Quaternary International最新文献

{"title":"Agriculture and Holocene deforestation in eastern China","authors":"John Dodson ,&nbsp;Xiaoqiang Li ,&nbsp;Menglin Song","doi":"10.1016/j.quaint.2024.03.008","DOIUrl":"https://doi.org/10.1016/j.quaint.2024.03.008","url":null,"abstract":"<div><p>Humans have had profound and environmentally changing impacts on land cover, and China has many examples of this. It has been recognised for some time that middle to late Holocene forests in China have undergone changes that are best described as due to human impacts. Hence the Holocene has seen sometimes gradual and sometimes abrupt changes from forest dynamics driven by natural forces to those dominated by human impacts. This leads to a conclusion that it is often difficult to disentangle natural and anthropogenic controls on forest composition. In many cases records show minor changes in the early Holocene giving way to intense changes as agriculture expanded. The two earliest centres of extensive forest changes from 6 to 5 kyr BP were in the middle to lower Yellow and lower Yangtze valleys, where millet and rice agriculture developed. Major forest clearing was later in other areas, including the Pearl River valley, Northeast China and Yunnan. Forest clearing for agriculture was widespread in eastern China by 2 kyr BP. Where data is available it seems that initial clearing took place in valleys adjacent to rivers, presumably because these were the preferred living places for early farmers. Then gradually spread to nearby slopes. New approaches and technologies were needed to achieve this. The records show that north east China, north of the Liao River, and the mountains of central China were amongst the last places to record forest clearing, in some cases just within the last few hundred years, or not at all.</p></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"691 ","pages":"Pages 1-7"},"PeriodicalIF":2.2,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140622276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Weak East Asian summer monsoon during the high atmospheric CO2 middle Pliocene period: Evidenced by red clay record on the Chinese Loess Plateau","authors":"Baiyu Wang ,&nbsp;Jia Jia ,&nbsp;Yijiao Fan ,&nbsp;Qiang Wang ,&nbsp;Qu Chen","doi":"10.1016/j.quaint.2024.03.007","DOIUrl":"10.1016/j.quaint.2024.03.007","url":null,"abstract":"<div><p>The mid-Pliocene warm period (MPWP) during 3.3–3.0 Ma has been defined as a potential analog for future climate warming with atmospheric CO₂ concentration higher than the modern level. However, the migration of the East Asian summer monsoon (EASM) rain belt during this period is still controversial, which hinders our understanding of the future environmental changes in China. Two periods, Pleistocene interglacials (with atmospheric CO₂ ∼280 ppmv) and mid-Pliocene (with atmospheric CO₂ ∼450 ppmv) were selected to study the changes of regional humidity and the EASM edge location as high CO₂ forcing. The results show a relatively drier and warmer climate prevails in the area and the edge of the EASM retreated eastward. Our study supports that the edge of the EASM will eastward retreat in the future and the CLP will get drier and warmer with increasing atmospheric CO₂ concentration can be expected.</p></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"692 ","pages":"Pages 21-27"},"PeriodicalIF":2.2,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140766794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geomorphological and geological characteristics reflecting the Holocene activity of the Dalangsonggou fault, eastern Tibetan Plateau","authors":"Mingjian Liang ,&nbsp;Feipeng Huang ,&nbsp;Hong Zuo ,&nbsp;Cheng Liao ,&nbsp;Weiwei Wu ,&nbsp;Kai Sun ,&nbsp;Yue Gong","doi":"10.1016/j.quaint.2024.03.012","DOIUrl":"10.1016/j.quaint.2024.03.012","url":null,"abstract":"<div><p>The Dalangsonggou (DLSG) fault is an internal fault within the Sichuan–Yunnan block, located on the southern side of the Garzê–Yushu fault. On the basis of geological and geomorphological surveys, we estimated the Holocene activity of the DLSG fault. We excavated two trenches and identified two paleoseismic events by analyzing the stratigraphic deformation and radiocarbon dating results of the faulted strata. The occurrence times of these events were determined to be 8420–8346 and 4612–5045 cal BP. The time elapsed since the latest earthquake, which exceeds 4500 years, indicates strong risk of occurrence of a large earthquake on the DLSG fault. Furthermore, the recurrence interval of large earthquakes on the DLSG fault is much longer than that of earthquakes on the Garzê–Yushu fault. Thus, the DLSG fault conducts only regulating effects in terms of regional tectonic deformation compared to the dominant impact of the Garzê–Yushu fault, which is a boundary fault of the block.</p></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"695 ","pages":"Pages 55-62"},"PeriodicalIF":2.2,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140785929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Holocene high-resolution paleoenvironmental reconstruction from Beaver Lake in the northwest lowlands of the Olympic Peninsula, Washington (USA)","authors":"","doi":"10.1016/j.quaint.2024.03.009","DOIUrl":"10.1016/j.quaint.2024.03.009","url":null,"abstract":"<div><p><span>Fire is an essential component of the landscapes and forests of the Pacific Northwest, including the temperate rainforests of the Olympic Peninsula. Previous fire history reconstructions from the peninsula show that fire return intervals varied throughout the </span>postglacial<span> period, primarily in response to climatic changes and corresponding shifts in vegetation. However, much less is known about the fire history of the low-elevation forests of the Olympic Peninsula and the role of cultural fire regimes in these environments. The purpose of this study was to reconstruct the paleoenvironmental history of a low-elevation study site, Beaver Lake, located in the northwestern part of the peninsula. Using macroscopic charcoal, pollen, and sedimentological analyses of a ca. 3440-year-long record, we reconstructed a high-resolution record that shows fire activity was remarkably high during the late Holocene<span> for an area considered part of a temperate rainforest. However, patterns of burning varied throughout the record, with the first third (ca. 3440 to 2350 cal yr BP) and last third (ca. 800 cal yr BP to the present day) recording much higher amounts of fire activity compared to the middle portion (ca. 2350 to 800 cal yr BP), which recorded very little fire activity. Larger and/or more severe fires that likely burned during multi-year droughts correlate with peaks in magnetic susceptibility and pollen trends that indicate substantial geomorphic responses and successional changes in forest structure following these events. Cooler temperatures and a wetter climate, indicated by nearby glacial advancements, may have staved off fire activity during the period of low fire activity. Cultural burning by the Indigenous tribes of the Olympic Peninsula likely contributed to the observed fire activity at Beaver Lake as nearby prairies were managed for resource procurement, indicated in particular by an increase in herbaceous morphotype charcoal during the past 800 years.</span></span></p></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"705 ","pages":"Pages 73-85"},"PeriodicalIF":1.9,"publicationDate":"2024-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140786922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermocline-level connectivity between the tropical equatorial Pacific and tropical northeast Pacific during deglaciation","authors":"","doi":"10.1016/j.quaint.2024.03.010","DOIUrl":"10.1016/j.quaint.2024.03.010","url":null,"abstract":"<div><p><span><span><span>The connection of the Southern Ocean<span> and Eastern Equatorial Pacific (EEP) has been used to explain the presence of an old, respired water mass into the Eastern Tropical North Pacific (ETNP) and Eastern North Pacific (ENP) during </span></span>deglaciation. This water mass and its geochemical properties are transported along the </span>thermocline via subsurface and intermediate circulation. Some questions remain regarding an intermediate water mass with old and less ventilated characteristics in the eastern Pacific because certain sedimentary records of δ</span>¹³C, δ¹⁸O, and Δ¹⁴<span>C in benthic foraminifera<span> have failed to prove its presence. The top-down hypothesis has been proposed to explain the absence of this carbon isotopic signal in benthic and its presence in planktonic foraminifera in the EEP. To prove this hypothesis in the ETNP, oxygen and carbon isotopic compositions were determined for </span></span><em>Neogloboquadrina dutertrei</em><span><span> in a core collected at 700 m depth over the Magdalena margin, Mexico. From these new data, a reconstruction of the water column structure and the change in ocean circulation at the </span>thermocline level during deglaciation was inferred. </span><em>N. dutertrei</em> δ¹⁸O values in the ETNP and those from <em>Globigerina bulloides</em> in the ENP, similar to those of <em>N. dutertrei</em> in the EEP, suggest that the tropical water mass extended as far as 32 °N. Specifically, <em>N. dutertrei</em> δ¹⁸<span>O values were more positive in the Heinrich Stadial-1 (HS-1) and Younger Dryas<span> (YD) than the Bolling<span> Allerod-Antarctic Cold Reversal (BA-ACR) and Early Holocene (EH) suggesting the presence of a saline water mass with origin in the EEP. </span></span></span><em>N. dutertrei</em> δ¹³C depleted values during the HS-1 and YD suggested the presence of a water mass with old and respired carbon. This is consistent with the salinification or “spicy” inferred from δ¹⁸O for the ETNP. These isotopic findings in <em>N. dutertrei</em> corroborate the existence of a tropical water mass that probably originated in the Southern Ocean. Additionally, the present data do not support the top-down hypothesis.</p></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"705 ","pages":"Pages 86-93"},"PeriodicalIF":1.9,"publicationDate":"2024-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140768769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the suitability of sedimentological, geochemical, and biological proxies for reconstructing floodplain palaeohydrology","authors":"Renske Hoevers ,&nbsp;Nils Broothaerts ,&nbsp;Ellen Jennen ,&nbsp;Ward Swinnen ,&nbsp;Gert Verstraeten","doi":"10.1016/j.quaint.2024.03.005","DOIUrl":"10.1016/j.quaint.2024.03.005","url":null,"abstract":"<div><p>Fundamental insight into the long-term ‘geoecohydrological’ dynamics of rivers and floodplains is required for their sustainable management. To study these dynamics, a multi-proxy approach is essential. While suitable proxies are available for reconstructing floodplain geomorphology and past vegetation, the suitability of the available proxies for past hydrology to reconstruct floodplain wetness has not yet been evaluated. In this study, we apply a multi-proxy analysis combining testate amoebae and several geochemical proxies for decomposition (humification, carbon and nitrogen stable isotopes), in comparison to sedimentological (stratigraphy, loss on ignition) and palaeobotanical records, to obtain independent hydrological reconstructions of alluvial floodplains in contrasting environmental settings to explore the suitability of the available proxies for past hydrology to reconstruct floodplain wetness.</p><p>This study concludes that testate amoebae cannot provide a continuous and reliable hydrological reconstruction, as they are insufficiently preserved in alluvial peat deposits. In addition, mineral particles within the tests size range hamper the analysis in mineral-dominated sediment units. As organic matter decomposition is low when water tables are high and vice versa, we expected the decomposition proxies to reflect the hydrological conditions. While the amount of humic acids appears to depend mainly on the substrate rather than the decomposition of the organic matter in it, the analyses of carbon and nitrogen stable isotopes provide promising results, for both peat and non-peat deposits.</p></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"693 ","pages":"Pages 1-17"},"PeriodicalIF":2.2,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140772834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New biostratigraphic and paleoecologic data on the Pliocene-Pleistocene paleogeographic evolution of the northeastern coastal area of the central Tyrrhenian sea (Italy)","authors":"Francesca Bulian ,&nbsp;Andrea Genesini ,&nbsp;Fabrizio Marra ,&nbsp;Daniele Scarponi ,&nbsp;Paola Vannoli","doi":"10.1016/j.quaint.2024.03.011","DOIUrl":"10.1016/j.quaint.2024.03.011","url":null,"abstract":"<div><p>In this work, we present new biostratigraphic and paleoecological data from the Mignone River valley, located in the central sector of the Tyrrhenian Sea margin and part of the wider Tarquinia basin, and cores in the area of Rome. By combining the new paleontological information with a review of the extant literature, we re-examine the stratigraphic architecture of the Pliocene succession in the central sector of the northwestern Tyrrhenian Sea margin, spanning the Zanclean (MPl1; 5.33–5.08 Ma) through the early Piacenzian (MPl4b; 3.57–3.31 Ma), and of the following Pleistocene transgressive-regressive sequence, comprising the Gelasian (MPl6; 2.59–1.81 Ma) through the Santernian (MPl1; 1.81–1.5 Ma).</p><p>We propose a revision of the paleogeographic evolution of the central Tyrrhenian Sea basins throughout the Pliocene-Lower Pleistocene interval, by coherently framing it within the chronology of the volcanic phases that occurred in this region. In particular, our reconstruction points toward the presence of a single Transgressive-Regressive (T-R) sequence starting with the Zanclean reflooding of the Mediterranean after the Messinian Salinity Crisis and ending in the Piacenzian, as opposed to the previously proposed occurrence of two depositional T-R sequences separated by an erosional phase affecting part of the <em>Globorotalia puncticulata</em> biozone.</p></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"692 ","pages":"Pages 1-20"},"PeriodicalIF":2.2,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1040618224001150/pdfft?md5=32b971e69c283e369ee5fc9a5e2eb072&pid=1-s2.0-S1040618224001150-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140759343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Dynamic influences of climate change on prehistoric lifeways in the Americas","authors":"Kurt M. Wilson,&nbsp;Weston C. McCool","doi":"10.1016/j.quaint.2024.04.002","DOIUrl":"https://doi.org/10.1016/j.quaint.2024.04.002","url":null,"abstract":"","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"689 ","pages":"Pages 1-4"},"PeriodicalIF":2.2,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140549804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flood events in the lower reaches of the Yellow River: OSL and radiocarbon dating on the Anshang site","authors":"Songna Wang ,&nbsp;Xiaodong Miao ,&nbsp;Tianyu Shi","doi":"10.1016/j.quaint.2024.03.006","DOIUrl":"10.1016/j.quaint.2024.03.006","url":null,"abstract":"<div><p>The lower reaches of the Yellow River have witnessed numerous episodes of flooding and considerable shifts in its course. Examining flood records within the Yellow River basin offers invaluable insights into ancient human settlements, agricultural practices, trade routes, and technological advancements of ancient Chinese civilizations. However, dating these fluvial sediments poses a considerable challenge due to either the scarcity of organic material for radiocarbon (¹⁴C) dating or the potential incomplete bleaching of sediments for optically stimulated luminescence (OSL) techniques. This study focused on the Anshang site located in Henan Province, we obtained OSL ages from distinct grain size fractions of quartz and cross-verified them with independent acceleration mass spectrometry (AMS) ¹⁴C ages. The findings revealed that both coarse quartz grains (CG) and medium quartz grains (MG) underwent complete bleaching in silt-dominated flood deposits and shallow lacustrine deposits. Conversely, the OSL ages of CG and MG quartz were notably overestimated by approximately 3–6 ka in silty clay-dominated flood deposits. Upon comparing the OSL ages with AMS ¹⁴C ages, it was evident that bulk organic matter AMS ¹⁴C ages aligned with CG OSL ages in shallow lacustrine deposits, but they appeared older than CG OSL ages in flood deposits. However, the AMS ¹⁴C ages from plant demonstrated good consistency. Consequently, we successfully identified flood-lacustrine sediments dating back to approximately ∼13 ka, ∼8–3 ka, ∼2.6 ka, ∼1 ka, and the last few hundred years, aligning well with historical documentation and earlier research. The regional evidence presented herein enhances our understanding of the applicability of OSL dating and AMS ¹⁴C dating in fluvial-lacustrine sediments. Armed with these new ages, we constructed a reference chronology for archaeological localities situated in the fluvial sediments of the lower reaches of the Yellow River.</p></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"694 ","pages":"Pages 13-25"},"PeriodicalIF":2.2,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140570358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 sea level and climate changes in the Gulf of Saros: Evidence from seismostratigraphic record and sediment core data","authors":"Kürşad Kadir Eriş ,&nbsp;Cerennaz Yakupoğlu ,&nbsp;Demet Biltekin ,&nbsp;Nurettin Yakupoğlu ,&nbsp;Asen Sabuncu ,&nbsp;Alina Polonia ,&nbsp;Luca Gasperini","doi":"10.1016/j.quaint.2024.03.013","DOIUrl":"10.1016/j.quaint.2024.03.013","url":null,"abstract":"<div><p>A detailed record of sea level changes and climate oscillations in the Gulf of Saros during the late Pleistocene to the Holocene is provided by high-resolution seismic reflection profiles and analysis of a sediment core. The seismic stratigraphy reveals the formation of four main depositional units bounded by prominent reflection surfaces, reflecting high sea level variations. The Last Glacial Maximum period in the gulf is associated with the lowstand sea level, forming the deepest marine terrace at −148 m. The increasing sea level due to post-glacial warming was accompanied by the deposition of transgressive units characterized by coastal onlaps together with local channel-fills. This transgressive phase was modulated by three brief still-stands sea levels at 17 cal ka BP, 14.6 cal ka BP and 13.6 cal ka BP, producing the younger marine terraces in the gulf at −135 m, −112 m and −90 m, respectively. A comparison of their depths with the global sea level curve reveals elevation differences with decreasing subsidence rates from the older to younger ages, implying tectonic subsidence along the gulf floor.</p><p>The close correlation of multi-proxy data from core SAG-22 in the gulf with the northern Aegean and Anatolia data strongly indicates that the timings of the past climate events generally agree with the global and regional climate patterns. The warm climate around the gulf during the late phase of Bølling/Allerød (13.3–12.6 cal ka BP) is represented by high marine biological productivity and improved ventilation in the deeper water due to subsequent transgression. Permafrost formation in the catchment area during the following cold and dry Younger Dryas period (12.6–11.7 cal ka BP) resulted in reduced soil erosion and sediment input to the gulf. Noticeable warming during the Early Holocene between 11.2 cal ka BP and 9.4 cal ka BP is recorded by the multi-proxy data of the core when the enhanced marine biological productivity occurred above the poorly oxygenated deep water column. The climatic deterioration to a cooler and drier phase during the Early to Middle Holocene transition (9.4–7.8 cal ka BP) resulted in intense physical weathering and erosion, causing the highest sedimentation in the gulf. The later period of the Holocene is associated with the formation of two discrete sapropels at 7.8 cal ka BP and 5.4 cal ka BP that were accompanied by warm and wet climates around the gulf.</p></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"695 ","pages":"Pages 18-30"},"PeriodicalIF":2.2,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140792542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}