Marine Geology最新文献

{"title":"Reconstructing Holocene seismic and tsunami history along the Rio Grande coast, Oaxaca, Mexico","authors":"Oswaldo Coca ,&nbsp;María Teresa Ramírez-Herrera ,&nbsp;Krzysztof Gaidzik ,&nbsp;Steven L. Forman ,&nbsp;Víctor Vargas-Espinosa ,&nbsp;Luis Ramón Velázquez-Maldonado ,&nbsp;Néstor Corona ,&nbsp;Ana Carolina Ruiz-Fernández","doi":"10.1016/j.margeo.2025.107617","DOIUrl":"10.1016/j.margeo.2025.107617","url":null,"abstract":"<div><div>This study aims to identify past earthquakes and tsunamis in the Oaxaca region of Mexico, a segment of the subduction zone between the Cocos and North American plates. We reconstructed paleoelevations from the sedimentary record using diatom-based transfer functions to identify co-seismic, post-seismic, inter-seismic, and permanent deformation associated with land-level changes. To achieve this, we developed a paleoelevation model using modern diatoms. Up to four allochthonous sand layers were identified as tsunami deposits and their triggering earthquakes, associated coseismic uplift and subsidence. Unit 1 (1769 ± 74 CE) records co-seismic uplift of 0.065 ± 1.04 m and is associated with the 1787 M8.6 earthquake and tsunami. Unite 2 (1085 ± 40 CE) records a co-seismic uplift of 0.082 ± 0.93 m. Unite 3 (830 ± 45 CE) shows a co-seismic subsidence of −0.091 ± 1.08 m. Unite 4, dated between 811 and 751 cal BC and 766–465 cal BC, records a co-seismic uplift of 0.513 ± 0.37 m, likely caused by a &gt; M7.5 tsunamigenic earthquake. The reconstructed magnitudes, inferred from land-level changes, reveal a variable seismic history. Finally, we identified a cumulative permanent uplift deformation of 0.76 m over the last 2800 years.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"488 ","pages":"Article 107617"},"PeriodicalIF":2.6,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144633331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the response and recovery of beach sediments under the impact of Typhoon “Chaba” (no. 2203) and high-elevation aquaculture pond effluent discharge","authors":"Mingming Yuan ,&nbsp;Liping Huang ,&nbsp;Yuehua Qi ,&nbsp;Dezhi Chen ,&nbsp;Longbo Deng ,&nbsp;Lintao Zhao ,&nbsp;Gaocong LI","doi":"10.1016/j.margeo.2025.107616","DOIUrl":"10.1016/j.margeo.2025.107616","url":null,"abstract":"<div><div>Under the combined influences of climate change and human activities, coastal sediments dynamic and recovery mechanisms following extreme storm events have become central issues in coastal research and management. This study investigates beach sediment dynamics and recovery processes under the joint effects of Typhoon No. 2203 “Chaba” and high-elevation aquaculture pond (HEAP) effluent discharge. The key findings are as follows: Typhoon forcing conditions: During the event, wind direction shifted from ES to N and wind speed rose from 6.46 m/s to 14.43 m/s, superimposed on a 4.18 m storm surge. The mean wave period and significant wave height rose to 7.34 s and 1.38 m, respectively, while the shear-stress due to waves surged from 0.20 to 4.20 N/m²—far exceeding the threshold shear-stress of 0.60 N/m². On the normal beach, typhoon events led to finer sediment deposition on the upper beach and coarser sediment on the lower beach. These changes rapidly returned to the pre-typhoon state within one week. On the impacted beach, typhoon events and aquaculture effluent significantly altered sediment distribution. Combined effects of effluent-driven morphology and hydrodynamics caused complex patterns and limited recovery. Effluent discharge, tidal action, and wave dynamics collectively establish a high-energy conduit system that extends the landward reach of tidal inundation and intensifies erosion at the beach berm and coastal dune front. This synergistic forcing underlies the rapid evolution of scour-trench and grain-size distributions during extreme events. Therefore, it is recommended to implement coordinated strategies in terms of drainage outlet placement, ecological protection measures, and management practices. These measures aim to promote harmony between aquaculture and the beach environment, ensuring sustainable ecological and economic development.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"488 ","pages":"Article 107616"},"PeriodicalIF":2.6,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Floc size asymmetry modulated by tidal dynamics drives net landward sediment transport in a man-made tidal channel","authors":"Wenjian Li ,&nbsp;Guan-hong Lee ,&nbsp;Jongwi Chang ,&nbsp;Ojudoo Darius Ajama ,&nbsp;Zhenyan Wang","doi":"10.1016/j.margeo.2025.107615","DOIUrl":"10.1016/j.margeo.2025.107615","url":null,"abstract":"<div><div>In natural aquatic systems, flocculation affects sediment transport by altering particle size and settling velocity. However, the asymmetry in floc size over tidal cycles and its influence on sediment transport, especially in turbid coastal regions affected by human activities, remains understudied. This study uses comprehensive observations from ADV, HR-ADCP, Signature ADCP, LISST, and CTD within a man-made tidal channel located on the west coast of the Korean Peninsula to elucidate the size-dependent sediment transport process. Our findings reveal a tidal asymmetry in bottom shear velocity and particle size distribution (PSD). During ebb tide, the bottom shear velocity was higher, but suspended sediment concentration (SSC), Total Volume Concentration (TVC), and mean size (<span><math><msub><mi>M</mi><mi>z</mi></msub></math></span>) were lower compared to flood tide. This suggests that advection transport, in addition to resuspension, is a significant source of particles during flood tide. These particles increased SSC, TVC, and landward sediment flux, while low shear velocity facilitated flocculation, resulting in higher <span><math><msub><mi>M</mi><mi>z</mi></msub></math></span>. Consequently, a higher proportion of microflocs and macroflocs occurred, leading to a higher settling flux from flood tide to high slack water. In contrast, weaker advection transport and low SSC during ebb tide led to lower seaward sediment flux, with stronger shear velocity and lower concentration resulting in weak flocculation and lower <span><math><msub><mi>M</mi><mi>z</mi></msub></math></span>. During ebb tide, flocculi (10–20 μm diameter) exceeded microflocs and macroflocs, causing a lesser settling flux. This tidal asymmetry in floc size explains the trapping of larger particles during flood tide and high water levels, ultimately leading to net landward sediment flux in the channel over tidal cycles.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"488 ","pages":"Article 107615"},"PeriodicalIF":2.6,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144580594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Bering Sea shelf as a sink for terrigenous organic carbon: Insights from sediment geochemistry","authors":"Song Zhang ,&nbsp;Zhongqiao Li ,&nbsp;Bassem Jalali ,&nbsp;Youcheng Bai ,&nbsp;Zhongqiang Ji ,&nbsp;Hongliang Li ,&nbsp;Haiyan Jin ,&nbsp;Jianfang Chen","doi":"10.1016/j.margeo.2025.107614","DOIUrl":"10.1016/j.margeo.2025.107614","url":null,"abstract":"<div><div>Recent Arctic warming has accelerated permafrost thaw, mobilizing ancient organic carbon (OC) into the ocean. The Bering Sea, connected to major rivers such as the Yukon and Anadyr, receives substantial terrigenous carbon inputs. However, the sources and fate of the terrigenous OC remain poorly characterized. In this study, we aimed to assess the sources and sinks of organic matter on the Bering Sea Shelf by analyzing multi parameters such as TOC, TN, δ¹³C, lignin phenols, grain size and SSA of the surface sediments. OC and TN exhibit similar spatial patterns, with higher concentrations in the western region but lower along the Alaska Coastal Current (ACC). δ¹³C values decreased from east to west, ranging from −24.36 ‰ to −22.03 ‰, suggesting a westward decline in terrigenous OC influence, corroborated by C/N ratios. Lignin content (Λ8) varies from 0.49 to 4.58 mg/100 mg OC, peaking near the Yukon River estuary. Ratios of syringyl to vanillyl (S/V) and cinnamyl to vanillyl (C/V) phenols indicate mixed inputs from angiosperms and gymnosperms. Our findings demonstrate that the distribution of terrigenous OC is primarily governed by hydrodynamic sorting and mineral surface adsorption. We conclude that the Bering Sea shelf functions as a net sink for terrigenous organic carbon, a phenomenon expected to intensify with anticipated Arctic warming.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"488 ","pages":"Article 107614"},"PeriodicalIF":2.6,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144580592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two millennia of intense tropical cyclone activity in the western North Pacific: Insights from coastal boulder deposits","authors":"Kenta Minamidate ,&nbsp;Takashi Ishizawa ,&nbsp;Hironobu Kan ,&nbsp;Yusuke Yokoyama ,&nbsp;Naoto Koiwa ,&nbsp;Akifumi Ito ,&nbsp;Kazuhisa Goto","doi":"10.1016/j.margeo.2025.107612","DOIUrl":"10.1016/j.margeo.2025.107612","url":null,"abstract":"<div><div>Tropical cyclones (TCs) are among the most destructive hydrodynamic disturbances, yet our knowledge of their long-term climatology is limited by the short length of observational records. Geological records provide valuable insights into TC activity before modern observation. Although the western North Pacific (WNP) is the most active TC basin, little is known about how intense TCs have responded to long-term climate variability. Here, this study presents a new two-millennia record of intense TC activity from coastal boulder deposits on Amami-Oshima Island in the Ryukyu Islands, Japan. The results indicate reduced TC activity during colder periods, including the Late Antique Little Ice Age (LALIA; 540–660 CE) and the Little Ice Age (LIA; 1400–1700 CE), and increased activity from the end of cold periods to warm periods, including the Medieval Climate Anomaly (MCA; 950–1250 CE) and the Current Warm Period (CWP; 1850 CE–present). Our integration of paleo-TC and paleoclimate records shows that TC activity had been synchronously activated during warm periods at middle latitudes in the WNP; however, it had been enhanced during the LIA at low latitudes. These meridional anti-phase patterns are likely driven by the variability in air and sea surface temperature and associated shifts in the Hadley circulation. Given the unprecedented rise in global mean temperature, ongoing climate change may drive significant changes in TC behavior, potentially mirroring or exceeding past warm-period trends.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"488 ","pages":"Article 107612"},"PeriodicalIF":2.6,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144556701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Supra-subduction lithospheric metasomatism and water outflux beyond island-arc volcanism","authors":"Mengming Yu ,&nbsp;Chi-Yue Huang ,&nbsp;Graciano P. Yumul Jr. ,&nbsp;Jonny Wu ,&nbsp;Guangfa Zhong ,&nbsp;Minghui Zhao ,&nbsp;Yi Yan","doi":"10.1016/j.margeo.2025.107613","DOIUrl":"10.1016/j.margeo.2025.107613","url":null,"abstract":"<div><div>Understanding the global water balance between subduction influx and outflux requires exploring for unrecognized sources of water outflux beyond island-arc volcanism. Here we investigate the petrogenesis of the principal high-temperature hydrous mineral (i.e.<em>,</em> amphiboles) in oceanic gabbros of the Huatung Basin, an Early Cretaceous oceanic relict sandwiched between the Gagua Ridge Arc and the Taiwan-Luzon Arc in the northwesternmost corner of the Philippine Sea Plate. The amphiboles show low TiO₂ (&lt;1.5 wt%) and Nb/Yb (≤0.3) and ∼550–800 °C equilibration temperatures using amphibole-plagioclase thermometry, indicating high-temperature metamorphic origins. The low whole-rock ⁸⁷Sr/⁸⁶Sr (703216–0.703294) indicates the fluids involved in the formation of these amphiboles were hydrous island-arc melts. Viewed in conjunction with the large variations of the existed radioisotopic ages (∼130, ∼123–116, ∼105, and ∼70 Ma), the reported seismic velocity structure of the Huatung Basin that implies younger ocean lithosphere ages (20–50 Ma) is likely related to pervasive supra-subduction lithospheric metasomatism of the oceanic lithosphere. This metasomatism was probably hosted by intrusions of Gagua Ridge and Taiwan-Luzon island-arc magmatism. We suggest that such metasomatism of supra-subduction lithosphere by hydrous island-arc melts could be important for water outflux beyond island-arc volcanism globally.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"488 ","pages":"Article 107613"},"PeriodicalIF":2.6,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"14C dating of tsunami deposits in arid environments: How challenging can it be? The example of La Graciosa, Canary Islands","authors":"Raphaël Paris ,&nbsp;Franck Lavigne ,&nbsp;Christine Hatté ,&nbsp;Juan Francisco Betancort ,&nbsp;Jean-Pierre Flandrois ,&nbsp;Arnauld Vinçon-Laugier ,&nbsp;Eve Poulallion ,&nbsp;Simon Falvard ,&nbsp;Bachtiar W. Mutaqin ,&nbsp;Christophe Lécuyer","doi":"10.1016/j.margeo.2025.107607","DOIUrl":"10.1016/j.margeo.2025.107607","url":null,"abstract":"<div><div>¹⁴C dating of tsunami deposits in arid environments is often challenging, especially when there is no organic material available. The marine bioclasts found in the tsunami deposits thus become the main dating possibility. Apart from the reservoir effect, the main source of uncertainty is the age difference between the shells and the tsunami that transported them. Taking as an example a tsunami deposit on the island of La Graciosa (Canary Islands), we demonstrate that the marine shells (<em>Patella</em>) come from different sources, with ¹⁴C ages ranging from &gt;45 kBP to 200 BP, the main source being an ancient marine terrace probably of MIS5e age. In addition, we propose a landslide source for this tsunami, the scar of which can be observed on the Famara cliff to the northeast of Lanzarote, just opposite the tsunami deposit outcrops at La Graciosa. In addition to the methodological aspects of shell dating, this study also serves as a reminder that local tsunamis generated by coastal cliff collapses are not a hazard to be neglected.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"488 ","pages":"Article 107607"},"PeriodicalIF":2.6,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144490026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The geomorphometry of Antarctic submarine canyons","authors":"Riccardo Arosio ,&nbsp;David Amblas","doi":"10.1016/j.margeo.2025.107608","DOIUrl":"10.1016/j.margeo.2025.107608","url":null,"abstract":"<div><div>Submarine canyons are deep, large-scale incisions found on most of the world's continental margins. In Antarctica, canyons are widespread features driving mesoscale oceanographic processes with significant implications for global climate and circulation, connecting shallow to deep sedimentary processes and positively influencing biodiversity and ecosystem functioning. The understanding of their oceanographic, climatic, geological and ecological significance is limited by the detail, accuracy and extent of canyon inventory. This study aims to create the best possible catalogue of Antarctic submarine canyons and gullies taking advantage of the new International Bathymetric Chart of the Southern Ocean (IBSCO) v.2. Semi-automatic hydrological techniques were adopted to delineate the drainage network, and to extract attributes such as the stream order, stream gradient and sinuosity. We identified 332 drainage networks with 3291 stream segments, nearly 5 times the number of canyons identified in previous studies, and calculated 15 morphometric parameters for each segment. We observe significant differences across Antarctic margins. East Antarctica shows the most complex and largest drainage networks, while the Antarctic Peninsula has the greatest number of networks, although with the lowest stream orders and shortest lengths. Western Antarctica has less complexity and shorter network lengths compared to East Antarctica. These differences may reflect the contrasting glacial histories of the two regions, with the earlier onset of the East Antarctic Ice Sheet leading to older and more developed canyon systems.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"488 ","pages":"Article 107608"},"PeriodicalIF":2.6,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144490025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sedimentary records of mid-Holocene extreme storm events and Neolithic cultural response in the Yaojiang-Ningbo Plain, East China","authors":"Fangyou Lin ,&nbsp;Shuwen Mei ,&nbsp;Hao Xu ,&nbsp;Maojie Yang ,&nbsp;Michael E. Meadows ,&nbsp;Zhanghua Wang (王张华)","doi":"10.1016/j.margeo.2025.107611","DOIUrl":"10.1016/j.margeo.2025.107611","url":null,"abstract":"<div><div>The Yaojiang-Ningbo coastal plain in East China is naturally vulnerable to salinity intrusion. At around 5.3 ka, the study area experienced a period (the 5.3 ka extreme storm period) when extreme storm events and associated salinity intrusions were especially frequent. Sedimentary records are widely distributed in the plain but have thus far not been systematically amalgamated, constraining interpretation of the impacts of these extreme storms on prehistoric coastal communities. Here we present a multi-proxy analysis of the chronology, sedimentology, and geochemistry of a profile containing records of the 5.3 ka extreme storm period from a newly excavated Neolithic site, Hukengji, in the Yaojiang-Ningbo plain. Results of the paleoenvironmental reconstruction evidences a tidal marsh environment at the site at ca. 6.0 ka, which was exposed to salinity intrusions at ca. 5.3 ka and river flooding at ca. 5.1 ka. Through comparison with other sedimentary records in the region, we show that the 5.3 ka extreme storm period in the Yaojiang-Ningbo Plain extended from ca. 5.4 ka to ca. 4.9 ka, with two peaks at around 5.3 ka and 5.1 ka. Communities of the Hemudu Culture Period IV adapted to this phase of coastal flooding, for example, by constructing artificial mounds. However, the effects of the extreme hydroclimatic events during the 5.3 ka extreme storm period led eventually to the Hemudu Culture being replaced across the region by the more complex and socially stratified Liangzhu Culture from around 5.1 ka onwards.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"488 ","pages":"Article 107611"},"PeriodicalIF":2.6,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144516952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The utility of mangrove foraminifera, diatoms, and stable carbon isotope and C/N geochemistry in relative sea-level reconstruction in the Pearl River Delta, China","authors":"Howard K.Y. Yu ,&nbsp;Nicole S. Khan ,&nbsp;Nina Desianti ,&nbsp;Ed Garrett ,&nbsp;Noah J. Planavsky ,&nbsp;Ayesha Ahmed","doi":"10.1016/j.margeo.2025.107610","DOIUrl":"10.1016/j.margeo.2025.107610","url":null,"abstract":"<div><div>We investigated the utility of foraminifera, diatoms, and δ¹³C and C/N geochemistry as proxies for generating late Holocene relative sea-level (RSL) records from Deep Bay on the eastern side of the Pearl River Delta. We described the contemporary distribution of these proxies from 66 samples across subtidal, intertidal (mudflat and mangrove), and upland environments from three transects. Using Partitioning Around Medoids (PAM) cluster analysis, we identified ten distinct, vertically-zoned groups of foraminifera and two groups of diatoms. Canonical Correspondence Analysis (CCA) revealed that tidal elevation was the primary environmental variable controlling foraminiferal assemblages, while salinity, which covaried with elevation, primarily influenced diatom assemblages. We also identified 6 vertically-zoned, environmental zones on the basis of δ¹³C and C/N geochemistry using linear discriminant analysis (LDA). Bayesian transfer functions (BTFs) were developed from modern foraminifera and diatom training sets incorporating priors from geochemically-defined environmental zones and BTF predictions derived from the other microfossil group. These BTFs were applied to a sediment core collected from contemporary mangroves, which began accumulating around 1960 CE. Comparison of our RSL reconstructions with local tide gauge records demonstrated that incorporating informative priors improved the accuracy and precision of RSL reconstructions. Among the approaches tested, microfossil BTF-derived priors yielded greater improvement, producing lower prediction uncertainties compared to those based on geochemical priors. The foraminifera BTF captured all tide gauge observations within its 1σ uncertainty bounds regardless of whether informed by priors, while using diatom BTF priors led to a reduction in Mean Squared Error (MSE) by 121 % (MSE: 0.014 m²), and average 1σ uncertainty by 36 %. The incorporation of foraminifera BTF priors in the diatom BTF did not result in substantial improvements in accuracy but reduced its average 1σ uncertainty by 43 %. Our results demonstrate that foraminifera, diatoms, and δ¹³C and C/N geochemistry together offer robust tools for reconstructing late Holocene RSL in the Pearl River Delta, although their utility in isolation is limited by poor preservation of foraminiferal tests and the influence of planktonic diatom taxa in sediment archives.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"488 ","pages":"Article 107610"},"PeriodicalIF":2.6,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144469881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}