Si Lanping, Li Zongxing
Observation and Research Station of Eco-Hydrology and National Park by Stable Isotope Tracing in Alpine region/Gansu Qilian Mountains Ecology Research Center/Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Observation and Research Station of Eco-Hydrology and National Park by Stable Isotope Tracing in Alpine region/Gansu Qilian Mountains Ecology Research Center/Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China.
Sci Total Environ. 2024 May 20;926:171830. doi: 10.1016/j.scitotenv.2024.171830. Epub 2024 Mar 19.
In order to investigate the spatiotemporal distribution and influencing factors of global precipitation chemistry, we conducted a comprehensive analysis using multiple data sources, revealing the impact of human activities on the natural environment. The results indicate a decreasing trend in global precipitation acidity over the past 20 years. The distribution of global precipitation is influenced by both natural and anthropogenic factors. Alkaline cation concentrations are higher in desert and arid regions, while high concentrations of SO and NO are primarily found in industrial areas, and agricultural areas exhibit higher NH concentrations. Coastal regions have higher Na and Cl concentrations compared to inland areas. However, the increased Na + and Cl concentrations due to inland salinization should not be overlooked. Additionally, influenced by atmospheric circulation, transboundary pollution from South Asia leads to higher SO and NO concentrations in precipitation over the Tibetan Plateau. Meteorological factors have a weaker influence on precipitation chemistry compared to geographical and human activity factors, although ion concentrations in snowfall are higher than in rainfall.
