Journal of Geophysical Research: Earth Surface最新文献

{"title":"Thank You to Our 2025 Reviewers","authors":"Ann Rowan,&nbsp;Jaap Nienhuis,&nbsp;Joel Sankey,&nbsp;Matthew Thomas","doi":"10.1029/2026JF009284","DOIUrl":"https://doi.org/10.1029/2026JF009284","url":null,"abstract":"<p>The Editors of the <i>Journal of Geophysical Research: Earth Surface</i> would like to express our thanks and appreciation to everyone who served as manuscript reviewers for this journal during 2025. We extend our thanks to the 921 reviewers who provided 1,240 reviews of manuscripts for <i>JGR: Earth Surface</i>. Finding the time to provide good quality and detailed peer reviews can be challenging, and requires individuals to take time from their own research to contribute to the progress of our field more widely. Providing peer review can also be a mentoring practice for early career colleagues, both through providing constructive feedback on their work and through co-reviewing as a means of training the next generation of peer reviewers. We greatly appreciate the large community of geomorphologists who have taken the time to write reviews, and particularly for providing constructive and critical feedback that guides authors to write the best possible paper about their research.</p>","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"131 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2026JF009284","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147708081","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":"Quantifying Seasonal Deformation Signals Using InSAR and Groundwater Models in the Mississippi River Delta, Baton Rouge, Louisiana","authors":"C. Hurtado-Pulido,&nbsp;K. Materna,&nbsp;A. B. A. Mohamed,&nbsp;C. J. Ebinger,&nbsp;F. T.-C. Tsai","doi":"10.1029/2025JF008889","DOIUrl":"https://doi.org/10.1029/2025JF008889","url":null,"abstract":"<p>Seasonal land motion can be caused by processes above or below Earth's surface, often linked to natural changes in the hydrological cycle. In coastal deltaic systems, the coupling of water level changes between rivers and aquifers may cause significant surface deformation, but this process is poorly understood. In this research, we show that land motion can be a proxy for groundwater level changes in layered and semi-confined aquifers, with implications for other delta systems worldwide. We investigate the processes driving the &gt;15 mm seasonal deformation in the Mississippi River Delta near Baton Rouge, Louisiana. We consider elastic deformation due to surface loading and poroelastic deformation caused by changes in groundwater levels. The underlying aquifer system is formed by almost-independent sands, crossed by the Mississippi and Amite Rivers, and cut by the Baton Rouge fault, which is a leaky barrier. We quantify seasonal deformation using Sentinel-1 Interferometric Synthetic Aperture Radar (InSAR), between 2016 and 2022 and validate the results with Global Navigation Satellite Systems (GNSS) data. We find that the amplitude of the seasonal response has spatial variations related to the distance to the Mississippi River and the Baton Rouge Fault. We identify which aquifer layers are in phase with the observations and are thus most likely to cause poroelastic deformation. Our results are supported by hydraulic properties from the literature for the aquifer system. We conclude that seasonal motion in the area is dominantly driven by the poroelastic response to Mississippi River level changes that recharge the shallower aquifer layers.</p>","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"131 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025JF008889","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147708095","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":"Real-Time Ground Deformation Records of Coastal Cliff Failures in San Diego County, California","authors":"Matthew J. Cook,&nbsp;Adam P. Young,&nbsp;Frank K. Wyatt,&nbsp;Mark A. Zumberge","doi":"10.1029/2025JF008562","DOIUrl":"https://doi.org/10.1029/2025JF008562","url":null,"abstract":"<p>Coastal cliff failures pose significant risks to public safety and coastal infrastructure, especially in southern California. We deployed a suite of continuous geophysical sensors to investigate failure processes and precursory behaviors at three coastal clifftop sites in San Diego County: San Elijo State Beach and two locations in Del Mar. Our sensors captured baseline and pre-failure signals, and cliff collapses, revealing patterns in ground deformation leading up to failure. Across all sites, we observed stages of accelerating ground displacement corresponding to the creep stage of imminent failure. Inconsistent best-fit functions highlight the complexity of cliff failure dynamics while velocity and acceleration relationships and inverse velocity provide more reliable indicators of imminent collapse, aligning with established slope failure models. Cliff failures often occur following storms, highlighting the influence of environmental factors, particularly rainfall, on erosion, instability, and failure. These findings demonstrate the benefits of continuous geophysical monitoring for characterizing cliff instability in near real-time and provide valuable insights for hazard mitigation and early warning applications.</p>","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"131 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025JF008562","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147708096","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":"Localized Calving Sensitivity at Perito Moreno Glacier (Patagonia) Revealed by Seismic Template Matching and Time-Lapse Images","authors":"Leoncio Cabrera,&nbsp;Edgardo Casanova,&nbsp;Rogelio Torres,&nbsp;Sergio Ruiz,&nbsp;Valeria Rojas,&nbsp;Masahiro Minowa,&nbsp;Douglas A. Wiens,&nbsp;Gino Casassa,&nbsp;Andreaw Rifo","doi":"10.1029/2025JF008688","DOIUrl":"https://doi.org/10.1029/2025JF008688","url":null,"abstract":"<p>Calving, the detachment of icebergs from glacier termini, is a dominant mode of mass loss for many glaciers, yet its spatial and temporal variability remains poorly understood. In this study, we analyze calving activity at the Brazo Rico front of Perito Moreno Glacier (Patagonia), through the integration of broadband seismic records, time-lapse photography, and satellite-derived surface velocity. We first synchronize seismic and photographic data collected between November 24 and 31 December 2018, identifying 88 calving events captured in both data sets. Then, 69 of these events were used as templates to apply template-matching detection, resulting in a catalog of 1,230 calving events. Our analysis reveals that calving activity is highly localized, with two frontal zones accounting for the majority of detections. These regions coincide with areas of pronounced frontal curvature and, in one case, elevated ice surface velocity, suggesting that both glacier geometry and dynamics promote local instability. The multi-sensor approach enhances detection capability and temporal resolution, offering new insights into the calving dynamics at lake-termination of Perito Moreno glacier. Continued integration of seismic, optical, and satellite observations will be essential for advancing our understanding of ice dynamics and improving projections of glacier response to climate change.</p>","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"131 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147707956","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":"Testing Nodal Point Relations by Tracking Sediment Through a Bifurcation on the Jefferson River, MT, USA","authors":"Matthew D. Wanker,&nbsp;Scott R. David,&nbsp;Rebecca L. Caldwell,&nbsp;Ye Jing,&nbsp;Douglas A. Edmonds","doi":"10.1029/2025JF008799","DOIUrl":"https://doi.org/10.1029/2025JF008799","url":null,"abstract":"<p>River bifurcations control water and sediment distribution in fluvial systems, but the physical mechanisms governing sediment partitioning remain poorly validated in natural rivers. We present a comprehensive field test of nodal point relations using radio frequency identification (RFID) tracking of 376 gravel clasts through a meandering river bifurcation in Montana, USA. The study bifurcation features key characteristics for testing existing theory: upstream channel curvature, a 40-cm bed ramp at the shallower bifurcate entrance, and unequal branch geometry. During the 2017 flood season, we recovered 202 (out of 376) clasts transported through the bifurcation, which divided nearly equally between bifurcate arms. Statistical analysis reveals that sediment partitioning is primarily controlled by upstream transverse position and longitudinal deployment distance, while grain size, shape, and mass show no significant influence. Calibrated Delft3D modeling combined with theoretical nodal point relations demonstrates that for curved bifurcations, helical flow and non-uniform incoming sediment push sediment in opposite directions. The nodal point relation that accounts for non-uniform incoming sediment distribution due to curvature best predicts the observed sediment delivery to the northern arm. Our results provide critical field validation showing that curvature-induced sorting begins well upstream of the bifurcation node, and the two curvature effects (helical flow deflection and non-uniform incoming sediment distribution) must both be included for accurate predictions. These findings advance our understanding of bifurcation mechanics and provide guidance for improving theoretical models and river restoration designs.</p>","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"131 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025JF008799","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147707850","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":"UAV Oblique Imagery Reveals Order-of-Magnitude Changes in Snow Aerodynamic Roughness Length Under Shifting Meteorological Regimes at Qinling Station, East Antarctica","authors":"Zhuo Zheng,&nbsp;Lei Zheng,&nbsp;Kang Wang,&nbsp;Gary D. Clow,&nbsp;Xiao Cheng","doi":"10.1029/2025JF008781","DOIUrl":"https://doi.org/10.1029/2025JF008781","url":null,"abstract":"&lt;p&gt;Snow aerodynamic roughness length (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;z&lt;/mi&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${mathscr{z}}_{0}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;) plays a critical role in Antarctic surface energy and mass balance. Yet, &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;z&lt;/mi&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${mathscr{z}}_{0}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; is conventionally treated as a constant in turbulent flux calculations. Fine-scale spatiotemporal variations in &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mspace&gt;&lt;/mspace&gt;\u0000 &lt;mi&gt;z&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${hspace*{.5em}mathscr{z}}_{0}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; remain largely unmonitored. This study employed multi-temporal uncrewed aerial vehicle oblique photogrammetry to construct digital surface models and estimate &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;z&lt;/mi&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${mathscr{z}}_{0}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; values for various underlying surfaces and weather conditions with the bulk-aerodynamic method at Qinling Station, East Antarctica. The results demonstrate similar spatial distribution patterns among five &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;z&lt;/mi&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${mathscr{z}}_{0}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; estimation models, yet reveal an order-of-magnitude discrepancy in absolute values. The &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;z&lt;/mi&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${mathscr{z}}_{0}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; values in snow sastrugi areas are approximately an order of magnitude lower than those in rock areas. Snow surface &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;z&lt;/mi&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${mathscr{z}}_{0}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; shows high sensitivity","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"131 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147707869","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":"The Role of Internal Sedimentologic and Biotic Structure in Moderating Storm-Induced Dune Erosion","authors":"Elizabeth H. Davis,&nbsp;Christopher J. Hein,&nbsp;Nicholas Cohn,&nbsp;Julie C. Zinnert","doi":"10.1029/2025JF008878","DOIUrl":"https://doi.org/10.1029/2025JF008878","url":null,"abstract":"<p>Laboratory studies indicate that the magnitude of coastal foredune erosion during high-energy events is influenced by the belowground biomass and sediment grain size of those dunes. However, the extent to which dune architecture mediates wave-induced erosion in natural settings is largely unknown. Here, we relate the internal sedimentologic and biotic structure of foredunes with pre- and post-storm beach and dune morphology to determine if the presence of a complex internal dune structure can reduce storm erosion. We quantified dune volume change from five moderate-size storms at six proximal dunes characterized by a diversity of internal sedimentologic and ecologic complexity. Dune volume change associated with a single storm ranged from −9.33 to +1.65 m³/m and varied significantly between sites. Results of multiple linear regression indicate that 25%–78% of observed erosion associated with these moderate storms is explained by antecedent beach and dune morphology and hydrodynamic storm conditions. Within the resolution of the available data set, we found that a complex internal structure is unlikely to substantially reduce dune erosion during mild to moderate storm events. Instead, the role of the internal structure could be more apparent during high-energy events when the influence of pre-storm morphology is weakened as the beach profile adjusts to wave conditions. Our findings ultimately enhance our understanding of the controls of dune erosion for varying storm regimes and underscore the pivotal influence of pre-storm profile morphology—more so than intrinsic properties of the dune itself—for mild to moderate storm events.</p>","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"131 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025JF008878","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147707906","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":"Grounding-Zone Wedge Formation and Effects on Ice-Stream Retreat and Stability","authors":"John Erich Christian,&nbsp;Alexander A. Robel,&nbsp;Ginny Catania,&nbsp;Leigh Stearns,&nbsp;Lauren E. Miller,&nbsp;Santiago Munevar Garcia","doi":"10.1029/2025JF008509","DOIUrl":"https://doi.org/10.1029/2025JF008509","url":null,"abstract":"<p>Ice streams deposit sediment at their grounding lines, where ice reaches flotation. Grounding Zone Wedge (GZW) deposits indicate stillstands in past grounding-line retreat, and are thought to stabilize grounding lines by reducing local water depth, restricting ice flow. However, the mechanisms of GZW growth are uncertain, as are the effects of sedimentation on a retreating grounding line prior to GZW formation. We develop a 1-D coupled model of ice flow and sediment evolution, considering simplified treatments of both subglacial deposition of deforming sediments, and proglacial melt-out of entrained sediments from ice shelves. A refined grid near the grounding line resolves small sediment features and their effect on ice dynamics. The model simulates the growth of low-amplitude, prograding, asymmetric features consistent with observed GZWs. We find that the characteristic shape of GZWs arises from the coupling of sedimentation and ice dynamics. This mechanism is consistent with deposition from either deforming or entrained sediments, and does not require an ice shelf to limit vertical GZW growth. We also find that during grounding-line retreat, sedimentation provides a stabilizing feedback when other factors initially slow retreat. This may turn a slowdown in retreat into a long stillstand, even when ice fluxes are far out of equilibrium. The feedback depends on total sediment flux and its spatial pattern of deposition, making these priorities for future study. Our study suggests that sedimentation might significantly extend pauses in deglaciation, and the model provides a new tool for exploring links between ice-stream dynamics and submarine landforms.</p>","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"131 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025JF008509","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147708373","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":"Coupled Pore Water Pressure Generation and Shear Thinning Rheology Control the Hypermobility of Co-Seismic Loess Landslides","authors":"Shun Wang,&nbsp;Ruijun Wang,&nbsp;Dianqing Li,&nbsp;Xuan Kang,&nbsp;Wei Wu","doi":"10.1029/2025JF009062","DOIUrl":"https://doi.org/10.1029/2025JF009062","url":null,"abstract":"<p>Seismic liquefaction in loess deposits can trigger catastrophic long-runout landslides, yet existing studies typically treat liquefaction triggering and post-failure flow mobility as separate processes, leaving the physical linkage between initiation and motion poorly constrained. This study integrates undrained ring shear test and rheological test to investigate how the coupled evolution of pore water pressure, shear rate, and rheology governs both the onset of seismic liquefaction and the subsequent hypermobile flow behavior of loess. Test results show that the liquefaction of the loess sample under low shear stress occurs only as initial pore water pressure generation to a certain threshold. Dynamic perturbation of low-frequency and high-amplitude cyclic loading promotes the onset of liquefaction failure. Following liquefaction, the loess exhibits pronounced shear thinning behavior, characterized by a rapid viscosity reduction with increasing shear rate. This rate-dependent weakening establishes a positive feedback between acceleration and viscosity loss, enabling sustained high mobility during fast shearing. By explicitly linking seismic liquefaction triggering with post-failure flow rheology, this study identifies critical pore water pressure, shear rate, and viscosity thresholds as key precursors, providing a framework for improving hazard prediction and risk mitigation of co-seismic loess landslides worldwide.</p>","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"131 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147708374","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":"Hydrometeorological and Topographic Controls on Rock Glacier Kinematics: A Case Study From Southeastern Alaska","authors":"Qingyu Sui,&nbsp;Zhong Lu,&nbsp;Tyler M. Meng,&nbsp;Jinwoo Kim,&nbsp;Bretwood Higman,&nbsp;Chunli Dai,&nbsp;Emmanuel Junior Budukumah,&nbsp;Sam McColl,&nbsp;Ian Howat,&nbsp;Chad Hults,&nbsp;Vamshi Karanam,&nbsp;Kang Liang","doi":"10.1029/2025JF008895","DOIUrl":"https://doi.org/10.1029/2025JF008895","url":null,"abstract":"<p>Rock glacier kinematics are indicators of alpine climate change, yet the relative influence of thermal and hydrological processes on their motion remains poorly constrained. This uncertainty limits our ability to predict how these permafrost landforms will respond to ongoing climate change. Here, we present a mechanistic case study of seven active rock glaciers in Wrangell–St. Elias National Park, Alaska (USA) was selected to span contrasting aspects, snow insulation, and kinematic behavior. Using multi-temporal Sentinel-1 interferometric synthetic aperture radar (InSAR) data from 2018 to 2022, we derived high-resolution (∼30 m) velocity maps and deformation time series by combining ascending and descending observations and assuming predominantly downslope motion. Independent Component Analysis (ICA) was applied to separate long-term trends from seasonal signals, enabling the characterization of deformation components associated with environmental forcing. We then quantified the water infiltration effects by estimating hydraulic conductivity from the observed lag times between snowmelt and seasonal deformation peaks. Subsurface thermal regimes were simulated using the CryoGrid land surface and permafrost model. Results reveal that rock glaciers with greater solar radiation and warmer subsurface conditions exhibit enhanced meltwater infiltration and stronger seasonal deformation, while colder, shaded sites remain relatively stable. This combined InSAR, ICA, hydraulic, and thermal analysis highlights how hydrological and thermal controls govern spatial variability in rock glacier kinematics, offering insights into the sensitivity of permafrost landforms to ongoing climate change.</p>","PeriodicalId":15887,"journal":{"name":"Journal of Geophysical Research: Earth Surface","volume":"131 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025JF008895","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147708355","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}