Monitoring SO₂ Gas Dry Deposition in Vietnam: Trends and Insights


The dry deposition of sulfur dioxide (SO₂) has significant environmental implications, impacting air quality, soil, water systems, and human health. A recent study published in IgMin Research investigates SO₂ dry deposition trends in Vietnam from 2019 to 2023, highlighting geographical and seasonal variations.

Key Findings

  1. Northern vs. Southern Vietnam: The research reveals that SO₂ dry deposition is more variable in Northern Vietnam, influenced heavily by meteorological conditions and seasonal changes. Southern regions display more stable but lower deposition levels.
  2. Seasonal Trends: Higher SO₂ concentrations and deposition rates are observed during the summer and autumn months (April to August), attributed to increased temperatures and reduced humidity.
  3. Yearly Variations:
    • 2019: Lowest SO₂ dry deposition (9.18 kg/ha/year nationally).
    • 2021: Highest SO₂ dry deposition (12.98 kg/ha/year nationally).
    • Notably, Hanoi recorded the highest deposition rates from 2019–2022, while Hoa Binh peaked in 2023 with 2.45 kg/ha/year.
  4. Influencing Factors: Variables such as wind speed, humidity, temperature, and solar radiation significantly affect deposition rates, alongside geographical characteristics.

Environmental Implications

The study underscores the role of SO₂ emissions in acid deposition, which affects ecosystems and public health by lowering soil pH, damaging crops, and polluting water bodies. Monitoring these trends is essential for formulating effective environmental policies to mitigate impacts.

Looking Ahead

The analysis indicates a steady increase in SO₂ dry deposition from 1999 to 2023, with sharp growth until 2021 and a slight decrease in 2022. Predictions suggest a continued upward trend in the future, necessitating proactive measures to control emissions.


DOI:
https://dx.doi.org/10.61927/igmin240

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