Quaternary Science Reviews最新文献

{"title":"A 1700-year peatland-based hydroclimate record from the Hengduan Mountains in the southeastern Tibetan Plateau reveals changing dynamics of the summer monsoon interface","authors":"Yingfan Xia ,&nbsp;Zhengyu Xia ,&nbsp;Zicheng Yu","doi":"10.1016/j.quascirev.2025.109501","DOIUrl":"10.1016/j.quascirev.2025.109501","url":null,"abstract":"<div><div>The Indian summer monsoon (ISM) and the East Asian summer monsoon (EASM) affect precipitation patterns across the broad Asian continent. The southern Hengduan Mountains region in the southeastern Tibetan Plateau is located at the ISM–EASM interface, but how these two monsoon systems affect long-term regional precipitation variability remains unclear. Here, we develop a 1700-year record of centennial-scale hydroclimate variability from a rarely reported <em>Sphagnum</em>-dominated subalpine peatland in the southern Hengduan Mountains, using <em>Sphagnum</em>-specific cellulose δ¹³C and δ¹⁸O proxies that are supported by characterization of modern proxy–environment relationships.</div><div>Based on the modern variability of cellulose δ¹³C and δ¹⁸O in <em>Sphagnum</em> growth increments, we show that δ¹³C is a reliable proxy for moisture availability, following the “water film” mechanism. In contrast, δ¹⁸O is controlled by multiple mechanisms and can increase due to either higher precipitation δ¹⁸O and stronger evaporative enrichment under drier conditions or increased plant use of evaporated pool water caused by pool expansion under wetter conditions. Using the time-varying δ¹³C–δ¹⁸O correlation as a constraint, we infer from our coupled cellulose δ¹³C–δ¹⁸O records several centennial-scale moisture shifts, including wet shifts during 700–1200 CE, 1500–1800 CE, and after 1950 CE, and dry shifts during 300–700 CE, 1200–1500 CE, and 1800–1950 CE, with a generally wetter Medieval Warm Period than the Little Ice Age. The temporal pattern is consistent with previously published regional pollen-climate records but shows disparities from those lake-based terrestrial input records. Based on our novel single-stem isotope analysis, we hypothesize that the latter might be additionally affected by changes in extreme event characteristics.</div><div>We find that our new hydroclimate record shows an in-phase relationship with ISM records in the Indian subcontinent, except during 1500–1800 CE and in recent decades, during which our analysis presents evidence for an increased influence from EASM system. We attribute the transitions in large-scale hydroclimate patterns during these two periods to La Niña mean-state and anthropogenic radiative forcing, respectively, which weaken zonal wind flows over the Bay of Bengal—the key passage of the ISM. This study highlights the non-stationary relationship between hydroclimate and Asian summer monsoon dynamics at the ISM–EASM interface.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"366 ","pages":"Article 109501"},"PeriodicalIF":3.2,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144562835","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":"Proxy System Biases partially resolve long-standing paleoclimate data-model discrepancies in Tropical East Africa","authors":"Charlie Marshall ,&nbsp;Carrie Morrill ,&nbsp;Sylvia Dee ,&nbsp;Yueyang Jiang ,&nbsp;Sue Kim ,&nbsp;James Russell","doi":"10.1016/j.quascirev.2025.109426","DOIUrl":"10.1016/j.quascirev.2025.109426","url":null,"abstract":"<div><div>Paleoclimate data-model comparison is a vital tool for evaluating climate model performance and constraining predictions of climate change. Paleoclimate records provide an important out-of-sample target to test models in climates with different boundary conditions and improve model physics. General Circulation Models (GCMs) from the Paleoclimate Model Intercomparison Project (PMIP) underestimate temperature changes in tropical Africa during key periods in the past, calling into question model predictions of future climate change in this region. We compare a new suite of 8 temperature records from tropical African lakes derived from glycerol dialkyl glycerol tetraethers (GDGTs) to simulations of the Last Glacial Maximum (LGM, 21 kya) and mid-Holocene (MH, 6 kya) from PMIP3 and PMIP4, and find that there is significant proxy/model temperature disagreement during both periods; GCMs are over 2 °C cooler than proxies during the MH, and 2 °C warmer than proxies during the LGM. This could arise from issues with GCMs or the GDGT records. We use a proxy system model (PSM) to investigate multiple potential sources of proxy uncertainty, including non-stationarity in the relationship between air and lake temperature, seasonality, and calibration error. We find that proxy system error <em>can</em> account for significant portions of this discrepancy during the MH (up to 80%) assuming the maximum possible error for each potential source, but not during the LGM. Our findings highlight potential areas for improvement in interpretation of proxy records by explicitly modeling and quantifying uncertainty in reconstructed temperatures.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"366 ","pages":"Article 109426"},"PeriodicalIF":3.2,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144548393","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":"C3/C4 vegetation dynamics and hydroclimate variations in South China over the last two glacial-interglacial cycles","authors":"Xiaoyi Dong ,&nbsp;Huayu Lu ,&nbsp;Chenghong Liang ,&nbsp;Hongyan Zhang ,&nbsp;Michael Meadows ,&nbsp;Cheng Zhao ,&nbsp;Shuangwen Yi ,&nbsp;Yao Wang ,&nbsp;Yao Gu ,&nbsp;Fan Yang ,&nbsp;Fuzhi Lu","doi":"10.1016/j.quascirev.2025.109507","DOIUrl":"10.1016/j.quascirev.2025.109507","url":null,"abstract":"<div><div>The responses of climate and environment in the tropical-subtropical monsoon region of East Asia to both internal and external forcings remain poorly understood, largely due to the scarcity of high-resolution terrestrial records that span multiple glacial-interglacial cycles. In this study, we present an organic carbon isotope (δ¹³C_org) record from Tianyang maar lake in Guangdong Province, tropical South China, covering the past ∼250 kyr. This record reflects significant variations in the relative abundance of C₃ and C₄ biomass in the local terrestrial vegetation at orbital timescales, which we contend are primarily driven by changes in regional precipitation. Specifically, C₄ plants dominate in the drier climates of glacial periods, while C₃ plants thrive in the more humid conditions of interglacial periods. Superimposed on glacial-interglacial alternations, C₃/C₄ vegetation composition and associated precipitation exhibit high-frequency fluctuations, for which corresponding spectral analysis reveals prominent half-precession signals. This suggests a linkage between the ecosystem and hydroclimate dynamics in the study region and equatorial insolation at orbital timescales, with El Niño/Southern Oscillation (ENSO)-like variability possibly acting as a bridging mechanism. Our findings highlight the combined influence of glacial and low-latitude insolation forcings on terrestrial ecosystems and hydroclimate in tropical East Asia, thereby enhancing our understanding of the variability and forcing mechanisms of the East Asian Summer Monsoon (EASM) during the late Quaternary.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"366 ","pages":"Article 109507"},"PeriodicalIF":3.2,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144562836","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":"Early Pleistocene interglacial-glacial deposits in Denmark linked to the Matuyama Chron and MIS 22–21","authors":"Christian Kronborg ,&nbsp;Ole Bjørslev Nielsen ,&nbsp;Claus Beyer ,&nbsp;Erik Thomsen","doi":"10.1016/j.quascirev.2025.109502","DOIUrl":"10.1016/j.quascirev.2025.109502","url":null,"abstract":"<div><div>Middle Jutland, Denmark, holds some of the oldest Pleistocene deposits in northern Europe, both interglacial and glacial deposits are present. The interglacial deposits, recognized as the Harreskovian Interglacial, have traditionally been referred to the Cromerian Complex, but the reason for this assignment is unclear. It is, however, evident that the deposits are connected to the early expansion of the Scandinavian ice sheet onto the North European lowland. The scope of this paper is to examine and hopefully clarify some of these issues. The critical geological unit in the study is the Harreskovian Interglacial gyttja. This gyttja is overlain by two interstadial units, Ølgod I and Ølgod II, and underlain by totally 54 m of glacial deposits comprising five tills alternating with beds of meltwater sand. A closely related succession appears at Starup 45 km south of Harreskov, but here the glacial deposits below the interglacial sediments consist entirely of glacial lake clay. The glacial succession rests directly on Neogene sand. We have analysed 112 samples for palaeomagnetic polarity. The samples gave all reverse polarity except for the lowermost four samples at Starup, which showed normal polarity. Correlating our results with the Global Magnetic Polarity Time Scale (GMPTS) and the benthic Marine Isotope Stages (MIS), we assign the sedimentary successions as a whole to the reverse Matuyama Chron. The Harreskovian Interglacial and the two overlying interstadials are correlated to MIS 21, whereas the tills and meltwater sand are referred to MIS 22. The normal polarity samples at the base of the lacustrine clay at Starup are referred to the Kamikatsura normal excursion. We suggest that the tills represent the first advances of the Scandinavian Ice Sheet into Denmark. The advance probably stopped in the southern part of Jutland, as indicated by the lack of evidence for ice in Schleswig-Holstein and northern Germany.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"366 ","pages":"Article 109502"},"PeriodicalIF":3.2,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535680","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 megalake system in the Yinchuan-Hetao rifting basins, upper reaches of the Yellow River","authors":"Xiaobo Liu ,&nbsp;Cheng Quan ,&nbsp;Zhonghui Liu ,&nbsp;Rongxi Li","doi":"10.1016/j.quascirev.2025.109473","DOIUrl":"10.1016/j.quascirev.2025.109473","url":null,"abstract":"<div><div>Lacustrine paleoenvironment reconstructions integrating geomorphic and sedimentary archives yield critical insights into hydrologic variability across basins. The Yinchuan Basin (YCB) and Hetao Basin (HTB), large active rifting basins along the upper reaches of the Yellow River, are connected by the Wuhai broad valley (WBV). While the HTB was once occupied by \"Megalake Hetao\" (HTML) during the period from ∼100 ka to 60–50 ka, the coeval lacustrine histories of the YCB and WBV remain unclear. This study combines field investigations, optically stimulated luminescence (OSL) dating, and grain-size distribution (GSD) analyses to reconstruct the late Pleistocene paleoenvironmental conditions in the YCB and WBV. Our results reveal that lacustrine deposits in the WBV and YCB record two distinct phases of high lake levels during Marine Isotope Stage (MIS) 5–4. Rising lake levels in the YCB, HTB, and WBV coalesced to form a unified water body, designated as Megalake Yinchuan-Hetao. The first lake rise developed between ∼100 ka and 73 ka (MIS 5), facilitated by sustained low subsidence rates of basins coupled with elevated precipitation. An ephemeral lake-level drop at ∼73 ka exhibited temporal correlation with regional paleoseismic activity, potentially triggering dam breaching and lake-level drop. The second lake rise, spanning ∼73–67 ka (MIS 4), manifested under cooler climatic conditions, characterized by elevated sediment influx and contracted accommodation space of basins associated with persistent tectonic quiescence, ultimately culminating in lake spillover and drainage of lakes. These findings enhance our understanding of the broader hydrology and the evolutionary paleogeography of the upper reaches of the Yellow River, providing a case study on the tectonic and climatic factors that influenced paleolake formation within rifting basins in modern arid settings.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"365 ","pages":"Article 109473"},"PeriodicalIF":3.2,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535759","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 glacier-climate history of the Calluqueo glacier and Monte San Lorenzo, central Patagonia","authors":"Carly Peltier ,&nbsp;Michael R. Kaplan ,&nbsp;Rodrigo L. Soteres ,&nbsp;Juan-Carlos Aravena ,&nbsp;Esteban A. Sagredo ,&nbsp;Ally Peccia ,&nbsp;Gonzalo Amigo ,&nbsp;Roseanne Schwartz ,&nbsp;Joerg M. Schaefer","doi":"10.1016/j.quascirev.2025.109482","DOIUrl":"10.1016/j.quascirev.2025.109482","url":null,"abstract":"<div><div>We present 33 new ¹⁰Be exposure ages on boulders rooted in moraines in the Calluqueo valley in central Patagonia. The former glacier flowed westward off the Monte San Lorenzo massif and was expanded from ∼6,900 until ∼6,700 years ago; and at 5,620 ± 200, 5,140 ± 150, 4,660 ± 180, 4,100 ± 140, 3,610 ± 200, 3,120 ± 110 years ago (n=2 for these groups), and repeatedly during the last ∼600 years. Glaciers may have advanced earlier in the Holocene, but additional effort is needed to elucidate the timing. Also taking into account a record in the nearby Tranquillo Valley, we see that at Monte San Lorenzo glaciers were expanded often between ∼7 and ∼3 ka, and after ∼1.4 ka. During the middle Holocene moraines were built on average every ∼500 years. The largest expansions of the last millennium were at ∼1400–1500 CE. We also date boulders on the innermost moraine terrain to 1810 CE ± 20 and 1870 CE ± 20 years. A last phase of stability existed from ∼1800 to 1940 CE, with pronounced ongoing retreat since after 1940 CE.</div><div>The Monte San Lorenzo chronologies allow us to compare Holocene records between central and southernmost Patagonia. Throughout Patagonia, there is a similar glacier-climate history, with nested moraine sets and the largest glaciers generally in the mid-early Holocene. In most places, a marked change in glacier behavior and climate occurred around 7 ka, but some sites exhibit evidence of earlier Holocene activity. Over the last millennium, a net decrease in extent of advances occurred from ∼1400 to ∼1800 CE. However, there are some differences across Patagonia. In central Patagonia (∼44–49°S), glaciers expanded between 4 and 3 ka, while from 3 to 2 ka moraines are not preserved; the pattern appears reversed to the south (i.e. south of ∼49°S).</div><div>We hypothesize that Subantarctic or high latitude climates strongly impacted at least as far as northern Patagonia throughout the Holocene, including centennial and millennial changes in cold phases reflecting shifts in the Southern Hemisphere Westerlies and associated air masses. One exception perhaps is between 4 and 3 ka, where moraines are not observed to the south, possibly reflecting closer proximity to Antarctica where this interval may be generally warm. Regardless of secondary differences across southern South America, glacier records in central Patagonia are unlike those in the Northern Hemisphere, but similar to other records in the Southern Hemisphere. For comparison, anthropogenic climate change has caused climate, and thus glacier, behavior to be more in sync between the hemispheres, whereas longer-term Holocene records show distinct differences in histories even regionally within South America.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"366 ","pages":"Article 109482"},"PeriodicalIF":3.2,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535679","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":"Paleoseismic evidence for the Mw∼7 1857 earthquake along the Caggiano fault system (southern Italian Apennines)","authors":"Paolo Galli ,&nbsp;Simone Bello ,&nbsp;Francesco Brozzetti ,&nbsp;Antonio Galderisi ,&nbsp;Giuseppe Naso ,&nbsp;Antonio Pignalosa ,&nbsp;Gianluca Benedetti ,&nbsp;Massimo Comedini ,&nbsp;Edoardo Peronace","doi":"10.1016/j.quascirev.2025.109508","DOIUrl":"10.1016/j.quascirev.2025.109508","url":null,"abstract":"<div><div>The 1857 Campania-Basilicata earthquake in the southern Italian Apennines ranks among the most catastrophic events in Mediterranean history (Mw 7.1), with an estimated death toll ranging between 11,000 and 19,000. It consisted of a pair of mainshocks occurring within minutes of each other, affecting a vast region between the northern Vallo di Diano and the northern Agri Valley, two Quaternary intramontane basins separated by the Maddalena Range. The earthquakes were likely triggered by the cascading rupture of two adjacent, aligned normal faults, whose exact length and location are uncertain and debated, especially concerning the southern one. This study focuses on the northern normal fault, here named Caggiano fault system, which extends NW-SE for approximately 32 km across the Meso-Cenozoic carbonate of the Maddalena Range. After mapping the fault scarp using 1950s aerial photos and LiDAR-derived DTM, we conducted geological field survey of the entire fault traces, performing electrical resistivity tomography preparatory to paleoseismic trenching. Subsequently, we excavated trenches and pits, collecting numerous samples for radiocarbon dating. Results provide conclusive evidence of surface faulting to the post-Last Glacial Maximum-Holocene, indicating the Caggiano fault system as a reliable candidate for the 1857 earthquake, as well as earlier events, such as the one in 1561 and previously undocumented earthquakes in the Middle Age and Roman times. These findings represent a robust contribution to future seismic hazard assessments, which require reliable identification and seismogenic characterization of active fault systems.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"365 ","pages":"Article 109508"},"PeriodicalIF":3.2,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535760","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":"Testate amoebae as paleoenvironmental indicators in peatlands: calibration-dataset synthesis and assessment of modern analogues using the Neotoma Paleoecology Database","authors":"Robert K. Booth,&nbsp;Alexis Stansfield,&nbsp;Erica Cowper,&nbsp;Jared M. Kodero","doi":"10.1016/j.quascirev.2025.109491","DOIUrl":"10.1016/j.quascirev.2025.109491","url":null,"abstract":"<div><div>Testate amoebae are widely used paleoindicators of past environmental conditions, particularly in peatlands where they have been used as surface-moisture proxies. Modern ecological studies of the past several decades inform the interpretation of stratigraphic records, and increasingly both modern surface-sample datasets and stratigraphic records are being added to publicly available databases like the Neotoma Paleoecology Database. In this paper, we broadly synthesize results of calibration studies during the past ∼35 years, and then use data from the Neotoma Paleoecology Database to examine morphospecies-environment relationships in calibration datasets from the northern hemisphere and directly compare subfossil and modern testate amoeba communities to assess the strength of modern analogues for subfossil samples in North American stratigraphic records. Results confirm the consistent and central importance of surface-moisture in controlling testate amoeba communities in peatlands, with similar community-moisture relationships across the Northern Hemisphere. However, many subfossil communities have few good modern analogues, likely due to a combination of factors including differential decomposition of taxa extending beyond the well-documented poor preservation of weakly idiosomic tests. Many subfossil samples contain high abundances and unusual combinations of taxa that are not well represented in modern datasets, and the causes and implications of subfossil communities with poor modern analogues deserve greater attention by the research community. The Neotoma Paleoecology Database is a valuable shared resource, and its continued development will enable the examination of research questions focused on understanding the variability and structure of modern and subfossil testate amoeba communities, as well as moisture reconstructions in both time and space.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"366 ","pages":"Article 109491"},"PeriodicalIF":3.2,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517239","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":"Sedimentary architecture of the Brown Bank Formation (Dutch sector of the North Sea) reveals consecutive shallow marine depositional phases during the MIS 5-4 transition","authors":"Irene Waajen-Labee ,&nbsp;Ruth Plets ,&nbsp;Víctor Cartelle ,&nbsp;Marieke Cuperus ,&nbsp;Timme Donders ,&nbsp;Sytze van Heteren ,&nbsp;Thomas Mestdagh ,&nbsp;Friederike Wagner-Cremer ,&nbsp;Jakob Wallinga ,&nbsp;Frank Wesselingh ,&nbsp;Freek Busschers","doi":"10.1016/j.quascirev.2025.109442","DOIUrl":"10.1016/j.quascirev.2025.109442","url":null,"abstract":"<div><div>Major climate cooling transitions have large impacts on the evolution of sedimentary depositional systems of shelf seas and coastal areas. These transitions are rarely preserved because they are prone to erosion during subsequent lowstands or, if preserved, buried too deep to reach with standard ground-truthing methods. As result, the relation between climate cooling and these sedimentary systems is still poorly understood. Severe climate cooling occurred during the Late Pleistocene MIS 5-MIS 4 transition, as captured within the shallow marine deposits of the Brown Bank Formation (Fm), which occurs between 0.1 m and 40 m below the present southern North Sea floor. To improve our understanding of the character and complexity of the depositional system, as well as the environmental response during the rapid climate cooling it portrays, we map the hitherto poorly constrained extent and architecture of the Brown Bank Fm within part of the Dutch sector of the North Sea. We document and map four seismic facies units (BB1-BB4) that are attributed to variations in tidal energy and pro-deltaic sediment supply. Pollen, diatom and mollusc assemblages reveal that the palaeoenvironment remained shallow marine throughout deposition and provide evidence for two cooling phases. The pollen assemblage also indicates that during this period forests changed to open woodlands in this period. Linking the palaeoenvironmental data and new luminescence ages of the four units with the Greenland NGRIP δ¹⁸O_ice chronology, suggests that deposition of the units occurred during a relatively short time. The new analyses from the Brown Bank Fm suggest that the North Sea became disconnected from the Atlantic Ocean at its southern outlet (the Dover Strait) around the start of MIS 5a (ca. 88 ka) and that the floor of the southern North Sea became completely exposed around 72 ka.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"365 ","pages":"Article 109442"},"PeriodicalIF":3.2,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144490334","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":"Response of Alpine cave glaciation to millennial-scale climate variability during the last glacial period","authors":"Christoph Spötl ,&nbsp;Gabriella Koltai ,&nbsp;Tanguy Racine ,&nbsp;Haiwei Zhang ,&nbsp;Hai Cheng","doi":"10.1016/j.quascirev.2025.109490","DOIUrl":"10.1016/j.quascirev.2025.109490","url":null,"abstract":"<div><div>This study examines the response of Alpine cave glaciation to millennial-scale climate variability during the last glacial period, using cryogenic cave carbonates (CCC) as a paleoenvironmental archive. Focusing on the isolated homothermic Hochkogeltunnel gallery in Eisriesenwelt, a large cave in the Austrian Alps, we analyzed coarse-grained CCC (CCC-c) to reconstruct past cave temperatures and ice presence. ²³⁰Th dating reveals nine distinct phases of CCC-c formation over a period of 67 ka (77.9 ± 0.5 to 11.2 ± 0.5 ka BP), with most occurrences aligning with interstadial warming events recorded in Greenland ice cores and Alpine stalagmites. Thermal modeling suggests that rapid temperature increases during interstadials warmed this cave gallery to about −1 to 0 °C—the critical range of CCC formation—within approximately 56 yr–131 yr and remained at this temperature for about half a century. Since the model accounts only for conductive heat transfer, this represents a maximum time estimate, yet remains within the uncertainty of the ²³⁰Th ages. Our findings confirm that karst hydrology and cave microclimate and thus perennial cave ice responded sensitively to glacial-age climate fluctuations, highlighting the value of CCC-c as a high-resolution archive for past subsurface temperature variability.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"365 ","pages":"Article 109490"},"PeriodicalIF":3.2,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144501374","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}