Scholarlink

<p>This paper provides an initial assessment of Myanmar’s PM<sub>0.1</sub> (small to nanoparticulate matter) levels. In Mandalay, the second-largest city in Myanmar, there are two distinct seasons: wet and dry. In 2019, a Nano-sampler with PM<sub>10/2.5/1.0/0.5/0.1</sub> stages was used to collect ambient particles. The first was from March, and the second was from December, both in 2019. The PM<sub>2.5</sub> and PM<sub>10</sub> levels exceeded the World Health Organization Air Quality Guidelines in both periods. The PM<sub>0.1</sub> level ranged from 10 to 23&#xa0;µg/m<sup>3</sup>, with an average of 15.21 ± 4.85&#xa0;µg/m<sup>3</sup>. The Char-EC/Soot-EC ratios in PM<sub>0.1</sub> (0.79–1.57) indicate a mixed combustion regime, with a slight dominance of biomass burning. However, values close to unity suggest substantial contributions from fossil fuel combustion, particularly diesel emissions, reflecting a dual-regime aerosol system in the study area. On the other hand, local and transboundary biomass burning emissions affect both fine particles (PM<sub>0.5−1.0</sub> and PM<sub>1.0−2.5</sub>) and coarse particles (PM<sub>&gt; 10</sub> and PM<sub>2.5−10</sub>). In December, emissions from the area may be more important than smoke from biomass burning in other parts of Myanmar. However, long-range transport from South Asia and the west side of Mandalay is important for elevated PM levels during March. This outcome will help Myanmar and other developing nations affected by burning tropical biomass transition to long-term air quality management.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A dual-regime aerosol system in urban Myanmar: local diesel emissions dominate ultrafine particles (PM0.1), while regional biomass burning controls larger particle mass

  • 期刊论文

  • 发表日期：

    2026年5月11日

查看全文
  • Worradorn Phairuang,
  • April Nway Nway Htet,
  • Chaw Su Su Hmwe,
  • Zaw Htet Myint,
  • Mai Kai Suan Tial,
  • Phakphum Paluang,
  • Masami Furuuchi

摘要

This paper provides an initial assessment of Myanmar’s PM0.1 (small to nanoparticulate matter) levels. In Mandalay, the second-largest city in Myanmar, there are two distinct seasons: wet and dry. In 2019, a Nano-sampler with PM10/2.5/1.0/0.5/0.1 stages was used to collect ambient particles. The first was from March, and the second was from December, both in 2019. The PM2.5 and PM10 levels exceeded the World Health Organization Air Quality Guidelines in both periods. The PM0.1 level ranged from 10 to 23 µg/m3, with an average of 15.21 ± 4.85 µg/m3. The Char-EC/Soot-EC ratios in PM0.1 (0.79–1.57) indicate a mixed combustion regime, with a slight dominance of biomass burning. However, values close to unity suggest substantial contributions from fossil fuel combustion, particularly diesel emissions, reflecting a dual-regime aerosol system in the study area. On the other hand, local and transboundary biomass burning emissions affect both fine particles (PM0.5−1.0 and PM1.0−2.5) and coarse particles (PM> 10 and PM2.5−10). In December, emissions from the area may be more important than smoke from biomass burning in other parts of Myanmar. However, long-range transport from South Asia and the west side of Mandalay is important for elevated PM levels during March. This outcome will help Myanmar and other developing nations affected by burning tropical biomass transition to long-term air quality management.