2022
DOI: 10.5194/acp-22-13739-2022
|View full text |Cite
|
Sign up to set email alerts
|

Potential underestimation of ambient brown carbon absorption based on the methanol extraction method and its impacts on source analysis

Abstract: Abstract. The methanol extraction method was widely applied to isolate organic carbon (OC) from ambient aerosols, followed by measurements of brown carbon (BrC) absorption. However, undissolved OC fractions will lead to underestimated BrC absorption. In this work, water, methanol (MeOH), MeOH / dichloromethane (MeOH / DCM, 1:1, v/v), MeOH / DCM (1:2, v/v), tetrahydrofuran (THF), and N,N-dimethylformamide (DMF) were tested for extraction efficiencies of ambient OC, and the light absorption of individual solvent… Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1

Citation Types

3
6
0

Year Published

2023
2023
2024
2024

Publication Types

Select...
5

Relationship

1
4

Authors

Journals

citations
Cited by 5 publications
(12 citation statements)
references
References 84 publications
3
6
0
Order By: Relevance
“…In our previous studies where the speciation data of 12 hr integrated samples were analyzed, biomass burning showed similar contributions to Abs 365,w (31.6%) and Abs 365,m (48.0%) as in this work, while a significant fraction of carbonaceous aerosols and solvent extract absorption (>20%) were apportioned to the dust resuspension factor characterized by the highest loading of Ca 2+ (M. Xie et al, 2022b;Z. Xu et al, 2022).…”
Section: Source Apportionmentsupporting
confidence: 80%
See 4 more Smart Citations
“…In our previous studies where the speciation data of 12 hr integrated samples were analyzed, biomass burning showed similar contributions to Abs 365,w (31.6%) and Abs 365,m (48.0%) as in this work, while a significant fraction of carbonaceous aerosols and solvent extract absorption (>20%) were apportioned to the dust resuspension factor characterized by the highest loading of Ca 2+ (M. Xie et al, 2022b;Z. Xu et al, 2022).…”
Section: Source Apportionmentsupporting
confidence: 80%
“…The misclassification of BrC sources based on low time‐resolved measurements is likely caused by the missing of diurnal source cycles. The coal combustion, microbial activity, and lubricating oil combustion factors were identified and well explained at the same study location and were not major sources of BrC (Gou et al., 2021; M. Xie et al., 2022b; Z. Xu et al., 2022). The stacked factor contributions of the PMF total and PMF summer solutions reasonably reflected the diurnal patterns of input species (Figure 5 and Figure S9 in Supporting Information ), but the peak values were usually underestimated.…”
Section: Resultsmentioning
confidence: 86%
See 3 more Smart Citations