Global and Planetary Change最新文献

{"title":"Assessing the hydroclimatic impacts of expanding a large inland lake in Australia","authors":"Zhiyuan Yang ,&nbsp;Dongryeol Ryu ,&nbsp;Min-Hui Lo ,&nbsp;Murray Peel ,&nbsp;Sugata Narsey","doi":"10.1016/j.gloplacha.2025.104878","DOIUrl":"10.1016/j.gloplacha.2025.104878","url":null,"abstract":"<div><div>The radiative and thermal properties of the land surface are associated with its moisture content. It is necessary to advance our understanding about how changes in the exchange of water and energy fluxes between land and atmosphere shape the regional hydroclimate. This study employs the Community Earth System Model (CESM) with water tracer enabled to simulate atmospheric responses to a “wetter” Australia with inland water expanses (or hypothetical lakes) of different extents. Perturbations in land surface water lead to increased latent heat flux, ranging from 79.21 to 97.98 <em>W/m</em>², which corresponds with significant surface cooling effects (e.g., an average decrease of 1.87 <em>K</em> in near surface air temperature). Results also show that the process of moisture recycling strengthens as more inland areas are “wetted” in model simulations. However, significant increases in precipitation are identified only in the simulation replacing the current land surface condition by a hypothetical lake covering one-third of the Australian continent. Wetting a relatively smaller extent of the dry inland would witness any resultant rainfall increases being balanced out by moisture divergence from surface cooling. On the contrary, wetting a significant portion of the land continuously changes large-scale circulation patterns, which may then modulate the moisture divergence induced by surface cooling and thus contribute to the precipitation increase. More efforts including, but not limited to, ensemble simulations would be needed to further validate the interactions between land and atmosphere revealed in this study.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104878"},"PeriodicalIF":4.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107102","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":"Control of surface exposure age on highly reactive iron of atmospheric dust","authors":"Shenghui Ouyang ,&nbsp;Wancang Zhao ,&nbsp;Le Li","doi":"10.1016/j.gloplacha.2025.104880","DOIUrl":"10.1016/j.gloplacha.2025.104880","url":null,"abstract":"<div><div>Highly reactive iron (Fe_HR) oxyhydroxides in atmosphere dust play a critical role in determining the bioavailability of dust-derived iron in the ocean, thereby exerting substantial control over open-ocean biogeochemistry. However, the Fe_HR content in atmosphere dust exhibits significant variability across different landscapes, and the underlying factors contributing to this variability remain poorly understood. One hypothesis suggests that the Fe_HR content is controlled by chemical kinetics, which transform Fe_HR into more crystallized oxyhydroxides, but quantifying this process at the landscape scale has been challenging. In this study, we investigate potential factors controlling Fe_HR by analyzing its relationship with surface exposure age (determined by uranium comminution dating), chemical weathering intensity, lithology, and climatic conditions using sediment samples from major Asian deserts. Our results show that the ratio of Fe_HR to total iron (Fe_T) exhibits a strong first-order kinetic relationship with surface exposure age, and a weak negative correlation with chemical weathering intensity but no correlation with climatic condition and lithology, suggesting that kinetic process dictated by surface exposure age plays a pivotal role during the transformation of iron species. This finding underscores the significance of cold, rapidly eroding terrains in producing Fe_HR. The kinetic control of exposure age on iron reactivity may induce a positive feedback loop between atmospheric CO₂ levels and glacial activity, potentially contributing to the onset of ice ages and the associated increase in climate variability.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104880"},"PeriodicalIF":4.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144089562","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":"Effect of anticyclonic eddies on the production and emission of marine dimethylsulfide in the northern South China Sea","authors":"Jin-Wei Wu ,&nbsp;Feng Xu ,&nbsp;Shi-Bo Yan ,&nbsp;Gao-Bin Xu ,&nbsp;Yu-Cheng Jiang ,&nbsp;Xiao-Ran Li ,&nbsp;Xing Zhai ,&nbsp;Li-Min Zhou ,&nbsp;Hong-Hai Zhang ,&nbsp;Zhao-Hui Chen","doi":"10.1016/j.gloplacha.2025.104883","DOIUrl":"10.1016/j.gloplacha.2025.104883","url":null,"abstract":"<div><div>Biogenic sulfide compounds, including dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP), and dimethylsulfoxide (DMSO), play a critical role in climate feedback and global sulfur cycles. Although the impact of mesoscale eddies on marine ecosystems is well established, their influence on sulfide compounds remains unclear. This study investigates the spatial distribution and key sink-source processes of DMS, DMSP, and DMSO in the South China Sea, a critical marginal sea of the western Pacific, during the summer of 2021, focusing on the influence of anticyclonic mesoscale eddies. We observed lower concentrations of these sulfides in the eddy core (for DMS, 1.80 ± 0.84 nmol L⁻¹, ranging from 0.66 to 2.95 nmol L⁻¹), whereas higher concentrations were found in the eddy edge (for DMS, 3.15 ± 2.17 nmol L⁻¹, ranging from 1.51 to 9.14 nmol L⁻¹). Notably, these compounds exhibited a distinct tendency to sink within the eddy core. This phenomenon can be attributed to the convergence and sinking of upper-layer water in the anticyclonic eddy core, which reduces nutrient availability in the upper layer, thereby affecting phytoplankton growth and altering the dominant species of phytoplankton. These changes in the phytoplankton community significantly impacted the source processes of DMS. The biological production rate of DMS was 53.3 % lower in the eddy core and 18.8 % higher at the eddy edge, compared to that in the reference sites. Furthermore, the difference between DMS production and total removal was largest at the eddy edge and smallest in the eddy core, shaping the observed DMS distribution pattern. Consequently, the diffusion of DMS from the sea to the atmosphere was reduced in the regions within the anticyclonic eddies. Our findings clarify the mechanisms through which mesoscale eddies affect the production and release of biogenic sulfides, underscoring the significant impact of mesoscale eddy processes on marine biogenic sulfides.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104883"},"PeriodicalIF":4.0,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071538","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":"Calcium isotope evidence for secondary carbonate formation in the Upper Yellow River, Northeastern Tibetan Plateau","authors":"Tong Zhao ,&nbsp;Qi Feng ,&nbsp;Yunqi Ma ,&nbsp;Tengfei Yu ,&nbsp;Wen Liu ,&nbsp;Qi Wei","doi":"10.1016/j.gloplacha.2025.104881","DOIUrl":"10.1016/j.gloplacha.2025.104881","url":null,"abstract":"<div><div>Chemical weathering and secondary mineral formation, both of which involve Ca cycling, are intricately linked to the carbon cycle. However, the impact of these geochemical processes on Ca cycling, particularly through secondary carbonate formation in terrestrial environments, remains poorly understood. In this study, we analysed Ca isotopic compositions in the Upper Yellow River, northeastern Tibetan Plateau, to investigate how chemical weathering and secondary processes affect Ca cycling in this region. Inversion modeling reveals the relative contributions of different sources to dissolved Ca in river water. Although Ca fractions from different sources show linear correlations with riverine δ^44/40Ca values, detailed analysis reveals that these correlations do not imply a source control. Strong positive correlations between Sr/Ca, Mg/Ca, and δ^44/40Ca suggest that the formation of secondary carbonate predominantly regulates δ^44/40Ca in both river and lake water. Using Monte Carlo simulations, the Rayleigh fractionation model best fits a Ca isotope fractionation factor of 0.9997. The highest δ^44/40Ca values (1.49 ‰ to 1.76 ‰) are attributed to secondary carbonate formation in lakes. Meanwhile, secondary carbonate, such as carbonate coatings, formed within the soil matrix and primarily influenced by rainfall, evaporation, and evaporite dissolution, explains ~0.3 ‰ of the variation in riverine δ^44/40Ca. Based on literature data, we propose that secondary carbonate formation could be the primary cause of the Ca isotope imbalance in river water. This study highlights the influence of secondary carbonate formation on the carbon cycle, particularly through its impact on CO₂ outgassing from lakes and the soil inorganic carbon pool.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104881"},"PeriodicalIF":4.0,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071539","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":"Spatiotemporal heterogeneity of Pliocene hydroclimate change across the East Asian monsoon region","authors":"Man Zhao,&nbsp;Liping Tian,&nbsp;Li Li,&nbsp;Guodong Jia","doi":"10.1016/j.gloplacha.2025.104875","DOIUrl":"10.1016/j.gloplacha.2025.104875","url":null,"abstract":"<div><div>The hydroclimate evolution of the East Asian summer monsoon (EASM) during the Pliocene warm period, not clearly understood presently, is insightful for predicting its trends in future global warming. Here, we present paired biomarker records from northern South China Sea (SCS) Pliocene sediments, reconstructing sea surface temperature (SST) via TEX₈₆ proxy and terrestrial humidity through leaf wax <em>n</em>-alkane distributions. These datasets are systematically compared with records from the southern SCS that is part of the modern Western Pacific Warm Pool (WPWP). Our analyses reveal that Pliocene TEX₈₆-based mean SSTs in the northern SCS, exceeding the modern WPWP SSTs, co-vary with those in the Eastern Tropical Pacific and show a variable SST difference from the central WPWP, suggesting dynamic changes of the WPWP. Terrestrial humidity reconstructions demonstrate a dry-wet-dry oscillation over South China and a clear N-S moisture seesaw pattern across the SCS that are in concert with changes in Pacific zonal and meridional SST gradients. Integrated with EASM records in North China, these findings delineate a persistent tripole precipitation mode spanning the EASM domain in the Pliocene. The existence of this tripole precipitation mode suggests that atmospheric circulation mechanisms governing modern EASM variability persist as fundamental regulators of hydroclimate even under the equable climate conditions of the Pliocene.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104875"},"PeriodicalIF":4.0,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070063","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":"Astrochronology of the Paleocene–Eocene Thermal Maximum on the East Tasman Plateau","authors":"Qingqing Jiang ,&nbsp;Mingsong Li ,&nbsp;Weiqi Yao ,&nbsp;Ren Wei ,&nbsp;Kaixuan Ji ,&nbsp;Haotian Zhang ,&nbsp;Zhijun Jin","doi":"10.1016/j.gloplacha.2025.104882","DOIUrl":"10.1016/j.gloplacha.2025.104882","url":null,"abstract":"<div><div>The Paleocene–Eocene Thermal Maximum (PETM) was a dramatic climatic event characterized by substantial perturbation of the carbon cycle and environmental crisis in the Cenozoic. Although astronomical forcing has been proposed as a mechanism of these changes, its precise influence on carbon cycle dynamics and climate feedbacks during the PETM remain insufficiently constrained. To address this gap, developing a high-resolution astronomical time scale is essential for accurately characterizing the climate response. Here, we established an astrochronology for the PETM based on statistical tuning, enhanced by a novel spectral analysis approach, using a sediment core from Ocean Drilling Program (ODP) Leg 189 Site 1172, located on the East Tasman Plateau in the high latitude of the Southern Hemisphere. Time series analysis of high-resolution X-ray fluorescence (XRF) scanning data for Fe and Ca from Hole 1172D reveals prominent eccentricity and obliquity signals, along with ∼170 kyr obliquity amplitude modulation cycles throughout the PETM. Our analysis indicates that the PETM interval spans approximately 8–9 precession cycles, with the onset of the carbon isotope excursion (CIE) occurring within half a precession cycle. Sedimentation rate estimates of ∼0.8–0.9 cm/kyr during the PETM further constrain organic carbon mass accumulation rates, thereby informing interpretations of carbon cycle dynamics during this interval. Overall, the astronomical time scale established at ODP Site 1172 provides critical constraints on orbital forcing, sedimentation rate variations, and carbon cycle feedbacks during the PETM.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104882"},"PeriodicalIF":4.0,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144089558","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":"Links of abrupt climate events in the eastern Hexi Corridor to Atlantic meridional overturning circulation changes during the last glacial: Magnetoclimatological evidence of the Shagou loess record","authors":"Mei Sheng ,&nbsp;Shiyu Yi ,&nbsp;Xisheng Wang ,&nbsp;Zongyao Li ,&nbsp;Ping Sun ,&nbsp;Yueyue Xin ,&nbsp;Ke Hu ,&nbsp;Zhenyu Yang","doi":"10.1016/j.gloplacha.2025.104879","DOIUrl":"10.1016/j.gloplacha.2025.104879","url":null,"abstract":"<div><div>The high-accumulation-rate eolian deposits in the eastern Hexi Corridor retain invaluable archives of rapid climatic fluctuations in the transition zone between the northwestern Chinese Loess Plateau, the Tengger Desert, and the northern foothills of the Qilian Mountains. High-resolution mineral magnetic and bulk grain size analyses for the Shagou loess–paleosol sequences since the last interglacial reveal that loess accumulation in northwestern limit of the East Asian summer monsoon is essentially continuous at multi-centennial scales, and variations in magnetic granulometry of the last glacial loess are predominated by the intensity of the East Asian winter monsoon (EAWM). Based on Greenland Ice Core Chronology, the complete recording of potentially all Dansgaard–Oeschger (D–O) cycles and Heinrich events substantiates a rapid response of the EAWM to the northern high-latitude abrupt climatic changes, regulated by the strength of the Atlantic Meridional Overturning Circulation (AMOC) and Arctic sea-ice extent. A synthesis of various high-resolution paleo-proxy records from the Northern Hemisphere further suggests the generally identical phasing of stadial–interstadial transitions and tight coupling of the atmosphere–ice–ocean system. We propose that the relatively stronger D–O signals in low-latitude tropical marine archives compared with middle-latitude land-based paleo-records may be accounted for by northward transport of heat and moisture originated from the warmest tropical oceans during interstadials, and the more significant influence of oceanic processes than that of atmospheric processes in propagating the northern high-latitude climatic signals during stadials. This study highlights the pivotal role of AMOC in modulating millennial-scale regional and global climate.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104879"},"PeriodicalIF":4.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072564","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 Holocene eolian dust activity recorded by a peat sequence in North Xinjiang, northwestern China","authors":"Mingrui Qiang ,&nbsp;Yingying Liu","doi":"10.1016/j.gloplacha.2025.104877","DOIUrl":"10.1016/j.gloplacha.2025.104877","url":null,"abstract":"<div><div>Information on the magnitude of dust emissions in source areas is critical for understanding the Asian dust cycles. However, high-resolution records representing the intensity of dust entrainment are scarce, primarily due to intense wind erosion in source areas. Here, based on measurements of multiple proxies from peat deposits, including ash flux, grain size, elemental compositions, and lead and neodymium isotopes, as well as radiocarbon dating of plant remains, we construct a ∼ 3400-year record of eolian dust activity in the Chaiwopu (CWP) Basin, northern Xinjiang, with a maximum temporal resolution of approximately 15 yr per sample. Mineral particles in the CWP peat were primarily transported by wind through either saltation or suspension across different sedimentary intervals. Geochemical proxies indicate that the primary source of these mineral particles is the Junggar Basin, which allows the peat to consistently record information on the interactions between wind regimes and the entrainment of sand and dust during the late Holocene. In light of changes in the &gt;63 μm fraction and ash flux, episodes of eolian dust activity occurred at 3.3–2.8, 1.7–1.4, 1.0–0.5 cal kyr BP and since 0.2 cal kyr BP. These events are largely comparable to dust episodes recorded in other studies, particularly the Neor peat sequence from northwestern Iran. By contrast, the most intense eolian activity at 3.3–2.8 cal kyr BP was dominated by dust storms, which can be attributed to a broad cold and dry climate, likely linked to Ice-Rafting Event 2 in the North Atlantic, as well as to an increased sediment supply due to climatic transitions. Subsequently, eolian activities weakened, characterized by the mobility of silt-sized dust under windy and slightly dry conditions. However, the event since 0.2 cal kyr BP was likely triggered by disturbances to the source surface due to increased human activity. Our results suggest a potential link between the source and sink of dust, such as the GISP2 ice cores. In addition to large-scale cold and dry climates, intensified dust emissions from source areas would play a significant role in establishing this dynamic linkage of airborne dust.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104877"},"PeriodicalIF":4.0,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943130","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":"Impacts of volcanism on geochemical records during the Late Permian-Early Triassic transition in northern and middle Norwegian continental margins","authors":"Qingting Wu ,&nbsp;Joseph M. Nsingi ,&nbsp;Wolfram M. Kürschner ,&nbsp;Brian J. Beaty ,&nbsp;Noah J. Planavsky ,&nbsp;Elke Schneebeli-Hermann ,&nbsp;Weiqi Yao ,&nbsp;Emily R. Cepin ,&nbsp;Ying Cui","doi":"10.1016/j.gloplacha.2025.104874","DOIUrl":"10.1016/j.gloplacha.2025.104874","url":null,"abstract":"<div><div>The end-Permian mass extinction (EPME; ∼252 Ma), known as the largest extinction event during the Phanerozoic Eon, provides a critical case study to understand the impacts of anthropogenic climate change. The warming associated with the EPME was likely triggered by the emissions of large quantities of CO₂ during the eruption of the voluminous Siberian Traps (ST) volcanism, which eliminated 80 to 90 % of marine species and 70 % of terrestrial species. However, the links between volcanism, negative carbon isotope excursions (nCIEs), chemical weathering, oceanic anoxia, and biotic turnover remain poorly understood. To better understand these connections, we analyze organic carbon isotopes, major element, and trace element geochemistry from two shallow marine sites at the Finnmark and Trøndelag Platforms in Norway, which serve as proxies for tracing volcanic-induced biogeochemical perturbations. Enhanced chemical weathering across the PTB at the Finnmark Platform and during the earliest Triassic at the Trøndelag Platform is indicated by increases in chemical weathering proxies (CIA, CIW, PIA, and Rb/Sr ratios) and decreases in WIP, along with indirect support from Li enrichment. At the Finnmark Platform, transient enrichments in primary productivity-sensitive elements (P and Ni) precede the PTB, but these signals likely result from a combination of nutrient input and localized lithological controls rather than a direct increase in marine productivity. This phase coincides with a brief period of reduced oxygen availability, as indicated by elevated U_EF, V_EF, and U/Th ratios, followed by a return to more oxygenated conditions. In contrast, at the Trøndelag Platform, sustained enrichment of P_EF, Ni_EF, U_EF, and U/Th ratios during the earliest Triassic suggests episodic oxygen depletion was likely driven by sediment redeposition processes rather than persistent euxinia or continuous biological productivity. The contrasting geochemical responses observed at the two platforms highlight the complexity of regional environmental feedbacks during the EPME, highlighting the importance of integrating multiple geochemical proxies in tracking environmental responses to climate change.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104874"},"PeriodicalIF":4.0,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143933606","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":"Hydroclimatic variability drove human-megafauna-environment interactions during the late Pleistocene/Early Holocene in central Chile","authors":"Matías Frugone-Álvarez ,&nbsp;Rafael Labarca ,&nbsp;Josu Aranbarri ,&nbsp;Matías Briceño ,&nbsp;Leonardo A. Villacís ,&nbsp;Carolina Godoy-Aguirre ,&nbsp;Antonio Delgado-Huertas ,&nbsp;José Blanco ,&nbsp;Claudio Latorre ,&nbsp;Erwin González-Guarda ,&nbsp;Natalia Villavicencio ,&nbsp;Carlos Tornero ,&nbsp;José Iriarte ,&nbsp;Blas Valero-Garcés","doi":"10.1016/j.gloplacha.2025.104876","DOIUrl":"10.1016/j.gloplacha.2025.104876","url":null,"abstract":"<div><div>Major environmental changes were occurring when the first modern humans arrived in South America during the Pleistocene-Holocene transition. How these changes shaped human-environmental interactions across this period remain unclear. We analyzed the stratigraphy, biogeochemistry, and paleoclimatic models from the Ancient Tagua Tagua Lake (ATTL) in central Chile, one of the few continuous records of human and megafauna interactions with their environment in South America, to reconstruct the ATTL’'s ecosystem dynamics over the past 20,000 years. Results reveal that the ATTL transitioned from a shallow, cool lake with storm-driven alluvial deposition to a warmer, deeper, and more productive lake about 12,500 years ago, aligning with early humans' arrival. The ATTL became wetter but experienced severe droughts between 11,000 and 8,500 years ago, linked to shifts in Southern Westerly Winds and ENSO-like patterns. Fluctuating conditions drove humans and fauna to seek refuge in the basin, emphasizing local paleohydrology’'s role in shaping early human-ecosystem interactions.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104876"},"PeriodicalIF":4.0,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070061","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}