Communications Earth & Environment最新文献_第10页

Impacts of agriculture and snow dynamics on catchment water balance in the U.S. and Great Britain 美国和英国农业和积雪动态对集水区水量平衡的影响

IF 8.1 1区地球科学

Communications Earth & Environment Pub Date : 2024-11-22 DOI: 10.1038/s43247-024-01891-w

Masoud Zaerpour, Shadi Hatami, André S. Ballarin, Wouter J. M. Knoben, Simon Michael Papalexiou, Alain Pietroniro, Martyn P. Clark

{"title":"Impacts of agriculture and snow dynamics on catchment water balance in the U.S. and Great Britain","authors":"Masoud Zaerpour, Shadi Hatami, André S. Ballarin, Wouter J. M. Knoben, Simon Michael Papalexiou, Alain Pietroniro, Martyn P. Clark","doi":"10.1038/s43247-024-01891-w","DOIUrl":"10.1038/s43247-024-01891-w","url":null,"abstract":"The Budyko water balance is a fundamental concept in hydrology that links aridity to how precipitation is divided between evapotranspiration and streamflow. While the model is powerful, its ability to explain temporal changes and the influence of human activities and climate change is limited. Here we introduce a causal discovery algorithm to explore deviations from the Budyko water balance, attributing them to human interventions such as agricultural activities and snow dynamics. Our analysis of 1342 catchments across the U.S. and Great Britain reveals distinct patterns: in the U.S., snow fraction and irrigation alter the Budyko water balance predominantly through changes in aridity-streamflow relationships, while in Great Britain, deviations are primarily driven by changes in precipitation-streamflow relationships, notable in catchments with high cropland percentage. By integrating causal analysis with the Budyko water balance, we enhance understanding of how human activities and climate dynamics affect water balance, offering insights for water management and sustainability in the Anthropocene. The U.S. Budyko water balance is influenced by snow fraction and irrigation, driving changes in aridity-streamflow dynamics, while deviations in Great Britain are driven by precipitation-streamflow dynamics, according to an analysis of 1,342 catchments.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":" ","pages":"1-14"},"PeriodicalIF":8.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43247-024-01891-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142694860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

National ecosystem restoration pledges are mismatched with social-ecological enabling conditions 国家生态系统恢复承诺与社会生态有利条件不匹配

IF 8.1 1区地球科学

Communications Earth & Environment Pub Date : 2024-11-22 DOI: 10.1038/s43247-024-01909-3

Felipe Benra, Maria Brück, Emily Sigman, Manuel Pacheco-Romero, Girma Shumi, David J. Abson, Marina Frietsch, Joern Fischer

{"title":"National ecosystem restoration pledges are mismatched with social-ecological enabling conditions","authors":"Felipe Benra, Maria Brück, Emily Sigman, Manuel Pacheco-Romero, Girma Shumi, David J. Abson, Marina Frietsch, Joern Fischer","doi":"10.1038/s43247-024-01909-3","DOIUrl":"10.1038/s43247-024-01909-3","url":null,"abstract":"Ecosystem restoration is widely recognized as a key strategy to address social-ecological challenges. National governments have pledged to restore millions of hectares of land. However, the ability to accomplish these pledges remains opaque, because restoration efforts are influenced by complex social-ecological factors. We provide a global analysis of national-level enabling and hindering conditions and their relation to restoration pledges undertaken by different nations. We developed an archetype characterization of within-country conditions using biophysical, socio-economic and governance indicators. Additionally, we investigated between-country conditions by examining flows of embodied land. Our analysis suggests that the countries with the most ambitious restoration pledges also tend to have the weakest enabling conditions (and vice versa). These results highlight the need to account for social, economic and governance factors alongside biophysical factors when considering where restoration ought to take place. Countries with more ambitious pledges for the restoration of their ecosystems tend to exhibit socio-economic, governance and biophysical conditions that may hinder meeting such pledges, suggests a global analysis of the enabling or hindering conditions for ecosystem restoration.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":" ","pages":"1-10"},"PeriodicalIF":8.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43247-024-01909-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Atlantic Meridional Overturning Circulation slowdown modulates wind-driven circulations in a warmer climate 大西洋经向翻转环流减慢调节气候变暖时的风动环流

IF 8.1 1区地球科学

Communications Earth & Environment Pub Date : 2024-11-21 DOI: 10.1038/s43247-024-01907-5

Mohima Sultana Mimi, Wei Liu

{"title":"Atlantic Meridional Overturning Circulation slowdown modulates wind-driven circulations in a warmer climate","authors":"Mohima Sultana Mimi, Wei Liu","doi":"10.1038/s43247-024-01907-5","DOIUrl":"10.1038/s43247-024-01907-5","url":null,"abstract":"Wind-driven and thermohaline circulations, two major components of global large-scale ocean circulations, are intrinsically related. As part of the thermohaline circulation, the Atlantic Meridional Overturning Circulation has been observed and is expected to decline over the twenty-first century, potentially modulating global wind-driven circulation. Here we perform coupled climate model experiments with either a slow or steady Atlantic overturning under anthropogenic warming to segregate its effect on wind-driven circulation. We find that the weakened Atlantic overturning generates anticyclonic surface wind anomalies over the subpolar North Atlantic to decelerate the gyre circulation there. Fingerprints of overturning slowdown are evident on Atlantic western boundary currents, encompassing a weaker northward Gulf Stream and Guiana Current and a stronger southward Brazil Current. Beyond the Atlantic, the weakened Atlantic overturning causes a poleward displacement of Southern Hemisphere surface westerly winds by changing meridional gradients of atmospheric temperature, leading to poleward shifts of the Antarctic Circumpolar Current and Southern Ocean meridional overturning circulations. Warmer climates weaken the Atlantic Meridional Overturning Circulation, causing anticyclonic surface wind anomalies in the subpolar North Atlantic, decelerating gyre circulation and affecting Atlantic western boundary currents, according to analysis of fully coupled climate model experiments under anthropogenic warming.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":" ","pages":"1-9"},"PeriodicalIF":8.1,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43247-024-01907-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Provincial inequalities in life cycle carbon dioxide emissions and air pollutants from electric vehicles in China 中国电动汽车生命周期二氧化碳和空气污染物的省际不平等

IF 8.1 1区地球科学

Communications Earth & Environment Pub Date : 2024-11-21 DOI: 10.1038/s43247-024-01906-6

Dingding Hu, Kaile Zhou, Rong Hu, Jingna Yang

{"title":"Provincial inequalities in life cycle carbon dioxide emissions and air pollutants from electric vehicles in China","authors":"Dingding Hu, Kaile Zhou, Rong Hu, Jingna Yang","doi":"10.1038/s43247-024-01906-6","DOIUrl":"10.1038/s43247-024-01906-6","url":null,"abstract":"It is still unclear whether emissions reductions from electric vehicles can be achieved across different regions from a lifecycle perspective. Here we use the life cycle assessment model and Quasi Input-Output model to evaluate the carbon dioxide emissions and air pollutants of internal combustion engine vehicles, plug-in hybrid electric vehicles, and battery electric vehicles in different provinces of China, with the provincial electricity consumption data and the sales data of electric vehicles. We find that battery electric vehicles have achieved 11.8% and 1.1% reduction in carbon dioxide and nitrogen oxide emissions, respectively, compared to internal combustion engine vehicles. In contrast, the emissions of sulfur dioxide and particulate matter 2.5 increased by 10% and 20%, respectively. Due to the coal-based power generation structure and the cold weather, the emission intensity of battery electric vehicles in most northern provinces is higher than that in southern provinces. From 2020 to 2030, improving technological progress and optimizing electricity mix will greatly assist in achieving emissions reduction. The results can help policy-makers better understand the emission characteristics and reasonably plan future emission reduction strategies in transportation. The emission intensities of carbon dioxide and air pollutants from battery electric vehicles are high in northern provinces of China due to the coal-based electricity mix and cold weather, according to an analysis that uses a life cycle assessment model and data on electricity generation.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":" ","pages":"1-12"},"PeriodicalIF":8.1,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43247-024-01906-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A conceptual model explaining spatial variation in soil nitrous oxide emissions in agricultural fields 解释农田土壤一氧化二氮排放量空间变化的概念模型

IF 8.1 1区地球科学

Communications Earth & Environment Pub Date : 2024-11-21 DOI: 10.1038/s43247-024-01875-w

Ziliang Zhang, William C. Eddy III, Emily R. Stuchiner, Evan H. DeLucia, Wendy H. Yang

{"title":"A conceptual model explaining spatial variation in soil nitrous oxide emissions in agricultural fields","authors":"Ziliang Zhang, William C. Eddy III, Emily R. Stuchiner, Evan H. DeLucia, Wendy H. Yang","doi":"10.1038/s43247-024-01875-w","DOIUrl":"10.1038/s43247-024-01875-w","url":null,"abstract":"Soil emissions of nitrous oxide contribute substantially to global warming from agriculture. Spatiotemporal variation in nitrous oxide emissions within agricultural fields leads to uncertainty in the benefits of climate-smart agricultural practices. Here, we present a conceptual model explaining spatial variation in temporal patterns of soil nitrous oxide emissions developed from high spatial resolution measurements of soil nitrous oxide emissions, gross nitrous oxide fluxes, and soil physicochemical properties in two maize fields in Illinois, USA. In sub-field locations with consistently low nitrous oxide emissions, soil nitrate and dissolved organic carbon constrained nitrous oxide production irrespective of changes in soil moisture. In sub-field locations where high emissions occurred episodically, soil nitrate and dissolved organic carbon availability were higher, and increases in soil moisture stimulated nitrous oxide production. These findings form the ‘cannon model’ which conceptualizes how sub-field scale variation in soil nitrate and dissolved organic carbon determines where increases in soil moisture can trigger high soil nitrous oxide emissions within agricultural fields. Only in areas of agricultural fields where nitrate and dissolved organic carbon availability were high could soil moisture stimulate high nitrous oxide emissions, according to a conceptual model based on spatial measurements of emissions and soil properties.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":" ","pages":"1-11"},"PeriodicalIF":8.1,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43247-024-01875-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Migrating subaqueous dunes capture clay flocs 移动的水下沙丘捕获粘土絮状物

IF 8.1 1区地球科学

Communications Earth & Environment Pub Date : 2024-11-21 DOI: 10.1038/s43247-024-01901-x

Sjoukje I. de Lange, Anne van der Wilk, Claire Chassagne, Waqas Ali, Maximilian P. Born, Kristian Brodersen, Antonius J. F. Hoitink, Kryss Waldschläger

{"title":"Migrating subaqueous dunes capture clay flocs","authors":"Sjoukje I. de Lange, Anne van der Wilk, Claire Chassagne, Waqas Ali, Maximilian P. Born, Kristian Brodersen, Antonius J. F. Hoitink, Kryss Waldschläger","doi":"10.1038/s43247-024-01901-x","DOIUrl":"10.1038/s43247-024-01901-x","url":null,"abstract":"Recent research highlights the abundance of floccule (flocs) in rivers, formed by aggregation of clay particles with organic matter. These flocs affect the transport and the eventual fate of clay. Flocs exhibit distinct behaviour from the unflocculated sedimentary counterparts: they can deform and break, and have higher settling velocities, which may in turn cause flocs to deposit and possibly interact with the riverbed. Here, we conducted systematic experiments in a laboratory flume to identify the mechanisms by which flocs and bedforms interact. Flocs showed a saltating (bouncing) behaviour, and were incorporated in the sediment bed as single flocs, clusters, or strings, via deposition and burial in the lee of a dune. Dune geometry was negligibly impacted by the presence of flocs. In natural systems, the burial of flocculated clay particles can affect contaminant spreading, aquatic ecology, the interpretation of deposition patterns, and clay transport. Flocculated clay particles exhibit a bouncing behaviour and can be incorporated into the bed as single flocs, clusters, or strings and revealing significant implications for contaminant transport and ecological dynamics in rivers, according to laboratory flume experiment results.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":" ","pages":"1-12"},"PeriodicalIF":8.1,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43247-024-01901-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142680010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The climatic pattern of East Asia shifted in response to cratonic thinning in the Early Cretaceous 东亚的气候模式因早白垩世板块构造变薄而发生变化

IF 8.1 1区地球科学

Communications Earth & Environment Pub Date : 2024-11-21 DOI: 10.1038/s43247-024-01841-6

Wenbo Wang, Xu Chu, Jian Zhang, Ying Cui, Xuegen Chen, Yue Wang, Shangguo Su

{"title":"The climatic pattern of East Asia shifted in response to cratonic thinning in the Early Cretaceous","authors":"Wenbo Wang, Xu Chu, Jian Zhang, Ying Cui, Xuegen Chen, Yue Wang, Shangguo Su","doi":"10.1038/s43247-024-01841-6","DOIUrl":"10.1038/s43247-024-01841-6","url":null,"abstract":"In response to westward subduction of the Paleo-Pacific, the North China Craton experienced the uplift of an eastern coastal plateau followed by subsidence in the Early Cretaceous, which potentially drove a shift in climatic patterns. Here we use the oxygen isotope ratios of garnets from magmatic-hydrothermal ore systems to infer the origins and signatures of mineralization fluids during this tectonic transition. The garnet oxygen isotope values range from approximately –11.4 to +13.5‰, with extremely depleted oxygen isotope ratios exclusively found in the northern margin, indicating extensive involvement of meteoric and lacustrine fluid in the back-arc hinterland. This geological record aligns with climate modeling exhibiting that the coastal plateau amplified northeastward transport of moisture from tropical Tethyan Ocean. The long-distance transport strongly depleted 18O and 2H (D). As the cratonic lithosphere thinned and the plateau subsided, the Pacific influences began to dominate the climatic pattern of East Asia. Regional climate of East Asia shifted in the Early Cretaceous in response to tectonic collapse of a coastal plateau and an increase in moisture sourced from the Pacific Ocean, according to geochemical data from skarn garnets sampled across the North China Craton, and climate models.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":" ","pages":"1-8"},"PeriodicalIF":8.1,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43247-024-01841-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Satellite observations indicate slower recovery of woody components compared to upper-canopy and leaves in tropical rainforests after drought 卫星观测结果表明，热带雨林干旱后木质成分的恢复速度慢于树冠上部和树叶的恢复速度

IF 8.1 1区地球科学

Communications Earth & Environment Pub Date : 2024-11-20 DOI: 10.1038/s43247-024-01892-9

Yujie Dou, Feng Tian, Jean-Pierre Wigneron, Xiaojun Li, Wenmin Zhang, Yaoliang Chen, Luwei Feng, Qi Xie, Rasmus Fensholt

{"title":"Satellite observations indicate slower recovery of woody components compared to upper-canopy and leaves in tropical rainforests after drought","authors":"Yujie Dou, Feng Tian, Jean-Pierre Wigneron, Xiaojun Li, Wenmin Zhang, Yaoliang Chen, Luwei Feng, Qi Xie, Rasmus Fensholt","doi":"10.1038/s43247-024-01892-9","DOIUrl":"10.1038/s43247-024-01892-9","url":null,"abstract":"The 2015–2016 El Niño-induced drought caused biomass loss in global tropical forests, yet the recovery duration of different vegetation components (woody components, upper canopies, and leaves) remains unknown. Here, we use satellite remote sensing data of vegetation optical depth and leaf area index, with varying sensitivity to different vegetation components, to examine vegetation recovery during the drought event. We find that the woody component had the slowest recovery compared to the upper canopy and leaves, and displayed greater spatial variability between continents. Key factors influencing woody recovery include drought severity, moisture-related climatic conditions (i.e., vapor pressure deficit, precipitation, and soil moisture), and seasonal variations in temperature and precipitation. Our study highlights the importance of different vegetation components for maintaining ecosystem balance under drought disturbances and indicates the need for further research to explore recovery mechanisms and the long-term impacts of drought on forest dynamics. Woody components of tropical forests have a slower recovery rate from severe drought compared to upper canopies and leaves, according to multiple remote sensing observations across the tropics during the El Niño-induced drought of 2015-2016","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":" ","pages":"1-10"},"PeriodicalIF":8.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43247-024-01892-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Understanding the drivers and predictability of record low Antarctic sea ice in austral winter 2023 了解 2023 年冬季南极海冰创新低的驱动因素和可预测性

IF 8.1 1区地球科学

Communications Earth & Environment Pub Date : 2024-11-20 DOI: 10.1038/s43247-024-01772-2

Zachary I. Espinosa, Edward Blanchard-Wrigglesworth, Cecilia M. Bitz

{"title":"Understanding the drivers and predictability of record low Antarctic sea ice in austral winter 2023","authors":"Zachary I. Espinosa, Edward Blanchard-Wrigglesworth, Cecilia M. Bitz","doi":"10.1038/s43247-024-01772-2","DOIUrl":"10.1038/s43247-024-01772-2","url":null,"abstract":"Since the start of the satellite record in 1978, the three lowest summertime minima in Antarctic sea ice area all occurred within the last seven years and culminated in record low sea ice in austral winter 2023. During this period sea ice area was over 2 million km2 below climatology, a 5 sigma anomaly and 0.9 million km2 below the previous largest seasonal anomaly. Here we show that a fully-coupled Earth System Model nudged to observed winds reproduces the record low, and that the 2023 transition from La Niña to El Niño had minimal impact. Using an ensemble, we demonstrate that  ~ 70% of the anomaly was predictable six months in advance and driven by warm Southern Ocean conditions that developed prior to 2023, with the remaining  ~ 30% attributable to 2023 atmospheric circulation. An ensemble forecast correctly predicted that near record low sea ice would persist in austral winter 2024, due to persistent warm Southern Ocean conditions. 70% of the Antarctic sea ice area’s record low anomaly in 2023 was due to warm Southern Ocean sea surface temperatures, while 30% was due to atmospheric circulation, and the transition from La Niña to El Niño had minimal impact, according to results from a fully-coupled Earth system model nudged to observed atmospheric circulation.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":" ","pages":"1-9"},"PeriodicalIF":8.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43247-024-01772-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The molybdenum cycle in the oxygenated Neoproterozoic ocean was coupled to manganese carbonate mineralization 新近新生代含氧海洋中的钼循环与碳酸锰矿化密切相关

IF 8.1 1区地球科学

Communications Earth & Environment Pub Date : 2024-11-20 DOI: 10.1038/s43247-024-01897-4

Bin Zhang, Jian Cao, Kai Hu, Zhiwei Liao, Ruijie Zhang, Yi Zhang, Chunhua Shi, Kurt O. Konhauser

{"title":"The molybdenum cycle in the oxygenated Neoproterozoic ocean was coupled to manganese carbonate mineralization","authors":"Bin Zhang, Jian Cao, Kai Hu, Zhiwei Liao, Ruijie Zhang, Yi Zhang, Chunhua Shi, Kurt O. Konhauser","doi":"10.1038/s43247-024-01897-4","DOIUrl":"10.1038/s43247-024-01897-4","url":null,"abstract":"The Neoproterozoic oxygenation event is a milestone in Earth’s history, yet the redox structure and elemental cycling of the Neoproterozoic ocean remain debated. Here, we investigated iron speciation, molybdenum, and nitrogen isotopes in black shales and manganese carbonates from the upper Ediacaran Doushantuo Formation, South China, to examine the links between redox state, manganese mineralization, and molybdenum cycling. In both lithologies, high pyritic iron ratios (> 0.8) indicate a localized euxinic zone, while estimated seawater molybdenum (1.9‰) and sediment nitrogen isotopic compositions (4.19 ± 1.96‰) resemble modern values, suggesting oxygenated surface waters over euxinic depths. Negative molybdenum isotope in manganese(II) carbonates points to manganese(IV) oxide reduction, acting as a molybdenum shuttle from oxygenated surface to euxinic deep waters. Periodic euxinic contractions drove manganese(II) oxidation and mineralization, shaping molybdenum cycling. This study highlights essential manganese(II) oxidation for manganese carbonate mineralization and offers new insights into molybdenum geochemistry and ancient ocean oxygenation events. The periodic contraction of euxinic zones in the Neoproterozoic Ocean shaped the mineralization of manganese and the oceanic molybdenum cycle, according to iron, molybdenum and nitrogen geochemical data from back shales and carbonates in the upper Doushantuo Formation, South China.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":" ","pages":"1-10"},"PeriodicalIF":8.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43247-024-01897-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142680003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0