首页|Long-term trends in water-soluble ions in aerosols at Urumqi Glacier No. 1: Evidence of increasing dust and alkalinity in Central Asia
Long-term trends in water-soluble ions in aerosols at Urumqi Glacier No. 1: Evidence of increasing dust and alkalinity in Central Asia
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NETL
NSTL
Elsevier
Long-term monitoring of atmospheric aerosols is essential for understanding the interaction between natural processes and anthropogenic activities. This study analyzes a 20-year (2002-2022) dataset of water-soluble ions (WSIs) in aerosols collected at Urumqi Glacier No. 1 (UG1) in the eastern Tianshan Mountains, China. Significant increases in calcium ions (Ca2+) and aerosol pH were observed, indicating enhanced dust deposition and a shift toward an alkaline atmospheric environment. Mann-Kendall trend analysis revealed a notable annual increase in Ca2+ concentration (0.053 mu g m(-3), p < 0.001), with Ca2+ contributing up to 73 % of the total ion content during dust-heavy periods (2013-2015 and 2020-2022). Backward trajectory analysis and ion balance calculations identified Central Asian deserts as primary dust sources, while other WSIs (e.g., SO42-, NO3-, NH4+) reflect contributions from anthropogenic emissions. These findings highlight the growing influence of transboundary dust transport and its implications for air quality, glacier dynamics, and environmental changes in high-altitude regions.
NETL
NSTL
Elsevier
