Quaternary Science Reviews最新文献

{"title":"Ice-sheet burial and erosion inferred from cosmogenic nuclide bedrock depth profiles: Implications for the glaciation history of northeastern Fennoscandia","authors":"Jane L. Andersen ,&nbsp;Mads F. Knudsen ,&nbsp;A.P. Stroeven ,&nbsp;Jesper Olsen ,&nbsp;Vivi K. Pedersen","doi":"10.1016/j.quascirev.2024.109010","DOIUrl":"10.1016/j.quascirev.2024.109010","url":null,"abstract":"<div><div>In this study, we evaluate the application of shallow (&lt;2.5 m) cosmogenic depth profiles in bedrock to constrain long-term ice-burial and erosion histories. Using Markov Chain Monte Carlo inversion modelling on a series of synthetic scenarios, we demonstrate that cosmogenic ¹⁰Be and ²⁶Al profiles provide more robust constraints on ice-burial duration and erosion histories than surface samples alone, particularly when erosion rates are low (&lt;5–10 m Myr⁻¹) and/or non-steady. We apply this method to new depth profiles of ¹⁰Be and ²⁶Al measurements from two tors in the Parkajoki region in northeastern Sweden. Our results indicate erosion depths of ∼2–10 m and ice burial for ∼20–35% of the time since 500 ka. These estimates imply more erosion and less ice burial than previously inferred from the same tors. However, by re-assessing the extent of ice cover during the Weichselian from existing records, we show that some cosmogenic nuclide inheritance predates the penultimate glacial maximum (Late Saalian), implying limited glacial erosion in the Parkajoki region during the last glacial cycle.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"344 ","pages":"Article 109010"},"PeriodicalIF":3.2,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530721","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":"Comparing the evolution of debris-free and debris-covered glaciers during the end of the Lateglacial and the Holocene in Dudh Koshi basin, Everest region, Nepal","authors":"Vincent Jomelli ,&nbsp;Patrick Wagnon ,&nbsp;Joanna Charton ,&nbsp;Régis Braucher ,&nbsp;Leo Martin ,&nbsp;Irene Schimmelpfennig ,&nbsp;Didier Swingedouw ,&nbsp;Deborah Verfaillie ,&nbsp;Fanny Brun ,&nbsp;Stephanie Gairoard ,&nbsp;Dibas Shrestha","doi":"10.1016/j.quascirev.2024.108994","DOIUrl":"10.1016/j.quascirev.2024.108994","url":null,"abstract":"<div><div>Debris-covered glaciers are very frequent geomorphological features in Khumbu Himal (Nepal). Rock debris on the glacier surface play a significant role in glacier-climate relationships and glacier dynamics. These effects may cause an asynchronous evolution of debris-covered glaciers compared to debris-free glaciers at a multicentennial to millennial scale. Here, we explore this hypothesis by documenting and comparing the multi-millennial Holocene evolution of a debris-free glacier, Sabai glacier, and two debris-covered glaciers, Dig and Huuku glaciers, from adjacent catchments in Dudh Koshi basin (Everest region, Nepal). To do so, we dated rock samples collected from moraine boulders on both debris-covered and debris-free glaciers using the ¹⁰Be cosmic ray exposure (CRE) dating method. ¹⁰Be CRE ages obtained from 41 moraine boulder samples provide time constraints from ∼13.5 ka to 0.1 ka. While at Dig (debris-covered) and Sabai (debris-free) glaciers, no moraines from the Lateglacial and the Early Holocene are preserved, debris-covered Huuku glacier evidenced a large glacier extent during the Bølling-Allerød and Early Holocene with two moraines dated respectively to ∼13.5 ka and 11 ka, synchronously with most debris-free and debris-covered glaciers in this region. These two glacier advances are concomitant with enhanced monsoon precipitation supporting a qualitative relationship. The absence of debris landforms in the main valley question the nature of Huuku glacier during the Bølling-Allerød and Early Holocene, which could have been either debris-free or covered by a thin debris layer only. During the Mid Holocene, significant differences are observed in the evolution of the two glacier types. The two debris-covered glaciers recorded a significant advance at ∼4.8 ka, synchronous with that observed on other debris-covered glaciers in Khumbu valley. However, such glacier advance during the Mid Holocene was not evidenced on debris-free glaciers in the Dudh Koshi valley. Such a Mid Holocene glacier advance may have a spatial signature with frequent cases reported from both types of glaciers in the western part of High Mountain Asia, which are however infrequent in the arid and semi-arid southern and north-eastern Tibet. During the Late Holocene, both types of glaciers evolved similarly again, with moraines spanning the last two millennia, including the Little Ice Age, concomitant with enhanced monsoon precipitation.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"344 ","pages":"Article 108994"},"PeriodicalIF":3.2,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530652","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 origin of the ice-free areas of the Hurd Peninsula (Livingston Island, Antarctica)","authors":"Marc Oliva ,&nbsp;David Palacios ,&nbsp;Leopoldo G. Sancho ,&nbsp;José M. Fernández-Fernández ,&nbsp;Attila Çiner ,&nbsp;Marcelo Fernandes ,&nbsp;Julia García-Oteyza ,&nbsp;M. Akif Sarıkaya ,&nbsp;Enrique Serrano ,&nbsp;Amaneh Kaveh-Firouz ,&nbsp;Augusto Pérez-Alberti ,&nbsp;Irene Schimmelpfennig ,&nbsp;Gonçalo Vieira ,&nbsp;Josep Bonsoms ,&nbsp;Dermot Antoniades ,&nbsp;ASTER Team","doi":"10.1016/j.quascirev.2024.108991","DOIUrl":"10.1016/j.quascirev.2024.108991","url":null,"abstract":"<div><div>Spatio-temporal patterns of glacial retreat determine the intensity of geomorphological, hydrological, and ecological processes in the ice-free areas of the Antarctic Peninsula region. The chronology of glacial oscillations in the region following the Last Glacial Maximum (LGM) is still poorly constrained and mostly limited to data from a few sites adjacent to research stations. The Hurd Peninsula, located on Livingston Island (South Shetland Islands), is mainly covered by the Hurd Peninsula Ice Cap (HPIC); there is a ca. 20 km² ice-free area downvalley of the ice cap in the peninsula's southern sector in addition to numerous nunataks that protrude above the HPIC. In this study, we present an approach combining two direct surface exposure dating methods, cosmic-ray exposure (CRE) dating and lichenometry, to reconstruct the spatio-temporal patterns of glacial thinning and ice cap retreat on the Hurd Peninsula. To understand the patterns of deglaciation on the peninsula, 26 samples for CRE dating (<em>in situ</em> cosmogenic ¹⁰Be) were taken from glacially polished surfaces and moraine boulders along a transect from the nunatak summits to the coast. On the most recent moraines, boulder stabilisation (i.e., indicative of glacier withdrawal) was dated through the longest axis of the 10 largest thalli of the lichen species <em>Rhizocarpon geographicum</em>. Ice thinning might have begun before the LGM at ca. 31.6 ka, when the highest areas close to the coast became exposed, and subsequently accelerated during the LGM at 20-18 ka. The upper surfaces were completely deglaciated between 16 and 14 ka. The HPIC was relatively stable until the mid-Holocene, when neoglacial advances of its outlet glaciers built moraines at ca. 4.5 ka. Subsequently, late Holocene polygenic moraines formed before the development of the external ridges of the most recent moraine system left by the HPIC outlets during the Little Ice Age, at 0.3 ka. The internal moraines correspond to glacial advances from the late 19th and early 20th centuries, as indicated by lichenometric dating. This work presents a comprehensive chronology of glacial oscillations on the Hurd Peninsula, enhancing our understanding of deglaciation patterns and offering insights into glacier dynamics due to climate variability and change.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"344 ","pages":"Article 108991"},"PeriodicalIF":3.2,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530723","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":"Sedimentary response of the Po Basin to Mid-Late Pleistocene glacio-eustatic oscillations","authors":"Luigi Bruno ,&nbsp;Luca Demurtas ,&nbsp;Donatella Magri ,&nbsp;Fabrizio Michelangeli ,&nbsp;Tammy Rittenour ,&nbsp;Wan Hong ,&nbsp;Veronica Rossi ,&nbsp;Stefano Claudio Vaiani ,&nbsp;Amanda Vecchi ,&nbsp;Alessandro Amorosi","doi":"10.1016/j.quascirev.2024.109005","DOIUrl":"10.1016/j.quascirev.2024.109005","url":null,"abstract":"<div><div>The Middle and Late Pleistocene were characterized by high-amplitude climate and sea-level oscillations that deeply influenced the evolution of alluvial and coastal systems worldwide. Through the correlation of 43 cores and 168 well data, with the aid of pollen, meiofauna, ¹⁴C, ESR and IRSL data, this work provides a detailed reconstruction of the Middle Pleistocene to Holocene stratigraphy of the Po Basin and explores the sedimentary response of the Po-Adriatic alluvial-coastal system to glacio-eustatic oscillations and other concomitant forcing factors.</div><div>The Middle Pleistocene to Holocene sedimentary succession of the Po Basin is composed of alluvial, paralic, coastal and shallow-marine facies associations arranged in an overall shallowing-upward trend. This general trend is punctuated by the rhythmical alternation of progradationally stacked coastal wedges with thick alluvial deposits. At landward locations, where the coastal facies wedge out, the depositional cyclicity records alternating paralic and alluvial facies associations. The overall shallowing-upward trend documents the longer-term, progressive filling of the basin driven by high sediment supply which overcame the rate of creation of accommodation induced by subsidence. The cyclic arrangement of facies, paralleled by rhythmical changes in vegetation, reflects Milankovitch-scale, glacio-eustatic oscillations in the 100 ka band. Increasing subsidence towards the sea and the activity of selected sectors of the buried Apennine thrust front, might have enhanced the seaward migration of coastal wedges.</div><div>This study provides clues on the sedimentary response of a low-gradient coastal system to dramatic climatic and eustatic changes. The model of basin evolution presented here may help predict the environmental modifications of coastal areas in near future scenarios of climate and sea-level change.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"344 ","pages":"Article 109005"},"PeriodicalIF":3.2,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530653","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":"Seesaw between the westerlies and Asian monsoon regulates vegetation and climate during the last deglaciation in southern Northeast China","authors":"Jian Wang ,&nbsp;Guilin Zhang ,&nbsp;Wenchao Zhang ,&nbsp;Xinying Zhou ,&nbsp;Junchi Liu ,&nbsp;Zeyang Zhu ,&nbsp;Yimin Yang ,&nbsp;Qingjiang Yang ,&nbsp;Keliang Zhao ,&nbsp;Xiaoqiang Li","doi":"10.1016/j.quascirev.2024.109008","DOIUrl":"10.1016/j.quascirev.2024.109008","url":null,"abstract":"<div><div>The history and drivers of hydroclimate changes during the last deglaciation in Northeast China remain contentious. We present a high-resolution record of vegetation and climate changes from Lake Buridun in southern Northeast China (SNEC), spanning the last ∼16 kyr. Multi-proxy reconstruction reveals a slight increase in precipitation prior to the end of Heinrich Stadial 1 (HS1) and forest development during the middle Bølling warming, indicating that hydrothermal conditions regulated regional vegetation. Significant fluctuations in all millennial-scale climatic events underscore the high sensitivity of SNEC to climate change. Our record aligns with high-resolution data from both SNEC and North China, showing a persistent wetting trend during the Bølling-Allerød period. This trend coincides with changes in East Asian summer monsoon intensity and Indo-Pacific warm pool heat content but contrasts with the Greenland temperature records. During the HS1 and Younger Dryas, records show a cold-dry mode in SNEC, contrasting with the cold-wet pattern in central-eastern China caused by the prolonged Meiyu season, which corresponds to the retreat of the monsoon precipitation belt and an enhanced westerly jet. Our data, along with more comprehensive records from broader regions, suggest that hydroclimate in SNEC was dominated by the low-latitude monsoon and the high-latitude westerlies during the warm and cold phases of the last deglaciation, exhibiting a seesaw-like interaction.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"344 ","pages":"Article 109008"},"PeriodicalIF":3.2,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530720","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":"Refining the chronology of Middle/Late Pleistocene fossil assemblages in the Argentine Pampas","authors":"Jose Luis Prado ,&nbsp;Mathieu Duval ,&nbsp;Martina Demuro ,&nbsp;Francisco Javier Santos-Arévalo ,&nbsp;María Teresa Alberdi ,&nbsp;Rodrigo L. Tomassini ,&nbsp;Claudia I. Montalvo ,&nbsp;Ricardo Bonini ,&nbsp;Cristian M. Favier-Dubois ,&nbsp;Sallie Burrough ,&nbsp;Szilvia Bajkan ,&nbsp;Germán M. Gasparini ,&nbsp;Jonathan Bellinzoni ,&nbsp;Fernando J. Fernández ,&nbsp;Sara García-Morato ,&nbsp;María Dolores Marin-Monfort ,&nbsp;Shaun Adams ,&nbsp;Jian-xin Zhao ,&nbsp;Elisa Beilinson ,&nbsp;Yolanda Fernández-Jalvo","doi":"10.1016/j.quascirev.2024.108958","DOIUrl":"10.1016/j.quascirev.2024.108958","url":null,"abstract":"<div><div>Middle and Late Pleistocene large and mega-mammal records of the Argentine Pampas, belonging to the Bonaerian and Lujanian Stages/Ages, have not yet been adequately dated by standard numerical radiometric methods. Reference timescales for Argentina and other South American fossil sites are mainly based on the mammalian faunal content (biostratigraphic units or biozones). We have recently dated three Middle and Late Pleistocene faunal sites located in the Buenos Aires Province using Electron Spin Resonance (ESR), U-series, Optically Stimulated Luminescence (OSL) and radiocarbon dating. The geographically distant sites (Salto de Piedra, Campo Spósito and Cascada de Paleolama) have yielded fossil assemblages representative of the Lujanian and Bonaerian Stages/Ages. Salto de Piedra, systematically excavated, records one of the most complete fossil sequences and our results indicate that it deposited between at least 127.4 ka (minimum age; Late Pleistocene, MIS 5) and 4.8–4.3 cal ka BP (Middle Holocene, MIS 1). Campo Spósito lower level (corresponding to ‘El Tala’ unit) was dated to &gt;188 ka via ESR/U-series dating of teeth. Finally, Cascada de Paleolama Unit D, towards the base of the sequence, produced an age of 143 ± 20 ka (Late Pleistocene, MIS 5/6). The new dating results provide a crucial additional age control for the Bonaerian and Lujanian Stages/Ages, and allowed us to better identify and calibrate the limits of <em>Equus neogeus, Megatherium americanum</em> biozones, as well as to better constrain other index taxa that are used to construct local biostratigraphical frameworks. Our results indicate the need for a revision of the biozone schemes established for the Quaternary of Pampean region.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"344 ","pages":"Article 108958"},"PeriodicalIF":3.2,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446988","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":"Corrigendum to ‘Late Pleistocene to Holocene alluvial deposits of the Inaouène Valley and their paleoenvironmental significance (north Morocco)’ [Quat. Sci. Rev. 344 (2024) 108941]","authors":"Mohammed Lghamour ,&nbsp;Lhoucine Karrat ,&nbsp;Vincenzo Picotti ,&nbsp;Irka Hajdas ,&nbsp;Negar Haghipour ,&nbsp;Giulia Guidobaldi ,&nbsp;Karin Wyss Heeb ,&nbsp;Lahcen Gourari","doi":"10.1016/j.quascirev.2024.109007","DOIUrl":"10.1016/j.quascirev.2024.109007","url":null,"abstract":"","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"344 ","pages":"Article 109007"},"PeriodicalIF":3.2,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446909","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":"Earliest direct evidence of horse husbandry and essential social network for sacrificial rituals during the Western Zhou Dynasty in China","authors":"Huiping Cai ,&nbsp;Qiang Ma ,&nbsp;Mengling Gao ,&nbsp;Yaowu Hu","doi":"10.1016/j.quascirev.2024.108997","DOIUrl":"10.1016/j.quascirev.2024.108997","url":null,"abstract":"<div><div>Horses were initially managed and domesticated in Central Asia during the Neolithic period for their utilization as a source of sustenance and transportation. Subsequently, they came to symbolize the elevated status of individuals when interred alongside elites in nomadic cultures during the Bronze Age in the eastern Eurasian Steppe. This practice was also adopted in China and became an indispensable component of Zhou rituals, with its origins dating back to the Late Shang Dynasty and subsequently spreading throughout the Western Zhou Dynasty. The understanding of horse management for sacrificial purposes after its introduction to China remains limited. In this study, we present isotopic data (<em>δ</em>¹³C, <em>δ</em>¹⁵N, <em>δ</em>³⁴S, <em>δ</em>¹⁸O) and ¹⁴C-dating results obtained from equine bones discovered at the Yaoheyuan site in Ningxia, China, which served as a vassal state attached to Western Zhou. The dating analysis reveals that horses lived during the period of 1203 BC∼821 BC (2σ, 95.4%), within the chorological range of the early to middle Western Zhou Dynasty generally. The multi-isotope analysis demonstrates that sacrificial horses exhibited diverse dietary patterns and originated from various regions, highlighting how burial owners held dominant authority over valuable equine resources. Similar patterns of horse management can be observed across other sites in China during both the Bronze Age and Iron Age periods as well as within the eastern Eurasian Steppe region. This suggests that horse sacrificial ritual originated from this steppe region but became localized within Chinese culture upon its introduction to China and eventually turned into an intrinsic characteristic of Zhou ritual practices. Sustaining such widespread adoption of this ritual throughout Western Zhou period required a continuous social network, including a self-sustained system to raise horse locally and an imported system to obtain horses in the steppe by wars, tributes, or trade exchange. Our study offers the earliest direct evidence of the ceremonial handling of equine sacrifices and the crucial social network during the Western Zhou Dynasty, enhancing our comprehension of cultural exchange between the eastern Eurasian Steppe and China.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"344 ","pages":"Article 108997"},"PeriodicalIF":3.2,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446987","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":"Imprints of Atlantic Multidecadal Oscillation on pantropical seawater pH inferred from coral δ11B records","authors":"Huiling Kang ,&nbsp;Xuefei Chen ,&nbsp;Wenfeng Deng ,&nbsp;Tianyu Chen ,&nbsp;Guanqiang Cai ,&nbsp;Gangjian Wei","doi":"10.1016/j.quascirev.2024.109003","DOIUrl":"10.1016/j.quascirev.2024.109003","url":null,"abstract":"<div><div>Understanding natural variability in seawater pH (pH_sw) is crucial for predicting future ocean acidification. Coral boron isotopes (δ¹¹B) offer an alternative method to extend pH_sw records back centuries, shedding light on how pH_sw varies over time. This study compiles both new and existing coral δ¹¹B records from pantropical oceans to investigate multidecadal pH_sw variability and its connection to climate variability. A notable finding is the pronounced influence of the Atlantic Multidecadal Oscillation (AMO) on pantropical coral δ¹¹B-pH variations. This is primarily interpreted as the effects of AMO-associated climate changes on reef pH_sw, rather than influencing coral physiological processes related to calcifying fluid pH. Key factors like wind speeds and hydrological variability related to Intertropical Convergence Zone (ITCZ) shifts are identified as potential drivers of the AMO's impact on pH_sw. This study thus provides valuable insights into the broader effects of the Atlantic climate on pantropical seawater CO₂ system.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"344 ","pages":"Article 109003"},"PeriodicalIF":3.2,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446906","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":"Precipitation variability and environmental change across late Quaternary glacial-interglacial cycles in lowland Central America: Insights from Lake Petén Itzá (Guatemala) sediments","authors":"Rodrigo Martínez-Abarca ,&nbsp;Liseth Pérez ,&nbsp;Thorsten Bauersachs ,&nbsp;Frederik Schenk ,&nbsp;Steffen Kutterolf ,&nbsp;Mark Brenner ,&nbsp;Thomas Guilderson ,&nbsp;Alex Correa-Metrio ,&nbsp;Flavio S. Anselmetti ,&nbsp;Robert Brown ,&nbsp;Daniel Ariztegui ,&nbsp;Laura Macario-González ,&nbsp;Esmeralda Cruz-Silva ,&nbsp;Juan Carlos Beltran-Martinez ,&nbsp;Mark Bush ,&nbsp;Mona Stockhecke ,&nbsp;Jason Curtis ,&nbsp;Antje Schwalb","doi":"10.1016/j.quascirev.2024.108985","DOIUrl":"10.1016/j.quascirev.2024.108985","url":null,"abstract":"<div><div>Lowland Central America, a biodiversity hotspot in the northern Neotropics, is a region where the climate is influenced by the location and expansion-contraction of the Intertropical Convergence Zone (ITCZ) on seasonal to millennial timescales. Paleo-records from the Caribbean Sea and the eastern equatorial and subtropical Pacific Ocean illustrate the response of regional precipitation to fluctuations in global temperature, driven by glacial-interglacial cyclicity over the past 500 kyr. Here, we present a paleoclimate and paleoenvironment record from Lake Petén Itzá, lowland Guatemala, which spans the last ∼413 kyr. Sediment in the lake recorded lacustrine and terrestrial ecosystem responses to large-scale climate variability. Precipitation patterns during MIS11-9 (∼413-304 ka BP) align with the latitudinal position of the ITCZ, with superimposed effects from the strength of the Caribbean Low-Level Jet (CLLJ). A sediment hiatus, likely attributable to mass removal processes in the lake's shallower areas, spans the period from MIS8 (starting at 304 ka BP) to the end of MIS6 (at 149 ka BP). MIS6 was characterized by humid conditions, perhaps ascribable to a more southerly extension of cold fronts and intensification of the CLLJ. During MIS5, pronounced fluctuations among all sediment variables, accompanied by an abrupt decline in precipitation, may correspond with cold events inferred from North Atlantic Ocean sediment cores. Although discontinuous, the Lake Petén Itzá sediment record provides a window into late Quaternary climate and environmental change in lowland Central America.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"344 ","pages":"Article 108985"},"PeriodicalIF":3.2,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446989","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}