Journal of Geophysical Research: Earth Surface最新文献_第7页

Radar-Derived Crystal Orientation Fabric Suggests Dynamic Stability at the Summit of Hercules Dome 雷达导出的晶体取向织物表明大力神圆顶顶部的动态稳定性

IF 3.5 2区地球科学

Journal of Geophysical Research: Earth Surface Pub Date : 2025-02-25 DOI: 10.1029/2023JF007588

B. H. Hills, N. Holschuh, A. O. Hoffman, A. N. Horlings, E. Erwin, L. R. Kirkpatrick, T. J. Fudge, E. J. Steig, K. Christianson

{"title":"Radar-Derived Crystal Orientation Fabric Suggests Dynamic Stability at the Summit of Hercules Dome","authors":"B. H. Hills, N. Holschuh, A. O. Hoffman, A. N. Horlings, E. Erwin, L. R. Kirkpatrick, T. J. Fudge, E. J. Steig, K. Christianson","doi":"10.1029/2023JF007588","DOIUrl":"https://doi.org/10.1029/2023JF007588","url":null,"abstract":"Hercules Dome is a prospective ice-core site due to its setting in the bottleneck between East and West Antarctica. If ice from the last interglacial period has been preserved there, it could provide critical insight into the history of the West Antarctic Ice Sheet. The likelihood of a continuous, well-resolved, easily interpretable climate record preserved in ice extracted from Hercules Dome depends in part on the persistence of ice-flow dynamics at the divide. Significant changes in ice drawdown on either side of the divide, toward the Ross or Ronne ice shelves, could change the relative thickness of layers and the deposition environment represented in the core. Here, we use radar sounding to survey the ice flow at Hercules Dome. Repeated radar acquisitions show that vertical velocities are consistent with expectations for an ice divide with a frozen bed. Polarimetric radar acquisitions capture the ice-crystal orientation fabric (COF) which develops as ice strains, so it depends on both the pattern of ice flow and the time over which flow has been consistent. We model the timescales for COF evolution, finding that the summit of Hercules Dome has been dynamically stable in its current configuration, at least over the last five thousand years, a time period during which the Antarctic ice sheet was undergoing significant retreat at its margins. The evident stability may result from a prominent bedrock ridge under the divide, which had not been previously surveyed and has therefore not been represented in the bed geometry of coarsely resolved ice-sheet models.","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"130 3","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489881","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

Widespread Expansion of Salt Marsh Pools Observed on Maine Marshes Since 2009 自2009年以来，在缅因州沼泽观察到盐沼池的广泛扩张

IF 3.5 2区地球科学

Journal of Geophysical Research: Earth Surface Pub Date : 2025-02-25 DOI: 10.1029/2024JF007948

K. DeWater, W. Kochtitzky, R. Ellis, P. Merrill, M. Pittsley, P. Morgan, C. Burns, A. Campbell, S. Adamowicz

{"title":"Widespread Expansion of Salt Marsh Pools Observed on Maine Marshes Since 2009","authors":"K. DeWater, W. Kochtitzky, R. Ellis, P. Merrill, M. Pittsley, P. Morgan, C. Burns, A. Campbell, S. Adamowicz","doi":"10.1029/2024JF007948","DOIUrl":"https://doi.org/10.1029/2024JF007948","url":null,"abstract":"Salt marshes provide critical habitats, protect coastal infrastructure, and are increasingly exposed to sea level rise, with many having a history of agricultural use and ditching over the centuries. Pool area coverage can be considered an indicator of marsh health but is rarely quantified. In this study, we digitized marsh pools using aerial imagery to quantify changes in pool area and density on 12 salt marshes in Maine from 2009 to 2021 as a case study of marsh response to environmental changes. We categorized pools into three types: mega-pools, individual pools, and perimeter pools, based on morphology and examined whether pools remained singular, split, or combined. We found a 15.7% increase in pool area from 2009 to 2021 on all marshes, primarily driven by mega-pool expansion, whereas individual and perimeter pools remained relatively constant. The rate of pool expansion across all marshes was 49,000 m2 a−1 with mean mega-pool size 6,400 ± 400 m2. There was an increase in pool count per km2 on all marshes except for the York River marsh, which still experienced area expansion. Pools primarily increase in cover through merging or being engulfed by mega-pools. Area cover change was not substantial when pools remained singular, split into many pools, or were only present in 2009 or 2021. Mega-pools were larger on lower marsh elevations and expanded at a greater rate when overlapping ditches, suggesting influence by sea level rise and historic agriculture. Marsh restoration projects that promote the drainage and re-vegetation of mega-pools may reverse this trend.","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"130 2","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JF007948","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481334","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

Controls of Morphometric and Climatic Catchment Characteristics on Debris Flow and Flood Hazard on Alluvial Fans in High Mountain Asia: A Machine Learning Approach 亚洲高山冲积扇地形特征和气候集水区特征对泥石流和洪水灾害的控制：机器学习方法

IF 3.5 2区地球科学

Journal of Geophysical Research: Earth Surface Pub Date : 2025-02-25 DOI: 10.1029/2024JF008029

Varvara O. Bazilova, Tjalling de Haas, Walter W. Immerzeel

{"title":"Controls of Morphometric and Climatic Catchment Characteristics on Debris Flow and Flood Hazard on Alluvial Fans in High Mountain Asia: A Machine Learning Approach","authors":"Varvara O. Bazilova, Tjalling de Haas, Walter W. Immerzeel","doi":"10.1029/2024JF008029","DOIUrl":"https://doi.org/10.1029/2024JF008029","url":null,"abstract":"Debris flows and floods pose considerable hazards to populated areas of High Mountain Asia (HMA). Debris flows are generally more hazardous than floods, and therefore identification of process type is important for hazard assessment and mitigation. Prior statistical assessments, though informative, typically considered a limited number of parameters, excluded climatic variables, and failed to address classification probability and uncertainty. Here we developed a machine learning model to determine process type and its likelihood for a diverse set of 1,793 catchments in HMA using a wide range of morphometric and climatic parameters. We classified the alluvial fans of these catchments as either debris flow or flood dominated based on surface morphology. A data set of morphometric (e.g., catchment area, slope, relief, Melton ratio) and climatic features (e.g., temperature and precipitation regime, freeze–thaw cycles, glacier and permafrost presence) per catchment was subsequently built, and a CatBoost machine learning model to quantify debris flow and flood probabilities was employed. The CatBoost model has a high classification accuracy compared to traditional approaches, and offers the advantage of providing classification uncertainty. Results show that catchment slope, area, and perimeter are the main morphometric controls on process type across HMA, in line with previous work, and further show that including climate information leads to a minor improvement of model performance. These findings shed light on controls on debris flow and flood occurrence in mountainous area, showcase the potential of machine learning models in mountain hazard research, and provide insights for assessing risks.","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"130 2","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JF008029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481335","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

Automated Mapping of Braided Palaeochannels From Optical Images With Deep Learning Methods 基于深度学习方法的光学图像编织古通道自动映射

IF 3.5 2区地球科学

Journal of Geophysical Research: Earth Surface Pub Date : 2025-02-20 DOI: 10.1029/2024JF008051

F. Vanzani, P. Carbonneau, A. Fontana

{"title":"Automated Mapping of Braided Palaeochannels From Optical Images With Deep Learning Methods","authors":"F. Vanzani, P. Carbonneau, A. Fontana","doi":"10.1029/2024JF008051","DOIUrl":"https://doi.org/10.1029/2024JF008051","url":null,"abstract":"The increasing availability of remotely sensed data has provided an enormous quantity of information for studying the geomorphology of exposed surfaces of alluvial plains. In many cases, the key for reconstructing their formation lies in the recognition of optical traces related to abandoned palaeochannels and their morphometric characteristics. Abundant braided palaeohydrographic traces are documented in alluvial plains of northern Italy, where large sectors of the present surface correspond to landforms related to fluvioglacial systems supplied by Alpine glaciers during the Last Glacial Maximum (LGM). Nevertheless, the complexity of multichannel patterns, the overlapping field division systems and urbanization, hinder the efforts to manually map these traces. In this work, we used high-resolution aerial photos of the proximal sector of the Friulian Plain (NE Italy) to train an Attention-UNet deep learning algorithm to segment palaeohydrographic traces. The trained model was used to automatically recognize braided palaeochannels over 232 km2. The resulting map represents a significant step for investigating the long-term alluvial dynamics. Moreover, we assessed the robustness of our method by deploying the model in three other areas in northern Italy with comparable characteristics, as well as in Montenegro, near Podgorica. In each case, the braided pattern was successfully mapped by the algorithm. This work highlights the breakthrough potential of deep learning methods to rapidly detect complex geomorphological traces in cultivated plains, taking into consideration advantages, challenges and limitations.","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"130 2","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JF008051","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446662","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

Knickpoint Dynamics During the Outward Growth of the Northeastern Tibetan Plateau 青藏高原东北部向外生长过程中的断裂点动力学

IF 3.5 2区地球科学

Journal of Geophysical Research: Earth Surface Pub Date : 2025-02-19 DOI: 10.1029/2024JF007820

Zhengchen Li, Xianyan Wang, Xiaoping Yuan, Chuanqi He, Qi Su, Huayu Lu

{"title":"Knickpoint Dynamics During the Outward Growth of the Northeastern Tibetan Plateau","authors":"Zhengchen Li, Xianyan Wang, Xiaoping Yuan, Chuanqi He, Qi Su, Huayu Lu","doi":"10.1029/2024JF007820","DOIUrl":"https://doi.org/10.1029/2024JF007820","url":null,"abstract":"Mountain-building events often initiate fluvial erosion waves that usually propagate upstream. Previous studies have delved into the erosion wave, manifested as knickpoint migration, presuming a spatially consistent uplift of plateaus. However, the expansion of plateaus can spatially result in spatially variable rock uplift rates across different regions, complicating our understanding of knickpoint dynamics. In this study, conducted at the edge of the northeastern Tibetan Plateau, we investigated the impact of plateau expansion on erosion wave processes within the upper Yellow River basin. Through river profile analyses and landscape evolution simulations, we reveal that the continuous outward expansion of the northeastern Tibetan Plateau into its periphery has induced localized uplift followed by erosion. Subsequently, an erosion wave migrated headward along the Yellow River during the Pleistocene. Observations from the Digital Elevation Model and modeling results show that this erosion wave spread within the tectonically active sub-block at the margin of the plateau, but did not continue further upstream. In contrast, modeling results suggest that erosion waves would consistently migrate upstream under conditions of spatially uniform rock uplift. Our findings highlight that spatially variable rock uplift rates, driven by the expansion of the plateau, are crucial in determining whether fluvial erosion waves migrate or remain stationary. This refined understanding of knickpoint dynamics during plateau development offers insights into the persistence of relict high-elevation and low-relief landscapes.","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"130 2","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143439154","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

Two Decades of Dust Radiative Forcing on Snow Cover Across the Great Salt Lake Basin 大盐湖盆地20年积雪的尘埃辐射强迫

IF 3.5 2区地球科学

Journal of Geophysical Research: Earth Surface Pub Date : 2025-02-18 DOI: 10.1029/2024JF007957

Otto I. Lang, Patrick Naple, Derek Mallia, Ty Hosler, Bradley Adams, S. McKenzie Skiles

{"title":"Two Decades of Dust Radiative Forcing on Snow Cover Across the Great Salt Lake Basin","authors":"Otto I. Lang, Patrick Naple, Derek Mallia, Ty Hosler, Bradley Adams, S. McKenzie Skiles","doi":"10.1029/2024JF007957","DOIUrl":"https://doi.org/10.1029/2024JF007957","url":null,"abstract":"Seasonal snowpacks in mountain drainages of the Great Salt Lake Basin (GSLB), western United States, are the primary surface water supply to regional agriculture, the metropolitan Wasatch Front, and the terminal Great Salt Lake. Spring dust emissions from the eastern Great Basin result in a dust-darkened GSLB snowpack, locally accelerating snowmelt relative to dust-free conditions. Such acceleration has been linked to streamflow forecasting errors in the adjacent Colorado River Basin, but snow darkening impacts within the GSLB are largely uninvestigated. To quantify the dust impact, we analyzed patterns in dust radiative forcing (RFdust) over the MODIS record (2001–2023) using spatially and temporally complete RFdust and fractional snow-covered area products. For validation, retrievals were cross-referenced with in situ RFdust observations. Results showed that RFdust was present every year and had no significant trend over the record. Spatially, RFdust was similar across all three subbasins. Temporally, RFdust exhibited high interannual variability (−30 to +40 Wm−2 from record means) and has declined slightly in regions of the eastern GSLB. Controls of RFdust may be linked to seasonal meteorology and drought conditions, but drivers remain uncertain. Further understanding of the distribution and controls of RFdust in the GSLB during changing climate and weather patterns may allow us to predict snowmelt more accurately.","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"130 2","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JF007957","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431785","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

Future Trajectories of Peatland Permafrost Under Climate and Ecosystem Change in Northeastern Canada 气候和生态系统变化下加拿大东北部泥炭地永久冻土的未来轨迹

IF 3.5 2区地球科学

Journal of Geophysical Research: Earth Surface Pub Date : 2025-02-16 DOI: 10.1029/2024JF007930

Yifeng Wang, Robert G. Way

{"title":"Future Trajectories of Peatland Permafrost Under Climate and Ecosystem Change in Northeastern Canada","authors":"Yifeng Wang, Robert G. Way","doi":"10.1029/2024JF007930","DOIUrl":"https://doi.org/10.1029/2024JF007930","url":null,"abstract":"Peatland permafrost ecosystems include culturally and ecologically important habitats for plants and wildlife. Widespread degradation of palsas and peat plateaus suggests vulnerability of these landforms to climate warming, but ecosystem changes, including landscape greening due to shrub expansion and related changes in snow distribution, are also expected to impact permafrost persistence. In this study, a process-based one-dimensional transient model is used to simulate an ensemble of future ground temperature trajectories for seven palsa and two peat plateau study sites along the Labrador Sea coastline. Ground temperatures are modeled from 2024 to 2100 under nine scenarios, which account for differences in future land cover, snow, and climate warming (RCP4.5 and RCP8.5). All scenarios incorporating a change in ecosystem characteristics and/or climate result in loss of permafrost at all sites by 2100, with some sites experiencing loss of permafrost by 2036. Although permafrost thaw occurs at all sites under most scenarios, the sites exhibit wide variations in thaw rates due to differences in latitude, geomorphological characteristics, and initial permafrost thicknesses. Most sites experience active layer thickening, but four of the nine sites also see the development of supra-permafrost taliks, though this occurs almost exclusively in the scenarios that incorporate ecosystem change. The development of taliks under these scenarios and the earlier loss of permafrost suggest that peatland permafrost in coastal Labrador may be more sensitive to ecosystem change than climate warming alone. These results provide important insights into the future evolution and climate sensitivity of permafrost peatlands in the discontinuous permafrost zone.","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"130 2","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JF007930","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423892","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

Deciphering Landslide Precursors From Spatiotemporal Ground Motion Using Persistent Homology 利用持续同源性从时空地面运动中破译滑坡前兆

IF 3.5 2区地球科学

Journal of Geophysical Research: Earth Surface Pub Date : 2025-02-13 DOI: 10.1029/2024JF007949

Jiangzhou Mei, Gang Ma, Chengqian Guo, Ting Wu, Jidong Zhao, Wei Zhou

{"title":"Deciphering Landslide Precursors From Spatiotemporal Ground Motion Using Persistent Homology","authors":"Jiangzhou Mei, Gang Ma, Chengqian Guo, Ting Wu, Jidong Zhao, Wei Zhou","doi":"10.1029/2024JF007949","DOIUrl":"https://doi.org/10.1029/2024JF007949","url":null,"abstract":"Landslides are major natural disasters that pose significant challenges for prediction. Recent advances in monitoring tools have led to the accumulation of monitoring data with high spatiotemporal resolution, calling for new and robust methodologies to efficiently analyze these complex big data and accurately predict landslides. Here, we present a persistent homology-based method that integrates the slope-scale monitoring data from interferometric synthetic aperture radar with novel measures of spatiotemporal evolution of slope deformation to identify early warning precursors for impending landslides. Our proposed method can capture critical patterns of accelerated deformation evolution and generate warning signals long before the landslide occurrence. Six case studies confirm the effectiveness and accuracy of the proposed method in landslide prediction, with a leading time exceeding 100 days for the Xinmo and Mud Creek landslides. Strong spatiotemporal correlations of slope deformation underscore long-range effective predictions. Our method offers a new, robust alternative to the conventional threshold-based approach for understanding and predicting landslides in natural slopes.","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"130 2","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404466","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

Shoreline Seasonality of California's Beaches 加州海滩的海岸线季节性

IF 3.5 2区地球科学

Journal of Geophysical Research: Earth Surface Pub Date : 2025-01-30 DOI: 10.1029/2024JF007836

Jonathan A. Warrick, Daniel Buscombe, Kilian Vos, Hannah Kenyon, Andy C. Ritchie, Mitchell D. Harley, Catherine Janda, Jess L’Heureux, Sean Vitousek

{"title":"Shoreline Seasonality of California's Beaches","authors":"Jonathan A. Warrick, Daniel Buscombe, Kilian Vos, Hannah Kenyon, Andy C. Ritchie, Mitchell D. Harley, Catherine Janda, Jess L’Heureux, Sean Vitousek","doi":"10.1029/2024JF007836","DOIUrl":"https://doi.org/10.1029/2024JF007836","url":null,"abstract":"We report on remote sensing techniques developed to characterize seasonal shoreline cycles from satellite-derived shoreline measurements. These techniques are applied to 22-yr of shoreline measurements for over 777 km of beach along California's 1,700-km coast, for which the general understanding is that shorelines exhibit winter-narrow and summer-recovery seasonality. We find that approximately 90% of beach transects exhibit significant and recurring seasonal cycles in the shoreline position. Seasonal shoreline excursions are twice as large in northern and central California (17.5–32.2 m) than southern California (7.3–15.9 m; interquartile ranges). Clustering analyses were effective at characterizing the temporal patterns of the seasonality, revealing that ∼459 km of beach (59%) exhibit winter-narrow conditions, whereas ∼189 km (24%) and ∼50 km (6.4%) exhibit spring-narrow and summer-narrow conditions, respectively. These spring- and summer-narrow conditions are most common in southern California, where they represent over half of the total length of beach shoreline. Multivariate analyses reveal that wave climate and geomorphic setting are significantly related to the magnitude and timing of shoreline seasonal cycles. Combinations of these variables explain 44% of the seasonality variance of the complete data set and 85% of the variance for a subset of 93 long (>1 km) continuous beaches. We conclude that diversity in waves and geomorphic setting along California cause a broad range of seasonal patterns in the shoreline. Combined, this indicates that the overly generalized “winter-narrow/summer-recovery” conventions for California beaches are not expressed universally and that shoreline seasonality is far more diverse than these simple canonical rules.","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"130 2","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JF007836","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143120984","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

Exploring Controls on Post-Orogenic Topographic Stasis of the Pyrenees Mountains With Inverse Landscape Evolution Modeling 用逆向景观演化模型探讨比利牛斯山造山后地形停滞的控制因素

IF 3.5 2区地球科学

Journal of Geophysical Research: Earth Surface Pub Date : 2025-01-29 DOI: 10.1029/2024JF007759

Magdalena Ellis Curry, Peter van der Beek

{"title":"Exploring Controls on Post-Orogenic Topographic Stasis of the Pyrenees Mountains With Inverse Landscape Evolution Modeling","authors":"Magdalena Ellis Curry, Peter van der Beek","doi":"10.1029/2024JF007759","DOIUrl":"https://doi.org/10.1029/2024JF007759","url":null,"abstract":"How high topography can be sustained over long timescales in post-orogenic mountain belts is a longstanding research question in tectonic geomorphology and geodynamics. Here we utilize the well-documented orogenic paleo-topography and spatial-temporal exhumation patterns of the Pyrenee Mountains in a numerical modeling study investigating controls on post-orogenic topographic stasis. Orogenic activity in the Pyrenees Mountains ceased at ca. 25-20 Ma, but topographic decay has only been on the scale of hundreds of meters since that time. We use the landscape-evolution model FastScape coupled with the neighborhood-algorithm inversion method to explore the influence of precipitation, lithology, and stream power parameters on post-orogenic topographic stability. The inversions are constrained using topography (elevation, slope) and low-temperature thermochronology data. We find that incorporation of an erodibility threshold is required for moderating post-orogenic topographic decay, without which post-orogenic topography declines significantly on Myr timescales. While other evaluated parameters such as lithology and precipitation also contribute to topographic stability, they are secondary to the erodibility threshold in maintaining long-term post-orogenic topography. Our results provide valuable insights into the mechanisms governing post-orogenic landscape evolution and emphasize the importance of thresholds in landscape evolution modeling of mountain belts.","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"130 2","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JF007759","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143120649","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