📄 earth science

Sewer Gas Intrusion from Noncompliant Plumbing: A Scenario-Based Quantitative Risk Assessment of Two Renovated Hotels in China

This study demonstrates that noncompliant plumbing in two renovated Chinese hotels caused chronic sewer gas (H₂S) intrusion, resulting in hazard quotients that frequently exceeded regulatory thresholds for long-term staff exposure and highlighting the critical need for stricter code enforcement and mandatory post-installation inspections.

Alex A. Volinsky2026-10-05
📄 earth science

Effects of soil properties, stand structure, and species diversity on forest ecosystem carbon stocks in a cold- temperate watershed of northeastern China

This study quantifies carbon stocks across vegetation and soil pools in the cold-temperate forests of northeastern China's Ergong River Basin, revealing that soil is the dominant carbon reservoir and that total ecosystem carbon is primarily driven by soil nutrient status, stand structure, and species dominance.

Zhongzhou FAN, Chuanfang ZHOU, Haifeng WEI, Shaojie BIAN, Qi GUO, Yanfeng SUN, Xuefeng TANG, Xiaoyong WEI, Yue MA, Mingz (…)2026-10-05
📄 earth science

Snow droughts enhance carbon uptake in energy-limited ecosystems but reduce it in water-limited ones

By integrating vegetation model simulations with observational data, this study reveals that snow droughts generally enhance annual carbon uptake in energy-limited ecosystems while reducing it in water-limited ones, with these effects persisting regardless of subsequent spring and summer moisture conditions.

Mariangela Varela, Franziska Koch, Christoph Jörges, David Gampe2026-10-05
📄 earth science

The Formation Mechanisms of Layered Structures in the Subtropical Troposphere Revealed by Integrated Analysis of Sonde and Atmospheric Reanalysis Data

This study challenges the conventional reliance on ozone-potential temperature correlation to attribute layered atmospheric structures to gravity waves, demonstrating instead through backward trajectory analysis that such structures in the subtropical troposphere are primarily formed by the quasi-horizontal mixing of distinct tropical and subtropical air masses driven by the Hadley circulation.

Kuta Muramoto, Takatoshi Sakazaki2026-10-05
📄 earth science

Vertical Distribution and Geochemical Relationships of 137 Cs and Natural Radionuclides in Soils of the Gilan Mountain Region, Uzbekistan

This study investigates the vertical distribution and geochemical relationships of natural and anthropogenic radionuclides in the soil profiles of Uzbekistan's Gilan mountain region, revealing distinct depth-dependent patterns for cesium-137 and strong correlations between thorium-232 and potassium-40 that clarify migration processes and environmental controls in mountainous ecosystems.

Umidjon Haydarov, Ulugbek Tukhtaev, Dilshod Hakimov, Shakhboz Khasanov, Amrullo Muzafarov2026-10-05
📄 earth science

China's urban fringes are undergoing functional reorganization

By tracking functional transitions across 15 Chinese cities from 2012 to 2022 and projecting to 2035, this study reveals a dominant shift toward mixed-function states in urban fringes, highlighting the need for differentiated governance strategies that balance ecological protection with coordinated development to support sustainable urbanization and climate adaptation.

Hedong Wang, Liangen Zeng, Baoxi Pan, Bohan Zeng, Chengfeng He, Tianyu Zeng2026-10-05