Palaeogeography, Palaeoclimatology, Palaeoecology最新文献

{"title":"Taphonomic analysis of storm-influenced shallow-marine deposits in the Tubul Formation (Pliocene-Pleistocene), Chile","authors":"Diego Volosky ,&nbsp;Camila Vargas ,&nbsp;Katherine Cisterna ,&nbsp;Alfonso Encinas ,&nbsp;Sandra Gordillo ,&nbsp;Fernando Muñiz ,&nbsp;Luis A. Buatois ,&nbsp;Patricio Zambrano","doi":"10.1016/j.palaeo.2025.113257","DOIUrl":"10.1016/j.palaeo.2025.113257","url":null,"abstract":"<div><div>The Upper Pliocene – Lower Pleistocene Tubul Formation of south-central Chile contains one of the richest pre-Holocene marine faunas of the southeastern Pacific margin. While its fossil content, particularly the mollusk assemblages, has been extensively studied taxonomically, the unit has received little attention from a sedimentologic perspective, leaving uncertainties about its depositional setting and processes. Interpretation is further complicated by its largely homogeneous, fine-grained lithology and the scarce preservation of sedimentary structures. However, the fossil content provides several clues. The mollusk-dominated fossil assemblages occur predominantly as fossil concentrations, enabling the use of a taphonomic approach for their study. Integrating taphonomic, sedimentologic, and ichnologic evidence reveals deposition in the lower shoreface to upper offshore zones of a wave-dominated but protected coastline, with low sedimentation rates and sporadic storm influence. This setting promoted pervasive bioturbation by benthic organisms. Vertical changes in faunal composition (i.e., an increasing dominance of brachiopods) and a slight fining-upward trend suggest a marine transgression during the deposition of the upper succession. The Tubul Formation fossil concentrations and their taphonomic analysis prove to be a useful tool in the study of storm-influenced shallow-marine deposits, particularly as a case in which the lack of other well-preserved sedimentary structures and a relatively homogenous succession make its study difficult. This underscores the value of an integrated sedimentologic, ichnologic, and taphonomic approach in paleoenvironmental and paleoecologic studies.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"679 ","pages":"Article 113257"},"PeriodicalIF":2.7,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145005048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tectonic-climatic coupling drove a mid-pleistocene river piracy in the Northern Qilian Shan, northeastern Tibetan Plateau: Evidence from Isochron 26Al/10Be Burial Dating and χ analyses","authors":"Qi Su ,&nbsp;Xianyan Wang ,&nbsp;Daoyang Yuan ,&nbsp;Huiping Zhang ,&nbsp;Zhengchen Li ,&nbsp;Hao Sun ,&nbsp;Hongqiang Li","doi":"10.1016/j.palaeo.2025.113224","DOIUrl":"10.1016/j.palaeo.2025.113224","url":null,"abstract":"<div><div>River piracy, a dynamic process reshaping drainage networks, plays a pivotal role in landscape evolution, yet its timing and driving mechanisms in active orogens remain poorly constrained. This study focuses on the piracy between the Hongshuiba River and the Zhulongguan River in the northern Qilian Shan (Shan means “mountain” in Chinese), northeastern Tibetan Plateau, to resolve its chronology and geomorphic implications. Utilizing isochron ²⁶Al/¹⁰Be burial dating of fluvial sediments from the abandoned water divide, we determine the piracy occurred at 0.79 ± 0.24 Ma, marking the first radiometric age for such an event in this region. χ analyses reveal pre-piracy disequilibrium in the Zhulongguan River profile, attributed to an earlier piracy by the Beida River, which preconditioned the landscape for subsequent Hongshuiba-Zhulongguan piracy. Integrated results demonstrate that the Hongshuiba-Zhulongguan piracy was driven by tectonic uplift that amplified topographic gradients and the mid-Pleistocene climate transition, which enhanced erosional efficiency. These findings highlight the coupling between northward extension of the Qilian Shan and orbital-scale hydroclimatic variability in triggering threshold-driven drainage reorganization, offering insights into transient landscape responses in active orogens.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"679 ","pages":"Article 113224"},"PeriodicalIF":2.7,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145005047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 moisture and aeolian activity recorded in loess from the Yarlung Tsangpo, Southern Tibetan Plateau","authors":"Wenli Li ,&nbsp;Weijan Zhou ,&nbsp;Peng Cheng ,&nbsp;Yuda Chui ,&nbsp;Ling Yang ,&nbsp;Yan Hu ,&nbsp;Jie Zhou ,&nbsp;Peixian Shu ,&nbsp;Xuefeng Lu","doi":"10.1016/j.palaeo.2025.113258","DOIUrl":"10.1016/j.palaeo.2025.113258","url":null,"abstract":"<div><div>As a part of the third pole of the earth, the southern Tibetan Plateau (southern TP) is sensitive to climate change. Understanding how this region evolved in the past offers valuable insights for understanding future climate trends. Despite many efforts, the evolution of moisture and aeolian activity during the Holocene in the southern TP remains controversial, in part due to the complex topography and regional atmospheric circulation. In addition, constructing a sound chronology for aeolian sediments using radiocarbon is challenging. Here we use the low-temperature organic carbon fraction from a sediment profile from the middle reaches of the Yarlung Tsangpo, southern TP. We reconstructed a Holocene history of humidity and dust using grain size, magnetic susceptibility, and organic matter as climate proxies. The reconstructed history features three distinct stages. During the early Holocene (11.7–8.3 ka B·P), the climate was humid with weak dust activity, under the influence of the Indian Summer Monsoon (ISM). But during 8.3–5.8 ka B·P, moisture was also influenced by the North Atlantic Oscillation (NAO). Diminished solar activity led to a negative NAO phase, intensifying aeolian activity. From 5.8 ka B·P onward, enhanced winter insolation and stronger mid-latitude westerlies (MLW) contributed to a renewed warm and humid climate. This study provided an insight in which to view the interplay of Holocene climatic systems and environmental change in the southern TP.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"678 ","pages":"Article 113258"},"PeriodicalIF":2.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144933585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stable isotopes of modern water and biotic fossils across central Himalaya as indicators of paleoelevation and paleoclimate","authors":"Yadong Xu ,&nbsp;Fenning Chen ,&nbsp;Xiaoning Guo ,&nbsp;Junliang Ji ,&nbsp;Kai Cao ,&nbsp;Bowen Song ,&nbsp;Guocan Wang ,&nbsp;An Wang ,&nbsp;Kexin Zhang","doi":"10.1016/j.palaeo.2025.113256","DOIUrl":"10.1016/j.palaeo.2025.113256","url":null,"abstract":"<div><div>The initial of Neogene sedimentation is related to normal faults along the north-south trending grabens. The Gyirong Basin is sensitive to reveal elevation change in central Himalaya. Analyzing δ¹⁸O_mw values and correcting catchment elevations for 39 surface water data along the Gyirong River and the Kali Gandaki, a new fitting equation is established. The Δ(<em>δ</em>¹⁸O_mw) of modern surface waters match very well with previous curve for Rayleigh fractionation with initial <em>T</em> = 295 K and relative humidity = 80 %. Stable isotopic values from modern meteoric water and ostracoda shells are analyzed based on local empirical dataset and the Rayleigh fractionation. In addition to the isotopic data, many pollen data are available to reveal paleoclimatic variation and paleoelevation reconstruction. Both of estimated data documented surface uplift to 6 km since 7.2 Ma and down to 5.3 km during 4.7–3.2 Ma in the central Himalaya, with the underestimate reduction of 550–900 m. Three warm-humid transitions were observed during 7.2–4.7 Ma followed by cooling condition since 4 Ma. The overall uplift history of the Himalaya since 7.2 Ma, underwent an elevation loss phenomenon of the mountain area and an equilibrium position of the basin floor during 4.7–3.2 Ma, which might be as a result of <em>E</em>-W extension and intense weathering and erosion of regional drainage.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"678 ","pages":"Article 113256"},"PeriodicalIF":2.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Latest Pleistocene to mid-Holocene vegetation changes revealed by multi-proxy analyses at Lop Nur in the eastern Central Asia","authors":"Yi-Feng Yao ,&nbsp;Kai-Qing Lu ,&nbsp;Feng Qin ,&nbsp;Guo-An Wang ,&nbsp;Qin-Min Yang ,&nbsp;Xin-Ying Zhou ,&nbsp;David K. Ferguson ,&nbsp;Gan Xie ,&nbsp;Jin-Feng Li ,&nbsp;Bin Sun ,&nbsp;Stephen Blackmore ,&nbsp;Yu-Fei Wang","doi":"10.1016/j.palaeo.2025.113249","DOIUrl":"10.1016/j.palaeo.2025.113249","url":null,"abstract":"<div><div>The dried-up lake bed of Lop Nur is a well-known example of environmental change in arid Central Asia (ACA) and witnessed the rise and fall of a major Silk Road civilization. However, a lack of interdisciplinary analyses, quantitative climate data together with inadequate characterization of the desert vegetation has hindered a comprehensive understanding of past vegetation and environmental changes in the region. Here we perform a high-resolution analysis of pollen, grain size, stable carbon and nitrogen isotopes from a 617-cm sediment core from Lop Nur to reconstruct vegetational and environmental changes between ∼23.3 to 7.2 cal kyr BP and understand their potential drivers. Results show that variations in solar activity and westerlies drove water circulation in the region, triggering an alternateon between temperate shrubby desert and temperate semi-shrubby/dwarf semi-shrubby desert, accompanied by the fluctuations in lake level fed by alpine meltwater. Lake organic matter was mainly derived from aquatic vascular plants and phytoplankton in the latest Pleistocene (∼23.3–11.6 cal kyr BP), but shifted to a greater diversity of sources (soil, C₃ terrestrial plants, aquatic vascular plants and phytoplankton) in the early to middle Holocene (11.6–7.2 cal kyr BP), while the nitrogen levels in the lake sediment were mainly controlled by soil erosion, and only marginally influenced by atmospheric nitrogen deposition. These findings provide a past analog for the prediction of future environmental change and ecosystem sustainable development in ACA under the scenario of global change.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"678 ","pages":"Article 113249"},"PeriodicalIF":2.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144933582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 dynamics of carbon cycle changes and their underlying mechanisms during the Sakmarian to Artinskian transition","authors":"Yanan Li ,&nbsp;Longyi Shao ,&nbsp;Christopher R. Fielding ,&nbsp;Tracy D. Frank ,&nbsp;Zhaorui Ye ,&nbsp;Jing Lu ,&nbsp;Kuan Yang ,&nbsp;Shuai Wang","doi":"10.1016/j.palaeo.2025.113255","DOIUrl":"10.1016/j.palaeo.2025.113255","url":null,"abstract":"<div><div>The Sakmarian to Artinskian transition was marked by significant global climate change, evolving from glacial to postglacial conditions in high southern paleolatitudes. This climate transformation was accompanied by significant paleoenvironmental changes, concomitant with a realignment in biodiversity patterns. Most previous studies attributed this climatic transition to increasing atmospheric <em>p</em>CO₂ concentrations, but the driving mechanisms during this period have not been clearly elucidated. To address these shortcomings, an integrated multi-proxy analysis was conducted, including measurements of mercury (Hg) and nickel (Ni) concentrations, total organic carbon (TOC), and carbon isotopic compositions of organic matter (δ¹³C_org) on a Sakmarian to Artinskian succession in North China. This investigation was carried out within the context of a new U-Pb zircon age-constrained framework, ranging from 295.6 ± 0.1 Ma to 284.2 ± 2.4 Ma, which covers the interval from the Shansi Formation to the Lower Shihhotse Formation in the Dacheng coalfield, Hebei Province. Simultaneous late Sakmarian Hg and Hg/TOC peaks, temporally coupled with negative δ¹³C_org excursions and dated tuffaceous mudstone layers, demonstrate that elevated Hg levels and carbon cycle perturbations were primarily driven by volcanic activity, with wildfires as a secondary contributor. Volcanic activity potentially associated with the Tarim II Large Igneous Province likely played a role in elevating atmospheric <em>p</em>CO₂ concentrations around the Sakmarian-Artinskian boundary, which may have triggered the nonglacial interval that separated the P1 and P2 glaciations. Sustained elevated atmospheric <em>p</em>CO₂ during the earliest Artinskian stage might be additionally attributed to the contraction of tropical coal-forming forests, an emerging trend towards more arid climates, and increased wildfires. Results offer insights into the interplay among volcanic forcing, terrestrial feedbacks, glaciations, climate dynamics, and carbon cycle disturbances during this critical phase of the late Paleozoic Ice Age.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"679 ","pages":"Article 113255"},"PeriodicalIF":2.7,"publicationDate":"2025-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145005052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 significance of impact-induced hydrocarbon soot aerosols in global climate change and extinctions","authors":"Kunio Kaiho ,&nbsp;Naga Oshima","doi":"10.1016/j.palaeo.2025.113237","DOIUrl":"10.1016/j.palaeo.2025.113237","url":null,"abstract":"<div><div>Large meteoroid impacts have punctuated the Phanerozoic Eon, with the Cretaceous–Paleogene (K–Pg) impact as the most prominent example. While some impacts triggered global climate change and mass extinctions, others produced only limited environmental effects. These events injected aerosols into the stratosphere, reducing sunlight, cooling the climate, and decreasing precipitation. Major aerosol types include sulfuric acid (from sulfur-rich rocks), soot (from organic-rich target rocks and wildfires), and dust (from pulverized rock), though their relative roles remain uncertain. Here we quantify the production of each aerosol type and calculate surface temperature anomalies for the nine largest impact craters of the past 250 Myr using target rock lithologies and climate model outputs. Our cross-plot analysis of temperature and extinction magnitude reveals that soot generated from organic carbon in target rocks is likely the primary driver of impact-induced mass extinctions. Additionally, we estimated the frequencies of impact-generated mass extinctions for each aerosol type using two cases: one major extinction (&gt;60 % species loss) in 540 million years (K-Pg) and two major-moderate extinctions (&gt;20 % species loss) in 250 million years (K-Pg and mid Norian). Our findings demonstrate that soot formed from sedimentary rocks most accurately matches the observed frequencies—one major and two minor-major extinctions. These results establish that the severity of cooling and extinction triggered by meteoroid impacts is primarily determined by the abundance of buried organic carbon in the target rocks, underscoring the target sensitivity of impact-induced climate effects.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"678 ","pages":"Article 113237"},"PeriodicalIF":2.7,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbon isotope stratigraphy of early Silurian carbonate rocks from the South China Block: Implications for dating post-Ordovician reef recovery","authors":"Shenyang Yu ,&nbsp;Shouxiang Wang ,&nbsp;Zhongyang Chen ,&nbsp;Stephen Kershaw ,&nbsp;Axel Munnecke ,&nbsp;Shasha Liu ,&nbsp;Xiaojie Deng ,&nbsp;Wei Guo ,&nbsp;Yingyan Mao ,&nbsp;Yao Wang ,&nbsp;Qijian Li","doi":"10.1016/j.palaeo.2025.113247","DOIUrl":"10.1016/j.palaeo.2025.113247","url":null,"abstract":"<div><div>This study presents the first integrated carbon isotope stratigraphy and conodont biostratigraphy from the Rhuddanian to Aeronian (Llandovery, early Silurian) carbonate successions at the continuously exposed Kuaizishan and Yangdeng sections in Guizhou Province, South China Block (SCB). At the Kuaizishan section, a positive carbon isotope excursion (CIE) is recorded within the Xiangshuyuan Formation, along with the biostratigraphically diagnostic conodont <em>Ozarkodina obesa</em>. At the Yangdeng section, the Shiniulan Formation records both the falling limb of a positive CIE and a complete CIE, associated with <em>Ozarkodina wangzhunia and Ozarkodina parahassi</em>. Based on the biostratigraphic data, the CIE in the Xiangshuyuan Formation and falling limb in the Shiniulan Formation are interpreted as the early Aeronian CIE (<em>Ozarkodina obesa</em> Biozone), while the complete CIE in the Shiniulan Formation is attributed to the late Aeronian CIE (<em>Ozarkodina guizhouensis</em> Biozone). These results suggest that the Xiangshuyuan Formation spans from the middle Rhuddanian to earliest middle Aeronian, and the Shiniulan Formation from the early to late Aeronian. A composite carbon isotope curve from both sections provides a regional reference for correlating early Silurian carbonates within the SCB. The early Aeronian CIE shows comparable patterns across Laurentia, Baltica, and the SCB, indicating its global extent. In contrast, the late Aeronian CIE exhibits reduced expression towards the basin in both the Michigan Basin of Laurentia and the Upper Yangtze region of the SCB. Together, these two Aeronian CIEs highlight their global significance and stratigraphic utility. Furthermore, carbon isotope stratigraphy indicates that the widely distributed metazoan reefs in the Shiniulan Formation (the SCB) and the Minier Formation (Laurentia) are approximately coeval, providing evidence for a global-scale recovery of reef environments following the end-Ordovician mass extinction, which was completed by the late Aeronian Age.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"678 ","pages":"Article 113247"},"PeriodicalIF":2.7,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface soil phytolith assemblages in different vegetational zones of the Nilgiri Biogeographical Region, Western Ghats, India: implications for palaeoclimatic interpretation","authors":"Gayathri Rajendiran ,&nbsp;Vivek Pandi ,&nbsp;Vishnu Shreekara Bhat ,&nbsp;Nidhi Vastrad ,&nbsp;K. Anupama ,&nbsp;Doris Barboni","doi":"10.1016/j.palaeo.2025.113254","DOIUrl":"10.1016/j.palaeo.2025.113254","url":null,"abstract":"<div><div>In the present study, we analyzed surface soil phytolith assemblages from 70 sites across seven vegetation types spanning an altitudinal range of 300–2400 m in the Nilgiri Biogeographic Region (NBR), Western Ghats, India. A total of 29 morphotypes were identified, dominated by BILOBATE, SADDLE, RONDEL, ELONGATE, BLOCKY, and POLYHEDRAL forms. Lowland seasonally-dry tropical forests (STDFs) were characterized by high proportions of C4 grass indicators, mid-elevation moist and wet forests exhibited mixed C3-C4 signatures, while upper montane forests and grasslands contained phytolith assemblages indicating relative grass dominance, although absolute grass cover was underestimated and woody signals overrepresented. Discriminant analysis achieved a moderate classification accuracy of ∼55 %, indicating a possible overlap between vegetation types and transitional communities. Principal Component Analysis indicated that elevation and mean annual precipitation as primary controls on phytolith composition. Morphometric analysis of BILOBATE phytoliths revealed decreasing dimensions (length and shank length) with elevation and strong positive correlations with mean annual temperature, highlighting temperature as a key driver of silica deposition. Overall, this first phytolith-based vegetation study in the NBR establishes a modern reference framework for interpreting the fossil record. Our findings demonstrate both the potential and limitations of phytolith assemblages and morphometrics for reconstructing past vegetation and climate in NBR and similar tropical montane ecosystems.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"678 ","pages":"Article 113254"},"PeriodicalIF":2.7,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"June–September mean temperature variability in the eastern Qinghai-Tibet Plateau over the past 225 years based on high quality tree-ring records","authors":"Xinyue Li ,&nbsp;Linlin Gao ,&nbsp;Baolong Ma ,&nbsp;Kai Wang ,&nbsp;Yang Deng","doi":"10.1016/j.palaeo.2025.113253","DOIUrl":"10.1016/j.palaeo.2025.113253","url":null,"abstract":"<div><div>Being one of the most high-resolution climate proxies, tree-rings have been extensively used in paleoclimate studies, and help forecast future global warming and patterns of climate change. However, most climate reconstructions based on tree-ring data explain less than 50 % of the variance observed in meteorological station records, and high-quality chronologies are essential for a reliable assessment of climate change. Here, we present a new June–September mean temperature reconstruction over the past 225 years (1796–2020 CE) using <em>Abies faxoniana</em> tree-ring width data from the eastern Qinghai-Tibet Plateau, which explains 67.4 % of the instrumental temperature variations during 1960–2020 CE (<em>r</em> = 0.82, <em>p</em> &lt; 0.001). This reconstruction shows significant (<em>p</em> &lt; 0.01) spatial representativeness for June–September temperature variations in the eastern Qinghai-Tibet Plateau and allows identification of significant (<em>p</em> &lt; 0.05) cycles at 2–4-, 54-, 79-, and 128-year periodicities. Three obvious cold periods in 1810s–1820s, 1910s–1930s, and 1960s–1980s were likely related to low solar activity and frequent volcanic eruptions, negative phases of Atlantic Multidecadal Oscillation and Pacific Decadal Oscillation, and enhanced anthropogenic aerosol-induced radiation dimming, respectively. Consistency with nearby temperature reconstructions and divergence with the Northern Hemisphere temperature variations suggest that more regional and high-quality tree-ring-based climate research should be conducted to advance our knowledge of climate variability.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"679 ","pages":"Article 113253"},"PeriodicalIF":2.7,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145005046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}