4.6 Article

Extremely low-volatility organic coating leads to underestimation of black carbon climate impact

期刊

ONE EARTH
卷 6, 期 2, 页码 158-166

出版社

CELL PRESS
DOI: 10.1016/j.oneear.2023.01.009

关键词

-

向作者/读者索取更多资源

Black carbon aerosols have a significant impact on climate systems, and estimating their radiative effect requires understanding their mixing state and light absorption enhancement from coatings. Observations have shown lower light absorption enhancement factors (Eabs) than expected, leading to a debate on the true magnitude of BC's climate impact. However, considering the presence of extremely low-volatility (eLV) organics in BC coatings, the estimates of Eabs increase substantially. Our results highlight a strong radiative warming effect from atmospheric BC.
Black carbon (BC) aerosols play an important role in climate systems. Estimating BC's radiative effect requires knowledge of its mixing state and light absorption enhancement resulting from coatings by other materials. Observational studies have reported much lower light absorption enhancement factors (Eabs) than expected from laboratory studies and model estimates. This has led to an intensive debate on the true magnitude of BC's climate impact. We find that the observed, apparently small Eabs cannot reflect the overall effect of BC coatings, as it does not include the persisting absorption enhancement by extremely low-volatility (eLV) organics that remain on the BC particles after passing through thermodenuders. Our observations show that eLV organics are extensively present in BC coatings, with a mass fraction of-5%-100%. Accounting for these eLV coatings, the observation estimates of Eabs increase substantially to up to 1.8-2.0. Our results highlight a strong radiative warming effect from atmospheric BC.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据