📄 earth science

Extreme early-spring polar jet shifts reduce warm-season runoff in the snow-dominated upper Colorado River Basin

This study demonstrates that extreme northward shifts of the polar jet stream during early spring over western North America drive significantly warmer and drier conditions in the upper Colorado River Basin, leading to substantial snowpack loss and a 12.6–23.3% reduction in warm-season runoff primarily driven by precipitation deficits.

Yuan Qiu, James Famiglietti, Guo-Yue Niu, Ali Behrangi2026-09-01
📄 earth science

Ranking uncertainties in EGF near-fault strong motion predictions: Application to the Middle Durance Fault (France)

This study ranks uncertainties in Empirical Green's Function (EGF) near-fault ground-motion predictions for the Middle Durance Fault, revealing that EGF source parameters (particularly seismic moment and stress drop) are the dominant contributors to variability, while a single EGF located close to the station can yield reliable predictions despite significant epistemic uncertainties.

Elias El Haber, Mathieu Causse, David Castro-Cruz, Ludivine Saint-Mard, Fabrice Hollender2026-09-01
📄 earth science

Spatiotemporal dynamics and driving mechanisms of carbon emissions from China’s expressway operations

This study presents a nationwide, high-resolution analysis of China's 2024 expressway operational CO₂ emissions, revealing that emissions are heavily concentrated on major trunk corridors and exhibit significant monthly fluctuations driven by congestion-induced speed reductions, thereby highlighting the critical need for fine-scale temporal data to inform effective transport decarbonization strategies.

Panyue Zhang, zhuohan liu, yajie Zhang, guangming zhang2026-09-01
📄 earth science

Magnetic Signatures and Geochemical Fingerprints of Heavy-Mineral Black Sands Along the Bayelsa Coast, Niger Delta

This study integrates aeromagnetic, geological, and geochemical data to identify a heavy-mineral placer system along the Bayelsa coast of the Niger Delta, characterized by shallow magnetic anomalies and a distinct Zr–Ti–Fe geochemical signature, while recommending further investigation to fully assess its economic potential.

Francis Omonefe, Edeye Ejaita, Christopher Unyime Ebong2026-09-01
📄 earth science

Temporal-scale-dependent regulation of ecosystem carbon exchange by meteorological and hydrological drivers in a small riverine wetland of the middle Yellow River

This study utilizes one year of eddy covariance data from the Sanhekou wetland in the middle Yellow River to demonstrate that meteorological and hydrological drivers regulate ecosystem carbon exchange through distinct linear and nonlinear mechanisms that vary significantly across temporal scales, ultimately confirming the wetland's role as a seasonal carbon sink.

Jingru Zhang, Lin Liu, Xiaohuang Liu, Dongdong Wang, Shikai Fan, Hailong Zhao, Bo Wang, Zhicai Guo, Zhiping Luo2026-09-01
📄 earth science

Revealing Stratosphere-Troposphere Interactions via Regime-Based Transfer Entropy

This paper introduces a regime-based Transfer Entropy framework that overcomes the curse of dimensionality in high-dimensional atmospheric systems to reveal complex, state-dependent, and non-linear causal couplings between the stratosphere and troposphere, including distinct memory timescales and a multi-week positive feedback loop.

Dmitry Mukhin, Roman Samoilov, Abdel Hannachi, Alexander Feigin2026-09-01
📄 earth science

Historical Baseline Assessment of Coastal Pollution in Bou Ismaïl Bay (Algeria) Using a Multi- Compartment Biomonitoring Approach

This study establishes a historical baseline for Bou Ismaïl Bay, revealing that varying levels of anthropogenic pressure have caused severe eutrophication, fecal contamination, and trace element accumulation, leading to the significant degradation of *Posidonia oceanica* meadows and highlighting the urgent need for improved wastewater management in the region.

Rachida GHALMI, Fateh TARMOUL, Juba CHABANE2026-09-01