Palaeogeography, Palaeoclimatology, Palaeoecology最新文献

{"title":"Latest Oligocene (late Chattian) environmental transitions revealed by plant-insect interactions preserved in plant assemblages from Wind Brickyard, Eger, Hungary","authors":"Imre Gyökeres ,&nbsp;Benjamin Adroit ,&nbsp;Árpád Dávid","doi":"10.1016/j.palaeo.2025.112828","DOIUrl":"10.1016/j.palaeo.2025.112828","url":null,"abstract":"<div><div>Plants and insects are fundamental components of terrestrial ecosystems; evidence of their interactions (preserved as trace fossils on leaves) provides valuable insights into past environments. The Wind Brickyard succession in Hungary (Central Paratethys), of latest Oligocene age, offers a rare opportunity to study well-preserved evidence of plant-insect interactions and palaeoclimate across three plant-bearing intervals. Coinciding with the Late Oligocene Warming Event and the onset of the Miocene Glaciation, the Wind Brickyard assemblages capture palaeoecological responses to climate change, filling a critical knowledge gap in European palaeoecosystems. By integrating herbivory analysis and CLAMP-based palaeoclimate reconstructions, this study contributes to our understanding of how palaeoenvironmental and palaeoclimatic factors shaped latest Oligocene biodiversity over time. In this study, a total of 1310 fossil leaves from three different stratigraphic intervals were analyzed. Thirty-three, mostly generalized, damage types were documented. The greatest damage frequency and richness occurred in the upper of the three levels, which is represented by mainly azonal elements of riparian and swamp vegetation. This higher proportion of specialized insect damage is connected to elements of the zonal vegetation. These findings suggest that environmental changes and host plant zonality influenced the greater damage richness and frequency in the upper layer, highlighting significant ecological shifts close to the Oligocene-Miocene boundary.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"666 ","pages":"Article 112828"},"PeriodicalIF":2.6,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510449","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}

{"title":"Holocene coral reef carbonate REY geochemistry during the neomorphism from aragonite to calcite: A case study in the South China Sea","authors":"Wei Jiang ,&nbsp;Yuwen Xiao ,&nbsp;Kefu Yu ,&nbsp;Rui Wang ,&nbsp;Shendong Xu ,&nbsp;Ning Guo ,&nbsp;Tingwu Gu","doi":"10.1016/j.palaeo.2025.112835","DOIUrl":"10.1016/j.palaeo.2025.112835","url":null,"abstract":"<div><div>The geochemistry of rare earth elements and yttrium (REY with Y, REE without Y) in reefal carbonates is increasingly used to investigate both palaeoceanography and modern oceans. Nevertheless, the application of these methods to elucidate climate dynamics of the geologic past is limited by their vulnerability to diagenetic alterations. Given the meteoric transformation of aragonite to calcite, which represents an extremely unfavorable scenario for preserving the original marine signature, we focused on the REY geochemistry of a Holocene coral reef, obtained from Well CK2 in the northern South China Sea, which initiated at ⁓7.8 ka BP, but ceased to grow vertically at ⁓3.9 ka BP. The Holocene reefal carbonates have undergone neomorphism, transforming aragonite into calcite in a meteoric environment and enabling a direct comparison of REY distributions between the original aragonite and neomorphic calcite. Despite the preserved REY patterns of stabilized calcite closely mirroring those initially present in surface seawater, the ΣREE contents and Ce anomalies vary significantly, reflecting mixing of REY from reefal microbialites. Despite these disturbances, the Nd_N/Yb_N and Y/Ho ratios of Holocene reefal carbonates still demonstrate a highly conservative behavior during diagenesis. Our study indicates that the initial REY parameters, such as Nd_N/Yb_N and Y/Ho ratios, are frequently preserved in Holocene reefal carbonates, thus offering significant support for employing ancient marine limestones as indicators of marine REY geochemistry. Nevertheless, prudence is advised when utilizing ΣREE contents and Ce anomaly.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"665 ","pages":"Article 112835"},"PeriodicalIF":2.6,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143473895","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}

{"title":"Recent cooling enhances glacier resilience to global warming in the northern Karakoram: Evidence from tree rings","authors":"Wentai Liu ,&nbsp;Qiang Li ,&nbsp;Qiufang Cai ,&nbsp;Huiming Song ,&nbsp;Changfeng Sun ,&nbsp;Piotr Owczarek ,&nbsp;Meng Ren ,&nbsp;Yifan Ma ,&nbsp;Xiangyu Duan ,&nbsp;Olga Solomina ,&nbsp;Vladimir Matskovsky ,&nbsp;Yu Liu","doi":"10.1016/j.palaeo.2025.112836","DOIUrl":"10.1016/j.palaeo.2025.112836","url":null,"abstract":"<div><div>Since the late 20th century, global warming has resulted in the significant retreat of alpine glaciers in high-altitude mountainous regions worldwide. However, the glaciers in the Karakoram Mountains of Central Asia have remained stable or even expanded over recent decades, a phenomenon termed the “Karakoram Anomaly”. Here, we use tree-ring width of <em>Picea schrenkiana</em> growing at high altitudes of the Karakoram Mountains, to reconstruct summer (June–August) temperature variations since 1851 (<em>r</em> = 0.66, <em>n</em> = 62, <em>p</em> &lt; 0.001), and to investigate the climatic context of the “Karakoram anomaly”. Comparative analysis with nearby tree-ring studies, glacier mass balance series in Central Asia, and Northern Hemispheric temperature reconstructions reveals a significant divergence in summer temperature trends in the Karakoram Mountains after the 1980s, corresponding to anomalous glacier behavior. The combination of increased precipitation, reduced summer temperatures, and specific glacier conditions in the Karakoram region has created a unique set of natural conditions that diverge from global trends. Our findings provide further evidence supporting the existence of the “Karakoram Anomaly” under global climate change.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"666 ","pages":"Article 112836"},"PeriodicalIF":2.6,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487937","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}

{"title":"Dietary reconstruction of Mammuthus columbi from Tultepec, Estado de México, México: A multiproxy approach","authors":"Susana Rodríguez-Franco ,&nbsp;Víctor Adrián Pérez-Crespo ,&nbsp;Christina I. Barrón-Ortiz ,&nbsp;Luis Córdoba-Barradas ,&nbsp;Joaquín Arroyo-Cabrales ,&nbsp;Florent Rivals ,&nbsp;Edith Cienfuegos-Alvarado ,&nbsp;Francisco J. Otero ,&nbsp;Alan U. Loredo-Jasso ,&nbsp;Laura Eugenia Beramendi-Orosco","doi":"10.1016/j.palaeo.2025.112829","DOIUrl":"10.1016/j.palaeo.2025.112829","url":null,"abstract":"<div><div>Using carbon and oxygen isotopic values from tooth enamel, as well as carbon and nitrogen from collagen and, dental microwear analysis, the diet and other paleobiological characteristics of 11 specimens of <em>Mammuthus columbi</em> from the Tultepec I and Tultpec II deposits, Estado de México, México, were inferred; additionally, three mandible bones were radiocarbon dated (13,170–13,450 cal BP). The results of carbon isotope analyses of enamel and collagen reveal that 10 individuals had a mixed C₃/C₄ diet and only one showed δ¹³C values indicative of a C₃ plant-based diet. Similar results were obtained from the analysis of dental microwear, where most individuals were identified as mixed feeders and only one as a browser.</div><div>The results of the different proxies suggest that some individuals modified their dietary habits during their lifetime while others maintained them. In the case of δ¹⁸O values, these show that perhaps the Tultepec population was composed of local individuals and migrants from other localities. The variations observed among the δ¹⁵N values of the individuals studied are possibly influenced by milk intake, as well as the consumption of nitrogen-fixing plants and hydric stress.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"666 ","pages":"Article 112829"},"PeriodicalIF":2.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519917","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}

{"title":"Biogeography of Hainan Island, southern China, and the falsification of the ‘shifting-landmass’ hypothesis","authors":"Jason R. Ali ,&nbsp;Yong-Xiang Li ,&nbsp;Uwe Fritz","doi":"10.1016/j.palaeo.2025.112832","DOIUrl":"10.1016/j.palaeo.2025.112832","url":null,"abstract":"<div><div>A radical vicariance-biogeographical theory was proposed in 2016 to account for some of the plant taxa on China's Hainan Island. It involves the landmass undergoing significant changes in its position relative to mainland southern China between the Late Cretaceous and the present. This ‘shifting-landmass’ hypothesis has since been widely adopted and is now invoked to explain the occurrence of 17 faunal and multiple floral components (based on 14 published studies). In this paper, we review geological and biological evidence that falsify this conjecture. First, Hainan shifted no more than <em>c</em>. 47 km to the SE, through extension and strike-slip faulting within the Beibu Gulf Basin, principally in the Late Eocene through Oligocene. Second, our biological appraisal, using data for the claimed supportive clades plus the island's 41 amphibian and 48 land-bound mammal groups (such taxa are poor over-water dispersers and should thus inform tests of the vicariance hypothesis), offers minimal backing. Just three lineages (<em>Goniurosaurus</em> geckos, pheretimoid earthworms and <em>Stedocys</em> spitting spiders) have ‘colonization intervals’ that overlap the 70–23 Mya window that is associated with the hypothesis, as well as being sourced from Vietnam-Guangxi (the proposal's second element). Of the remaining 90 clades that have establishment ages, all but one arrived after 6.5 Mya with most since 2 Mya. The geological evidence indicates that throughout the Cenozoic, Hainan never really functioned as an island due to the frequent eustatic falls, which when combined with the surrounding shallow seabed resulted in the landmass regularly merging with Indochina and mainland southern China. This explains the preponderance of young clades, many of which are non-endemic. Furthermore, there is no obvious preference to the taxa's geographical origins, that is, tropical Indochina or temperate southern China; most are classified as ‘of indeterminate biogeographical origin’.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"666 ","pages":"Article 112832"},"PeriodicalIF":2.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143550488","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}

{"title":"Coprostanol records from two distinct prehistoric profiles in the middle and lower reaches of the Yellow River, China, provide evidence of anthropogenic fires","authors":"Zhihai Tan ,&nbsp;Qi Zhang ,&nbsp;Yongming M Han ,&nbsp;Longjiang Mao ,&nbsp;Shuxin Zheng ,&nbsp;Meng Wang ,&nbsp;Huanrong Zuo ,&nbsp;Hanmiao Qin","doi":"10.1016/j.palaeo.2025.112817","DOIUrl":"10.1016/j.palaeo.2025.112817","url":null,"abstract":"<div><div>Resolving the complex interplay between natural and anthropogenic fire drivers remains a critical challenge in paleoenvironmental studies. This investigation employs an innovative multi-proxy approach integrating fecal stanol biomarkers with high-resolution records of charcoal and black carbon to reconstruct Holocene biomass burning dynamics and human-environment interactions at two key prehistoric profiles: the Yangguancun (YGC) loess profile (Shaanxi Province, the middle reaches of the Yellow River Drainage Basin) and Changyi (CY) terrestrial sequence (Shandong Province, the lower reaches of the Yellow River Basin). Our analysis reveals three distinct fire regime phases across the basin: 1) Early Holocene monsoon-controlled infrequent wildfires (8700–8500 yr BP), 2) Mid-late Holocene localized anthropogenic high biomass burning (6000–1000 yr BP), and 3) Recent millennium-scale regional anthropogenic combustion dominance. Between 6200 and 5300 yr BP, high-intensity biomass burning in the middle reaches of the Yellow River was primarily driven by frequent slash-and-burn practices for forest clearance for millet cultivation and daily subsistence activities during the late Miaodigou and Banpo IV Cultures. Contrastingly, between 4000 and 3500 yr BP, low-intensity smoldering fires in the lower reaches of the Yellow River were associated with persistent aridity and deforestation during the Longshan and Yueshi Cultures. These contrasting fire regimes reflect the complex interplay between monsoon-driven climate variability and anthropogenic land-use practices, leading to significant landscape changes in the region during the mid-to-late Holocene. Meanwhile, the region underwent a vegetation evolution, transitioning from fire-resilient natural forests and grasslands to fire-prone secondary shrub lands and cultivated lands. It was noted that long-term deforestation and vegetation fragmentation, exacerbated by persistent drought, has triggered smoldering biomass burning pattern, which have become a primary driver of future wildfires and vegetation degradation in the middle and lower reaches of the Yellow River. Combining fecal stanol molecular biomarkers with sedimentary charcoal and black carbon records, we clarify the distinctions between natural and human-induced fires, providing a deeper understanding of the impact of anthropogenic biomass burning on regional and global warming.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"666 ","pages":"Article 112817"},"PeriodicalIF":2.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487931","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}

{"title":"Variation in climate and hydrological conditions in Southwest China during the mid-to-late Holocene, inferred from stalagmite multiple proxies","authors":"Hua-Yan Li ,&nbsp;Yao Wu ,&nbsp;Ting-Yong Li ,&nbsp;Rong Duan ,&nbsp;Hai-Bo Wang ,&nbsp;Jia-Hui Cui ,&nbsp;Chao-Jun Chen ,&nbsp;Yue Jin ,&nbsp;Yue-Hua Xiang ,&nbsp;Zi-Qi Liu ,&nbsp;Jun-Yun Li","doi":"10.1016/j.palaeo.2025.112831","DOIUrl":"10.1016/j.palaeo.2025.112831","url":null,"abstract":"<div><div>Speleothem δ¹⁸O, δ¹³C, growth rate, Mg/Ca and Sr/Ca record varying environmental information due to their different influencing factors. Multiproxy analysis provides a deeper, multiangled interpretation of the palaeoclimate information recorded in speleothems. This work analyses the environmental information recorded by the δ¹⁸O, δ¹³C, growth rate, Mg/Ca and Sr/Ca ratios of multiple stalagmites, and other proxies of lake sediments in Southwest China during the mid-to-late Holocene. The results indicate that (1) the δ¹⁸O and δ¹³C values of stalagmite FL2 showed a gradually positive trend and were consistent with the decreasing pattern of precipitation affected by the Asian summer monsoon during 6.2–0.69 ka BP. (2) In the three periods of 6.2–4.2, 4.2–2.2 and 2.2–0.69 ka BP, the δ¹⁸O and δ¹³C values of stalagmite FL2 showed positive–negative–positive trends, respectively. Accordingly, the Mg/Ca ratios showed an increasing–decreasing–increasing trend, corresponding to the decreasing–increasing–decreasing variation characteristics of precipitation. The growth rate was sensitive to the increased precipitation from 4.2 to 2.2 ka BP. (3) The δ¹⁸O and δ¹³C values changed positively, and the Mg/Ca and Sr/Ca ratios increased when extreme climate events occurred (e.g. 5.5, 4.2, 2.8 and 1.0 ka event) in the mid-to-late Holocene. The multiple geochemical proxies of stalagmite FL2 corresponded well with the records in other stalagmites and lake sediments in Southwest China. (4) Principal component analysis (PCA) and power spectral analysis reveal that the δ¹⁸O values of stalagmite FL2 mainly respond to the changes in the Asian summer monsoon intensity at decadal to centennial scales and even longer. The δ¹³C values and Mg/Ca and Sr/Ca ratios mainly reflect decadal and multidecadal variability in regional precipitation.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"666 ","pages":"Article 112831"},"PeriodicalIF":2.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510454","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}

{"title":"The earliest evidence of true crabs? Insights on the evolution of Brachyura from an exceptional exposure of Carnian Psilonichnus (Upper Triassic, Braies, Dolomites, Italy)","authors":"Andrea Baucon ,&nbsp;Marco Avanzini ,&nbsp;Carlos Neto de Carvalho ,&nbsp;Zain Belaústegui ,&nbsp;Nereo Preto ,&nbsp;Anna Breda","doi":"10.1016/j.palaeo.2025.112820","DOIUrl":"10.1016/j.palaeo.2025.112820","url":null,"abstract":"<div><div>A new exceptionally exposed ichnofauna is reported from the Upper Triassic Travenanzes Formation of Braies in the Dolomites (Italy). The ichnosite is extraordinary in that it provides a continuous exposure of 32,000 m² of intensely bioturbated dolostone. The bioturbated surface is characterized by vertical burrows (<em>Psilonichnus upsilon</em>) occurring at a density of 5 openings / m². With more than 160,000 burrow openings, the Braies ichnosite preserves the largest exposure ever described for <em>Psilonichnus</em>. The <em>Psilonichnus-</em>bearing horizons represent a carbonate tidal flat that bordered an arid coastal plain, as evidenced by facies analysis and confirmed by the presence of <em>Taenidium barretti.</em> Comparison with modern ocypodid burrows indicates that the <em>Psilonichnus</em> from Braies are compatible with a crab tracemaker (Decapoda: Brachyura), which would represent the earliest fossil evidence for true crabs, although other arthropods cannot be fully discounted as the producers.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"667 ","pages":"Article 112820"},"PeriodicalIF":2.6,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562228","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}

{"title":"Rapid Indian Monsoon response to the Younger Dryas event in the Southeastern Tibetan Plateau","authors":"Xiqian Wang ,&nbsp;Liangcheng Tan ,&nbsp;Ashish Sinha ,&nbsp;Hai Xu ,&nbsp;Haiwei Zhang ,&nbsp;Jianghu Lan ,&nbsp;Jin Zhang ,&nbsp;Tianli Wang ,&nbsp;Dong Li ,&nbsp;Le Ma ,&nbsp;Jingjie Zang ,&nbsp;Xing Cheng ,&nbsp;Yanzhen Li ,&nbsp;Huiru Tang ,&nbsp;Xu Lin ,&nbsp;R. Lawrence Edwards ,&nbsp;Hai Cheng","doi":"10.1016/j.palaeo.2025.112808","DOIUrl":"10.1016/j.palaeo.2025.112808","url":null,"abstract":"<div><div>The Younger Dryas (YD) was a large-scale abrupt climate event during the last deglaciation with wide-ranging effects on the global environment. Here, we present an absolute dated speleothem oxygen isotope record (δ¹⁸O) of Indian Summer Monsoon (ISM) variability from Shenqi Cave in the southeastern Tibetan Plateau (TP) across the YD event. The δ¹⁸O of SQ8 increased markedly by ∼4 ‰ during the YD, which is substantially larger than other coeval stalagmite δ¹⁸O records from the East Asian and Indian monsoon regions. This distinct increase may be ascribed to the combined influences of the altitude effect and the diminished transpiration from vegetation. Our data indicate an abrupt increase in ISM strength occurred in tandem with the termination of the Younger Dryas (∼76 years). The ISM's rapid response to the YD event may be due to the TP's location upstream of Rossby waves, as well as the enhanced feedback caused by the surface ice and snow cover. Our data further indicate that multidecadal variations in ISM intensity are positively correlated with the Atlantic Multidecadal Oscillation (AMO) amplitude, modulated by long-term solar radiation and sea ice changes.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"665 ","pages":"Article 112808"},"PeriodicalIF":2.6,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474437","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}

{"title":"Quantitative climate reconstruction of the Mid- to late Holocene based on pollen records from Northern Shandong, China","authors":"Yaping Li ,&nbsp;Wenhao Zheng ,&nbsp;Wenfei Liu ,&nbsp;Kai Su ,&nbsp;Wei Liu ,&nbsp;Junna Zhang ,&nbsp;Kai Ning ,&nbsp;Zhenjing Yang ,&nbsp;Guiyun Jin","doi":"10.1016/j.palaeo.2025.112815","DOIUrl":"10.1016/j.palaeo.2025.112815","url":null,"abstract":"<div><div>Pollen serves as a critical proxy for quantitative paleoclimatic reconstruction, with high-quality modern pollen databases and advanced modeling approaches significantly enhancing the reliability of reconstructed climatic parameters and providing multifaceted insights into past climate dynamics. This study presents a quantitative paleoclimatic reconstruction based on pollen analysis from the Dingjiazhuang profile in northern Shandong, China. The LWWA (inverse) model at 900 km was identified as the optimal model for climatic parameter reconstruction. Our results delineate periodic changes of Mid- to Late Holocene climate in the study area through reconstructed curves of annual precipitation (Pann), mean precipitation of the warmest month (MPwa), mean temperature of the warmest month (MTwa), and mean temperature of the coldest month (MTco) spanning 8–2.6 ka. Five distinct climatic phases were identified: A cool-dry fluctuation phase (8.1–6.8 ka), a warm-humid Mid-Holocene Climatic Optimum (6.8–6.2 ka), a transitional cool-humid phase (6.2–5.3 ka), a warm-dry phase (5.3–3.1 ka), and a cool-dry phase (3.1–2.6 ka). Millennial-scale variations were predominantly driven by the interplay between the East Asian Summer Monsoon (EASM) and East Asian Winter Monsoon (EAWM). Centennial-scale anomalies include 8.2 ka, 5.5 ka, and 4.2 ka events. The complex forcing mechanisms underlying these events warrant further investigation. This study represents the first attempt to establish climate quantification in northern Shandong, providing critical data support for understanding the environmental evolution of the East Asian monsoon region during the Holocene.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"665 ","pages":"Article 112815"},"PeriodicalIF":2.6,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454872","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}