors":"Maya Almaraz","doi":"10.1029/2025AV001693","DOIUrl":"https://doi.org/10.1029/2025AV001693","url":null,"abstract":"Enhanced weathering has emerged as a promising natural climate solution that has the potential to remove billions of tons of carbon from the atmosphere if widely adopted in agricultural settings. Despite this potential, few field trials have been published that verify the carbon dioxide removal (CDR) potential of enhanced weathering in croplands and, until now, none had been published in grazing lands. Anthony et al. (2025, https://doi.org/10.1029/2024AV001480) conducted the first trial of enhanced weathering in a California rangeland and showed weathering of ground silicate rocks despite drought conditions in an already dry climate. Co-application of inorganic (silicate rocks) with organic (biochar and compost) amendments revealed not just additive, but synergistic effects whereby organic amendments increased rates of weathering. This is important because field CDR rates were <10% of the theoretical maximum (i.e., the rate if basalt was completely weathered); thus, methods to improve weathering rates will be necessary for this practice to scale in a meaningful way. Multi-carbon pool measurements revealed not only how co-application of soil amendments heightened net carbon benefits, but also how soil amendments complemented each other to produce net benefits for soil carbon, biomass growth, and greenhouse gas emission reductions. Anthony et al. (2025, https://doi.org/10.1029/2024AV001480) produce new insights toward our understanding of enhanced weathering as well as introduce paths for future research concerning combined amendment applications, synergistic mechanisms for carbon storage, and deployment in various agricultural contexts. While questions remain about the fate of weathering products in arid regions, Anthony et al. (2025, https://doi.org/10.1029/2024AV001480) present novel findings on the potential for significant weathering to occur even under suboptimal conditions.","PeriodicalId":100067,"journal":{"name":"AGU Advances","volume":"6 2","pages":""},"PeriodicalIF":8.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025AV001693","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143741376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Speed Electron Flows in the Earth Magnetotail 地球磁尾中的高速电子流

IF 8.3

AGU Advances Pub Date : 2025-04-01 DOI: 10.1029/2024AV001549

Huijie Liu, Wenya Li, Binbin Tang, Cecilia Norgren, Kaijun Liu, Yuri V. Khotyaintsev, Daniel Graham, Tongkuai Li, Chongle Zhang, Andris Vaivads, Shan Wang, Jiansen He, Xiaocheng Guo, James L. Burch, Per-Arne Lindqvist, Robert Ergun, Daniel Gershman, Benoit Lavraud, Christopher Russell, Quanming Lu, Chi Wang

{"title":"High-Speed Electron Flows in the Earth Magnetotail","authors":"Huijie Liu, Wenya Li, Binbin Tang, Cecilia Norgren, Kaijun Liu, Yuri V. Khotyaintsev, Daniel Graham, Tongkuai Li, Chongle Zhang, Andris Vaivads, Shan Wang, Jiansen He, Xiaocheng Guo, James L. Burch, Per-Arne Lindqvist, Robert Ergun, Daniel Gershman, Benoit Lavraud, Christopher Russell, Quanming Lu, Chi Wang","doi":"10.1029/2024AV001549","DOIUrl":"https://doi.org/10.1029/2024AV001549","url":null,"abstract":"High-speed electron flows (HSEFs) play a crucial role in the energy dissipation and conversion processes within the terrestrial magnetosphere and can drive various types of plasma waves and instabilities, affecting the electron-scale dynamics. The existence, spatial distribution, and general properties of HSEFs in the Earth magnetotail are still unknown. In this study, we conduct a comprehensive survey of HSEFs in the Earth magnetotail, utilizing NASA's Magnetospheric Multiscale (MMS) mission observations from 2017 to 2021. A total of 642 events characterized by electron bulk speeds exceeding 5,000 km/s are identified. The main statistical properties are: (a) The duration of almost all HSEFs are less than 4 s, and the average duration is 0.74 s. (b) HSEFs exhibit a strong dawn-dusk (30%–70%) asymmetry. (c) 39.6%, 29.0%, and 31.4% of the events are located in the plasma sheet, plasma sheet boundary layer (PSBL), and lobe region, respectively. (d) In the plasma sheet, HSEFs have arbitrary moving directions regarding the ambient magnetic field, and the events near the neutral line predominantly move along the same direction as the ion outflows, indicating outflow electrons generated by magnetic reconnection. (e) HSEFs in the PSBL and lobe mainly move along the ambient magnetic field, and 70% of HSEFs in the PSBL exhibit features of reconnection inflow. The HSEFs in lobe regions may locate near the reconnection electron edges. Our study reveals that the HSEFs in magnetotail are closely associated with magnetic reconnection, and the statistical results deepen the understanding of HSEF fundamental properties in collisionless plasma.","PeriodicalId":100067,"journal":{"name":"AGU Advances","volume":"6 2","pages":""},"PeriodicalIF":8.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024AV001549","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143741061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bridging Information From Paleo-Hydrological and Climate Model Ensembles to Assess Long Term Hydrological Drought Hazard 从古水文和气候模型集合的桥接信息来评估长期水文干旱灾害

IF 8.3

AGU Advances Pub Date : 2025-04-01 DOI: 10.1029/2024AV001393

Rui Guo, Hung T. T. Nguyen, Stefano Galelli, Serena Ceola, Alberto Montanari

{"title":"Bridging Information From Paleo-Hydrological and Climate Model Ensembles to Assess Long Term Hydrological Drought Hazard","authors":"Rui Guo, Hung T. T. Nguyen, Stefano Galelli, Serena Ceola, Alberto Montanari","doi":"10.1029/2024AV001393","DOIUrl":"https://doi.org/10.1029/2024AV001393","url":null,"abstract":"Characterizing the evolution of drought frequency and severity under anthropogenic global warming remains a key challenge because of the mismatch between the length of instrumental records and the long-term variability of drought features. To address this gap, we propose a modeling framework that combines river flow observations, paleo-hydrological reconstructions, and climate model simulations. Such diversity of climate information, that is bridged in a flexible approach, allows evaluating the hazard of hydrological droughts for any large catchment globally. By focusing on the specific case of Alpine regions and analyzing the information contained in an ensemble for the period 1100–2100, we show that, compared to the past nine centuries, the mean annual flow in the Po River (Italy's main water course) may decrease by about 10% during the 21st century, while the mean drought duration and severity are likely to increase by approximately 11% and 12%, respectively. Future drought conditions are likely to match, or even exceed, the driest period of the Medieval Climate Anomaly under different emissions scenarios. This indicates unprecedented drought conditions in Alpine regions in the coming decades, thus calling for an increased preparedness in managing water resources under climate change.","PeriodicalId":100067,"journal":{"name":"AGU Advances","volume":"6 2","pages":""},"PeriodicalIF":8.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024AV001393","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143741377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Commitment to Advance Excellence and Inclusion in the Earth and Space Sciences Scholarly Publications 致力于促进地球和空间科学学术出版物的卓越性和包容性

IF 8.3

AGU Advances Pub Date : 2025-03-26 DOI: 10.1029/2025AV001726

Marguerite A. Xenopoulos, Lisa Beal, Graziella Caprarelli, Kelly Caylor, Georgia Destouni, Qingyun Duan, Steven A. Hauck, II, Matthew Huber, Kristopher B. Karnauskas, Kate Lajtha, Noé Lugaz, Alberto Montanari, Helen Nguyen, Julia K. Parrish, Ann Rowan, Isaac R. Santos, Alexandre Schubnel, Michael Wysession

{"title":"Commitment to Advance Excellence and Inclusion in the Earth and Space Sciences Scholarly Publications","authors":"Marguerite A. Xenopoulos, Lisa Beal, Graziella Caprarelli, Kelly Caylor, Georgia Destouni, Qingyun Duan, Steven A. Hauck, II, Matthew Huber, Kristopher B. Karnauskas, Kate Lajtha, Noé Lugaz, Alberto Montanari, Helen Nguyen, Julia K. Parrish, Ann Rowan, Isaac R. Santos, Alexandre Schubnel, Michael Wysession","doi":"10.1029/2025AV001726","DOIUrl":"https://doi.org/10.1029/2025AV001726","url":null,"abstract":"Addressing global challenges and advancing knowledge in the Earth and space sciences requires an equitable, diverse, and inclusive scholarly community where researchers must be freely able to conduct, collaborate on, share, review, and discuss their research on important economic and societal topics such as climate change. The current Executive Orders in the United States focus on censoring research and researchers by banning specific words, removing access to data sets, or by restricting what type of research can be funded or published, therefore compromising the knowledge that researchers are able to produce. As Editors-in-Chief of AGU publications we stand by our mission to support the publication of evidence-based, rigorously vetted research without political pressure. Collectively, our peer-reviewed journals and books provide inclusive publication outlets for the global research community to advance Earth and space sciences and to strengthen the public's trust in scientific evidence.","PeriodicalId":100067,"journal":{"name":"AGU Advances","volume":"6 2","pages":""},"PeriodicalIF":8.3,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025AV001726","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143699008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Megapluvials in Southwestern North America 北美西南部的巨型雨虫

IF 8.3

AGU Advances Pub Date : 2025-03-25 DOI: 10.1029/2024AV001508

Benjamin I. Cook, A. Park Williams, Jason E. Smerdon, Kate Marvel, Richard Seager

{"title":"Megapluvials in Southwestern North America","authors":"Benjamin I. Cook, A. Park Williams, Jason E. Smerdon, Kate Marvel, Richard Seager","doi":"10.1029/2024AV001508","DOIUrl":"https://doi.org/10.1029/2024AV001508","url":null,"abstract":"Droughts over the last century in Southwestern North America (SWNA) have had severe consequences for people and ecosystems across the region, most recently during the early 21st-century megadrought (2000–2022). The 20th century, however, was bracketed by two extended pluvials that also had significant impacts in the region. We use a 1,224 years (800–2023 CE) record of observed and reconstructed soil moisture, in concert with a paleoclimate reanalysis product, to place the 20th-century pluvials in a longer-term context and investigate the occurrence and dynamics of similar events in the Common Era. Analyses of the soil moisture reconstruction demonstrate that pluvials and megapluvials are as ubiquitous as droughts and megadroughts over the last millennium. The early (19 years; 1905–1923) and late (22 years; 1978–1999) 20th-century pluvials rank as the second and first wettest in the record, respectively, positioning these as events on par with the most extreme megadroughts. Pluvials show a strong association with tropical Pacific (warm) sea surface temperatures (SSTs) during the 20th century and over the prior millennium, though the role of the tropical Atlantic is much more uncertain and ambiguous. Using a Bayesian hierarchical modeling approach trained on the pre-industrial period (800–1849 CE), we find that the record setting late 20th-century megapluvial likely occurred as a consequence of anomalously strong Pacific sea surface temperature forcing. This work establishes pluvial and megapluvial events as intrinsic components of Common Era hydroclimate variability in SWNA, comparable in importance to droughts and megadroughts.","PeriodicalId":100067,"journal":{"name":"AGU Advances","volume":"6 2","pages":""},"PeriodicalIF":8.3,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024AV001508","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143690040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Variations in Hawaiian Plume Flux Controlled by Ancient Mantle Depletion 古地幔耗竭控制下夏威夷羽流的变化

IF 8.3

AGU Advances Pub Date : 2025-03-14 DOI: 10.1029/2024AV001434

Paul Béguelin, Andreas Stracke, Maxim D. Ballmer, Shichun Huang, Michael Willig, Michael Bizimis

{"title":"Variations in Hawaiian Plume Flux Controlled by Ancient Mantle Depletion","authors":"Paul Béguelin, Andreas Stracke, Maxim D. Ballmer, Shichun Huang, Michael Willig, Michael Bizimis","doi":"10.1029/2024AV001434","DOIUrl":"https://doi.org/10.1029/2024AV001434","url":null,"abstract":"Mantle plumes—upwellings of buoyant rock in Earth's mantle—feed hotspot volcanoes such as Hawai‘i. The size of volcanoes along the Hawai‘i–Emperor chain, and thus the magma flux of the Hawaiian plume, has varied over the past 85 million years. Fifteen and two million years ago, rapid bursts in magmatic production led to the emergence of large islands such as Pūhāhonu, Maui Nui and Hawai‘i, but the underlying mechanisms remain enigmatic. Here, we use new radiogenic Ce–Sr–Nd–Hf isotope data of Hawaiian shield lavas to quantify the composition and proportion of the different constituents of the Hawaiian plume over time. We find that most of the Hawaiian mantle source is peridotite that has experienced variable degrees of melt depletion before being incorporated into the plume. We show that the most isotopically enriched LOA-type compositions arise from the aggregation of melts from more depleted, trace element-starved peridotite, causing the over-visibility of melts from recycled crust in the mixture. Our results also show that upwelling of chemically more depleted, and thus less dense, more buoyant mantle peridotite occurred synchronously to an observed burst of magma production. Buoyancy variations induced by variably depleted peridotite may not only control the temporal patterns of volcanic productivity in Hawai‘i, but also those of other plumes world-wide. The excess buoyancy of depleted peridotite may therefore be an underrated driving force for convective mantle flow, trigger and sustain active upwelling of relatively cool plumes, and control the geometry of mantle upwellings from variable depths.","PeriodicalId":100067,"journal":{"name":"AGU Advances","volume":"6 2","pages":""},"PeriodicalIF":8.3,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024AV001434","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0