地球科学最新文献_第5页

Amphibole Compositions Record Cold Post-Emplacement Reequilibration in Plutons

IF 3.9 2区地球科学

Journal of Geophysical Research: Solid Earth Pub Date : 2025-03-14 DOI: 10.1029/2024JB030122

Ke Gao, C. Brenhin Keller, Changqian Ma

引用次数: 0

Impacts of Pandemic-Associated Plastic Waste on Microplastics in Ambient PM2.5

IF 3.8 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-03-13 DOI: 10.1029/2024JD043035

Fobang Liu, Mengting Guo, Yanan Wang, Shuqi Yang, Xu Yang, Kai Wang, Junxian Hou, Guibin Wang, Chi He, Pengfei Wu

{"title":"Impacts of Pandemic-Associated Plastic Waste on Microplastics in Ambient PM2.5","authors":"Fobang Liu, Mengting Guo, Yanan Wang, Shuqi Yang, Xu Yang, Kai Wang, Junxian Hou, Guibin Wang, Chi He, Pengfei Wu","doi":"10.1029/2024JD043035","DOIUrl":"https://doi.org/10.1029/2024JD043035","url":null,"abstract":"<p>Microplastics (MPs) are a rising environmental and health concern, and the COVID-19 pandemic has increased plastic waste, particularly single-use plastics. While the impacts of pandemic-associated plastic waste on multiple environmental matrices (e.g., water and soil) have been well documented, its effects on MPs in atmospheric fine particles (PM<sub>2.5</sub>) remain unclear. In this study, we analyzed the MPs in ambient PM<sub>2.5</sub> collected from urban Xi'an before, during, and after the COVID-19 pandemic in both summer and winter. Mean MP concentrations during and after the pandemic were three times higher than prepandemic levels, irrespective of the season. Transparent and white polypropylene and polyethylene terephthalate fibers dominated during and after the pandemic, while prepandemic MPs were more diverse in polymer types and colors. These results indicate a strong impact of pandemic-associated waste, especially discarded face masks, on the abundance and characteristics of MPs in ambient PM<sub>2.5</sub>. Additionally, a positive correlation was found between MPs and ambient ozone, suggesting the potential for ozone to degrade plastics and release MPs into the air. Multiple-path particle dosimetry calculations revealed that MPs primarily deposit in the extrathoracic region of people across all age groups. However, teenagers and younger individuals showed increased susceptibility to deposition in tracheobronchial and pulmonary regions. Based on the estimated daily dose, inhalation of MPs from ambient PM<sub>2.5</sub> is proposed to be a significant exposure pathway for humans. Overall, our study highlights the substantial impacts of pandemic-associated plastic waste on MPs in ambient PM<sub>2.5</sub> and their potential implications for human exposure.</p>","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 6","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Interplanetary Magnetic Field By Controlled Alfvén Wings at Earth During an Encounter of a Coronal Mass Ejection

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-03-13 DOI: 10.1029/2024GL113416

Yuxi Chen, Chuanfei Dong, Li-Jen Chen, Menelaos Sarantos, Brandon L. Burkholder

{"title":"Interplanetary Magnetic Field By Controlled Alfvén Wings at Earth During an Encounter of a Coronal Mass Ejection","authors":"Yuxi Chen, Chuanfei Dong, Li-Jen Chen, Menelaos Sarantos, Brandon L. Burkholder","doi":"10.1029/2024GL113416","DOIUrl":"https://doi.org/10.1029/2024GL113416","url":null,"abstract":"<p>On 24 April 2023, an ICME reached Earth's orbit. The solar wind density dropped to 0.3 amu/cc while the IMF strength was about 25 nT. As a result, the solar wind flow transitions to a sub-Alfvénic state with an Alfvén Mach number of 0.4. We carry out global magnetohydrodynamic simulations to investigate the responses of Earth's magnetosphere to the ICME ejecta. The results show the formation of Alfvén wings as the solar wind becomes sub-Alfvénic. Furthermore, the sub-Alfvénic period was characterized by the dominance of the IMF <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>B</mi>\u0000 <mi>y</mi>\u0000 </msub>\u0000 </mrow>\u0000 <annotation> ${B}_{y}$</annotation>\u0000 </semantics></math> component, causing the Alfvén wings to extend toward the dawn and dusk flanks. We investigate the global magnetospheric convection of this sub- Alfvénic case and find that the overall convection is mediated by the Alfvén wings, while the magnetic field convection in inner magnetosphere is similar to the super-Alfvénic case.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 6","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL113416","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602733","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

Daily Sun‐induced chlorophyll fluorescence vs. irradiance curves reflect the photoadaptation of phytoplankton in surface waters

IF 4.5 1区地球科学

Limnology and Oceanography Pub Date : 2025-03-13 DOI: 10.1002/lno.70001

Yannick Huot, David Antoine, Vincenzo Vellucci

{"title":"Daily Sun‐induced chlorophyll fluorescence vs. irradiance curves reflect the photoadaptation of phytoplankton in surface waters","authors":"Yannick Huot, David Antoine, Vincenzo Vellucci","doi":"10.1002/lno.70001","DOIUrl":"https://doi.org/10.1002/lno.70001","url":null,"abstract":"Phytoplankton chlorophyll Sun‐induced fluorescence is observable in the upwelling light field of the ocean. This allows its observation by radiometers in situ or on satellite sensors. Since it is influenced by both biomass and physiology it can potentially provide information about both. Since fluorescence yield is complementary to photosynthesis and heat in photosystem II, its observation throughout the day provides information on the response of phytoplankton to diel light cycles. Here we use a time series collected in the northwestern Mediterranean Sea (BOUSSOLE site) to extract photophysiological parameters of phytoplankton using the Sun‐induced fluorescence and as well as with an active chlorophyll fluorometer. The daily resolved patterns are consistent with photoacclimation and photoadaptation processes and reflect seasonal variations of the mixed‐layer average irradiance. We also show that fluorescence yields derived from satellite measurements (MODIS) at the same location are not correlated to these patterns, confirming the limited influence of photoacclimation and photoadaptation on the satellite‐derived chlorophyll fluorescence yield near solar noon.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"86 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618453","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

Salt production, trade and consumption in European pre-industrial societies: Analytical methods and socioeconomic contexts

IF 3.2 1区地球科学

Quaternary Science Reviews Pub Date : 2025-03-13 DOI: 10.1016/j.quascirev.2025.109291

L. Alessandri , F. Bulian , P.A.J. Attema , J. Sevink

引用次数: 0

Medieval forest land use along the Tyrrhenian coast (Tuscany, central Italy): The archaeo-anthracological signal (AD 750–1250)

IF 1.9 3区地球科学

Quaternary International Pub Date : 2025-03-13 DOI: 10.1016/j.quaint.2025.109704

Mauro Paolo Buonincontri , Marta Rossi , Gaetano Di Pasquale

{"title":"Medieval forest land use along the Tyrrhenian coast (Tuscany, central Italy): The archaeo-anthracological signal (AD 750–1250)","authors":"Mauro Paolo Buonincontri , Marta Rossi , Gaetano Di Pasquale","doi":"10.1016/j.quaint.2025.109704","DOIUrl":"10.1016/j.quaint.2025.109704","url":null,"abstract":"<div><div>Charcoal analysis, applied in archaeological excavation of Vetricella site in the distal reach of the Pecora river (Tyrrhenian southern Tuscany, Italy), detected the exploitation, management, and ecology of forest land cover between mid-8th century AD and mid-13th century AD. Taking place in a central Mediterranean district adequately studied through palaeoenvironmental and archaeological research, the investigation determined times and modalities of Medieval human impact on forest ecosystem. The fuelwood supply areas were characterised by <em>Quercus cerris</em> forest, in the past much larger and extended than Mediterranean evergreen forest. The collection of fuelwood was based on the traditional method of coppice woodland management, including the release of decade-year-old standard trees for the production of larger timber assortment, useful for building activities (testified by the numerous post-holes). The silvicultural system, known as compound coppice, produced a forest landscape characterised by multi-storied stands ensuring production of fruit and spreading of acorns for feeding pigs. Changes in the forest ecosystem were particularly detectable from mid-10th century AD, when accessory pioneer woody species, resilient to cut clearance, spread. It was the Ottonian period of activities in sequence aimed at radically changing the site of Vetricella along with land use in the Pecora river valley. The resulting forest land cover management, depending on the political strategies adopted by Medieval authorities, marked the progression of a cultural landscape still characterizing central Tyrrhenian Italy.</div></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"723 ","pages":"Article 109704"},"PeriodicalIF":1.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Eccentricity and obliquity forcing of East Asian hydroclimate during the latest Cretaceous to early Paleocene

IF 4.8 1区地球科学

Earth and Planetary Science Letters Pub Date : 2025-03-13 DOI: 10.1016/j.epsl.2025.119306

Xiaoyue Zhang , David B. Kemp , Ruiyao Zhang , Robert A. Spicer , Simin Jin , Rui Zhang , Ze Zhang , Chunju Huang

{"title":"Eccentricity and obliquity forcing of East Asian hydroclimate during the latest Cretaceous to early Paleocene","authors":"Xiaoyue Zhang , David B. Kemp , Ruiyao Zhang , Robert A. Spicer , Simin Jin , Rui Zhang , Ze Zhang , Chunju Huang","doi":"10.1016/j.epsl.2025.119306","DOIUrl":"10.1016/j.epsl.2025.119306","url":null,"abstract":"<div><div>The latest Cretaceous to early Paleocene was characterized by a global ‘greenhouse’ climate, and may provide a useful analogue for understanding hydroclimate responses to elevated atmospheric CO<sub>2</sub> and temperature. However, a paucity of high-resolution and temporally well-constrained continental sedimentary records spanning this time interval hinders our understanding. We address this issue via a high-resolution paleoenvironmental analysis of a ∼1305 m thick terrestrial succession from the Asian interior (Gonjo Basin, Southeast Tibet). Cyclostratigraphic analysis of element abundance data, combined with a published magnetostratigraphy, allows us to establish an astronomical timescale spanning the latest Cretaceous to early Paleocene (∼69.4 Ma to ∼58.5 Ma) and investigate climatic variations at an orbital time-scale. We show that the paleoenvironment of the Gonjo Basin underwent two key transitions, with a shift from braided river conditions to floodplain-dominated conditions at ∼68.8 Ma, followed by a return to braided river conditions with likely high seasonality at ∼63.5 Ma. Eccentricity and obliquity forcing exerted a strong control on the regional hydrological cycle. We show that the relative strength of obliquity was likely amplified compared to coeval marine records. Obliquity may have modulated meridional heat and moisture transport into the Asian interior, which, combined with feedbacks from quasi-stable carbon reservoirs, mediated hydroclimate. This study improves our understanding of continental paleoclimate evolution in the latest Cretaceous to early Paleocene, and establishes the role and mechanisms of orbital forcing as a driver of hydrological cycle change in East Asia at this time.</div></div>","PeriodicalId":11481,"journal":{"name":"Earth and Planetary Science Letters","volume":"658 ","pages":"Article 119306"},"PeriodicalIF":4.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611103","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

Hydrologic Mechanisms for 2022 Yellowstone River Flood and Comparisons to Recent Historic Floods

IF 3.2 3区地球科学

Hydrological Processes Pub Date : 2025-03-13 DOI: 10.1002/hyp.70099

Jeremy Giovando, Wyatt Reis, Wei Zhang, Nancy A. Barth

{"title":"Hydrologic Mechanisms for 2022 Yellowstone River Flood and Comparisons to Recent Historic Floods","authors":"Jeremy Giovando, Wyatt Reis, Wei Zhang, Nancy A. Barth","doi":"10.1002/hyp.70099","DOIUrl":"https://doi.org/10.1002/hyp.70099","url":null,"abstract":"<div>\u0000 \u0000 <p>In June 2022, a historic flood event occurred in the headwaters of the Yellowstone River Basin. The flood resulted in millions of dollars in damages and substantial interruptions to Yellowstone National Park. The 2022 flood event was substantially higher in magnitude than other high-peak flow events over the last 30 years. The high discharge was primarily due to the combination of hydrologic mechanisms initiated by rain-on-snow, including a high-elevation snowpack that peaked later than average. However, the contributions of each hydrologic driver, rain and snow, have not been quantified and could be important for understanding future flood events in the region. The contribution of snowmelt to the total terrestrial water input (TWI) varied throughout the area, yet was concentrated in the headwaters of the Yellowstone, Stillwater, and Boulder rivers, along with the headwaters of Rock Creek in Wyoming and Montana. The primary atmospheric contributions to the TWI during the 2022 event were precipitation from moisture transported from the Pacific Ocean that converged over the Greater Yellowstone Area (GYA) and snowmelt from residual snowpack in the northeast part of Yellowstone National Park.</p>\u0000 </div>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 3","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Impacts of Strengthened Antarctic Circumpolar Current on the Seasonality of Arctic Climate

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-03-13 DOI: 10.1029/2025GL115211

Peixi Wang, Yuhui Han, Xiaoming Hu, Zhenning Li, Xichen Li, Yingfei Fang, Jun Ying, Song Yang

{"title":"Impacts of Strengthened Antarctic Circumpolar Current on the Seasonality of Arctic Climate","authors":"Peixi Wang, Yuhui Han, Xiaoming Hu, Zhenning Li, Xichen Li, Yingfei Fang, Jun Ying, Song Yang","doi":"10.1029/2025GL115211","DOIUrl":"https://doi.org/10.1029/2025GL115211","url":null,"abstract":"<p>To understand the role of the Antarctic Circumpolar Current (ACC) in the polar seasonality and its remote effect on the Arctic climate, we use the Community Earth System Model to perform Drake Passage (DP) open and closed experiments. Model results illustrate that in the opened DP, the ACC and Atlantic Meridional Overturning Circulation (AMOC) strengthen, leading to a colder Antarctic and a warmer Arctic. Notably, the temperature changes in both the Antarctic and the Arctic show significant seasonal differences, with the largest polar response during the cold seasons. Around the Antarctic, both the ACC and overturning circulation exhibit stronger acceleration in winter than in summer, causing more pronounced cooling in winter. Furthermore, negative seasonal energy transfer mechanism amplifies this cooling. In contrast, around the Arctic, the AMOC and ocean heat transport show relatively insignificant seasonal variation. Instead, it is the downward latent and sensible fluxes that induce amplified winter warming.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 6","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL115211","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602734","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

Benchmark Framework for Global River Models

IF 4.4 2区地球科学

Journal of Advances in Modeling Earth Systems Pub Date : 2025-03-13 DOI: 10.1029/2024MS004379

Xudong Zhou, Dai Yamazaki, Menaka Revel, Gang Zhao, Prakat Modi

{"title":"Benchmark Framework for Global River Models","authors":"Xudong Zhou, Dai Yamazaki, Menaka Revel, Gang Zhao, Prakat Modi","doi":"10.1029/2024MS004379","DOIUrl":"https://doi.org/10.1029/2024MS004379","url":null,"abstract":"<p>Global River Models (GRMs), which simulate river flow and flood processes, have rapidly developed in recent decades. However, these advancements necessitate meaningful and standardized quality assessments and comparisons against a suitable set of observational variables using appropriate metrics, a requirement currently lacking within GRM communities. This study proposes implementing a benchmark system designed to facilitate the assessment of river models and enable comparisons against established benchmarks. The benchmark system incorporates satellite remote sensing data complementing in situ data, including water surface elevation and inundation extent information, with necessary preprocessing. Consequently, this evaluation system encompasses a larger geographical area than traditional methods relying solely on in-situ river discharge measurements for GRMs. A set of evaluation and comparison metrics has been developed, including a quantile-based comparison metric that allows for a comprehensive analysis of multiple simulation outputs. The test application of this benchmark system to a global river model (CaMa-Flood), utilizing diverse runoff inputs, illustrates that incorporating bias-corrected runoff data leads to improved model performance across various observational variables and performance metrics. The current iteration of the benchmark system is suitable for global-scale assessments and can effectively evaluate the impact of model development and facilitate intercomparisons among different models. The source codes are accessible from https://doi.org/10.5281/zenodo.10903210.</p>","PeriodicalId":14881,"journal":{"name":"Journal of Advances in Modeling Earth Systems","volume":"17 3","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024MS004379","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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