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Impact of Penetrating Kelvin Waves on MJO Rainfall Propagation Through Deep Convection Modulation 穿透开尔文波对深对流调制MJO降雨传播的影响
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-05-25 DOI: 10.1029/2025GL116549
Xingchao Chen, L. Ruby Leung, Zhe Feng
{"title":"Impact of Penetrating Kelvin Waves on MJO Rainfall Propagation Through Deep Convection Modulation","authors":"Xingchao Chen,&nbsp;L. Ruby Leung,&nbsp;Zhe Feng","doi":"10.1029/2025GL116549","DOIUrl":"https://doi.org/10.1029/2025GL116549","url":null,"abstract":"<p>The Madden-Julian Oscillation (MJO) is a dominant intraseasonal oscillation in the tropics. As MJOs propagate over the Indian Ocean, some of them can be penetrated by fast-moving equatorial Kelvin waves originating to the west of the MJOs. Through a series of sensitivity experiments, we demonstrate that these penetrating Kelvin waves can modulate the eastward propagation speed of MJO rainfall. Deep convection in the western MJO rainfall envelope initiates more frequently and produces greater lifetime rainfall when a convectively active Kelvin phase is present, while the opposite occurs during a convectively suppressed Kelvin phase. This alteration in deep convection activity can lead to notable changes in the propagation of the large-scale MJO rainfall envelope. The modulation of deep convection lifetime rainfall by penetrating Kelvin waves primarily occurs through their impact on deep convection rainfall area, which is closely related to the variations in lower-tropospheric moisture induced by the Kelvin waves.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 10","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL116549","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135776","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
Marine Magnetic Anomalies Enhanced by Internal Stress in Rapidly Cooled Submarine Basalts 快速冷却海底玄武岩内应力增强的海洋磁异常
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-05-24 DOI: 10.1029/2025GL115045
Fei Han, Huapei Wang, Yiliang Lv, Greig A. Paterson, Andrew J. Biggin, Wyn Williams, Tao Yang, Junxiang Miao, Ting Cao, Duowen Zhu, Chen Wen, Shaochen Hu, Xiaowei Chen, Mengqing Wang, Yiming Ma, Jiakun Fang, Jiabo Liu
{"title":"Marine Magnetic Anomalies Enhanced by Internal Stress in Rapidly Cooled Submarine Basalts","authors":"Fei Han,&nbsp;Huapei Wang,&nbsp;Yiliang Lv,&nbsp;Greig A. Paterson,&nbsp;Andrew J. Biggin,&nbsp;Wyn Williams,&nbsp;Tao Yang,&nbsp;Junxiang Miao,&nbsp;Ting Cao,&nbsp;Duowen Zhu,&nbsp;Chen Wen,&nbsp;Shaochen Hu,&nbsp;Xiaowei Chen,&nbsp;Mengqing Wang,&nbsp;Yiming Ma,&nbsp;Jiakun Fang,&nbsp;Jiabo Liu","doi":"10.1029/2025GL115045","DOIUrl":"10.1029/2025GL115045","url":null,"abstract":"<p>Marine magnetic anomalies are pivotal to our understanding of plate tectonics, geomagnetic fields, and deep Earth dynamics. However, the question of how Ti-rich titanomagnetites, the primary remanence carriers in oceanic crust rocks, can faithfully preserve geomagnetic field information for tens of millions of years is not well understood. Here, we combine microscopic, micromagnetic, and rock magnetic analyses, including 14-T high-field measurements, to show that the magnetic micro-anisotropy of a fresh pillow lava dredged from the Juan de Fuca Ridge is dominated by internal stress throughout its chilled margin to its interior. Internal stress, which is generated primarily by the contraction of hot lava erupting into cold seawater, increased the natural remanent magnetization in this lava by a factor of ∼3. We suggest that stress-induced magnetic domain state transformation from multidomain to single vortex (or single domain) in extrusive pillow lavas significantly enhances oceanic crustal magnetic remanence strength and stability.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 10","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL115045","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144130663","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
Contrasting Mechanisms Controlling Pb Isotopes of Dust in Inland and Marine Archives 内陆和海洋档案中粉尘铅同位素控制机制对比
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-05-24 DOI: 10.1029/2024GL114133
Ruxi Dou, Jianjun Zou, Xuefa Shi, Zhi Dong, Yonghua Wu, Aimei Zhu, Xuguang Feng, Xinqing Zou, Sergey Gorbarenko, Yuriy Vasilenko, Aleksandr Bosin
{"title":"Contrasting Mechanisms Controlling Pb Isotopes of Dust in Inland and Marine Archives","authors":"Ruxi Dou,&nbsp;Jianjun Zou,&nbsp;Xuefa Shi,&nbsp;Zhi Dong,&nbsp;Yonghua Wu,&nbsp;Aimei Zhu,&nbsp;Xuguang Feng,&nbsp;Xinqing Zou,&nbsp;Sergey Gorbarenko,&nbsp;Yuriy Vasilenko,&nbsp;Aleksandr Bosin","doi":"10.1029/2024GL114133","DOIUrl":"10.1029/2024GL114133","url":null,"abstract":"<p>Lead (Pb) isotopes are powerful tools for tracing dust provenance and reconstructing paleoclimate. However, variations in Pb isotopic compositions among different grain-size fractions in sediments complicate their use. We examine the Nd-Pb isotopic compositions of two sediment fractions (&lt;2 μm and 30–63 μm) from the central Japan Sea during the last glaciation (26–12 ka BP). Our results indicate that these sediments primarily consist of aeolian dust transported by the East Asian Winter Monsoon. The &lt;2 μm fraction exhibits more radiogenic Pb isotopes than the 30–63 μm fraction. This size-dependent discrepancy in Pb isotopes is attributed to differences in sediment composition, governed by the incongruent weathering of minerals in source rocks and transport sorting. Comparisons of dust records from inland and marine archives reveal contrasting mechanisms that control Pb isotopic compositions. We propose that greater caution is necessary when using Pb isotopes in paleoclimatology and paleoceanography.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 10","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL114133","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144130666","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
Mechanisms Linking Stratospheric Gravity Wave Activity to Hurricane Intensification: Insights From Model Simulation of Hurricane Joaquin 将平流层重力波活动与飓风增强联系起来的机制：来自飓风华金模式模拟的见解
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-05-24 DOI: 10.1029/2024GL113531
X. Wu, L. Hoffmann, C. J. Wright, N. P. Hindley, M. J. Alexander, X. Wang, B. Chen, Y. Wang, M. Li
{"title":"Mechanisms Linking Stratospheric Gravity Wave Activity to Hurricane Intensification: Insights From Model Simulation of Hurricane Joaquin","authors":"X. Wu,&nbsp;L. Hoffmann,&nbsp;C. J. Wright,&nbsp;N. P. Hindley,&nbsp;M. J. Alexander,&nbsp;X. Wang,&nbsp;B. Chen,&nbsp;Y. Wang,&nbsp;M. Li","doi":"10.1029/2024GL113531","DOIUrl":"10.1029/2024GL113531","url":null,"abstract":"<p>Previous studies based on satellite observations and model simulations have revealed a significant correlation between intense stratospheric gravity wave (GW) activity and hurricane intensification. This research further investigated the underlying mechanism of this correlation by analyzing the properties and propagation characteristics of stratospheric GWs excited by Hurricane Joaquin based on a Weather Research and Forecasting model simulation. By employing the 3-D Stockwell wave analysis method, we found that GWs excited during hurricane intensification display relatively higher intrinsic frequencies, shorter horizontal wavelengths, and longer vertical wavelengths than during weakening. Analysis of these GWs' propagation using the GROGRAT ray-tracing model revealed that they can reach the middle stratosphere rapidly within 20 min. This quick propagation enabled the observation of intense stratospheric GWs before the hurricane reached its peak intensity, offering a potential indicator for hurricane intensification. These findings strengthened the basis for considering stratospheric GW activity as a proxy for hurricane intensification under specific conditions.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 10","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL113531","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144130665","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
Samudra: An AI Global Ocean Emulator for Climate Samudra：一个AI全球海洋气候模拟器
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-05-24 DOI: 10.1029/2024GL114318
Surya Dheeshjith, Adam Subel, Alistair Adcroft, Julius Busecke, Carlos Fernandez-Granda, Shubham Gupta, Laure Zanna
{"title":"Samudra: An AI Global Ocean Emulator for Climate","authors":"Surya Dheeshjith,&nbsp;Adam Subel,&nbsp;Alistair Adcroft,&nbsp;Julius Busecke,&nbsp;Carlos Fernandez-Granda,&nbsp;Shubham Gupta,&nbsp;Laure Zanna","doi":"10.1029/2024GL114318","DOIUrl":"10.1029/2024GL114318","url":null,"abstract":"<p>AI emulators for forecasting have emerged as powerful tools that can outperform conventional numerical predictions. The next frontier is to build emulators for long climate simulations with skill across a range of spatiotemporal scales, a particularly important goal for the ocean. Our work builds a skillful global emulator of the ocean component of a state-of-the-art climate model. We emulate key ocean variables, sea surface height, horizontal velocities, temperature, and salinity, across their full depth. We use a modified ConvNeXt UNet architecture trained on multi-depth levels of ocean data. We show that the ocean emulator—<i>Samudra</i>—which exhibits no drift relative to the truth, can reproduce the depth structure of ocean variables and their interannual variability. Samudra is stable for centuries and 150 times faster than the original ocean model. Samudra struggles to capture the correct magnitude of the forcing trends and simultaneously remain stable, requiring further work.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 10","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL114318","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144130667","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
Coastal Erosion as a Major Sediment Source in the Inner Gulf of Thailand: Implications for Carbon Dynamics in Tropical Coastal Ocean Systems 海岸侵蚀是泰国内湾的主要沉积物来源：对热带海岸海洋系统碳动力学的影响
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-05-24 DOI: 10.1029/2025GL115606
Bingbing Wei, Stephanie Kusch, Till J. J. Hanebuth, Limin Hu, Miao Fan, Guodong Jia, Gesine Mollenhauer, Moritz Holtappels
{"title":"Coastal Erosion as a Major Sediment Source in the Inner Gulf of Thailand: Implications for Carbon Dynamics in Tropical Coastal Ocean Systems","authors":"Bingbing Wei,&nbsp;Stephanie Kusch,&nbsp;Till J. J. Hanebuth,&nbsp;Limin Hu,&nbsp;Miao Fan,&nbsp;Guodong Jia,&nbsp;Gesine Mollenhauer,&nbsp;Moritz Holtappels","doi":"10.1029/2025GL115606","DOIUrl":"10.1029/2025GL115606","url":null,"abstract":"<p>Coastal erosion is an increasingly dominant sediment source in marginal seas, particularly in low-lying areas affected by deltaic subsidence and sediment deficits from upstream water management. However, its role in sediment and organic carbon (OC) dynamics remains to be estimated. Our analyses of the inner Gulf of Thailand (IGoT) revealed that riverine sediment fluxes decreased from 6.6 to 5.4 Mt/yr after 1975, while sediment accumulation within the IGoT increased from 20.8 to 29.5 Mt/yr. The observed trend indicates major sediment contributions from coastal erosion, particularly from mangrove deposits. This process destabilizes coastal ecosystems and accelerates OC decomposition, that is, a low burial efficiency (16.8 ± 5.5%) leads to CO<sub>2</sub> release. Extrapolating these findings globally, mangrove loss could release ∼175 Tg/yr CO<sub>2</sub>. As coastal erosion intensifies under sea-level rise and human land-use practices, preserving coastal ecosystems is critical for mitigating blue carbon loss and maintaining coastal stability and resilience.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 10","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL115606","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144130664","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
Glacial Methane Hydrate Dissociation in the South China Sea Margin During the Oligocene 渐新世南海边缘冰川甲烷水合物分离作用
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-05-23 DOI: 10.1029/2024GL114439
Fenghao Liu, Enqing Huang, Xiaobo Jin, Jun Tian
{"title":"Glacial Methane Hydrate Dissociation in the South China Sea Margin During the Oligocene","authors":"Fenghao Liu,&nbsp;Enqing Huang,&nbsp;Xiaobo Jin,&nbsp;Jun Tian","doi":"10.1029/2024GL114439","DOIUrl":"https://doi.org/10.1029/2024GL114439","url":null,"abstract":"<p>Methane hydrate dissociation along continental margins has been widely associated with global carbon cycle perturbations and climate changes. However, the relationship between hydrate dynamics, carbon cycle disturbances, and climate variations remains unclear. Here, we report eleven anomalously depleted carbon isotope excursions in benthic foraminifera, along with increased coccolith recrystallization, suggesting episodic methane release from the northern South China Sea during the Oligocene. These abnormal patterns were generally coupled with benthic oxygen isotope maxima, indicating that hydrate destabilization was triggered by ice sheet expansion and sea-level decline during the Antarctic glaciations. This contrasts with the majority of previous studies, which have typically linked methane-sourced carbon emissions to global warming throughout Earth's history.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 10","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL114439","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144118114","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
True Polar Wander Driven by Artificial Water Impoundment: 1835–2011 人工蓄水驱动的真极漂移：1835-2011
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-05-23 DOI: 10.1029/2025GL115468
N. Valencic, E. Speiser, E. Doi, E. T. Lee, B. Ford, A. Hatzius, D. Komaravalli, B. Erdmann, W. Hawley, J. X. Mitrovica
{"title":"True Polar Wander Driven by Artificial Water Impoundment: 1835–2011","authors":"N. Valencic,&nbsp;E. Speiser,&nbsp;E. Doi,&nbsp;E. T. Lee,&nbsp;B. Ford,&nbsp;A. Hatzius,&nbsp;D. Komaravalli,&nbsp;B. Erdmann,&nbsp;W. Hawley,&nbsp;J. X. Mitrovica","doi":"10.1029/2025GL115468","DOIUrl":"https://doi.org/10.1029/2025GL115468","url":null,"abstract":"<p>Artificial water impoundment contributed significantly to global mean sea level change during the 20th century and is included in recent studies of the budget of 20th century true polar wander (TPW). We adopt a recent global database of water impoundment that accounts for 72% of an integrated global volume estimate and compute the associated TPW path from 1835 to 2011 CE. We find a highly non-monotonic pole path, with an integrated path length of 113.4 cm, a net displacement of 20.5 cm in the direction 103.4°E from 1835 to 1954 CE and 57.1 cm in the direction −117.5°E from 1954 to 2011. Across the first half of the 20th century, the mean rate of TPW was 0.30 cm/yr, while in the second half of the century it was 0.95 cm/yr. Finally, we demonstrate that the 28% of the total global water impoundment missing in our database likely had a negligible impact on polar motion.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 10","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL115468","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144118109","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
Does the Dayside Equatorial Ionospheric Electric Field Respond to Isolated Substorms? 日侧赤道电离层电场对孤立亚暴有响应吗？
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-05-23 DOI: 10.1029/2025GL115227
M. Hayashi, A. Yoshikawa, S. Ohtani
{"title":"Does the Dayside Equatorial Ionospheric Electric Field Respond to Isolated Substorms?","authors":"M. Hayashi,&nbsp;A. Yoshikawa,&nbsp;S. Ohtani","doi":"10.1029/2025GL115227","DOIUrl":"https://doi.org/10.1029/2025GL115227","url":null,"abstract":"<p>Substorms are known to induce global magnetosphere-ionosphere coupling. However, the specific response of the dayside ionospheric electric field and its influence on the equatorial electrojet (EEJ) remain controversial. This study investigates the electromagnetic field response in the dayside equatorial region during isolated substorms using ground magnetic field data. Statistical analysis revealed that the H component decreased at equatorial and low-latitude stations during isolated substorms. These decreases were of similar magnitude on average, indicating that significant changes in the EEJ caused by penetrating electric fields were not observed. However, individual events showed slight positive and negative variations. These results suggest that substorm-associated electric fields can reach equatorial regions, but additional conditions determine the positive and negative variations. This finding provides new insights into the spatial extent of substorm-induced electric fields.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 10","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL115227","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144118110","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
Effects of Subduction Fluids and Fractional Crystallization on the Magnetic Minerals Formation in the Back-Arc Basin 俯冲流体和分晶对弧后盆地磁性矿物形成的影响
IF 4.6 1区 地球科学
Geophysical Research Letters Pub Date : 2025-05-23 DOI: 10.1029/2025GL115006
Jie Xu, Zhaoxia Jiang, Xia Zhang, Sangzhong Li, Xiyao Li, Long Chen, Haonan Song, Yuying Chen, Yuzhen Zhang, Zehua Guo, Kun Guo, Qingsong Liu
{"title":"Effects of Subduction Fluids and Fractional Crystallization on the Magnetic Minerals Formation in the Back-Arc Basin","authors":"Jie Xu,&nbsp;Zhaoxia Jiang,&nbsp;Xia Zhang,&nbsp;Sangzhong Li,&nbsp;Xiyao Li,&nbsp;Long Chen,&nbsp;Haonan Song,&nbsp;Yuying Chen,&nbsp;Yuzhen Zhang,&nbsp;Zehua Guo,&nbsp;Kun Guo,&nbsp;Qingsong Liu","doi":"10.1029/2025GL115006","DOIUrl":"https://doi.org/10.1029/2025GL115006","url":null,"abstract":"<p>(Titano)magnetite is the major magnetic carrier in igneous rocks, whether it can decode the influence of subduction fluids and fractional crystallization characteristics in back-arc basins is unclear. Here, we performed petrographic and magnetic analyses on volcanic samples from the Okinawa Trough, with titanomagnetite as the dominant magnetic mineral. Results show that the Curie temperature of Ti-rich titanomagnetites (T<sub>c TM-R</sub>) not only has the potential to identify the influence of subduction fluids in back-arc basins but also can be used to differentiate basalts and basaltic andesites that have been formed in different geologic settings. Additionally, the magnetic domain state ranges from single domain to multi-domain as the fractional crystallization proceeds. Our study illustrates that magnetic properties of titanomagnetite are potential tracers for subduction fluids and fractional crystallization, which is of referential significance for research on relatively scarce samples from subduction zones and even extraterrestrial bodies.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 10","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL115006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144118113","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
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