Geophysical Research Letters最新文献_第5页

The Major Role of Anthropogenic Emission Underestimation in PM2.5 Estimation Uncertainty Over the Tibetan Plateau 人为排放低估在青藏高原PM2.5估算不确定性中的主要作用

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-04-29 DOI: 10.1029/2024GL110513

Mengyuan Zhang, Shuai Wang, Wenxuan Yu, Chenliang Tao, Shengqiang Zhu, Jinlong Ma, Peng Wang, Hongliang Zhang

{"title":"The Major Role of Anthropogenic Emission Underestimation in PM2.5 Estimation Uncertainty Over the Tibetan Plateau","authors":"Mengyuan Zhang, Shuai Wang, Wenxuan Yu, Chenliang Tao, Shengqiang Zhu, Jinlong Ma, Peng Wang, Hongliang Zhang","doi":"10.1029/2024GL110513","DOIUrl":"https://doi.org/10.1029/2024GL110513","url":null,"abstract":"In recent decades, the Tibetan Plateau (TP) has experienced a notable rise in fine particulate matter (PM2.5) levels, impacting its climate and ecology. However, accurately simulating PM2.5 concentrations on the TP remains challenging. This study investigates the uncertainties in PM2.5 underestimation, including meteorological conditions, dust emissions, regional transport, and emission inventories. Results show that discrepancies in various anthropogenic emission inventories significantly hinder accurate PM2.5 concentration reproduction on the TP, overwhelming meteorological predictions, dust emissions, and regional transport contributions. With meteorological simulations showing similar discrepancies to those in other regions, limited improvement from increased dust, and a relatively high proportion of regional transport, it becomes evident that local emissions are underestimated. Modeling with adjusted anthropogenic emissions reveals a seasonal underestimation of 82.6%–92.6% of local anthropogenic emissions on the TP. This research emphasizes the need for an accurate anthropogenic emission inventory in understanding climate change on the TP.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 9","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL110513","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143883910","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

Enhanced Climate Mitigation Feedbacks by Wetland Vegetation in Semi-Arid Compared to Humid Regions 与湿润地区相比，半干旱地区湿地植被对气候减缓的反馈增强

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-04-29 DOI: 10.1029/2025GL115242

Tingxiang Liu, Lingxue Yu, Zhuoran Yan, Xuan Li, Kun Bu, Jiuchun Yang

{"title":"Enhanced Climate Mitigation Feedbacks by Wetland Vegetation in Semi-Arid Compared to Humid Regions","authors":"Tingxiang Liu, Lingxue Yu, Zhuoran Yan, Xuan Li, Kun Bu, Jiuchun Yang","doi":"10.1029/2025GL115242","DOIUrl":"https://doi.org/10.1029/2025GL115242","url":null,"abstract":"Wetlands are recognized for their climate mitigation potential through carbon storage and local cooling effects. Yet, the spatial variability of how wetland vegetation influences local climates via biogeophysical process remains poorly understood. Here, we examine the impacts of wetland vegetation changes on land surface temperature (LST) across the Amur River Basin using satellite data and model simulations. Our results reveal significant cooling effects associated with increased wetland vegetation, with the strongest cooling observed in semi-arid areas (−1.12°C m2 m−2), compared to semi-humid (−0.46°C m2 m−2) and humid zones (−0.45°C m2 m−2). Decoupling biogeophysical pathways reveals that atmospheric feedback, aerodynamic resistance and surface resistance accounted for 44.4%, 41.5%, and 13.3%, respectively, of the diagnosed LST sensitivities to leaf area index in semi-arid regions, whereas aerodynamic resistance and atmospheric feedback contributed 75.2% and 23.8%, respectively, in humid regions. Our findings suggest wetland vegetation restoration, particularly in semi-arid regions, could provide substantial climate mitigation benefits through biogeophysical process.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 9","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL115242","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143883908","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

On Risk of Rain on Snow Over High-Latitude Coastal Areas in North America 北美高纬度沿海地区雨雪风险分析

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-04-29 DOI: 10.1029/2025GL114775

Azharuddin Mohammed, Ardeshir Ebtehaj, Judah Cohen, Efi Foufoula-Georgiou

引用次数: 0

Expanding Irrigation Intensifies the Humid Heat Stress in China: Evidence From Observations and Modeling 扩大灌溉加剧了中国湿热胁迫：来自观测和模拟的证据

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-04-29 DOI: 10.1029/2024GL114241

Dan Yan, Mengmeng Li, Xinyi Jiang, Yuting Lu, Yiting Zhou, Tijian Wang

{"title":"Expanding Irrigation Intensifies the Humid Heat Stress in China: Evidence From Observations and Modeling","authors":"Dan Yan, Mengmeng Li, Xinyi Jiang, Yuting Lu, Yiting Zhou, Tijian Wang","doi":"10.1029/2024GL114241","DOIUrl":"https://doi.org/10.1029/2024GL114241","url":null,"abstract":"China is the world's second-largest agricultural irrigation country, with profound influences on the escalating heat stress. This study combines historical weather records and 10-year regional climate simulations, in conjunction with optimized irrigation algorithm, to disentangle the dual impacts of irrigation on heat stress in China. Application of province-specific soil moisture thresholds generates improved simulation of irrigation water amount and a lower model error by 30%. The substantial cooling and moistening effects by irrigation are revealed by weather records and optimized irrigation-climate simulations, that is, −0.13°C/decade (−0.01°C to −0.72°C) for daily maximum air temperature and +1.80%/decade (0.02%–3.96%) for relative humidity. Despite alleviating the extreme high-temperature events, agricultural irrigation intensifies the occurrence (0.93 days yr−1) and population exposure (0.46 million person-days yr−1) of humid heat. This study suggests that irrigation may not serve as an optimal land management adaptation strategy to mitigate the growing humid heat under climate change.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 9","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL114241","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143883912","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

Ion Kinetics in Thin Current Sheets at Lunar Distances 月球距离下薄电流片中的离子动力学

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-04-29 DOI: 10.1029/2024GL114522

S. R. Kamaletdinov, A. V. Artemyev, A. Runov, V. Angelopoulos

{"title":"Ion Kinetics in Thin Current Sheets at Lunar Distances","authors":"S. R. Kamaletdinov, A. V. Artemyev, A. Runov, V. Angelopoulos","doi":"10.1029/2024GL114522","DOIUrl":"https://doi.org/10.1029/2024GL114522","url":null,"abstract":"The magnetotail current sheet plays a crucial role in substorm dynamics, affecting the entire magnetosphere. Formation and reconnection of thin (ion-gyroscale) current sheets initiate magnetospheric substorms. Theoretical models suggest that a transient, demagnetized ion population is key element of the thin current sheet configuration. At lunar distances, the magnetotail provides a unique opportunity for in situ investigation of this population due to the high fraction of hot demagnetized ions. Using observations of thin current sheets by the Acceleration, Reconnection, Turbulence and Electrodynamics of the Moon's Interaction with the Sun mission, we show that the relative drift between demagnetized hot ions and magnetized cold ions, likely driven by a strong polarization electric field, reduces the ion current density to nearly zero in the spacecraft rest frame. Hot ions exhibit a crescent-like velocity distribution, contributing to ion agyrotropy. We discuss this population in the context of advanced thin current sheet models, including transient ions performing Speiser-like motion. These observations provide valuable insights for numerical and theoretical studies.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 9","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL114522","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143883914","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 Double Dip: How Tropospheric Expansion Counteracts Increases in Extratropical Stratospheric Ozone Under Global Warming 双底：全球变暖下对流层膨胀如何抵消温带平流层臭氧的增加

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-04-29 DOI: 10.1029/2024GL112409

Aaron Match, Edwin P. Gerber

{"title":"The Double Dip: How Tropospheric Expansion Counteracts Increases in Extratropical Stratospheric Ozone Under Global Warming","authors":"Aaron Match, Edwin P. Gerber","doi":"10.1029/2024GL112409","DOIUrl":"https://doi.org/10.1029/2024GL112409","url":null,"abstract":"In response to rising <math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mtext>CO</mtext>\u0000 <mn>2</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation> ${text{CO}}_{2}$</annotation>\u0000 </semantics></math>, chemistry-climate models (CCMs) project that extratropical stratospheric ozone will increase, except around 10 and 17 km. We call the muted increases or reductions at these altitudes the “double dip.” The double dip results from surface warming (not stratospheric cooling). Using an idealized photochemical-transport model, surface warming is found to produce the double dip via tropospheric expansion, which converts ozone-rich stratospheric air into ozone-poor tropospheric air. The lower dip results from expansion of the extratropical troposphere, as previously understood. The upper dip results from expansion of the tropical troposphere, low-ozone anomalies from which are then transported into the extratropics. Large seasonality in the double dip in CCMs can be explained, at least in part, by seasonality in the stratospheric overturning circulation. The remote effects of the tropical tropopause on extratropical ozone complicate the use of (local) tropopause-following coordinates to remove the effects of global warming.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 9","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL112409","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143883915","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

Joint Effects of Coastal and Inland Mountains on East Asian Climate During the Late Cretaceous 沿海和内陆山脉对晚白垩世东亚气候的共同影响

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-04-29 DOI: 10.1029/2024GL114228

Chenmin Yu, Daniel J. Lunt, Xin Ren, Laiming Zhang, Chengshan Wang

{"title":"Joint Effects of Coastal and Inland Mountains on East Asian Climate During the Late Cretaceous","authors":"Chenmin Yu, Daniel J. Lunt, Xin Ren, Laiming Zhang, Chengshan Wang","doi":"10.1029/2024GL114228","DOIUrl":"https://doi.org/10.1029/2024GL114228","url":null,"abstract":"Understanding the climatic impacts of complex mountain configurations is a key challenge, particularly in East Asia during the Late Cretaceous, where diverse mountain landscapes existed but their interactions remain under-explored. Using the HadCM3L climate model, we simulate climate for various mountain configurations and validate results with two model-proxy comparison methods based on proxies and paleo-Köppen classification. Our findings, aligned with geological evidence, suggest the possible presence of the Coastal, Taihang, and Yanshan Mountains during the Late Cretaceous. Surface radiation energy calculations reveal that mountains influenced temperature through cloud processes and caused localized warming due to vegetation changes. Moisture budget calculations show that mountains controlled inland aridity through atmospheric circulation, and contributed to drought near the mountains through transient eddy activity. Coastal mountains dominated climate shifts related to the East Asian monsoon, with the Taihang and Yanshan Mountains amplifying these effects. These insights enhance understanding of paleo-topography and climate dynamics.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 9","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL114228","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143883913","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

Mechanisms Driving the Extensive Antarctic Bottom Water in the Glacial Atlantic 在冰川大西洋中驱动南极广阔底水的机制

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-04-28 DOI: 10.1029/2025GL114809

Yugeng Chen, Pengyang Song, Xianyao Chen, Gerrit Lohmann

引用次数: 0

A Novel Model for Forecasting Geomagnetic Indices Using Machine Learning 利用机器学习预测地磁指数的新模型

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-04-28 DOI: 10.1029/2025GL114848

Guram Kervalishvili, Ingo Michaelis, Monika Korte, Jan Rauberg, Jürgen Matzka

引用次数: 0

Extreme Hydroclimate Events Between Early-1100s and Mid-1200s Recorded in Deep Springs Lake, California 加州深泉湖记录的1100年代早期至1200年代中期的极端水文气候事件

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-04-28 DOI: 10.1029/2024GL114377

Jianru Cheng, Huifang Xu

{"title":"Extreme Hydroclimate Events Between Early-1100s and Mid-1200s Recorded in Deep Springs Lake, California","authors":"Jianru Cheng, Huifang Xu","doi":"10.1029/2024GL114377","DOIUrl":"https://doi.org/10.1029/2024GL114377","url":null,"abstract":"Previous studies reported megadroughts in southwestern North America during the Medieval Climate Anomaly and subsequent periods. However, previous local records challenge traditional tree-ring based indices. Through mineralogical analyses of Deep Springs Lake sediments in California, we examined carbonate mineral assemblages as novel hydroclimate proxies. Our investigation revealed a primary magnesite-rich layer (∼70% Ca-bearing magnesite, ∼30% dolomite) beneath a layer dominated by aragonite and calcite, implying a transition from an extreme drought to pluvial conditions. Since magnesite precipitates only at the highest Mg:Ca ratios, followed by dolomite and calcite/aragonite, we developed the quantitative Carbonate Dryness Index (CDI) by weighting these minerals. The CDI curve highlights a drought and a following pluvial with unparalleled magnitudes in the past millennium during 1090–1150 CE, aligning with nearby local climate proxies but not regional tree-ring records. Additionally, DSL sediments recorded ∼500-year wet/dry cycles driven by solar and El Niño-Southern Oscillation (ENSO) activities.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 8","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL114377","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879973","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