Impacts of Chemical Degradation on the Global Budget of Atmospheric Levoglucosan and Its Use As a Biomass Burning Tracer,Environmental Science & Technology

当前位置： X-MOL 学术 › Environ. Sci. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Impacts of Chemical Degradation on the Global Budget of Atmospheric Levoglucosan and Its Use As a Biomass Burning Tracer
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2021-03-23 , DOI: 10.1021/acs.est.0c07313
Yumin Li _{1,

2} , Tzung-May Fu _{1,

3} , Jian Zhen Yu _{2,

4} , Xu Feng _{1,

5} , Lijuan Zhang _{1,

5} , Jing Chen _{6,

7} , Suresh Kumar Reddy Boreddy _{6,

8} , Kimitaka Kawamura _{6,

9} , Pingqing Fu ₁₀ , Xin Yang _{1,

3} , Lei Zhu _{1,

3} , Zhenzhong Zeng _{1,

3}

Affiliation

School of Environmental Sciences and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong Province 518055, China
Division of Environment and Sustainability, Hong Kong University of Science and Technology, Hong Kong, 999077, China
Shenzhen Institute of Sustainable Development, Southern University of Science and Technology, Shenzhen, Guangdong Province 518055, China
Department of Chemistry, Hong Kong University of Science and Technology, Hong Kong, 999077, China
Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, China
Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan
School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
Space Physics Laboratory, Vikram Sarabhai Space Centre, Indian Space Research Organization, Thiruvananthapuram, 695022, India
Chubu Institute for Advanced Studies, Chubu University, Kasugai 487-8501, Japan
School of Earth System Science, Tianjin University, Tianjin, 300072, China

Levoglucosan has been widely used to quantitatively assess biomass burning’s contribution to ambient aerosols, but previous such assessments have not accounted for levoglucosan’s degradation in the atmosphere. We develop the first global simulation of atmospheric levoglucosan, explicitly accounting for its chemical degradation, to evaluate the impacts on levoglucosan’s use in quantitative aerosol source apportionment. Levoglucosan is emitted into the atmosphere from the burning of plant matter in open fires (1.7 Tg yr^–1) and as biofuels (2.1 Tg yr^–1). Sinks of atmospheric levoglucosan include aqueous-phase oxidation (2.9 Tg yr^–1), heterogeneous oxidation (0.16 Tg yr^–1), gas-phase oxidation (1.4 × 10^–4 Tg yr^–1), and dry and wet deposition (0.27 and 0.43 Tg yr ^–1). The global atmospheric burden of levoglucosan is 19 Gg with a lifetime of 1.8 days. Observations show a sharp decline in levoglucosan’s concentrations and its relative abundance to organic carbon aerosol (OC) and particulate K⁺ from near-source to remote sites. We show that such features can only be reproduced when levoglucosan’s chemical degradation is included in the model. Using model results, we develop statistical parametrizations to account for the atmospheric degradation in levoglucosan measurements, improving their use for quantitative aerosol source apportionment.

中文翻译：

化学降解对大气左旋葡聚糖全球预算的影响及其作为生物质燃烧示踪剂的用途

左旋葡聚糖已被广泛用于定量评估生物质燃烧对环境气溶胶的贡献，但以前的此类评估并未考虑左旋葡聚糖在大气中的降解。我们开发了第一个大气左旋葡聚糖的全球模拟，明确考虑了其化学降解，以评估对左旋葡聚糖在定量气溶胶源分配中的使用的影响。在明火（1.7 Tg yr ^-1）和生物燃料（2.1 Tg yr ^-1）燃烧植物物质的过程中，左葡聚糖会排放到大气中。大气左旋葡聚糖的沉陷包括水相氧化（2.9 Tg yr ^–1），非均相氧化（0.16 Tg yr ^–1），气相氧化（1.4×10 ^–4 Tg yr）^–1），干法和湿法沉积（0.27和0.43 Tg yr ^–1）。左旋葡聚糖的全球大气负荷为19 Gg，寿命为1.8天。观测表明，左旋葡聚糖的浓度及其从有机源到偏远地区对有机碳气溶胶（OC）和颗粒K ^+的相对丰度急剧下降。我们表明，只有当模型中包含左旋葡聚糖的化学降解作用时，才能复制此类特征。利用模型结果，我们开发了统计参数化方法，以解决左旋葡聚糖测量中的大气降解，从而改善了其在定量气溶胶源分配中的使用。

更新日期：2021-04-20

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南