Communications Earth & Environment最新文献_第6页

Proposed identification criteria of the Martian lower crust and mantle excavated by the Isidis impact. 提出了火星下地壳和地幔在伊西迪斯撞击下的识别标准。

IF 9.3 1区地球科学

Communications Earth & Environment Pub Date : 2026-01-01 Epub Date: 2026-06-02 DOI: 10.1038/s43247-026-03617-6

Alexander J Trowbridge, Briony Horgan, Benjamin P Weiss, Michael Phillips

{"title":"Proposed identification criteria of the Martian lower crust and mantle excavated by the Isidis impact.","authors":"Alexander J Trowbridge, Briony Horgan, Benjamin P Weiss, Michael Phillips","doi":"10.1038/s43247-026-03617-6","DOIUrl":"10.1038/s43247-026-03617-6","url":null,"abstract":"Isidis Planitia is a > 1500 km diameter Martian impact basin1-4. The impact excavated material and deposited it in the northeast Syrtis region on which the 49-km diameter Jezero crater subsequently formed. The NASA Mars 2020 rover Perseverance is currently near Jezero crater5 collecting samples for eventual return to Earth. Here, we simulate the Isidis impact using the shock physics hydrocode impact-Simplified Arbitrary Lagrangian Eulerian (iSALE) both in two dimensional (2D) and three dimensional (3D) to determine the provenance and shock state of ejecta in this region. We find that the Isidis-forming impact can excavate the Martian upper mantle and deposit it near Jezero. Additionally, the excavated material shocked to 45-60 GPa is predominately sourced from the mantle, which may enable the Perseverance rover to distinguish it from other excavated deposits. Utilizing these hydrocode results, we describe a strategy for a possible future traverse to optimize identification of ejected mantle.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":"7 1","pages":"714"},"PeriodicalIF":9.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13529585/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148879323","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

Lowering the Mo limit for nitrogen fixation by Mo-nitrogenase. 降低Mo固氮酶对Mo的限制。

IF 9.3 1区地球科学

Communications Earth & Environment Pub Date : 2026-01-01 Epub Date: 2026-01-14 DOI: 10.1038/s43247-026-03193-9

Zackry Stevenson, Dylan L Schultz, Michelle Chamberlain, Kathryn Rico, Ariel Anbar, Anne E Dekas, Elizabeth D Swanner

{"title":"Lowering the Mo limit for nitrogen fixation by Mo-nitrogenase.","authors":"Zackry Stevenson, Dylan L Schultz, Michelle Chamberlain, Kathryn Rico, Ariel Anbar, Anne E Dekas, Elizabeth D Swanner","doi":"10.1038/s43247-026-03193-9","DOIUrl":"10.1038/s43247-026-03193-9","url":null,"abstract":"Archean ocean marine primary productivity may have been limited by biologically available nitrogen. Due to low molybdenum abundances, early biological nitrogen fixation is thought to have relied on alternative nitrogenases that incorporate vanadium or iron instead of molybdenum. Here, we examine nitrogen fixation in a Cyanobacteria-dominated, ferruginous, low-sulfate, low-molybdenum lake, which replicates biological and chemical conditions relevant to early marine primary productivity. Nitrogen fixation occurs even when molybdenum is <1 nM, 100x less than the abundance in modern oceans. Molybdenum additions did not increase nitrogen fixation rates, indicating that diazotrophs were not molybdenum limited. Only the molybdenum-iron nitrogenase was detected in metagenomes and metatranscriptomes, indicating that the alternative nitrogenases were not required. We suggest that low sulfate (<1 μM) and/or efficient uptake mitigated molybdenum limitation. These results indicate that molybdenum bioavailability may be strongly controlled by sulfate and that alternative nitrogenases are not essential for nitrogen fixation at low molybdenum.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":"7 1","pages":"169"},"PeriodicalIF":9.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12909111/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146218716","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

Coral tissue depth reconstructed using skeletal microstructural offsets is driven by environmental stress. 利用骨骼微结构偏移重建珊瑚组织深度是由环境应力驱动的。

IF 9.3 1区地球科学

Communications Earth & Environment Pub Date : 2026-01-01 Epub Date: 2026-01-19 DOI: 10.1038/s43247-025-03114-2

James Vincent, Tom Sheldrake

{"title":"Coral tissue depth reconstructed using skeletal microstructural offsets is driven by environmental stress.","authors":"James Vincent, Tom Sheldrake","doi":"10.1038/s43247-025-03114-2","DOIUrl":"10.1038/s43247-025-03114-2","url":null,"abstract":"Coral tissue depth reflects organismal health and is influenced by environmental stressors. Reconstructing its past variability on inter- and intra-annual timescales, however, is not yet possible. Here we reconstructed seasonal tissue depth by measuring spatial offsets between growth cycles in corallite porosity and theca geochemistry (Lithium/Magnesium and Barium/Calcium ratios) of a single Siderastrea siderea core collected in Barbados. We show spatial offsets and thus tissue depth vary systematically over multiyear timescales, with decreasing values associated with thermal stress that impact extension rate and calcification in subsequent growth cycles. Large environmental disturbances such as the 2021 volcanic eruption of La Soufrière (St. Vincent) also impact tissue depth, in this case likely due to the release of bioactive metals upon ash deposition. This study investigates the robustness of the offset signal within a single colony and with further validation across multiple colonies could help reconstruct regional to global environmental and ecological stressors.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":"7 1","pages":"136"},"PeriodicalIF":9.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12880916/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146141340","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

Abrupt Gulf Stream path changes are a precursor to a collapse of the Atlantic Meridional Overturning Circulation. 墨西哥湾流路径的突然改变是大西洋经向翻转环流崩溃的前兆。

IF 9.3 1区地球科学

Communications Earth & Environment Pub Date : 2026-01-01 Epub Date: 2026-02-26 DOI: 10.1038/s43247-026-03309-1

René M van Westen, Henk A Dijkstra

引用次数: 0

A long-lived impact-generated hydrothermal system at the Chicxulub impact structure. 希克苏鲁伯撞击构造中一个长期存在的撞击产生的热液系统。

IF 9.3 1区地球科学

Communications Earth & Environment Pub Date : 2026-01-01 Epub Date: 2026-06-09 DOI: 10.1038/s43247-026-03618-5

Annemarie E Pickersgill, Evangelos Christou, Marissa M Tremblay, Dan N Barfod, Cornelia Rasmussen, Martin R Lee, Martin Schmieder, Gareth S Collins, Ross Dymock, Sean P S Gulick, David A Kring, Joanna V Morgan, Gordon R Osinski, Timothy Swindle, Sonia M Tikoo, Axel Wittmann, Darren F Mark

{"title":"A long-lived impact-generated hydrothermal system at the Chicxulub impact structure.","authors":"Annemarie E Pickersgill, Evangelos Christou, Marissa M Tremblay, Dan N Barfod, Cornelia Rasmussen, Martin R Lee, Martin Schmieder, Gareth S Collins, Ross Dymock, Sean P S Gulick, David A Kring, Joanna V Morgan, Gordon R Osinski, Timothy Swindle, Sonia M Tikoo, Axel Wittmann, Darren F Mark","doi":"10.1038/s43247-026-03618-5","DOIUrl":"10.1038/s43247-026-03618-5","url":null,"abstract":"Hydrothermal systems likely played an essential role in the origin of life, both on Earth and potentially on other planets. They form anywhere that heat and aqueous fluids interact, including within cooling hypervelocity impact craters. Longer periods of hydrothermal activity will generate extended windows of opportunity for prebiotic chemical reactions to occur, life to develop, and micro-organisms to thrive and propagate beyond their point of origin. Here, we present radioisotopic age constraints and numerical simulations for the duration of post-impact hydrothermal activity in and around the peak ring of the ~200 km diameter 66 Ma Chicxulub impact structure. We find that hydrothermal activity persisted for at least 8 million years (Myr), which is approximately four times longer than previously estimated by numerical simulations, palaeomagnetic records, and petrographic interpretations at Chicxulub, making it the longest-lived impact generated hydrothermal system documented on Earth.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":"7 1","pages":"470"},"PeriodicalIF":9.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13249567/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148223494","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

Area based conservation tools have mixed effects across all SDGs but research may overstate effects. 基于区域的保护工具对所有可持续发展目标都有不同的影响，但研究可能夸大了影响。

IF 8.9 1区地球科学

Communications Earth & Environment Pub Date : 2026-01-01 Epub Date: 2026-01-09 DOI: 10.1038/s43247-025-03040-3

Gerald G Singh, Caitie Frenkel, Helen Pheasey, Jacob Bentley, Rachel Seary, Andrés M Cisneros-Montemayor, Ana K Spalding, Ridhee Gupta, Yoshitaka Ota

{"title":"Area based conservation tools have mixed effects across all SDGs but research may overstate effects.","authors":"Gerald G Singh, Caitie Frenkel, Helen Pheasey, Jacob Bentley, Rachel Seary, Andrés M Cisneros-Montemayor, Ana K Spalding, Ridhee Gupta, Yoshitaka Ota","doi":"10.1038/s43247-025-03040-3","DOIUrl":"10.1038/s43247-025-03040-3","url":null,"abstract":"Marine Protected Areas (MPAs) are important tools in marine conservation. However, MPAs have unforeseen consequences, including complex adverse outcomes for human coastal communities through impacts such as dispossession of people to resource access. Here we searched the literature for evidence of MPA effects across the Sustainable Development Goals (SDGs), collected information on these effects and the forms of evidence used to document these effects. Our analysis indicated that MPAs can have both positive and negative effects across each of the 17 SDGs, and that many papers rely on secondary data over primary data to assess those effects. For SDGs 1 (End Poverty), 2 (No Hunger), and 5 (Gender Equality) we found that papers highlighting benefits of MPAs were usually more reliant on secondary information than papers emphasizing adverse impacts. Given the importance of local contexts, MPAs are better used as precision interventions rather than broad policy tools for achieving large-scale marine sustainability.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":"7 1","pages":"34"},"PeriodicalIF":8.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12805877/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145997467","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

Creeping snow drought threatens Canada's water supply. 不断蔓延的雪旱威胁着加拿大的供水。

IF 8.9 1区地球科学

Communications Earth & Environment Pub Date : 2026-01-01 Epub Date: 2026-01-09 DOI: 10.1038/s43247-025-03162-8

Robert Sarpong, Ali Nazemi, Amir AghaKouchak

引用次数: 0

Ubiquitous and expanding glacier algal blooms modelled around the Greenland Ice Sheet. 在格陵兰冰原周围模拟的无处不在和不断扩大的冰川藻华。

IF 9.3 1区地球科学

Communications Earth & Environment Pub Date : 2026-01-01 Epub Date: 2026-06-16 DOI: 10.1038/s43247-026-03758-8

Christopher J Williamson, Andrew J Tedstone

{"title":"Ubiquitous and expanding glacier algal blooms modelled around the Greenland Ice Sheet.","authors":"Christopher J Williamson, Andrew J Tedstone","doi":"10.1038/s43247-026-03758-8","DOIUrl":"10.1038/s43247-026-03758-8","url":null,"abstract":"Glacier algal blooms occupying the melting surface of the Greenland Ice Sheet (GrIS) support diverse microbial communities and amplify ice melt through positive albedo feedback. Knowledge about the distribution and magnitude of these blooms has been limited to isolated field surveys or regional remote sensing and modelling studies to-date. Here, we present Greenland-wide simulations of glacier algal blooms over the past two decades (2000-2022) using a Quasi Monte Carlo (QMC) ensemble approach informed through sensitivity analysis of key model parameters. We show how conditions conducive for glacier algal growth are present around the entirety of the GrIS margins each year of our study regardless of the magnitude and duration of the melt season. Spatiotemporal heterogeneity in accumulated biomass is modelled across the ablation zone, between ice sheet sectors and relative to inter-annual variability in melt. Bloom magnitude maps to the availability of ablation zone area in each year and we identify northern sectors as potential harbingers of expansive blooms that remain to be sampled. A small increasing trend in total bloom extent (3724 km-2 yr-1) between 2000 and 2022 supports the likelihood of future bloom expansion as more of the ice sheet is unlocked by warming.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":"7 1","pages":"613"},"PeriodicalIF":9.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13400310/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148590660","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

Long-term ecological stability in the Pleistocene central Levantine corridor revealed by enamel isotopes from Lebanon. 黎巴嫩珐琅同位素揭示更新世黎凡特中部走廊的长期生态稳定性。

IF 9.3 1区地球科学

Communications Earth & Environment Pub Date : 2026-01-01 Epub Date: 2026-09-14 DOI: 10.1038/s43247-026-03925-x

Gabriele Russo, Faysal Bibi, Chrysa Tsimopoulou, Mathieu Duval, Yamandù H Hilbert, Maya Haïdar-Boustani, Dorothée G Drucker, Sireen El Zaatari

{"title":"Long-term ecological stability in the Pleistocene central Levantine corridor revealed by enamel isotopes from Lebanon.","authors":"Gabriele Russo, Faysal Bibi, Chrysa Tsimopoulou, Mathieu Duval, Yamandù H Hilbert, Maya Haïdar-Boustani, Dorothée G Drucker, Sireen El Zaatari","doi":"10.1038/s43247-026-03925-x","DOIUrl":"10.1038/s43247-026-03925-x","url":null,"abstract":"Throughout the Pleistocene, the Levant served as a key land bridge between continents and witnessed repeated hominin dispersals, including the major expansion of modern humans out of Africa. Yet despite this strategic role, the local ecological conditions encountered by hominin populations along the central Levant remain poorly understood. Here, we analyze sequential and bulk δ13C and δ18O enamel values from eight herbivore species across three Lebanese archaeological sites, Naame, Nahr Ibrahim, and Ras el-Kelb, spanning ~400,000 to ~100,000 years ago, to reconstruct vegetation structure, hydrology, and seasonal temperature regimes experienced by the hominins who lived in this region. Our results show that the central Levant maintained persistently regular Mediterranean seasonality, with consistent summer-winter offsets and minimal chronological change in amplitude across multiple glacial-interglacial cycles, despite pronounced regional and global climatic oscillations. This reliable hydroclimate supported C3-dominated woodlands and mesic, heterogeneous habitats that maintained reliable resources for herbivore communities over nearly 300,000 years. Together, these findings identify the Lebanese coast as a persistent ecological refugium offering resource predictability that likely facilitated repeated hominin occupations and dispersal events through the eastern Mediterranean.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":"7 1","pages":"705"},"PeriodicalIF":9.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13574713/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148975944","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 three-dimensional structure of fine-scale, vertical velocities in the Southern Ocean inferred from space. 从太空中推断出的南大洋精细尺度垂直速度的三维结构。

IF 9.3 1区地球科学

Communications Earth & Environment Pub Date : 2026-01-01 Epub Date: 2026-06-02 DOI: 10.1038/s43247-026-03673-y

Andrew F Thompson, Lilian A Dove, Yann-Treden Tranchant, Benoit Legresy, Beatriz Peña Molino, Laura Herraiz Borreguero, Zichang He, Patrice Klein

{"title":"The three-dimensional structure of fine-scale, vertical velocities in the Southern Ocean inferred from space.","authors":"Andrew F Thompson, Lilian A Dove, Yann-Treden Tranchant, Benoit Legresy, Beatriz Peña Molino, Laura Herraiz Borreguero, Zichang He, Patrice Klein","doi":"10.1038/s43247-026-03673-y","DOIUrl":"10.1038/s43247-026-03673-y","url":null,"abstract":"Upper ocean vertical velocities link surface properties to the ocean interior and are typically intensified at small-scale fronts. The small footprint of these velocities and their intermittent nature presents a challenge for determining vertical transport over large regions and long time periods. Here, we diagnose vertical velocities by exploiting the high resolution sea surface height observations collected by the Surface Water and Ocean Topography altimeter along with interior hydrographic measurements from ocean gliders. A surface-height-based reconstruction of interior density and velocity fields permits an estimate of vertical velocities by applying the quasi-geostrophic omega equation at fine spatial scales. Vertical velocities are deep-reaching, have horizontal scales as small as 10 km, and commonly exceed 150 m day-1 throughout the upper 1000 m. The statistical relationship of vertical velocity with vorticity and strain fields are consistent with high-resolution numerical models. This analysis is a step towards generating temporally-varying vertical tracer fluxes for the circumpolar Southern Ocean.","PeriodicalId":10530,"journal":{"name":"Communications Earth & Environment","volume":"7 1","pages":"712"},"PeriodicalIF":9.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13529589/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148879329","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