Global and Planetary Change最新文献

{"title":"Sediment provenance and weathering in the northern South China Sea and its implications for climate change and sea-level fluctuations over the past 140 kyr","authors":"Lingling Xu ,&nbsp;Li Wu ,&nbsp;Shiqiao Liu ,&nbsp;Liang Chen ,&nbsp;Chenglong Wei ,&nbsp;Fangjian Xu","doi":"10.1016/j.gloplacha.2025.105042","DOIUrl":"10.1016/j.gloplacha.2025.105042","url":null,"abstract":"<div><div>Marine sediments contain valuable records of climate change and land-sea interactions. Numerous studies have investigated sediments from the northern South China Sea; however, research on the deep-sea basin southwest of this region remains limited. In this study, we analyze the major and trace elements of sediments collected from the eastern ridge of the Xisha Islands to identify their provenance and examine their responses to climate change over the past 140 kyr. The results indicate that sediments primarily originated from southwestern Taiwan and the Pearl River, with their relative contributions modulated by sea-level fluctuations on glacial-interglacial timescales. During glacial periods, Taiwan Island and the Pearl River contributed approximately 42 % and 58 %, respectively, to the total terrigenous input. During interglacial and intermediate climate periods, their contributions were approximately 52 % and 47 %, respectively. Our findings suggest that the East Asian summer monsoon strongly influenced the chemical weathering of surrounding source regions, although this effect is primarily evident in sediments deposited when the sea level was above −50 m. In contrast, the enhanced weathering intensity observed during glacial periods is attributed to secondary weathering processes at sea levels below −50 m. This study highlights the interplay between sea-level fluctuations, climate change, and chemical weathering processes, offering new insights into the influence of climate change on deep-sea sedimentation.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"254 ","pages":"Article 105042"},"PeriodicalIF":4.0,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907993","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":"Exploring the impact of the Great Green Wall on Atlantic Tropical Cyclone activity","authors":"Roberto Ingrosso ,&nbsp;Francesco S.R. Pausata ,&nbsp;Katja Winger ,&nbsp;Suzana J. Camargo","doi":"10.1016/j.gloplacha.2025.105041","DOIUrl":"10.1016/j.gloplacha.2025.105041","url":null,"abstract":"<div><div>The Great Green Wall (GGW) initiative aims to restore 100 million hectares of degraded land over the Sahel. However, its potential impacts on the far-afield climate have hitherto not been evaluated. Here, we use a high-resolution regional climate model to evaluate the potential impacts on Atlantic tropical cyclone (ATC) activity in four different GGW scenarios under two emission pathways. The results reveal a shift in ATC genesis from the subtropical and western Atlantic to the eastern Main Development Region under medium to extreme vegetation density scenarios, compared to cases without the GGW. An increase in genesis is also observed off the coasts of eastern Florida and the Carolinas under the high-concentration pathway. However, no significant change in basin-wide TC frequency is found. Instead, the main impact of GGW appears to be a redistribution of tropical cyclogenesis within the basin. Our analysis highlights the primary role of African Easterly Waves in driving changes in TC genesis across the eastern MDR, while large-scale environmental factors – though secondary overall - primarily influence changes off the southeastern U.S. coast. No GGW-induced changes are found in the ATC intensity, translation speed or other TC metrics across the entire basin.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"254 ","pages":"Article 105041"},"PeriodicalIF":4.0,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004321","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":"Defining the formation mechanism of regional scale-folds","authors":"Valentin Nistor ,&nbsp;Liviu Matenco ,&nbsp;Ioan Munteanu ,&nbsp;Ernst Willingshofer","doi":"10.1016/j.gloplacha.2025.105033","DOIUrl":"10.1016/j.gloplacha.2025.105033","url":null,"abstract":"<div><div>We aim to define a mechanism for the formation of outcrop-scale structures associated with the formation of regional asymmetric folds with overturned flanks crosscut by high-angle reverse faults in sediments characterized by contrasting rheological alternances. Although such regional “scale-folds” are often observed, a quantitative analysis of this deformation type is still needed. One place where outcrop-scale structures associated with the formation of regional scale-folds are well-observed is the Marginal Folds unit of the East Carpathians in Europe. Contrasting rheological alternances driving the formation of scale-folds are created by deep-water turbidites, pelagic sediments and more shallow-water deposits. We have combined new field structural observations with existing depth constraints from wells and seismic data to define the deformation history and analyse its relationship with the rheological stratification. Deformation starts with the formation of detachment folds and continues with the formation of regional asymmetric folds by gradual thinning along their flanks and thickening in hinges, accommodated by omission and duplication shears, as well as hinge-collapse structures. As shortening continues and deformation gradually exaggerates the regional scale folds, it undergoes reverse faulting that gradually steepens and truncate the overturned foreland flanks of folds in a forward-breaking sequence. This deformation is followed by out-of-sequence overthrusting and formation of hinterland-dipping duplexes and backthrusting. The result is a dominant sub-vertical position of the observed strata and closely spaced reverse faults that formed gradually during the intense folding. These findings demonstrate a new kinematic and structural genetic type of deformation that can be applied elsewhere for structural or applied studies.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"254 ","pages":"Article 105033"},"PeriodicalIF":4.0,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144897857","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":"Wind direction dominates the transport and deposition of fire proxies in tropical dry forest landscapes of the Western Ghats","authors":"Prabhakaran Ramya Bala ,&nbsp;Kumar Nithin ,&nbsp;Diptimayee Behera ,&nbsp;Ambili Anoop ,&nbsp;Binisia Sanatan ,&nbsp;Velu Vinoj ,&nbsp;Raman Sukumar","doi":"10.1016/j.gloplacha.2025.105034","DOIUrl":"10.1016/j.gloplacha.2025.105034","url":null,"abstract":"<div><div>Few studies have looked at transportation and deposition of fire proxies in an active wildfire in tropical forests. We opportunistically sampled surface sediments from two wetlands a week after a wildfire in the contiguous dry tropical forests of Bandipur and Mudumalai National Parks, Western Ghats, southern India. The wetlands sampled were roughly located between the largest and the second-largest burnt areas. We looked at common fire proxies – macrocharcoal, microcharcoal, microcharcoal/pollen (C/P) ratio and the abundance and distribution of Polycyclic Aromatic Hydrocarbons (PAHs). Macrocharcoal counts per gram of dry sample were low (mean ∼5), while the C/P ratio was ∼1. PAHs were found in both sites with significantly different compositions, one site was dominated by Low Molecular Weight (LMW) PAHs and the other by HMW PAHs. Watershed and climatology analysis were done to constrain potential rework of legacy proxies. Analysis of wind speed and direction and HYbrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model trajectories show that some of the smoke plume from the smaller burnt area passed through our sampling locations and left behind modest traces of the fire. We conclude that wind direction and wet deposition are essential factors determining the transport and deposition of fire proxies in this environment. Hence, multi-site data must be used for an accurate reconstruction of fire histories to account for false absences of peaks in fire proxies.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"255 ","pages":"Article 105034"},"PeriodicalIF":4.0,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144897858","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":"A climate of conflict: How the little ice age sparked rebellions and revolutions across Europe","authors":"David Kaniewski ,&nbsp;Nick Marriner ,&nbsp;Frédéric Luce ,&nbsp;Morgane Escarpe ,&nbsp;Majid Pourkerman ,&nbsp;Thierry Otto","doi":"10.1016/j.gloplacha.2025.105038","DOIUrl":"10.1016/j.gloplacha.2025.105038","url":null,"abstract":"<div><div>The Little Ice Age (LIA) – lasting from ∼1250 to ∼1860 - was a long period of cooler, drier conditions, characterized by increased climate instability. The most significant climate extremes were more closely associated with interannual temperature variations or particularly severe, isolated cold spells than with prolonged cold spells lasting many years. During this pre-industrial phase of climate instability, many rebellions broke out, one of the most famous being the French Revolution of 1789. A key question, however, relates to the precise and often intricate role of climate in precipitating these widespread uprisings and rebellions that profoundly reshaped human institutions, particularly in the European context. Using data for solar activity, temperature, precipitation, volcanic forcing and the evolution of grain prices, we compared and contrasted the occurrence of rebellions and revolutions across a wide geographical area comprising Europe-Russia-Ottoman Empire with LIA climate and hazards. We find that climate change primarily affected people's livelihoods by reducing harvests, lowering food-resource availability and sharply increasing cereal prices. Climate therefore played a major role in heightening population vulnerability by exacerbating one of the greatest scourges: malnutrition. For the populace, this fuelled social anger towards political authorities for failing to mitigate the impact of climate change. This study primarily reveals that environmental causes did not generate social crises during the LIA but rather triggered a cascade of environmental and human events that interacted, ultimately leading to highly conflictual situations. The LIA serves as a warning to modern political systems, highlighting the necessity to anticipate the consequences of current climate change to mitigate its impact on societies and prevent social unrest and conflict.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"254 ","pages":"Article 105038"},"PeriodicalIF":4.0,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892143","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":"Geochemical, thermodynamic and Li isotope constraints on the genesis of rare-metal pegmatites: Implications for crustal Li cycling","authors":"Qing Du ,&nbsp;Jiyuan Yin ,&nbsp;Wenjiao Xiao ,&nbsp;Tao Wang ,&nbsp;Mike Fowler ,&nbsp;Zhiyong Zhu ,&nbsp;Zaili Tao ,&nbsp;Guibin Zhang ,&nbsp;Min Sun ,&nbsp;Guochun Zhao","doi":"10.1016/j.gloplacha.2025.105029","DOIUrl":"10.1016/j.gloplacha.2025.105029","url":null,"abstract":"<div><div>Rare-metal pegmatite deposits are widespread in collisional settings around the world and are increasingly important to the global requirement for critical metals. However, their genesis and rare-metal enrichment processes remain enigmatic, particularly concerning whether they originate from highly fractionated granitic magmas or anatexis of metasedimentary rocks. In this study, we integrate zircon U<img>Pb geochronology, whole-rock and mineral chemistry and Li isotopic compositions of pegmatites and associated granitoids from the West Kunlun Orogenic Belt (WKOB) in northern Tibetan Plateau, to investigate these issues. Zircon U<img>Pb dating yields weighted mean ages of 223 Ma for the pegmatites and 213–222 Ma for the adjacent granitoids. Compared with the granitoids, the pegmatites exhibit distinct geochemical signatures, including high SiO₂ (72.9–74.5 wt%) and Al₂O₃ (16.2–17.2 wt%), low TiO₂ (&lt;0.01 wt%), ^TFe₂O₃ (0.09–0.21 wt%) and MgO (&lt;0.02 wt%), and strongly peraluminous signatures (A/CNK = 1.04–2.56). δ⁷Li values of Li-rich pegmatites and Li-poor pegmatites are relatively uniform (+2.11 to +0.8 ‰), but for muscovite the δ⁷Li values extend to lower values in Li-poor than Li-rich pegmatites (−2.93 to +2.11 ‰ and + 0.37 to +2.98 ‰, respectively). The absence of coherent fractionation trends between pegmatites and granitoids (e.g., Rb, Cs), along with a lack of mineralogical evidence for extreme magmatic differentiation, argues against a fractionated granite origin. Instead, Li isotope models of partial melting, thermodynamically-defined phase equilibria and associated elemental calculations all demonstrate that the West Kunlun Li-rich pegmatites were likely generated by melting of Li-rich claystone under amphibolite facies conditions, whereas the Li-poor pegmatites originated from typical metasedimentary sources. We propose that the involvement of Li-rich claystone into the middle to lower crust during collisional orogenesis was a key control on the formation of Li-rich pegmatites in the WKOB. This mechanism highlights the metallogenic significance of crustal-scale Li cycling and may be broadly applicable to rare metal pegmatite systems in other collisional orogenic belts.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"254 ","pages":"Article 105029"},"PeriodicalIF":4.0,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144897859","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":"Dramatically suppressed climate signals in the Yellow River","authors":"Yonggui Yu ,&nbsp;Rick J. Yang ,&nbsp;Gang Wang ,&nbsp;Jaap H. Nienhuis ,&nbsp;Xianyao Chen ,&nbsp;James T. Liu ,&nbsp;Marcel van der Perk ,&nbsp;Rens van Beek ,&nbsp;Xuefa Shi ,&nbsp;Shuqing Qiao ,&nbsp;Zhi Li ,&nbsp;Jay Lee ,&nbsp;Yuan-Pin Chang ,&nbsp;Hans Middelkoop","doi":"10.1016/j.gloplacha.2025.105020","DOIUrl":"10.1016/j.gloplacha.2025.105020","url":null,"abstract":"<div><div>Human activities have greatly changed the natural flow of mega rivers globally, with potentially devastating consequences for human and ecosystems. Previous budget and regime studies, however, have overlooked an important dimension of the changes that human disturbances can also suppress or even eliminate the natural climate signals archived in the river water-sediment periodicities. Here, using a 68-year basin-wide record, we quantify for the first time how much of natural climate signals has been lost in the Yellow River, China. Our results show that systematic engineering in the watershed between 1986 and 2019 has eliminated over 90 % of the monsoon signal and over 80 % of the El Niño/Southern Oscillation (ENSO)-Pacific Decadal Oscillation (PDO) signals from the Yellow River's hydrology in comparison with the period of 1952–1968, despite the powerful monsoon and ENSO-PDO that still drive basin-wide annual and multi-annual precipitation periodicities during this period. We conclude that the Yellow River has turned into a mega river with an anthropogenic flow regime. Such losses of natural climate signals represent an un-recognized aspect of decreasing ‘naturalness’ of mega rivers, which might also take place in other mega rivers in response to future human activities.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"254 ","pages":"Article 105020"},"PeriodicalIF":4.0,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892141","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":"‘Vampirious gamechanger’ — photodegradation changes the interpretation of the origin of polycyclic aromatic hydrocarbons in geological samples","authors":"Adam Zakrzewski,&nbsp;Marta Waliczek","doi":"10.1016/j.gloplacha.2025.105035","DOIUrl":"10.1016/j.gloplacha.2025.105035","url":null,"abstract":"<div><div>Despite minor sources being identified in phytoplankton and as a result of diagenetic processes, polycyclic aromatic hydrocarbons (PAHs) are well-established compounds, which are frequently used as combustion markers. The characteristic distributions of certain PAHs illustrated in several diagnostic plots are used to differentiate between pyrogenic and non-pyrogenic PAHs. These plots do not show the influence of photodegradation, which can hinder the proper interpretation of the origin of PAHs. Differences of up to three weeks in how PAHs resist photodegradation can change their distribution, leading to the coexistence of typically pyrogenic and non-pyrogenic indications. Despite its undoubted role, photodegradation was not discussed as a factor in modelling the distribution of PAHs within geological samples. The results of extensive molecular (GC–MS) and petrological surveys show that the analysed Early-Middle Jurassic (J₁-J₂) and Early Cretaceous (Cr₁) strata contain broad (2- to 7-ring) PAHs distributions, suggesting their pyrogenic origin, which is accompanied by the domination of inertinite group macerals. J₁-J₂ and Cr₁ strata are differentiated by the role of smoke-derived PAHs. LMW/Total ratio shows that smoke-derived PAHs are more common within the Cr₁ strata. Simultaneously, most Cr₁ strata are characterised by an unobvious distribution of 4-ring PAHs showing the coexistence of typically pyrogenic and non-pyrogenic values of the indicators used. The newly proposed fire temperature index shows that the average paleo-wildfire temperature was 273–425 °C with no differentiation between J₁-J₂ and Cr₁ strata. This means that photodegradation is an important factor controlling 4-ring PAHs distribution and that unobvious PAHs distribution can be interpreted as a signal from a significant amount of photodegraded, smoke-derived PAHs. Conducted analyses suggest that 5–7 ring PAHs were not photodegraded in a significant way.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"254 ","pages":"Article 105035"},"PeriodicalIF":4.0,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144890384","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":"Accelerated vegetation transformation in the World's highlands since the past 20 kyr","authors":"Dongliang Zhang ,&nbsp;Yinbo Li ,&nbsp;Blyakharchuk Tatiana","doi":"10.1016/j.gloplacha.2025.105037","DOIUrl":"10.1016/j.gloplacha.2025.105037","url":null,"abstract":"<div><div>Growing evidence underscores fundamental differences in vegetation succession and fire dynamics between global highlands (&gt;2000 m a.s.l.) and lowland regions, yet the temporal patterns and governing mechanisms of rates of vegetation compositional change (RoCs) in alpine systems remain poorly constrained. Through systematic analysis of 157 fossil pollen records and 143 charcoal sequences across six highlands (North America, Europe, Central Asia, South America, Africa and Tibetan Plateau), we identify two distinct phases of accelerated ecosystem reorganization: (1) an initial post-Last Glacial Maximum acceleration (∼18- ∼ 15 cal. Kyr BP) linked to postglacial recovery, and (2) a recent acceleration over the last millennium driven by anthropogenic landscape transformation. Structural equation modeling (SEM) reveals that RoCs drivers follow a tripartite climate-fire-human interaction pattern with marked regional disparities: fire effects depend on vegetation types and disturbance frequency; CO₂ fertilization is mediated by C₃/C₄ competition; and human activities progressively dominated late-Holocene dynamics via landscape structural modifications. This synthesis is the first to quantify the driving network of highland vegetation dynamics on a global scale through the integration of multiple indicators (pollen, charcoal) and SEM, providing paleoecological evidence for understanding the ecological vulnerability of alpine regions in the “Anthropocene”.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"254 ","pages":"Article 105037"},"PeriodicalIF":4.0,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144896620","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 expansion of phytoplankton utilizing CO2 concentrating mechanisms during the late Cambrian SPICE event","authors":"Haozhe Wang ,&nbsp;Limin Zhang ,&nbsp;Zhen Sun ,&nbsp;Hanyu Deng ,&nbsp;Guanyu Zhao ,&nbsp;Zewen Liao","doi":"10.1016/j.gloplacha.2025.105036","DOIUrl":"10.1016/j.gloplacha.2025.105036","url":null,"abstract":"<div><div>The Steptoean positive carbon isotope excursion (SPICE) event represents one of the most pronounced perturbations of the global carbon cycle during the Early Paleozoic, postdating the end-Marjuman extinction. Profound oceanographic and biological changes occurred during the SPICE event, yet the underlying mechanisms driving this isotopic excursion and its precise linkages to concurrent environmental and biotic changes remain unresolved. This study presents high-resolution geochemical data from the Wangcun section in South China, revealing coupled positive δ¹³C_carb and δ¹³C_org excursions and a negative δD_org shift. Multiple geochemical proxies confirm that these signatures preserve primary environmental signals rather than diagenetic artifacts. The SPICE event exhibits diachronous onset and variable magnitude across different depositional settings, challenging the notion of a globally synchronous anoxic event. These findings support the hypothesis that enhanced organic carbon burial and isotopic fractionation were potentially linked to the expansion of phytoplankton utilizing CO₂ concentrating mechanisms. The development of CO₂ concentrating mechanisms in phytoplankton may have played a pivotal role in modulating isotopic responses across depositional facies. This research provides new insights into the biogeochemical dynamics and evolutionary implications of the SPICE event, bridging the Cambrian Explosion and the Great Ordovician Biodiversification Event.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"254 ","pages":"Article 105036"},"PeriodicalIF":4.0,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893198","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}