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Earth’s silicate weathering continuum 地球的硅酸盐风化连续体
IF 16.1 1区 地球科学
Nature Geoscience Pub Date : 2025-08-07 DOI: 10.1038/s41561-025-01743-y
Gerrit Trapp-Müller, Jeremy Caves Rugenstein, Daniel J. Conley, Sonja Geilert, Mathilde Hagens, Wei-Li Hong, Catherine Jeandel, Jack Longman, Paul R. D. Mason, Jack J. Middelburg, Kitty L. Milliken, Alexis Navarre-Sitchler, Noah J. Planavsky, Gert-Jan Reichart, Caroline P. Slomp, Appy Sluijs, Douwe J. J. van Hinsbergen, Xu Y. Zhang
{"title":"Earth’s silicate weathering continuum","authors":"Gerrit Trapp-Müller, Jeremy Caves Rugenstein, Daniel J. Conley, Sonja Geilert, Mathilde Hagens, Wei-Li Hong, Catherine Jeandel, Jack Longman, Paul R. D. Mason, Jack J. Middelburg, Kitty L. Milliken, Alexis Navarre-Sitchler, Noah J. Planavsky, Gert-Jan Reichart, Caroline P. Slomp, Appy Sluijs, Douwe J. J. van Hinsbergen, Xu Y. Zhang","doi":"10.1038/s41561-025-01743-y","DOIUrl":"10.1038/s41561-025-01743-y","url":null,"abstract":"Chemical weathering of silicate rocks redistributes major, minor and trace elements through coupled dissolution–precipitation reactions. These weathering processes drive shifts in ocean acid–base chemistry, modulating atmospheric carbon dioxide levels and providing a stabilizing feedback in the carbon cycle. Silicate weathering occurs in both terrestrial and marine environments, releasing (‘forward’) or consuming alkalinity (‘reverse’), but these have largely been perceived as independent and studied in isolation. However, weathering products are transported downstream across terrestrial and to marine environments, suggesting a dynamic coupling of these weathering processes across scales. Here we propose that the Earth’s silicate weathering occurs along a continuum linking mountains to the deepest sedimentary environments and forward to reverse weathering. In this framework, the magnitude and direction of a local weathering flux depends on the materials’ origin, weathering–erosion history and environmental conditions. Consequently, global silicate weathering fluxes and the long-term carbon cycle feedback may be governed by the dynamic interplay of various environments along the silicate weathering continuum. Chemical weathering of silicate rocks occurs along a continuum from terrestrial to marine environments.","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"18 8","pages":"691-701"},"PeriodicalIF":16.1,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144796996","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}
引用次数: 0
Coastal methane emissions driven by aerotolerant methanogens using seaweed and seagrass metabolites 利用海藻和海草代谢物的耐氧产甲烷菌驱动的沿海甲烷排放
IF 16.1 1区 地球科学
Nature Geoscience Pub Date : 2025-08-07 DOI: 10.1038/s41561-025-01768-3
N. Hall, W. W. Wong, R. Lappan, F. Ricci, K. J. Jeppe, R. N. Glud, S. Kawaichi, A-E. Rotaru, C. Greening, P. L. M. Cook
{"title":"Coastal methane emissions driven by aerotolerant methanogens using seaweed and seagrass metabolites","authors":"N. Hall, W. W. Wong, R. Lappan, F. Ricci, K. J. Jeppe, R. N. Glud, S. Kawaichi, A-E. Rotaru, C. Greening, P. L. M. Cook","doi":"10.1038/s41561-025-01768-3","DOIUrl":"10.1038/s41561-025-01768-3","url":null,"abstract":"Methanogenesis is thought to be limited to strictly anoxic environments. While oxygenated oceans are a known methane source, it is argued that methane production is driven by methylphosphonate-degrading bacteria and potentially other sources rather than by methanogenic archaea. Here we develop in situ monitoring and ex situ manipulation experiments, combined with biogeochemical, metagenomic and culture-based experiments, to show that methane is rapidly produced by archaea in frequently oxygenated sandy sediments. We show that methane emissions from sandy sediments are not inhibited by repeated oxygen exposure and suggest the activity is driven by aerotolerant methylotrophic methanogens (primarily Methanosarcinaceae) broadly distributed in the surface layers of sandy sediments. Moreover, we show that methane emissions are driven by methylated seaweed and seagrass metabolites, revealing a feedback loop between primary production and greenhouse gas emissions. Experiments suggest aerotolerant archaea produce methane in the surface layers of coastal sandy sediments and that this activity is driven by seaweed and seagrass metabolites.","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"18 9","pages":"854-861"},"PeriodicalIF":16.1,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41561-025-01768-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144792714","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
Elevated shallow water salinity in the deglacial Indian Ocean was sourced from the deep 去冰期印度洋浅水盐度的升高来源于深海
IF 16.1 1区 地球科学
Nature Geoscience Pub Date : 2025-08-06 DOI: 10.1038/s41561-025-01756-7
Ryan H. Glaubke, Elisabeth L. Sikes, Sindia M. Sosdian, Natalie E. Umling, Aidan Starr, Paola L. Moffa-Sanchez, Matthew W. Schmidt
{"title":"Elevated shallow water salinity in the deglacial Indian Ocean was sourced from the deep","authors":"Ryan H. Glaubke, Elisabeth L. Sikes, Sindia M. Sosdian, Natalie E. Umling, Aidan Starr, Paola L. Moffa-Sanchez, Matthew W. Schmidt","doi":"10.1038/s41561-025-01756-7","DOIUrl":"10.1038/s41561-025-01756-7","url":null,"abstract":"Along the northern rim of the Southern Ocean, the transformation of upwelled deep waters into less-dense Subantarctic Mode Waters forms a critical link between the deep and shallow layers of the global ocean. In the Indian sector, mode waters comprise a key component of Agulhas Leakage, which today conveys salt to the Atlantic basin necessary for sustaining deep water formation. The salinity of Indian-sourced mode waters may therefore represent an upstream influence on Atlantic overturning, with implications for global climate. Here we reconstructed the temperature and salinity of these waters across the Last Deglaciation using the geochemistry of two planktic foraminiferal species from a south Indian Ocean sediment core. Approximately 20,000 years ago (~20 ka), deglaciation was marked by an abrupt ~2–2.6 practical salinity unit increase that persisted until ~16 ka. This event coincided with an increase in water mass age reconstructed from the same core. We argue this coherence is evidence for an aged, salty glacial bottom water mass that, once upwelled, modified the salinity of Indian-sourced mode water. Model experiments suggest this salt had the potential, if leaked into the Atlantic, to nudge overturning towards its modern-day configuration, highlighting an underappreciated deep ocean influence on the deglacial dynamics. Increased salinity of Subantarctic Mode Water during the initial phase of the Last Deglaciation could have enhanced deep water formation in the North Atlantic, according to proxy records from a sediment core in the southern Indian Ocean.","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"18 9","pages":"893-900"},"PeriodicalIF":16.1,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144786689","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}
引用次数: 0
Deglaciation drove seawater infiltration and slowed submarine groundwater discharge 冰川消融推动海水入渗,减缓海底地下水排放
IF 16.1 1区 地球科学
Nature Geoscience Pub Date : 2025-08-06 DOI: 10.1038/s41561-025-01750-z
S. ten Hietbrink, H. Patton, B. Dugan, B. Szymczycha, A. Sen, A. Lepland, J. Knies, J.-H. Kim, N.-C. Chen, W.-L. Hong
{"title":"Deglaciation drove seawater infiltration and slowed submarine groundwater discharge","authors":"S. ten Hietbrink, H. Patton, B. Dugan, B. Szymczycha, A. Sen, A. Lepland, J. Knies, J.-H. Kim, N.-C. Chen, W.-L. Hong","doi":"10.1038/s41561-025-01750-z","DOIUrl":"10.1038/s41561-025-01750-z","url":null,"abstract":"Submarine groundwater discharge—the flow of groundwater into the ocean—plays an important role in shaping coastal biogeochemical cycles. The absence of temporal constraints on offshore groundwater dynamics driven by proximal glacial loading hinders our assessment of how its circulation may vary in conceivable ice-free polar regions. Here we estimate residence times of saline groundwater at an active submarine groundwater discharge and methane seep site off the coast of northern Norway, near the continental shelf break. The subsurface hydrology in this area experienced drastic changes due to Fennoscandian Ice Sheet dynamics, offering insights into the consequences of glacial–interglacial transitions for offshore groundwater. Using radiocarbon dating of dissolved inorganic carbon in the upwards-advected groundwater, we determined saline groundwater residence times of 11.5 to 8.8 kyr and 4.8 to 2.6 kyr at two distinct discharge sites. The presence of a meteoric water component in sediment porewaters confirms offshore groundwater freshening driven by past glacial loading. This indicates that, as the ice sheet retreated and sea levels rose, seawater began to infiltrate the subsurface, replacing freshwater recharge. Our results provide observational evidence pinpointing the onset of seawater infiltration following deglaciation of the margin. These findings suggest that retreating marine-terminating glaciers will profoundly alter offshore groundwater composition and reduce discharge rates. The retreat of the Fennoscandian Ice Sheet during the last deglaciation led to the infiltration of seawater into a submarine groundwater system on the Norwegian continental shelf, according to an analysis of groundwater geochemistry on the Norwegian shelf.","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"18 8","pages":"779-786"},"PeriodicalIF":16.1,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41561-025-01750-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144786690","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
Contribution of lake littoral zones to the continental carbon budget 湖滨带对大陆碳收支的贡献
IF 16.1 1区 地球科学
Nature Geoscience Pub Date : 2025-08-04 DOI: 10.1038/s41561-025-01739-8
Charlotte Grasset, Jorrit P. Mesman, Lars J. Tranvik, Roxane Maranger, Sebastian Sobek
{"title":"Contribution of lake littoral zones to the continental carbon budget","authors":"Charlotte Grasset, Jorrit P. Mesman, Lars J. Tranvik, Roxane Maranger, Sebastian Sobek","doi":"10.1038/s41561-025-01739-8","DOIUrl":"10.1038/s41561-025-01739-8","url":null,"abstract":"In the littoral zone, at the land–water interface of lakes, the areal productivity of aquatic vegetation rivals that of rainforests, resulting in a potentially very high carbon (C) turnover. Whereas tidal wetlands at the land–ocean interface are included in global C budgets, lake littoral zones are currently not accounted for, despite the total shoreline of lakes being estimated at four times longer than that of the global ocean. Here we quantify the littoral net atmospheric C sink using mass balance and a model of C export from the littoral to the pelagic zone. We argue that ignoring littoral C turnover in lakes potentially results in biased estimates of continental C cycling. In our global estimate, we show that the estimated global C balance of lakes may reverse from a net C source to a net C sink (that is, net C burial > net C outgassing). In addition, a large part of the C outgassed in the pelagic might originate from the littoral, implying that previous estimates of terrestrial C inputs to inland waters were too high. We argue that quantifying and modelling lake littoral C fluxes are essential to more accurately estimate the feedback between the continents and climate. The land–water interface of lakes is highly vegetated and may reverse the global carbon balance of lakes from a net source to a net sink, according to a mass balance and horizontal transport model quantification of lake littoral zones.","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"18 8","pages":"747-752"},"PeriodicalIF":16.1,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41561-025-01739-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144769908","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
Author Correction: Enhanced ocean CO2 uptake due to near surface temperature gradients 作者更正:由于近地表温度梯度,海洋二氧化碳吸收增强
IF 16.1 1区 地球科学
Nature Geoscience Pub Date : 2025-08-04 DOI: 10.1038/s41561-025-01779-0
Daniel J. Ford, Jamie D. Shutler, Javier Blanco-Sacristán, Sophie Corrigan, Thomas G. Bell, Mingxi Yang, Vassilis Kitidis, Philip D. Nightingale, Ian Brown, Werenfrid Wimmer, David K. Woolf, Tânia Casal, Craig Donlon, Gavin H. Tilstone, Ian Ashton
{"title":"Author Correction: Enhanced ocean CO2 uptake due to near surface temperature gradients","authors":"Daniel J. Ford, Jamie D. Shutler, Javier Blanco-Sacristán, Sophie Corrigan, Thomas G. Bell, Mingxi Yang, Vassilis Kitidis, Philip D. Nightingale, Ian Brown, Werenfrid Wimmer, David K. Woolf, Tânia Casal, Craig Donlon, Gavin H. Tilstone, Ian Ashton","doi":"10.1038/s41561-025-01779-0","DOIUrl":"10.1038/s41561-025-01779-0","url":null,"abstract":"","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"18 9","pages":"923-925"},"PeriodicalIF":16.1,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41561-025-01779-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144778487","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
Major excursions in sulfur isotopes linked to permafrost change in Eurasia during the last 50,000 years 硫同位素在过去5万年中与欧亚大陆永久冻土变化有关的重大偏移
IF 18.3 1区 地球科学
Nature Geoscience Pub Date : 2025-08-01 DOI: 10.1038/s41561-025-01760-x
Rhiannon E. Stevens, Hazel Reade, Kerry L. Sayle, Jennifer A. Tripp, Delphine Frémondeau, Adrian Lister, Ian Barnes, Mietje Germonpré, Martin Street, Julian B. Murton, Simon H. Bottrell, Daniel H. James, Thomas F. G. Higham
{"title":"Major excursions in sulfur isotopes linked to permafrost change in Eurasia during the last 50,000 years","authors":"Rhiannon E. Stevens, Hazel Reade, Kerry L. Sayle, Jennifer A. Tripp, Delphine Frémondeau, Adrian Lister, Ian Barnes, Mietje Germonpré, Martin Street, Julian B. Murton, Simon H. Bottrell, Daniel H. James, Thomas F. G. Higham","doi":"10.1038/s41561-025-01760-x","DOIUrl":"https://doi.org/10.1038/s41561-025-01760-x","url":null,"abstract":"<p>We identify a major sulfur isotope excursion in Eurasian faunal bone collagen from the last 50,000 years, here termed the Late Pleniglacial Sulfur Excursion. Our analysis suggests this is linked to changing permafrost conditions, presenting the utility of faunal collagen δ<sup>34</sup>S as a proxy for permafrost dynamics, a critical component of the global carbon cycle. Our findings complicate the use of archaeological faunal sulfur isotopes for mobility and palaeodietary studies.</p>","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"28 1","pages":""},"PeriodicalIF":18.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144756564","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}
引用次数: 0
Widespread underestimation of rain-induced soil carbon emissions from global drylands 全球旱地雨水引起的土壤碳排放普遍低估
IF 16.1 1区 地球科学
Nature Geoscience Pub Date : 2025-07-31 DOI: 10.1038/s41561-025-01754-9
Ngoc B. Nguyen, Mirco Migliavacca, Maoya Bassiouni, Dennis D. Baldocchi, Laureano A. Gherardi, Julia K. Green, Dario Papale, Markus Reichstein, Kai-Hendrik Cohrs, Alessandro Cescatti, Tuan Dung Nguyen, Hoang H. Nguyen, Quang Minh Nguyen, Trevor F. Keenan
{"title":"Widespread underestimation of rain-induced soil carbon emissions from global drylands","authors":"Ngoc B. Nguyen,&nbsp;Mirco Migliavacca,&nbsp;Maoya Bassiouni,&nbsp;Dennis D. Baldocchi,&nbsp;Laureano A. Gherardi,&nbsp;Julia K. Green,&nbsp;Dario Papale,&nbsp;Markus Reichstein,&nbsp;Kai-Hendrik Cohrs,&nbsp;Alessandro Cescatti,&nbsp;Tuan Dung Nguyen,&nbsp;Hoang H. Nguyen,&nbsp;Quang Minh Nguyen,&nbsp;Trevor F. Keenan","doi":"10.1038/s41561-025-01754-9","DOIUrl":"10.1038/s41561-025-01754-9","url":null,"abstract":"Dryland carbon fluxes, particularly those driven by ecosystem respiration, are highly sensitive to water availability and rain pulses. However, the magnitude of rain-induced carbon emissions remains unclear globally. Here we quantify the impact of rain-pulse events on the carbon balance of global drylands and characterize their spatiotemporal controls. Using eddy-covariance observations of carbon, water and energy fluxes from 34 dryland sites worldwide, we produce an inventory of over 1,800 manually identified rain-induced CO2 pulse events. Based on this inventory, a machine learning algorithm is developed to automatically detect rain-induced CO2 pulse events. Our findings show that existing partitioning methods underestimate ecosystem respiration and photosynthesis by up to 30% during rain-pulse events, which annually contribute 16.9 ± 2.8% of ecosystem respiration and 9.6 ± 2.2% of net ecosystem productivity. We show that the carbon loss intensity correlates most strongly with annual productivity, aridity and soil pH. Finally, we identify a universal decay rate of rain-induced CO2 pulses and use it to bias-correct respiration estimates. Our research highlights the importance of rain-induced carbon emissions for the carbon balance of global drylands and suggests that ecosystem models may largely underrepresent the influence of rain pulses on the carbon cycle of drylands. Eddy-covariance observations suggest that rain pulses over global drylands drive substantial soil carbon emissions, which are underestimated in current measurement and modelling approaches.","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"18 9","pages":"869-876"},"PeriodicalIF":16.1,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41561-025-01754-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144747399","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
Limited carbon sequestration potential from global ecosystem restoration 全球生态系统恢复的碳封存潜力有限
IF 16.1 1区 地球科学
Nature Geoscience Pub Date : 2025-07-31 DOI: 10.1038/s41561-025-01742-z
Csaba Tölgyesi, Nándor Csikós, Vicky M. Temperton, Elise Buisson, Fernando A. O. Silveira, Caroline E. R. Lehmann, Péter Török, Zoltán Bátori, Ákos Bede-Fazekas
{"title":"Limited carbon sequestration potential from global ecosystem restoration","authors":"Csaba Tölgyesi,&nbsp;Nándor Csikós,&nbsp;Vicky M. Temperton,&nbsp;Elise Buisson,&nbsp;Fernando A. O. Silveira,&nbsp;Caroline E. R. Lehmann,&nbsp;Péter Török,&nbsp;Zoltán Bátori,&nbsp;Ákos Bede-Fazekas","doi":"10.1038/s41561-025-01742-z","DOIUrl":"10.1038/s41561-025-01742-z","url":null,"abstract":"Ecosystem restoration is increasingly recognized as a means of climate change mitigation. Recent global-scale studies have suggested that ecosystem restoration could offset a substantial fraction of human carbon emissions since the Industrial Revolution. However, global carbon sequestration potential remains uncertain due to the tree-centric view of some models and difficulties in modelling restoration across different ecosystem types. Here we applied a model-based prediction workflow to estimate the carbon capture potential of restoring forest, shrubland, grassland and wetland ecosystems until 2100. We found that the maximum sequestration potential is 96.9 Gt of carbon, equivalent to 17.6% of the anthropogenic emissions to date, or 3.7–12.0% if taking into account future emissions until 2100. Our results suggest that ecosystem restoration has limited potential for climate change mitigation even if orchestrated with a pervasive shift towards sustainable, low-emissions economies globally. In addition, if we plan restoration targets to match future climatic conditions and consider state transitions of currently natural ecosystems due to climate change, the potential for natural climate solutions related to ecosystem restoration is close to zero. Therefore, we recommend that ecosystem restoration is pursued primarily for restoring biodiversity, supporting livelihoods and resilience of ecosystem services, as the climate mitigation potential will vary depending on the state transitions that occur between vegetation types. The maximum carbon sequestration potential from global terrestrial ecosystem restoration efforts until 2100 is 96.9 Gt, which is equivalent to 3.7–12.0% of anthropogenic emissions until then, according to model projections.","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"18 8","pages":"761-768"},"PeriodicalIF":16.1,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41561-025-01742-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144747451","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
Warmer shallow Atlantic during deglaciation and early Holocene due to weaker overturning circulation 在去冰期和全新世早期,由于较弱的翻转环流,大西洋浅层变暖
IF 16.1 1区 地球科学
Nature Geoscience Pub Date : 2025-07-31 DOI: 10.1038/s41561-025-01751-y
Wanyi Lu, Delia W. Oppo, Zhengyu Liu, Chenyu Zhu, Alan Condron, Jean Lynch-Stieglitz, Weifu Guo, Anya V. Hess, Shouyi Wang
{"title":"Warmer shallow Atlantic during deglaciation and early Holocene due to weaker overturning circulation","authors":"Wanyi Lu,&nbsp;Delia W. Oppo,&nbsp;Zhengyu Liu,&nbsp;Chenyu Zhu,&nbsp;Alan Condron,&nbsp;Jean Lynch-Stieglitz,&nbsp;Weifu Guo,&nbsp;Anya V. Hess,&nbsp;Shouyi Wang","doi":"10.1038/s41561-025-01751-y","DOIUrl":"10.1038/s41561-025-01751-y","url":null,"abstract":"Model simulations project that the Atlantic Meridional Overturning Circulation (AMOC) will weaken in response to global warming, but with large uncertainty. The past 20 kyr are a prime target for model validation, as boundary conditions are reasonably well known, and the AMOC and climate experienced dramatic changes during this period. Here we present eight subsurface Atlantic temperature reconstructions based on benthic foraminiferal magnesium-to-lithium ratios, and compare the timing and amplitude of reconstructed changes with those in two coupled climate model simulations. We show that compared with the last glaciation and the past 8 kyr, the shallow (~500–1,100 m water depth) tropical North Atlantic was anomalously warm during most of the last deglaciation and early Holocene, which the models suggest is due to a relatively weak AMOC that reduced advection and allowed heat to accumulate. Our temperature reconstructions imply that the AMOC strengthened ~14.7 kyr ago and during the early Holocene (from ~12 to 8 kyr ago), suggesting that enhanced northward heat transport contributed to Northern Hemisphere warming and deglacial melting at these times. The transient model simulations predict features of temperature reconstruction with varying success, possibly because deglacial and Holocene AMOC strength are poorly constrained, and not accurately simulated. A build-up of warm water in the shallow tropical Atlantic during the last deglaciation and early Holocene probably resulted from intervals of weaker Atlantic Meridional Overturning Circulation, according to proxy records and model simulations.","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"18 8","pages":"787-792"},"PeriodicalIF":16.1,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144747400","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}
引用次数: 0
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