Quaternary Science Reviews最新文献

{"title":"Underwater topography regulates the relationship between water depth and sedimentary n-alkane distributions in lakes","authors":"Durui Lin ,&nbsp;Enlou Zhang ,&nbsp;Weiwei Sun ,&nbsp;Xianqiang Meng ,&nbsp;Zhenyu Ni ,&nbsp;Yao Wang","doi":"10.1016/j.quascirev.2026.109803","DOIUrl":"10.1016/j.quascirev.2026.109803","url":null,"abstract":"<div><div>The <em>n</em>-alkane proxies have been widely employed to reconstruct past lake water levels. However, the associated hydrological interpretations remain debated: some studies suggested a lower proportion of aquatic macrophytes (P_aq) corresponding to deeper water depths, whereas others argued it indicated shallower conditions. In this study, a comprehensive survey of vegetation, terrestrial soils, and lake surface sediments in the Erhai Lake basin, southwest China, was conducted to examine the environmental significance of <em>n</em>-alkanes. Our results showed that the highest P_aq values occurred in shallow flat areas, consistent with the spatial distributions of modern submerged plants. Notably, the P_aq proxy exhibits completely opposite relationships with water depth in different underwater topographies. Specifically, the P_aq index shows a negative correlation with water depth in the gently sloping northern and southern sub-basins (<em>r</em> = −0.78), but a positive correlation in the steep central sub-basin (<em>r</em> = 0.63). The former pattern reflected more suitable growth conditions for submerged plants in extensive shallow littoral zones. In contrast, the steep littoral zone of the central basin lacked such gentle slopes for submerged plant growth. These findings highlight the essential role of underwater topography in interpreting <em>n</em>-alkane as a lake-level indicator. By accounting for underwater topographic influences, <em>n</em>-alkane-inferred lake-level changes in Erhai Lake since the last deglacial exhibited an increasing trend followed by a decline from the early to late Holocene, regulated by monsoon precipitation and summer insolation. The application of the P_aq index for the quantitative reconstruction of water depths has been explored but requires further refinement and improvement. This study provides an essential methodological framework for reconstructing historical water levels using P_aq index, thereby strengthening paleohydrological reconstructions.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"375 ","pages":"Article 109803"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Holocene climatic changes in the Kerguelen archipelago (South Indian Ocean) based on marine and lacustrine palaeoclimatic archives","authors":"Emeline Bellet ,&nbsp;Guillemette Ménot ,&nbsp;Christine Piot ,&nbsp;Xavier Crosta ,&nbsp;Vincent Grossi ,&nbsp;Marie-Alexandrine Sicre ,&nbsp;Mercedes Mendez-Millan ,&nbsp;Vincent Klein ,&nbsp;Salomé Ansanay-Alex ,&nbsp;Matthew Makou ,&nbsp;Jérôme Poulenard ,&nbsp;Emmanuel Malet ,&nbsp;Bernard Fanget ,&nbsp;Eivind Støren ,&nbsp;Nicolas Leviavan ,&nbsp;Aymeric Servettaz ,&nbsp;Jostein Bakke ,&nbsp;Pierre Sabatier ,&nbsp;Fabien Arnaud","doi":"10.1016/j.quascirev.2025.109753","DOIUrl":"10.1016/j.quascirev.2025.109753","url":null,"abstract":"<div><div>Climatic variability in the Southern Hemisphere is largely controlled by the latitudinal position of the Southern Hemisphere Westerly Winds (SHW), whose migration influences precipitation, temperature, and Antarctic upwelling. This study presents the results of analyses of two lacustrine sediment cores from Lake Armor, located on the subantarctic Kerguelen Islands (49°15′S, 69°10′E), within the SHW belt. Lipid biomarkers (Glycerol Dialkyl Glycerol Tetraethers, <em>n-</em>alkanes, and their hydrogen isotopes) were used to reconstruct mean annual air temperature above freezing (MAF) and humidity conditions. These records are compared with a high-resolution diatom-based summer sea surface temperature (SST) reconstruction from marine core MD11-3353, situated 150 km southwest of Lake Armor.</div><div>In the late glacial and Early Holocene, our results reveal a period of warm air temperature, comparable to current values and very warm sea surface temperature, 5 °C above the current values. Around 9000 cal a BP, an abrupt transition occurred, marked by a cooling of 5 °C in SST and 1.5 °C in MAF, interpreted as a northward migration of the SHW and associated oceanic fronts. The Mid-to-Late Holocene period is characterized by pronounced MAF variability, including a notably warm interval between 3000 and 2000 cal a BP, when <em>n-</em>alkane dD suggests the prevalence of wetter conditions. Since ∼250 cal a BP, a southward migration of the SHW has produced a 2.5 °C rise in MAF.</div><div>Our findings are overall consistent with previous studies from the Indian Ocean, but permit us to go a step further as by comparing SSTs and air temperatures. This suggests that SST is not a reliable predictor of air temperature on the Kerguelen Islands, particularly during the Early Holocene. We hence argue that Kerguelen air temperature is predominantly controlled by the position of westerly winds, as an indicator of reorganisations in air mass trajectories.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"375 ","pages":"Article 109753"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Holocene glacial history of southern Spitsbergen","authors":"Aleksandra Osika ,&nbsp;Jacek Jania ,&nbsp;Natalia Piotrowska ,&nbsp;Dmitry Tikhomirov ,&nbsp;Joanna Ewa Szafraniec ,&nbsp;Dhanushka Devendra ,&nbsp;Marcus Christl ,&nbsp;Markus Egli ,&nbsp;Andreas Vieli","doi":"10.1016/j.quascirev.2026.109811","DOIUrl":"10.1016/j.quascirev.2026.109811","url":null,"abstract":"<div><div>Climate change affects the extent of glaciers in Svalbard, and warmer periods of the Holocene may serve as analogues for predicting their future decay. While the Holocene glacial history of central, western and northern Svalbard is relatively well-studied, knowledge of glacier fluctuations in southern Spitsbergen remains limited. We reconstruct the Holocene glacier dynamics in Hornsund and adjacent areas, using geomorphological, geochronological, and historical data. New and published radiocarbon (¹⁴C) and cosmogenic nuclide (¹⁰Be) dates were combined with historical maps dating back to the 1600s and photographs from 1872 to 1936. The ages of mollusc shells from till deposits and Little Ice Age (LIA) moraines suggest glacier retreat in the Early Holocene, enabling colonisation of glacier-free branches of Hornsund. During the first half of the Late Holocene, the extent of tidewater glaciers remained reduced compared to their LIA maxima. Their limited advance was likely constrained by increasing sea-surface temperatures and atmospheric warming between c. 2.2–1.8 and 1.5–0.7 cal ka BP. The maximum Late Holocene glacier extents were associated with surges, probably preceded by ice mass accumulation due to climatic cooling and increased precipitation. However, many surges may also have occurred under warmer conditions. Most glaciers in southern Spitsbergen are highly sensitive to climatic changes, both through mass balance and surging, due to their specific topographic settings (low-elevation, gently sloping, long, multi-branched glaciers with overdeepenings in the bedrock). The interaction between climate variability and glacier surging played a crucial role in glacier evolution throughout the Holocene.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"375 ","pages":"Article 109811"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Re-evaluating Holocene ice-sheet thinning in the Indian Ocean sector of East Antarctica based on sea-level data and glacial isostatic adjustment modelling","authors":"Takeshige Ishiwa ,&nbsp;Jun'ichi Okuno ,&nbsp;Yuki Tokuda ,&nbsp;Satoshi Sasaki ,&nbsp;Takuya Itaki ,&nbsp;Yusuke Suganuma","doi":"10.1016/j.quascirev.2025.109786","DOIUrl":"10.1016/j.quascirev.2025.109786","url":null,"abstract":"<div><div>The study of past changes in East Antarctic Ice Sheet (EAIS) is crucial for understanding the ice-sheet dynamics and its response to the Earth's climate system. Field-based geological data and various model simulations, such as the ice-sheet and glacial isostatic adjustment (GIA) modelling, provide insights into the behaviour of the EAIS changes. Recent studies of in-situ cosmogenic nuclide surface exposure dates have revealed that large-scale thinning occurred in the Dronning Maud Land and Enderby Land of East Antarctica during 9–6 ka. However, the timing of this EAIS thinning event requires a refinement of the ICE-6G model, which is a widely used GIA-based ice-sheet history. To account for this temporal discrepancy of approximately 2,000 years, in which the ICE-6G model predicts ice thinning earlier than indicated by surface exposure dates, it is necessary to compare the sea levels by the GIA modelling with the geological sea-level data to evaluate the validity of this refinement. We established the sea-level dataset by recalibrating radiocarbon dates of previous works and incorporating 13 new sea-level data. The results of the refined ICE-6G model produced the higher Holocene sea-level peaks in the Lützow–Holm Bay, Dronning Maud Land, showing better consistency with sea-level data than the original ICE-6G model. Additionally, the refinements increase the vertical rate of uplift in the Lützow–Holm Bay, making it more consistent with reported GNSS observations. These findings demonstrate that the Holocene rapid ice sheet thinning is corroborated not only by surface exposure dates but also by sea-level data, thus validating the refinement and supporting the mechanism of warm water inflow driven by sea-level highstands, as proposed in previous study.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"375 ","pages":"Article 109786"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145886122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synchrony of prehistoric agricultural evolution and drought events in the North China Plain","authors":"Yanpeng Li ,&nbsp;Shengrui Li ,&nbsp;Hai Xu ,&nbsp;Keliang Zhao ,&nbsp;Guanhan Chen ,&nbsp;Yaping Zhang ,&nbsp;Jiacheng Ma ,&nbsp;Junchi Liu ,&nbsp;Yong Ge ,&nbsp;Yan Zheng ,&nbsp;Xinying Zhou ,&nbsp;Xiaoqiang Li","doi":"10.1016/j.quascirev.2026.109807","DOIUrl":"10.1016/j.quascirev.2026.109807","url":null,"abstract":"<div><div>Since the Holocene, marked transformations have occurred in patterns of human activity and modes of subsistence, with agriculture progressively becoming the principal means by which human societies modified and adapted to natural environments and sustained social development. The North China Plain (NCP) serves as the core region for the origin of millet agriculture in northern China and remains a pivotal area for understanding the genesis and evolution of Chinese civilization. By analyzing plant macrofossils from three sites—Zhujia, Dalaidian, and Wangzhuang—in the Qihe River basin (QRB), and integrating with crop assemblages from 54 representative sites across the North China Plain, this study systematically examines the synchrony between the evolution of Neolithic agricultural structures and climatic change in the region. The results demonstrate that multiple drought events had varying impacts on millet and rice agricultural systems in the NCP throughout the Neolithic period. Early communities responded to abrupt climatic perturbations by strategically adjusting agricultural structures to secure stable food supplies, thereby ensuring the sustained development of their societies. Furthermore, confronted with recurrent Neolithic drought events, prehistoric communities adopted diverse adaptive strategies, with their adaptive capacity progressively strengthening over time.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"375 ","pages":"Article 109807"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Onshore-offshore evidence for active tectonics and the propagation of the Zagros deformation front into the Persian Gulf","authors":"Aram Fathian ,&nbsp;Hemin Koyi ,&nbsp;Stefan Back ,&nbsp;Hamid Nazari ,&nbsp;Dan H. Shugar ,&nbsp;Mohammad Ali Shokri ,&nbsp;Klaus Reicherter","doi":"10.1016/j.quascirev.2025.109752","DOIUrl":"10.1016/j.quascirev.2025.109752","url":null,"abstract":"<div><div>The Zagros Mountains in southwest Iran are a young orogen displaying the geodynamic evolution in an active continental collision zone. We combine the analysis of geomorphology, remote sensing, geochronology, and seismic-reflection data to investigate the current kinematics of the Zagros foreland in SW Iran and identify tectonically active structures associated with the propagation of the deformation front of the Zagros fold-and-thrust belt. Seismic-reflection data in the Persian Gulf show evidence of syndepositional folding since at least &gt;300 ka BP. These data define the propagating deformation front of the Zagros fold-and-thrust belt by outlining actively growing, modern folds in the Persian Gulf several tens of kilometers off the coast. RTK GNSS surveying and geochronological dating were used to estimate the uplift rate of terraces on the southwestern limb of an onshore anticline. The uplift of such terraces and the development of new folds in the Persian Gulf indicate that shortening in the Zagros is accommodated within a wide zone (∼40–50 km) rather than along a linear deformation front. Congruent dextral bending of the northern hinges of fold axes, both on- and offshore, is interpreted to be linked to ongoing shortening accompanied by slip partitioning along the N-trending basement faults. This study demonstrates the benefit of analyzing contemporaneous incipient deformation and syn-kinematic sedimentation to outline a progressive deformation front in an active fold-and-thrust belt.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"375 ","pages":"Article 109752"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Cistercians as forerunners of the Anthropocene: a multi-proxy paleoecological study from western Poland","authors":"Sambor Czerwiński ,&nbsp;Piotr Kołaczek ,&nbsp;Piotr Guzowski ,&nbsp;Mariusz Gałka ,&nbsp;Monika Karpińska-Kołaczek ,&nbsp;Katarzyna Marcisz ,&nbsp;Adam Izdebski ,&nbsp;Malo Pilloix ,&nbsp;Mariusz Lamentowicz","doi":"10.1016/j.quascirev.2025.109779","DOIUrl":"10.1016/j.quascirev.2025.109779","url":null,"abstract":"<div><div>This study presents a high-resolution, multi-proxy paleoenvironmental reconstruction documenting nearly 1000 years of socio-ecological change under monastic and post-monastic land use based on the Święte peatland in western Poland. By integrating paleoecological proxies (pollen, micro- and macrocharcoal, testate amoebae, and plant macrofossils) with dense radiocarbon dating and historical records, we identified three major phases of landscape transformation: pre-Cistercian (ca. 1100–1270 CE), Cistercian (ca. 1270–1800 CE), and modern (ca. 1800–2017 CE). We show that after an initial capacity buildup, Cistercian economic activity significantly altered the local environment, initiating large-scale deforestation, peatland acidification, and hydrological shifts starting in the 14th century CE. Peat accumulation accelerated, enabling high-resolution insight into forest decline, agricultural expansion, and fine-grained socio-ecological dynamics, such as the temporary decline in human activity during the 17th-century CE military-epidemiological crisis, followed by a robust recovery. In the post-Cistercian phase, Prussian modernization efforts—such as wetland drainage and monoculture forestry—led to further ecological degradation. Our findings highlight the long-term impact of monastic and modern land use on wetland ecosystems, demonstrating how socio-political and economic dynamics shaped ecological resilience and induced degradation over centuries.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"375 ","pages":"Article 109779"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydroclimate changes on the Chinese loess plateau during Marine isotope stage 3 revealed by multi-proxy speleothem records","authors":"Yijia Liang ,&nbsp;Bin Zhao ,&nbsp;Jinguo Dong ,&nbsp;Jiaqi Cong ,&nbsp;Peng Zhang ,&nbsp;Yongjin Wang ,&nbsp;R. Lawrence Edwards","doi":"10.1016/j.quascirev.2026.109802","DOIUrl":"10.1016/j.quascirev.2026.109802","url":null,"abstract":"<div><div>The East Asian summer monsoon (EASM) is crucial to hydroclimatic anomalies on the Chinese Loess Plateau, although the relationship between them is ambiguous during the last glacial period. Based on ²³⁰Th/U dating, stable isotope and trace metal data from one stalagmite (No. L30), we reconstruct the evolution of EASM and palaeohydroclimate on the Chinese Loess Plateau from 53 to 38 ka BP during Marine Isotope Stage 3. On the millennial timescale, the δ¹⁸O record (a proxy of EASM intensity) captures Dansgaard-Oeschger (DO) 8–14 and Heinrich (H) 4–5 events, which are imprinted in δ¹³C and trace metal records. By applying principal component analysis to δ¹³C and trace metal data, we derived a local precipitation record that changes consistently with rapid monsoon shifts at the onset of DO and H events. However, disparities exist, manifested as an anomalously high-precipitation period from 44 to 38 ka BP, which is not observed in the trendless EASM record but is supported by records from northern and northwestern China. Orbital-scale climatic background of the global ice volume and precession could have caused the sub-orbital decoupling between the EASM circulation and regional rainfall in northern and northwestern China. Ice sheet advance during glaciation cools the northern high latitudes and forces the strengthening and southward movement of the westerly jet, while low precession causes the westward expansion of the Western Pacific Subtropical High. A strong westerly jet carries moisture from the Atlantic Ocean, encountering the moist water vapor from the Pacific Ocean, leading to the development of the frontal rain, and thus the high-precipitation period since 44 ka BP in northern and northwestern China. Therefore, local rainfall on the Chinese Loess Plateau generally couples with the EASM circulation on the millennial timescale, but decoupling could also occur due to the influence of other climatic subsystems, including the westerly jet and the Western Pacific Subtropical High, which are modulated by orbital-scale background conditions.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"375 ","pages":"Article 109802"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pleistocene geochemical signatures of the transgressive, overflow, and regressive phases of Lake Bonneville","authors":"B. Lee Drake ,&nbsp;Jennifer DeGraffenried ,&nbsp;Andrea Brunelle ,&nbsp;Isaac Hart ,&nbsp;Kaylee Barket Jones ,&nbsp;Bruce Kaiser ,&nbsp;Rachel Quist","doi":"10.1016/j.quascirev.2025.109775","DOIUrl":"10.1016/j.quascirev.2025.109775","url":null,"abstract":"<div><div>The rise and fall of Lake Bonneville at the end of the Pleistocene was driven by complex changes in North American hydrography. Using multiple sediment cores from Dugway Proving Grounds (DPG), we evaluate changes in composition from 30.0 to 13.0 cal ka BP ago using loss-on-ignition (LOI) and x-ray fluorescence (XRF) data. We find that the Stansbury Oscillation is associated with an increase in detrital inputs into the basin as evidenced by Ti/Ca, Rb/Sr, and Si/Ca ratios and coincided with Heinrich Event (HE) 2 around 24.0 cal ka BP. High lake level from 21.0 to 17.8 cal ka BP are associated with continued high influxes of sediment into the basin. However, an apparent punctuated drop in detrital proxy records was observed beginning at 17.8 cal ka BP with HE 1, lasting 500 years. This change was likely not due to changes in detrital inputs, but rather due to the overflow event at Red Rock Pass, which changed the Bonneville Basin from a closed to an open system. Detrital inputs remain high throughout the Provo stand from 17.0 to 16.0 cal ka BP, after which detrital inputs decline. From 16.0 to 15.0 cal ka BP, an increase in Mn abundance paired with a drop in organic content suggests a hypoxia episode. This was followed by a rapid evaporative event evidenced by higher aragonite and elevated Sr/Ca ratios at 14.5 cal ka BP which closely corresponds to the Bølling-Allerød interstadial period.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"375 ","pages":"Article 109775"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pollen-based reconstruction of Holocene vegetation dynamics and climate variability in northern Northeast China: Divergent hydroclimatic trends and possible westerly forcing","authors":"Sihan Sun ,&nbsp;Yukun Zheng ,&nbsp;Yong Luo ,&nbsp;Yue Yao ,&nbsp;Yue Wang ,&nbsp;Ying Cheng ,&nbsp;Yiyin Li ,&nbsp;Hongyan Liu","doi":"10.1016/j.quascirev.2026.109798","DOIUrl":"10.1016/j.quascirev.2026.109798","url":null,"abstract":"<div><div>Holocene vegetation and climate variability in Northeast China have attracted increasing attention in recent years. However, precise quantitative reconstructions remain limited, constraining a comprehensive understanding of regional environmental evolution and the underlying climatic mechanisms. In this study, we present a well-dated Holocene pollen record from Lake Daerbinluo, northern Northeast China. Vegetation dynamics were inferred using the biomization method, while mean annual temperature (<em>Tann</em>) and annual precipitation (<em>Pann</em>) were quantitatively reconstructed using a random forest approach. Our results reveal that a mosaic of forest and steppe dominated the region between 12,600 and 6200 Cal yr BP, transitioning to a temperate deciduous broadleaf forest as the dominant vegetation type after 6200 Cal yr BP. Climatic reconstructions show distinct trajectories for <em>Tann</em> and <em>Pann</em>. <em>Tann</em> exhibited a warming trend during the early Holocene, remained relatively high throughout the mid-Holocene, and experienced a slight decline during the late Holocene, broadly consistent with trends observed across the Northern Hemisphere. In contrast, <em>Pann</em> remained low but gradually increased prior to 5500 Cal yr BP, followed by an abrupt rise and sustained high levels during the mid to late Holocene, despite a minor decreasing tendency. These findings provide new insights into the climatic evolution and potential forcing mechanisms in Northeast China. The increased humidity during the mid-to late Holocene in our study area was likely driven by a strengthened westerly influence, despite the EASM remaining the principal moisture source, possibly via more frequent frontal cyclones and enhanced westerly moisture transport.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"375 ","pages":"Article 109798"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}