📄 earth science

Spatiotemporal Variability and Recent Anomalies of ERA5-Derived Precipitation Extremes over North Sumatra, 2011-2025

This study utilizes ERA5 data and a multi-index framework to characterize the spatiotemporal variability of precipitation extremes in North Sumatra from 2011 to 2025, revealing that recent years, particularly 2023–2025, exhibited significant and spatially heterogeneous anomalies that cannot be captured by annual rainfall totals alone.

Putu Bagus Paramanandana, Adi Mulsandi2026-08-13
📄 earth science

Salt Chemistry Regulates Habitable Microenvironments in Brinicles: Implications for Icy Ocean Worlds

This study demonstrates that brine chemistry fundamentally dictates the microstructure of brinicles and the spatial distribution of cellular proxies, revealing that calcium chloride promotes localized entrapment near the inner channel while sodium chloride enables uniform distribution, thereby highlighting the critical role of ocean composition in assessing habitability on icy ocean worlds.

Madeline Garner, Marika Feduschak, Scott Perl, Heidi Smith, Christine Foreman2026-08-13
📄 earth science

Navigating the Complexity Trap: Deep Learning Optimization for Mapping Historic Surface Mines in Appalachian Terrain

This study develops an optimized deep learning framework using LiDAR-derived data and a Base U-Net architecture to effectively map historic surface mines in the forested Appalachian terrain, demonstrating that simpler models can outperform complex networks in avoiding over-segmentation while achieving an 81.4% overall accuracy.

Mohammad Nahyan, Aaron Maxwell, Michael Strager, Vincenzo Cribari, Stefania Staniscia2026-08-13
📄 earth science

Flow Profiling of a Geothermal Well Using an Isotherm-Slope Method Applied to Fiber-Optic Distributed Temperature Sensing Data: An Example from Utah FORGE EGS Well 16B(78)-32

This paper introduces and validates an isotherm-slope method that utilizes fiber-optic distributed temperature sensing (DTS) data to estimate wellbore flow profiles and stage-scale partitioning in enhanced geothermal systems without requiring repeated logging interventions or calibrated thermal properties.

Matthew W. Becker, Ghoulem Ifrene2026-08-13
📄 earth science

Mitigation Technologies for Wellbore Blockage Caused by Coal Powder Ejection from Surface Wells in Mining-Disturbed Areas: A Case Study

This paper investigates wellbore blockage caused by coal powder ejection in mining-disturbed surface wells and demonstrates that while high-pressure gas flushing and standpipes have limited effectiveness, installing a 1.0 mm metal mesh filter around the slotted pipe successfully mitigates plugging while maintaining high gas drainage efficiency.

Wei Qin, Yong Deng, Guozhong Hu, Jialin Xu, Wentao Ji, Lu Che, Haoran Duan2026-08-13
📄 earth science

Characteristics and impacts of La Niña diversity on Pacific teleconnections

This study characterizes the distinct seasonal evolution and teleconnection impacts of central versus eastern Pacific La Niña events, demonstrating that differentiating between these types is crucial for understanding their unique ocean-atmosphere interactions and resolving uncertainties regarding prolonged La Niña impacts under future climate warming.

Mandy B. Freund, Hanna Heidemann, Aditya Sengupta, Ruby Lieber, Navid Constantinou2026-08-13
📄 earth science

Super-Resolution of Radar/Rain Gauge–Analyzed Precipitation Using Gaussian Process Regression with a Steering Kernel

This study demonstrates that applying Super-Resolution Gaussian Process Regression with a Steering Kernel (SRGP-SK) to radar/rain gauge–analyzed precipitation effectively reconstructs finer convective structures and achieves higher structural similarity and spectral resolution compared to both standard SRGP and bicubic interpolation, though further validation across more cases is needed for broader application.

Shoichi AKAMI, Tsuyoshi T. SEKIYAMA, Mizuo KAJINO2026-08-13