Nature Geoscience最新文献

Human footprint on estuarine tidal hydrodynamics 河口潮汐流体动力学上的人类足迹

IF 18.3 1区地球科学

Nature Geoscience Pub Date : 2026-04-24 DOI: 10.1038/s41561-026-01969-4

Joris G. W. Beemster, Stefan A. Talke, Dirk S. Van Maren, Nathalie Giloy, Anna Wünsche, Wei Zhang, Florent Grasso, Antonius J. F. Hoitink

{"title":"Human footprint on estuarine tidal hydrodynamics","authors":"Joris G. W. Beemster, Stefan A. Talke, Dirk S. Van Maren, Nathalie Giloy, Anna Wünsche, Wei Zhang, Florent Grasso, Antonius J. F. Hoitink","doi":"10.1038/s41561-026-01969-4","DOIUrl":"https://doi.org/10.1038/s41561-026-01969-4","url":null,"abstract":"Natural estuarine morphology exerts strong control over tidal propagation. Human activities, such as dredging and land reclamation, modify the natural geometry, altering tidal dynamics and the ecosystems linked to them. Here we analyse changes in tidal dynamics, specifically the amplitude and propagation of tides, over decadal to centennial timescales, using archival maps, hydrographic surveys, tide gauge records and modern records from 25 estuaries worldwide, spanning the coast to their landward boundaries. Over the past two centuries, local interventions have typically amplified tidal ranges, accelerated tidal propagation and shifted tidal duration asymmetry. The most pronounced changes occurred far inland, often more than 100 km from the coast. Land reclamation and channel deepening are the most widespread and impactful interventions, affecting nearly all systems studied. The magnitude and inland location of maximum changes point to local human activities as the dominant drivers, exceeding the influence of long-term processes such as sea-level rise and natural subsidence and demonstrating that anthropogenic modifications have historically had the larger influence on estuarine water levels. Recognizing this human footprint opens opportunities for targeted local management strategies to reverse past changes, reduce flood risk and build resilience to climate change.","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"3 1","pages":""},"PeriodicalIF":18.3,"publicationDate":"2026-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147751853","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

Atmospheric oxygen constraints on Southern Ocean productivity and drivers of carbon uptake 大气氧对南大洋生产力的限制和碳吸收的驱动因素

IF 18.3 1区地球科学

Nature Geoscience Pub Date : 2026-04-21 DOI: 10.1038/s41561-026-01944-z

Yuming Jin, Britton B. Stephens, Matthew C. Long, Manfredi Manizza, Nicole S. Lovenduski, Cynthia Nevison, Eric J. Morgan, Ralph F. Keeling

{"title":"Atmospheric oxygen constraints on Southern Ocean productivity and drivers of carbon uptake","authors":"Yuming Jin, Britton B. Stephens, Matthew C. Long, Manfredi Manizza, Nicole S. Lovenduski, Cynthia Nevison, Eric J. Morgan, Ralph F. Keeling","doi":"10.1038/s41561-026-01944-z","DOIUrl":"https://doi.org/10.1038/s41561-026-01944-z","url":null,"abstract":"Ocean net primary production fixes dissolved carbon into organic matter while producing O2, driving the biological carbon pump that contributes to ocean CO2 uptake. The Southern Ocean plays a critical role in carbon export, yet its productivity estimates remain highly uncertain due to limited observations. Here we constrain Southern Ocean (south of ~44° S) net primary production by linking Coupled Model Intercomparison Project Phase 6 (CMIP6)-modelled productivity to modelled air–sea O2 fluxes and applying O2 flux estimates derived from airborne O2/N2 observations. We find an annual net primary production of 6.5 ± 1.36 PgC yr−1, substantially higher than most CMIP6 model and satellite-based estimates, but consistent with Argo oxygen-based estimates. We show that CMIP6 models with underestimated productivity exhibit weak summer CO2 uptake, with some also showing excessive summer temperature-driven outgassing. Together, these models produce incorrect seasonal CO2 flux cycles with summer outgassing, whereas observation-based estimates indicate summer uptake. These errors may stem from inadequate model representation of ocean vertical mixing, which affects nutrient supply, stratification and heat redistribution. Our productivity estimates provide quantitative benchmarks that, combined with constraints from airborne CO2 observations and surface ocean pCO2 and temperature observations, reduce uncertainty in estimates of model-projected end-of-century Southern Ocean CO2 uptake by 53%.","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"17 1","pages":""},"PeriodicalIF":18.3,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147734069","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

Chalcopyrite the copper gatekeeper 黄铜矿是铜的守门人

IF 16.1 1区地球科学

Nature Geoscience Pub Date : 2026-04-14 DOI: 10.1038/s41561-026-01949-8

Joël Brugger, Barbara Etschmann

引用次数: 0

Organic pollution found oceanwide 海洋普遍存在有机污染

IF 16.1 1区地球科学

Nature Geoscience Pub Date : 2026-04-14 DOI: 10.1038/s41561-026-01958-7

Aron Stubbins

引用次数: 0

The far reach of fires 大火蔓延的范围

IF 16.1 1区地球科学

Nature Geoscience Pub Date : 2026-04-14 DOI: 10.1038/s41561-026-01967-6

引用次数: 0

Lunar magmatism created magnetism 月球岩浆活动产生了磁力

IF 16.1 1区地球科学

Nature Geoscience Pub Date : 2026-04-14 DOI: 10.1038/s41561-026-01955-w

Sonia M. Tikoo

引用次数: 0

An unprecedented view of ocean currents from geostationary satellites 地球同步卫星对洋流的前所未有的观察

IF 18.3 1区地球科学

Nature Geoscience Pub Date : 2026-04-13 DOI: 10.1038/s41561-026-01943-0

Luc Lenain, Kaushik Srinivasan, Roy Barkan, Nick Pizzo

{"title":"An unprecedented view of ocean currents from geostationary satellites","authors":"Luc Lenain, Kaushik Srinivasan, Roy Barkan, Nick Pizzo","doi":"10.1038/s41561-026-01943-0","DOIUrl":"https://doi.org/10.1038/s41561-026-01943-0","url":null,"abstract":"Oceanic submesoscale currents dominate the vertical exchanges of heat, biological nutrients and carbon between the shallow and the deep ocean and strongly influence the lateral dispersion of biogeochemical tracers and pollutants. Observing these surface intensified currents, however, has been a long-standing challenge due to their small scales and rapid evolution. Here we introduce Geostationary Ocean Flow (GOFLOW), a deep learning framework that takes advantage of geostationary satellites’ contiguous sequences of thermal imagery to produce hourly, high-resolution surface velocity fields that capture submesoscale circulations. Our approach does not assume simplified dynamical balances and inherently filters internal wave noise, both of which limit state-of-the-art satellite altimetry. Applying GOFLOW to the Gulf Stream, we provide satellite-based measurements of submesoscale current statistics, revealing characteristic asymmetries in vorticity and divergence previously documented only in high-resolution circulation models. This ability to routinely map the ocean’s energetic submesoscale currents provides a transformative data source to advance Earth system forecasting, to mitigate ocean pollution, to monitor marine ecosystems and to reduce climate model uncertainties.","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"63 1","pages":""},"PeriodicalIF":18.3,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147685149","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

Increasing river sediment concentration and flux across the pan-Arctic 泛北极地区河流沉积物浓度和通量的增加

IF 18.3 1区地球科学

Nature Geoscience Pub Date : 2026-04-13 DOI: 10.1038/s41561-026-01960-z

Shang Tian, Dongfeng Li, Ting Zhang, James W. McClelland, Irina Overeem, Stuart N. Lane, Robert G. M. Spencer, Ellen Wohl, Anmeng Sha, Yi Zhao, Chiyuan Miao, Munan Ning, Li Yuan, Jinren Ni

{"title":"Increasing river sediment concentration and flux across the pan-Arctic","authors":"Shang Tian, Dongfeng Li, Ting Zhang, James W. McClelland, Irina Overeem, Stuart N. Lane, Robert G. M. Spencer, Ellen Wohl, Anmeng Sha, Yi Zhao, Chiyuan Miao, Munan Ning, Li Yuan, Jinren Ni","doi":"10.1038/s41561-026-01960-z","DOIUrl":"https://doi.org/10.1038/s41561-026-01960-z","url":null,"abstract":"Arctic rivers transport water, sediment and carbon, playing a central role in coastal stability and biogeochemical cycling. Although freshwater discharge to the Arctic Ocean has increased in recent decades, limited observations have hindered system-wide assessment of long-term, reach-level sediment dynamics. Here we develop a pan-Arctic-specific, satellite- and machine learning-based framework to reconstruct four decades of suspended sediment concentration dynamics for 4,331 river reaches. Our analysis reveals a significant increase in suspended sediment concentration in 40% of river reaches (858 out of 2,158) draining continuous permafrost zone, primarily driven by increasing discharge, intensified thermokarst disturbances and fires. The pan-Arctic land–ocean sediment flux averages 315 ± 33 Mt yr−1, with 198 ± 35 Mt yr−1 (63%) from the six major rivers (Yenisey, Lena, Ob’, Kolyma, Yukon and Mackenzie) and 117 ± 13 Mt yr−1 (37%) from 263 previously overlooked small- and medium-sized coastal rivers. The total land–ocean sediment flux has increased by ~15%, from ~299 ± 28 Mt yr−1 in the 1980s to 344 ± 29 Mt yr−1 in the 2010s. These results provide a baseline for pan-Arctic river sediment dynamics and underscore the essential yet underappreciated contribution of small- and medium-sized coastal rivers to Arctic landscape and carbon cycle changes.","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"21 1","pages":""},"PeriodicalIF":18.3,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147685150","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

Water isotope–temperature relationship variability across Antarctica set by atmospheric circulation 大气环流设定的南极洲水同位素-温度关系变率

IF 18.3 1区地球科学

Nature Geoscience Pub Date : 2026-04-13 DOI: 10.1038/s41561-026-01961-y

Mathieu Casado, Adriana Bailey, Christophe Leroy-Dos Santos, Elise Fourré, Vincent Favier, Cécile Agosta, Niels Dutrievoz, Christoph Kittel, Laurent Arnaud, Frédéric Prié, Pete D. Akers, Alexandre Cauquoin, Martin Werner, Leoni Janssen, Barbara Stenni, Giuliano Dreossi, Andrea Spolaor, Agnese Petteni, Joel Savarino, Amaelle Landais

{"title":"Water isotope–temperature relationship variability across Antarctica set by atmospheric circulation","authors":"Mathieu Casado, Adriana Bailey, Christophe Leroy-Dos Santos, Elise Fourré, Vincent Favier, Cécile Agosta, Niels Dutrievoz, Christoph Kittel, Laurent Arnaud, Frédéric Prié, Pete D. Akers, Alexandre Cauquoin, Martin Werner, Leoni Janssen, Barbara Stenni, Giuliano Dreossi, Andrea Spolaor, Agnese Petteni, Joel Savarino, Amaelle Landais","doi":"10.1038/s41561-026-01961-y","DOIUrl":"https://doi.org/10.1038/s41561-026-01961-y","url":null,"abstract":"Water isotopes serve as tracers of hydrological processes and as proxies for past climates archived in ice cores. The isotopic signal is acquired throughout the hydrological cycle—through evaporation over the oceans, precipitation, which occurs as moisture is transported from lower to higher latitudes, and during post-depositional processes in which isotopic exchange between snow and atmospheric moisture occurs. Owing to these multiple influences, the relationship between isotope ratios in ice and local temperature varies across Antarctica, and distinct relationships are found when evaluating isotope ratios and temperature across space (for example, in surface snow) compared with temporal correlations at the same site (for example, in precipitation). Here we report measurements of water vapour isotopic compositions from a traverse across East Antarctica, as well as at two fixed sites: the coastal station Dumont D’Urville and Dome C on the plateau. Combining snow and vapour isotopic data, we demonstrate that the temporal and spatial isotope–temperature relationships are distinct because of differences in how the rainout fraction varies across time and space. Our findings support a shift from thinking about the isotope–temperature relationship in terms of distinct temporal and spatial slopes to recognizing that the relationship varies along a continuum based on known dependencies between circulation dynamics and mean climate state. By distilling moisture along moist isentropic transport paths, we can predict the isotope–temperature relationship across either time or space using a physical understanding of large-scale moisture transport under different climatic conditions.","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"56 1","pages":""},"PeriodicalIF":18.3,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147685153","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

Warming and snow loss increase reliance on old groundwater in a Colorado River headwater 变暖和积雪减少增加了对科罗拉多河源头地下水的依赖

IF 18.3 1区地球科学

Nature Geoscience Pub Date : 2026-04-08 DOI: 10.1038/s41561-026-01945-y

Erica R. Siirila-Woodburn, Nicholas Thiros, Michelle Newcomer, William Rudisill, P. James Dennedy-Frank, Daniel Feldman, Matthias Sprenger, Rosemary. W. H. Carroll, Kenneth H. Williams, Eoin Brodie

{"title":"Warming and snow loss increase reliance on old groundwater in a Colorado River headwater","authors":"Erica R. Siirila-Woodburn, Nicholas Thiros, Michelle Newcomer, William Rudisill, P. James Dennedy-Frank, Daniel Feldman, Matthias Sprenger, Rosemary. W. H. Carroll, Kenneth H. Williams, Eoin Brodie","doi":"10.1038/s41561-026-01945-y","DOIUrl":"https://doi.org/10.1038/s41561-026-01945-y","url":null,"abstract":"Atmospheric warming is reducing snowpack, with uncertain effects on mountainous streamflow, a crucial water resource. Despite limited historical observations of groundwater–streamflow interactions above 2,500 m, new measurements in the Upper Colorado River headwaters indicate declining groundwater storage that is dated decades to millennia old. Here we use integrated hydrologic modelling spanning water years 2015–2021 to determine whether the loss of old-age groundwater buffers streamflow during low-snow years and whether that loss is exacerbated with warming. Results show that old-groundwater contributions to streams remain relatively steady through time, unlike the more variable contributions from young groundwater. Numerical experiments of increased surface air temperatures (+2.5 °C and +4 °C) increase rain–snow fractions and evapotranspiration and decrease runoff ratio by 2–3% per degree Celsius increase. As streamflow declines with warming, the age of groundwater supporting it gets older, in part owing to intermediate-aged (1–3 year) groundwater declining twice as fast. Simulations show that water table depths at higher elevations (>3,700 m) decline disproportionately and fail to recover even during wet years. These findings suggest altered groundwater–streamflow interactions with warming and snow loss, with implications for water resources.","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"307 1","pages":""},"PeriodicalIF":18.3,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147631159","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