Quaternary Science Reviews最新文献

{"title":"Temporal variations in nitrogen isotope offsets between bulk sediment and planktonic foraminifera in the South China Sea linked to redox changes over the past 500 kyr","authors":"Li-Wei Zheng ,&nbsp;Yao Lai ,&nbsp;Xiaodong Ding ,&nbsp;Ehui Tan ,&nbsp;Xufeng Zheng ,&nbsp;Zhixiong Huang ,&nbsp;Zhenzhen Zheng ,&nbsp;Shuh-Ji Kao","doi":"10.1016/j.quascirev.2024.109169","DOIUrl":"10.1016/j.quascirev.2024.109169","url":null,"abstract":"<div><div>In the oligotrophic South China Sea (SCS), both nitrogen isotopes in bulk sediment (δ¹⁵N_TN) and co-deposited planktonic foraminifera tests (δ¹⁵N_FB) document the nitrate dynamics in the upper ocean, yet exhibit inconsistent temporal offsets (Δδ¹⁵N_TN-FB). This study investigates the potential drivers of these offsets, including terrigenous input, diagenetic effects on δ¹⁵N_TN, and interspecies isotope differences in δ¹⁵N_FB. By analyzing various nitrogen speciations in sediment core MD972142 from Southeastern SCS, we identified periodic variations in Δδ¹⁵N_TN-FB, ranging from −3 to +2‰ over the past 500 kyr, with negative offsets during glacial periods and positive during interglacial periods. Our findings suggest minimal influence from clay-fixed inorganic nitrogen, terrestrial organic nitrogen inputs, and interspecies differences among foraminifera. Instead, significant co-variation of Δδ¹⁵N_TN-FB with redox-sensitive manganese contents points to redox-driven degradation as the primary factor shaping these Δδ¹⁵N_TN-FB variations. Since sedimentary δ¹⁵N_FB is shielded from diagenetic alteration, it serves as a baseline indicator of initial δ¹⁵N of sinking particulate nitrogen (PN) at export, thus Δδ¹⁵N_TN-FB recording the relative changes in δ¹⁵N_TN caused by degradation from export to burial. To understand how this degradation influences Δδ¹⁵N_TN-FB, we synthesized modern observations of sinking PN in the SCS, revealing that δ¹⁵N of sinking PN consistently declines from the euphotic zone to constant, low values in deep water, illustrating negative isotopic offsets relative to initial export. As sinking PN undergoes further decomposition at the sediment-water interface—described by Rayleigh fractionation—it becomes isotopically enriched, potentially leading to positive offsets relative to initial export. Considering these patterns, we propose that interglacial sea-level rises improved water circulation coupled with low productivity, creating more oxic conditions that prolonged oxygen exposure and enhanced δ¹⁵N_TN enrichment, resulting in positive offsets of Δδ¹⁵N_TN-FB. Conversely, negative offsets occurred during glacial periods when lower sea levels reduced circulation and high productivity led to low-oxygen conditions and shorter oxygen exposure times.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"350 ","pages":"Article 109169"},"PeriodicalIF":3.2,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137128","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":"Human subsistence in a montane ecotone habitat during the Lower Magdalenian c. 19,000–18,000 years ago: The case of El Mirón cave (Cantabria, Spain)","authors":"Jeanne Marie Geiling ,&nbsp;Ana B. Marín-Arroyo ,&nbsp;Lawrence Guy Straus ,&nbsp;Manuel R. González Morales","doi":"10.1016/j.quascirev.2024.109133","DOIUrl":"10.1016/j.quascirev.2024.109133","url":null,"abstract":"<div><div>We reconstruct the subsistence strategies of foragers during the Cantabrian Lower Magdalenian (19.3–18ka cal BP) based on an extensive archaeofaunal assemblage from El Mirón Cave. The cave, situated in the montane interior of northern Atlantic Iberia, likely served as a repeatedly occupied, long-term residential base camp for mobile hunter-gatherers in the post-LGM period. The exploitation of ungulates was intensive and versatile, as evidenced by skinning, disarticulation, filleting cut marks, and impact marks on cancellous and long bones (for extraction of grease and marrow) from Spanish ibex and red deer. El Mirón Cave was an integral site in a Lower Magdalenian band territory centered on a major river valley in eastern Cantabria (the Asón), serving both logistical and residential purposes (sensu L.R. Binford). Our detailed multifactorial analysis of animal remains from a complex palimpsest accumulation (so typical of the Cantabrian Lower Magdalenian at classic coastal zone sites such as Altamira, El Juyo, or El Castillo) provides valuable insights into the specific subsistence and settlement dynamics of hunter-gatherers in the Cantabrian mountains during the post-LGM period when there is genetic evidence for important human population changes in Western Europe.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"350 ","pages":"Article 109133"},"PeriodicalIF":3.2,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136569","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":"Late Quaternary aeolian deposits in the southeastern Mu Us Sandy Land: Insights into the provenance of Asian dust and interpretation of dust records","authors":"Jie Chen ,&nbsp;Mingrui Qiang ,&nbsp;Xiaowei Wang ,&nbsp;Jinming Xie","doi":"10.1016/j.quascirev.2024.109168","DOIUrl":"10.1016/j.quascirev.2024.109168","url":null,"abstract":"<div><div>Chinese loess deposits are one of the most important terrestrial archives for understanding past climate change and global atmospheric circulation. However, the nature of loess deposition and the processes involved in it are not fully understood, limiting interpretations of the environmental significance of proxies applied to both loess deposits and distal dust records. On the basis of changes in lithostratigraphy and multiple proxies (grain size, magnetic susceptibility and weight loss-on-ignition), we investigated two outcropped sections in the transitional zone between the Mu Us Sandy Land (MUSL) and the Chinese Loess Plateau (CLP), attempting to depict the nature of aeolian deposition along the desert margins adjacent to the CLP and understand the dust dynamics that potentially affect typical loess deposition and long-range dust deposition from source areas to distal regions. The strata are mainly composed of alternating layers of loess, paleosol and aeolian sand, with obvious unconformities and abrupt grain size changes occurring at the transitions from loess/paleosol to sand deposition. The sand deposits interbedded with typical loess and/or paleosol suggest that proximal deserts have episodically expanded close to the study sites. Based on 15 luminescence dates, a comparison with other well-dated loess sections reveals the absence of strata in section Baijie between 132.5 and 105.7 ka may have resulted from aeolian erosion of previously deposited loess and paleosol during the late Marine Isotope Stage (MIS) 6 and MIS 5e. This erosion was most likely caused by an expansion of the MUSL during MIS 5d, as suggested by a well-sorted sand layer immediately overlying the loess deposition of MIS 6. The loess and/or paleosols previously deposited in upwind regions of the CLP have been partially eroded by winds, acting as a significant source for dust deposits downwind and resulting in dust flux peaks observed in distal marine sediments during MIS 5d. Such a linkage suggests the areas, which had belonged to the CLP and covered by typical loess but at present became a part of the MUSL, could serve as an additional source for dust deposition in the North Pacific during some intervals of the Quaternary. Our results provide insights into dust provenances for proximal Chinese loess and distal marine dust deposition, offering plausible interpretations on existing discrepancies of dust fluxes from different geological archives.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"350 ","pages":"Article 109168"},"PeriodicalIF":3.2,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137129","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":"Reconstructing the interactions between climate, fire, and vegetation dynamics during the Holocene, North Slave Region, Northwest Territories, Canada","authors":"Lauren V.R. Nesbitt ,&nbsp;Michael F.J. Pisaric ,&nbsp;Katrina A. Moser ,&nbsp;Kevin K.F. Ng ,&nbsp;Dorian M. Gaboriau ,&nbsp;Jason A. Lynch","doi":"10.1016/j.quascirev.2024.109158","DOIUrl":"10.1016/j.quascirev.2024.109158","url":null,"abstract":"<div><div>Local-scale fire regimes are controlled by climate, fuel availability, and topography. Research on long-term (i.e., Holocene timescales) fire activity in the Northwest Territories has focused on local fire dynamics, with fewer studies examining regional patterns. To investigate the impacts of climate variability on wildfire activity during the Holocene, 13 macroscopic charcoal and 3 pollen records, as well as insolation values, reconstructed temperatures, and precipitation data were analyzed to understand the interactions of climate, regional fire regimes and vegetation during the Holocene in the North Slave Region, Northwest Territories, Canada. Following deglaciation, wildfire activity across the region was low, due to lack of fuels, relatively low temperatures, and dry conditions. By ∼8200 cal yrs. BP, wildfire activity increased across the region as <em>Picea</em> expanded on the landscape increasing fuel availability and summer temperatures increased and peaked during the Holocene Thermal Maximum. Wildfire activity continued to increase throughout the mid-Holocene until cooler and wetter conditions developed with the onset of Neoglacial cooling around 4200 cal yrs. BP. With the onset of cooler and wetter conditions, wildfires declined regionally across the North Slave Region. The decline in wildfire activity following Neoglacial cooling can be attributed to a general decline in temperatures and changes in vegetations types and density. During the 20th century, wildfire activity increased in response to warming temperatures. With further increases in global mean temperature, it is expected that wildfire activity in the North Slave Region will increase during the 21st century.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"350 ","pages":"Article 109158"},"PeriodicalIF":3.2,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136570","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}

{"title":"Distinct latitudinal gradients define Holocene fire trends across the southeastern USA","authors":"Alexandra Tsalickis ,&nbsp;Richard S. Vachula ,&nbsp;Ambarish V. Karmalkar ,&nbsp;Nicholas L. Balascio ,&nbsp;Matthew N. Waters","doi":"10.1016/j.quascirev.2024.109161","DOIUrl":"10.1016/j.quascirev.2024.109161","url":null,"abstract":"<div><div>Fire is a keystone ecological process that shapes and maintains ecosystems in the southeastern United States, and yet the paleofire history of the southeast remains relatively understudied. In this study, we conducted an extensive literature review to identify paleofire datasets in the region, and then compiled, normalized, and analyzed 15 records with varied temporal lengths. We compared these data to climate parameters from transient paleoclimate model simulations to examine the spatiotemporal variability of fire and to determine its climate drivers throughout the Holocene. Our findings are based on analyzing charcoal records in conjunction with modelled surface air temperature, precipitation, and burned area fraction during three specific time intervals: the early (12–7 ka), mid (7–4 ka), and late (4–0 ka) Holocene. We find that distinct latitudinal gradients define fire trends. We argue that precipitation is the primary factor controlling fire activity in the southeastern USA, as periods with the most pronounced trends in modelled burned area fraction correspond to times of reduced precipitation. Additionally, comparing modelled data across three southeastern regions (Southern Peninsula, Eastern Coastal Plain, and Inland) reveals that fire trends in the Southern Peninsula differ from those in the rest of the southeastern USA. A significant lack of paleofire and paleoclimate data in the southeastern USA compared to pollen-based vegetation reconstructions underscores the need for the development of new paleofire records in the region.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"350 ","pages":"Article 109161"},"PeriodicalIF":3.2,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137127","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":"Late Pleistocene-Holocene mammalian body size change in Jordan's Azraq Basin: A case for climate driven species distribution shifts","authors":"Louise Martin ,&nbsp;Joe Roe ,&nbsp;Lisa Yeomans","doi":"10.1016/j.quascirev.2024.109147","DOIUrl":"10.1016/j.quascirev.2024.109147","url":null,"abstract":"<div><div>Mammalian body size diminution across the Late Pleistocene-Early Holocene transition in the southern Levant has been much researched, with special focus on gazelle in Levantine Mediterranean zones. Explanations of body size diminutions in those cases include temperature increase and anthropogenic factors. This study examines body size shifts in three mammalian taxa – <em>Gazella</em> (gazelle), <em>Lepus</em> (hare) and <em>Vulpes</em> (fox) – between 24,000–7500 cal BP, in the steppic Azraq Basin of northeast Jordan. Osteometrics derive from 19 archaeological sites through the Late Pleistocene-Early Holocene sequence. We use a ‘Z-score’ index of relative body size, and time-series analyses, to track body size shifts. All three taxa show relatively larger body size in the Late Pleistocene compared to the Early Holocene, with smallest Late Pleistocene sizes seen between 12,000–11,500 cal BP, during the Younger Dryas. While gazelles and hare recover size in our Early Holocene samples, they both show smaller sizes after 9000 cal BP. Similarity in size trends leads us to reject the influence of anthropogenic factors alone, in favour of ecological and climatic factors.</div><div>We attribute the sharp size decrease in gazelles in the Late Neolithic, 9000–7500 cal BP, to inter-specific size change, and the addition of a smaller Arabian species better adapted to the warmer arid post 8.2 kya conditions. Patterns for fox, albeit on small sample sizes, also hint at species turnover but in the Late Pleistocene. For hare, we track size decrease between the Late Pleistocene and Early Holocene as possible intra-specific diminution. Combined results argue for mammalian taxa experiencing complex responses to shifting ecological conditions in the Late Pleistocene-Early Holocene. Body size trends in the Azraq Basin appear counter to the expectations of Bergmann's rule of thermoregulation. We propose instead that forage conditions, and resource availability and limitations are better fit drivers of mammalian body size adaptations and turnover (including species distribution shifts) in this semi-arid case study region.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"350 ","pages":"Article 109147"},"PeriodicalIF":3.2,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137030","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}

{"title":"From teeth to seasons: Integrated analysis on ungulate game applied to two late Neanderthals’ contexts in the Italian Alps","authors":"Alessandra Livraghi ,&nbsp;Florent Rivals ,&nbsp;Diana Marcazzan ,&nbsp;Marco Peresani","doi":"10.1016/j.quascirev.2024.109160","DOIUrl":"10.1016/j.quascirev.2024.109160","url":null,"abstract":"<div><div>Human-environment interactions and spatio-temporal organization of the activities are of prime importance to decipher Paleolithic way of life. To address this topic, ungulates teeth offer a valuable tool to understand seasonality and extent of site occupation. In this paper, we present the results of the integrated application of two methodologies, dental wear analyses and cementochronology, to molars from cervids (<em>Capreolus capreolus</em>, <em>Cervus elaphus</em> and <em>Megaloceros giganteus</em>) exploited by the Neanderthal groups at Fumane Cave, in the Italian eastern Alps. By focusing on the diet-related meso- and microwear patterns on the teeth's occlusal surface and comparing them with samples from extant ungulates, dental wear analyses characterized the main exploited taxa as browser. This finding carries significant implications for understanding both the paleoenvironmental conditions of the area and Neanderthal subsistence strategy. Notably, the results align with the idea that the Italian peninsula served as a refugium during particularly harsh climatic periods. Moreover, the microwear signal yielded promising results in determining the duration of site occupation and cementum analysis sheds light on seasonality of the human frequentation. These findings shed light on the complexity of animal resource management practiced by Neanderthal groups, highlighting the varied strategies they employed to exploit different taxa. Furthermore, the present study served as a crucial testing ground to assess the reliability of a new multi-proxies technique that integrates tooth wear analyses and cementochronology. Combining cementochronology and dental wear analysis enhances data resolution by integrating two complementary approaches. Cementochronology allows us to determine the exact season of death, which is often challenging to ascertain solely from microwear analysis – especially when the variability in microwear signals is low. On the other hand, dental wear analysis provides insights both into the functional aspects of teeth over time and into the duration of the mortality event (i.e. the hunting event in anthropogenic contexts). This combined approach allowed us to double-check and validate the results and obtain higher resolution data, overcoming potential gaps in information that may arise from relying on a single technique.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"350 ","pages":"Article 109160"},"PeriodicalIF":3.2,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136574","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":"Assessing the suitability of pollen dispersal and deposition model: A model-empirical data comparison study in the spruce (Picea schrenkiana) forest edge of Tian Shan Mountains, northwestern China","authors":"Yiman Fang ,&nbsp;Xiaoping Yang ,&nbsp;Yongtao Zhao ,&nbsp;Yuan Li ,&nbsp;Chunmei Ma ,&nbsp;Bo Chen ,&nbsp;M. Jane Bunting","doi":"10.1016/j.quascirev.2024.109151","DOIUrl":"10.1016/j.quascirev.2024.109151","url":null,"abstract":"<div><div>Montane ecotones such as the forest-steppe transition are highly sensitive and responsive to climate change. Thus, reconstructing changing ecotone position is a valuable tool for reconstructing past climate change in mountainous regions, although identifying this from the pollen record can be challenging. Mathematical models of the pollen-vegetation relationships can be used to explore the detectability thresholds for ecotones, and the reliability of these reconstructions depends considerably on the suitability of the pollen dispersal and deposition models used. In this study, we compared pollen assemblages collected across the forest-steppe ecotone in the Tian Shan Mountains with predictions of a selection of pollen dispersal and deposition models as a test of whether they are appropriate to be used in mountainous regions. The modern pollen spectra show clear association with the local vegetation communities. <em>Picea</em> pollen dominate in the samples from the spruce forest, remain relatively high within hundreds of meters from the forest edge, and drop to background level (0.8% on average) by 1 km away from the forest edge. Both the log₂(<em>z</em>) model and the <em>z</em>⁻¹ model (z = distance from forest edge) performed well at simulating these changes, suggesting that although they do not incorporate topographic variations, these models can still be used with confidence to explore and to reconstruct past changes in the position of this ecotone at least over the Holocene.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"350 ","pages":"Article 109151"},"PeriodicalIF":3.2,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136573","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":"Simulation of gully evolution of Linzhou ancient city on the loess plateau in the past two millennia based on CA model","authors":"Yuehong Li ,&nbsp;Xiaohui Jiang ,&nbsp;Xingchi Chen ,&nbsp;Tong Nie ,&nbsp;Yuxin Lei ,&nbsp;Xiang Su ,&nbsp;Sinuo Fan ,&nbsp;Congcong Liu","doi":"10.1016/j.quascirev.2024.109167","DOIUrl":"10.1016/j.quascirev.2024.109167","url":null,"abstract":"<div><div>The Loess Plateau is a prominent locus of soil erosion in China, drawing considerable scrutiny owing to its pervasive gully erosion. Insufficient historical data have constrained the study of past dynamic changes in gully erosion. In this study, we employed a cellular automata (CA) model to simulate and analyze the progression of gully erosion near Linzhou Ancient City on the Loess Plateau, spanning two millennia. The results of the study show that, (1) the erosion rate of Linzhou Ancient City has been in the range of 7–27 mm/a over the past two millennia, with a general upward trend in gully erosion. (2) Factors such as climate, population, land use, and vegetation jointly affect the rate of gully erosion. (3) Accelerated gully erosion has contributed to the abandonment of Linzhou Ancient City. This study provides an essential reference for understanding the evolutionary processes of landforms on the Loess Plateau, revealing the combined influence of natural changes and human activities on gully development. Therefore, it is important to develop and implement soil and water conservation measures on the Loess Plateau.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"350 ","pages":"Article 109167"},"PeriodicalIF":3.2,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136572","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":"A high-resolution multiproxy speleothem record of Eastern China hydroclimate variation during last glacial maximum","authors":"Shuyu Xue ,&nbsp;Hongbin Zhang ,&nbsp;Michael L. Griffiths ,&nbsp;Chengfei He ,&nbsp;Yitao Liu ,&nbsp;Junhua Huang ,&nbsp;Hai Cheng ,&nbsp;Wei Guo ,&nbsp;Shitou Wu ,&nbsp;Jianzong Zhou ,&nbsp;Youfeng Ning ,&nbsp;Lin Chen ,&nbsp;Canfa Wang ,&nbsp;Zongmin Zhu ,&nbsp;Shucheng Xie","doi":"10.1016/j.quascirev.2024.109152","DOIUrl":"10.1016/j.quascirev.2024.109152","url":null,"abstract":"<div><div>The Last Glacial Maximum (LGM, 23-19 ka BP), marked by the greatest global ice volume expansion and lowest sea level during the last glacial period, is a critical epoch for comprehending historical climate variability. It has been extensively utilized as a reference point for assessing abrupt glacial climate shifts and the underlying external influences in climate model simulations. Although numerous proxies have advanced our comprehension of the LGM global climate, the evolution of LGM hydroclimate in densely populated monsoonal eastern China remains ambiguous, mainly due to complicated rainfall patterns and limited hydroclimate records. To address this shortcoming, here we present a high-resolution multiproxy speleothem record depicting the evolution of hydroclimate in central China spanning from 30 to 18 ka BP. Our hydroclimate proxies (δ¹³C and Mg/Ca), combined with other terrestrial records in eastern China, reveal a wet central southern China during the LGM while a dry northern China. The iTraCE simulation further revealed positive summer (JJA) and winter (DJF) net precipitation contributions in central southern China during the LGM, linked with orbital forcing and enhanced exposure of the low-latitude continental shelves. Our record also identifies a ∼400-year hydroclimate cycle during the late LGM, which is similar to the Atlantic Meridional Overturning Circulation (AMOC) variations, indicating a strong coupling between East Asian hydroclimate and high-latitude climate via atmospheric and oceanic teleconnections on a centennial scale.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"350 ","pages":"Article 109152"},"PeriodicalIF":3.2,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136498","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}