地球科学最新文献

{"title":"Identifying Landslides in Atla Regio on Venus","authors":"E. L. Jesina,&nbsp;L. M. Carter,&nbsp;I. Ganesh","doi":"10.1029/2024JE008453","DOIUrl":"https://doi.org/10.1029/2024JE008453","url":null,"abstract":"<p>We performed a systematic search for landslides in the Alta Regio region of Venus, located from (16°S, 179°W) to (21°N, 147°W). Using data primarily from Magellan Cycle 1 radar imagery, we identified 29 landslides in this region. There were 19 previously identified across the entire surface (Malin, 1992, https://doi.org/10.1029/92je01343). There were three different categories and two sub-categories used for morphological classification: rock/debris avalanches, with their subcategory of debris flows; rock slumps/slides; and rock slide avalanches, with their subcategory being small rock slides. These landslides are commonly a result of slope failure of the walls of the chasmata in the Atla Regio. We also compared the types of landslides with altitude to determine whether some types of landslides are more common at different atmospheric pressures; however, no clear correlation could be identified. The prevalence of landslides in this area, including many others that could not be conclusively confirmed at Magellan resolutions, suggests that there are many more landslides on Venus than were previously known.</p>","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":"130 4","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JE008453","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809520","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}

{"title":"A novel XGBoost-based approach for reconstruction terrestrial water storage variations with GNSS in the Northeastern Tibetan Plateau","authors":"Tengxu Zhang ,&nbsp;Zhuohao Wang ,&nbsp;Liangke Huang ,&nbsp;Lin He ,&nbsp;Chaolong Yao","doi":"10.1016/j.jhydrol.2025.133255","DOIUrl":"10.1016/j.jhydrol.2025.133255","url":null,"abstract":"<div><div>Accurately estimating terrestrial water storage (TWS) variations is essential for ensuring the sustainable management of global water resources. The Global Navigation Satellite System (GNSS) offers a promising approach for monitoring TWS changes with high spatial and temporal resolution. However, its application is significantly constrained by the sparse and uneven distribution of GNSS stations. In this study, we build upon traditional GNSS inversion techniques by employing the Extreme Gradient Boosting Machine Learning (XGBML) model to simulate crustal deformation caused by hydrological loading. The simulation is conducted on a <span><math><mrow><mn>0</mn><mo>.</mo><msup><mn>5</mn><mo>°</mo></msup><mo>×</mo><mn>0</mn><mo>.</mo><msup><mn>5</mn><mo>°</mo></msup></mrow></math></span> grid across the Northeastern Tibetan Plateau (NETP). This study compared TWS variations derived from the XGBML simulations and traditional inversion methods with data from the Gravity Recovery and Climate Experiment (GRACE) satellite and the Global Land Data Assimilation System (GLDAS). The Pearson Correlation Coefficients (PCC) between TWS changes derived from the XGBML inversion technique and those from GRACE and GLDAS data were 0.72 and 0.50, respectively, representing improvements of 8.82 % and 11.10 % compared to the conventional inversion approach. Furthermore, GNSS-DSI, GRACE-DSI, and SPEI were integrated to analyze hydrological drought events in the study area, revealing that precipitation and temperature are important drivers of hydrological drought in the NETP. These findings highlight the effectiveness of the XGBML model in simulating GNSS vertical displacements induced by hydrological loading and demonstrate its potential as a novel tool for identifying water storage variations in regions with uneven GNSS station distribution.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"659 ","pages":"Article 133255"},"PeriodicalIF":5.9,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143807981","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}

{"title":"Risk spatial distribution and economic loss assessment for parallel reservoir group dam-break floods: A case study of southwest river basin in China","authors":"Jinjun Zhou ,&nbsp;Chunxin Sun ,&nbsp;Jiahong Liu ,&nbsp;Ruirui Sun ,&nbsp;Songyun Jin ,&nbsp;Chenrui Qin ,&nbsp;Hao Wang","doi":"10.1016/j.ejrh.2025.102364","DOIUrl":"10.1016/j.ejrh.2025.102364","url":null,"abstract":"<div><h3>Study region</h3><div>Zhaotong City, located in the Jinsha River Watershed in southwest China, features a developed river network, mountainous terrain, and significant elevation changes. The region experiences a low-latitude plateau monsoon climate, with rainfall concentrated in the wet season.</div></div><div><h3>Study focus</h3><div>This study uses a 2D hydrodynamic model and a dam-break flood model to assess flood risks of parallel reservoirs and quantify direct economic losses under different scenarios. It also explores the causes of risk and loss variations across scenarios.</div></div><div><h3>New hydrological insights for the region</h3><div>Differences in dam site locations and downstream topography result in significant variations in inundation areas, with extreme cases differing by nearly twofold. Dam-break flood losses depend on inundation extent, water depth, and land value. Variations in high-value land inundation, such as residential, commercial, and industrial areas, are the main reason for differences in direct economic losses. The fatality area of a dam-break flood from parallel reservoirs is smaller than the sum of individual reservoirs due to river confluence effects, delaying the flood's arrival at the city center. Overall, parallel reservoir dam-break risks are influenced by multiple factors, requiring case-specific analysis rather than simple risk summation.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"59 ","pages":"Article 102364"},"PeriodicalIF":4.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808784","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}

{"title":"Enhanced vegetation productivity driven primarily by rate not duration of carbon uptake","authors":"Zunchi Liu, Philippe Ciais, Josep Peñuelas, Jianyang Xia, Sha Zhou, Yao Zhang, Yongshuo H. Fu","doi":"10.1038/s41558-025-02311-3","DOIUrl":"https://doi.org/10.1038/s41558-025-02311-3","url":null,"abstract":"<p>Climate change is altering both the duration and the rate of carbon uptake in plants, thereby affecting terrestrial gross primary productivity (GPP). However, little is known about the relative strengths of these processes or underlying mechanisms. Here, using satellite and carbon-flux data, we show that the duration and mean daily rate of carbon uptake (GPP_rate) have both increased in recent decades, enhancing total GPP with a rate of ~0.56% per year during the growing season across the Northern Hemisphere. Notably, the mean daily GPP_rate, driven primarily by rising CO₂ concentrations and temperatures, contributed ~65% to the changes in total GPP during the growing season over time, with higher contributions in early season (~83%) compared with late season (~55%). These findings highlight the importance of vegetation physiology in driving temporal changes in terrestrial GPP and suggest that the asymmetric changes in productivity across seasons will exacerbate under ongoing climate change.</p>","PeriodicalId":18974,"journal":{"name":"Nature Climate Change","volume":"377 1","pages":""},"PeriodicalIF":30.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143813669","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}

{"title":"Millennial Cycles in Greenland and Antarctic Ice Core Records: Evidence of Astronomical Influence on Global Climate","authors":"Vadim A. Kravchinsky,&nbsp;Rui Zhang,&nbsp;Ryan Borowiecki,&nbsp;Avto Goguitchaichvili,&nbsp;Jan Czarnecki,&nbsp;Andrzej Czarnecki,&nbsp;Niklas Boers,&nbsp;André Berger,&nbsp;Mirko van der Baan","doi":"10.1029/2024JD042810","DOIUrl":"https://doi.org/10.1029/2024JD042810","url":null,"abstract":"<p>Multimillennial-scale climate events are well-documented in ice-core records from both Greenland and Antarctica, yet the role of orbital and solar input oscillations in shaping these events remains unresolved. In this study, we analyze two high-resolution oxygen isotope records from Greenland and Antarctica to assess the influence of orbital cycles on global climate variability. Using two techniques, synchrosqueezing transform (SST) and Bayesian statistical analysis (BSA), we identify prominent climatic periodicities at ∼11, ∼5.5, and ∼2.75 kyr. The duration and amplitude of these oscillations correspond to bi-hemispherical (BHI) and equatorial insolation (EI) cycles and their harmonic emphasizing their role in shaping climate transitions during glacial and interglacial periods. We suggest that the shorter ∼2.75 kyr cycle may match the Hallstatt cycle, which is currently interpreted as a hypothetical solar cycle but could appear to be an EI harmonic. Further comparison with high-resolution BHI and EI records from other geographic zones confirms the presence of these cycles across multiple regions. The use of both SST and BSA techniques increases the robustness of our analysis by ensuring that potential signal artifacts are minimized and that weaker ∼5.5 and ∼2.75 kyr cycles are accurately detected. This study provides new insights into the drivers of major climate variability over the past 150,000 years, demonstrating the significant influence of BHI and EI cycles on Earth's climate system in the past and offering new perspectives on how these orbital cycles may continue to impact Earth's climate in the future.</p>","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 7","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JD042810","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809518","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}

{"title":"Validation of Aerosol Optical Depth Retrieved From CALIPSO Lidar Ocean Surface Backscatter","authors":"Tyler J. Thorsen,&nbsp;Robert A. Ryan,&nbsp;Mark A. Vaughan","doi":"10.1029/2024JD042416","DOIUrl":"https://doi.org/10.1029/2024JD042416","url":null,"abstract":"<p>Aerosol optical depth (AOD) from the new Ocean Derived Column Optical Depth (ODCOD) data product derived from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) onboard the Cloud-Aerosol Lidar Infrared Pathfinder Satellite Observations (CALIPSO) spacecraft is validated using the ground-based Aerosol Robotic Network (AERONET). Relative to AERONET, ODCOD is shown to provide an unbiased AOD and a root mean squared error (RMSE) of 60%. This is in contrast to the performance of the “standard” CALIPSO AOD retrievals (which first detect/identify aerosol layers, retrieve their extinction profile, and then integrate to obtain AOD) that show a larger RMSE (93%) and a significant negative bias (−20%). ODCOD is also shown to provide a higher-fidelity uncertainty estimate than the standard retrievals with the estimated uncertainties providing a good prediction of the true errors as diagnosed with AERONET. A perturbation analysis is performed to assess ODCOD as a retrieval constraint to improve the profiling capability of CALIOP. This analysis indicates that ODCOD has the potential to improve up to 40% of CALIOP retrievals globally.</p>","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 7","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JD042416","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809519","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}

{"title":"Evolution of global vegetation patterns since the last glacial maximum","authors":"Junyan Geng ,&nbsp;Haibin Wu ,&nbsp;Wenchao Zhang ,&nbsp;Qin Li ,&nbsp;Yanyan Yu","doi":"10.1016/j.quaint.2025.109780","DOIUrl":"10.1016/j.quaint.2025.109780","url":null,"abstract":"<div><div>Vegetation evolution is a crucial component of global change research, providing a foundation for understanding the interactions between vegetation dynamics and climate changes. However, current vegetation reconstructions since the Last Glacial Maximum (LGM) have not yet provided a complete and continuous presentation of global-scale vegetation evolution. In this study, we systematically compiled 3286 pollen records and applied the biomization method to reconstruct global vegetation patterns on a millennium resolution since the LGM. Our results show that during the LGM, the mid- and high-latitudes of the Northern Hemisphere were primarily covered by tundra, with steppe and open coniferous forests in western North America, taiga in eastern North America, and steppe dominating much of Eurasia. In the low latitudes, tropical rainforests retreated significantly compared to the present, while arid shrubland expanded across much of Africa. Since the deglaciation, forests have gradually expanded, with cold-adapted biomes shifting to higher latitudes. In the mid-latitudes, mixed forests and deciduous broadleaf forests increased in North America, Europe, and China. During the early to mid-Holocene, forests dominated in the mid- and low-latitudes, while tundra and taiga dominated in the high-latitudes. By the late Holocene, steppe and desert expanded in central North America and northern China, while tropical rainforests flourished in South America. The results further reveal that the global forest cover increased by ∼31 % from the LGM to the mid-Holocene, then decreased by ∼5 % at the late Holocene. In the mid-to high-latitudes of the Northern Hemisphere, forest cover varied significantly, rising notably from the LGM to the early and mid-Holocene, peaking around ∼7–5 ka BP, and declining after ∼5 ka BP. Conversely, the mid-latitudes of the Southern Hemisphere exhibited a more gradual pattern, with forest percentage peaking earlier ∼12–8 ka BP, and maintaining relatively stable afterward. Tropical regions had more erratic changes, initially fluctuating between 18 and 15 ka BP, followed by steady growth peaking ∼4–6 ka BP, and continued fluctuations thereafter. Our results reveal asynchronous vegetation changes across different global regions and provide a biome-level perspective, offering a finer classification of vegetation dynamics compared to previous global-scale studies. This dataset has the potential for comparison with palaeovegetation simulations, promoting better integration with different vegetation classification schemes. Moving forward, increasing the data density and integrating simulations will be crucial for a deeper exploration of the feedback mechanisms between vegetation evolution and climate change, thereby enhancing the accuracy of predictions of future vegetation dynamics.</div></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"729 ","pages":"Article 109780"},"PeriodicalIF":1.9,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143807650","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}

{"title":"Characteristics of the spatiotemporal differences in snowmelt phenology in the Northern Hemisphere","authors":"Xiaoyu Li ,&nbsp;Haoming Fan","doi":"10.1016/j.ejrh.2025.102358","DOIUrl":"10.1016/j.ejrh.2025.102358","url":null,"abstract":"<div><h3>Study region</h3><div>The Northern Hemisphere.</div></div><div><h3>Study focus</h3><div>Snowmelt processes are critical components of the hydrological cycle, significantly influenced by climate change. This study analyzes spring-summer snowmelt phenology and rates (1991–2022) using ERA5-Land data, focusing on spatiotemporal trends in snowmelt duration, rate heterogeneity, and drivers under climate change.</div></div><div><h3>New hydrological insights for the region</h3><div>The snowmelt period length (LSMD) shortens significantly (−0.129 day/year), notably in mid-high latitude North America and temperate Eurasia, while permanent snow zones show prolonged LSMD from intensified ablation. Snowmelt rates exhibit marked spatial heterogeneity: latitude-dependent dynamics peak in temperate-subarctic transition zones (55°-65°N), altitude-driven rates decline below 2800 m but rebound above 3400 m, and longitudinal patterns highlight higher rates in high-longitude regions. Maritime (MT) undergoes the most rapid and prolonged melting, contrasting with slower rates in forested/agricultural areas due to vegetation interactions. Dominantly low-intensity snowmelt prevails, yet transitions to higher intensities are pronounced at 45°-60°N. Regional “mean-extreme decoupling” implies deep snowpack energy storage-release mechanisms. These findings reveal complex, spatially divergent snowmelt responses to warming, critical for predicting hydrological and water resource impacts across the hemisphere.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"59 ","pages":"Article 102358"},"PeriodicalIF":4.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808783","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}

{"title":"Cobalt-rich diagenetic Mn-oxide mineralization in the Neogene onshore Pisco Basin, Peru","authors":"Ivana C. Carcamo-Valencia, Lisard Torró, Johan S. Ramírez-Briones, Luis Ayala, Joaquín A. Proenza, Thomas Aiglsperger, Patrice Baby","doi":"10.1007/s00126-025-01364-w","DOIUrl":"https://doi.org/10.1007/s00126-025-01364-w","url":null,"abstract":"<p>Sedimentary basin-hosted manganese oxides may represent an important yet underexplored source of critical metals. Here we present a stratigraphic, textural, mineralogical, and compositional characterization of Mn-oxide nodules, coatings, and veins in the Pisco onshore forearc basin, Peru. The Mn-oxide mineralization is stratabound within marine sandstone, siltstone, and tuff from the Neogene Chilcatay and Pisco formations. X-ray diffraction and electron microprobe analyses identify the Mn oxides as cryptomelane (± hollandite) and todorokite, which cement detrital grains and fossilize biological remains. Bulk chemical analyses of nodules, coatings, and veins reveal significant cobalt enrichment (mean = 0.17 ± 0.15 wt% Co; up to 0.63 wt% Co), corroborated by electron probe microanalysis of individual Mn oxide phases (mean = 0.37 ± 0.33 wt% Co; up to 2.1 wt% Co). The stratigraphic control, biomorphic replacement, mineralogy, and chemical composition collectively indicate a diagenetic origin for the Mn-oxide mineralization. The formation pathway likely involved organic matter decay or brine-hydrocarbon interactions coupled with Mn and Fe reduction, resulting in metal-enriched porewaters that circulated along structures and permeable horizons. Subsequent precipitation under oxygenated conditions occurred during late Pliocene uplift and exposure of the East Pisco Basin. This study demonstrates that diagenetic Mn oxides exposed in onshore basins represent a potential resource for manganese and critical elements such as cobalt.</p>","PeriodicalId":18682,"journal":{"name":"Mineralium Deposita","volume":"11 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814179","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}

{"title":"Correction to “Cascading, interactive, and indirect effects of climate change on aquatic communities, habitats, and ecosystems”","authors":"","doi":"10.1002/lno.70044","DOIUrl":"https://doi.org/10.1002/lno.70044","url":null,"abstract":"","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"23 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143813430","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}