Brown and black carbon in Beijing aerosol: Implications for the effects of brown coating on light absorption by black carbon

The Science of the Total Environment
Yuan ChengShu-Ping Dong

Abstract

Brown carbon (BrC) is increasingly included in climate models as an emerging category of particulate organic compounds that can absorb solar radiation efficiently at specific wavelengths. Water-soluble organic carbon (WSOC) has been commonly used as a surrogate for BrC; however, it only represents a limited fraction of total organic carbon (OC) mass, which could be as low as about 20% in urban atmosphere. Using methanol as the extraction solvent, up to approximately 90% of the OC in Beijing aerosol was isolated and measured for absorption spectra over the ultraviolet-to-visible wavelength range. Compared to methanol-soluble OC (MSOC), WSOC underestimated BrC absorption by about 50% at 365nm. The mass absorption efficiencies measured for BrC in Beijing aerosol were converted to the imaginary refractive indices of BrC and subsequently used to compute BrC coating-induced enhancement of light absorption (Eabs) by black carbon. Eabsattributed to lensing was reduced in the case of BrC coating relative to that caused by purely-scattering coating. However, this reduction was overwhelmed by the effect of BrC shell absorption, indicating that the overall effect of BrC coating was an increase in Eabs. Methanol extraction significantly red...Continue Reading

References

Mar 7, 2002·Environmental Science & Technology·Jian Zhen YuHong Yang
Aug 9, 2008·Science·Duncan T L AlexanderJames R Anderson
Jul 4, 2012·Proceedings of the National Academy of Sciences of the United States of America·Chul E ChungDamien Decremer
Aug 29, 2012·Proceedings of the National Academy of Sciences of the United States of America·Daniel A LackJoshua P Schwarz
May 25, 2013·Environmental Science & Technology·Andrew T LambePaul Davidovits
Aug 8, 2014·Environmental Science & Technology·Hyun Ji Julie LeeSergey A Nizkorodov
Oct 25, 2014·Environmental Science & Technology·Sajeev PhilipDouglas J Macdonald
Feb 27, 2015·Chemical Reviews·Alexander LaskinSergey A Nizkorodov
Aug 4, 2015·Environmental Science & Technology·P M ShamjadM H Bergin
Oct 1, 2015·Nature Communications·Shang LiuAndré S H Prévôt
Oct 28, 2015·Environmental Science & Technology·Peng LinAlexander Laskin

❮ Previous
Next ❯

Citations

Jan 16, 2020·Environmental Science and Pollution Research International·Pengfei ChenTao Pu
Aug 10, 2019·Environmental Science and Pollution Research International·Eva MericoDaniele Contini
Jul 27, 2017·Environmental Science and Pollution Research International·YanGe ZhangQi Zhang
Oct 14, 2020·The Science of the Total Environment·Xiaorong ZhangBing Chen
Oct 13, 2020·The Science of the Total Environment·Yunfei WuRenjian Zhang
Apr 14, 2020·Environmental Pollution·Lu ChenZhanqing Li
Feb 28, 2021·Journal of Environmental Sciences (China)·Wenyu ZhangMaofa Ge
Feb 22, 2021·Environmental Pollution·Shantanu Kumar PaniYing I Tsai
May 2, 2018·The Science of the Total Environment·Zhe BaiBing Chen
Nov 9, 2021·Environmental Science and Pollution Research International·Farzana RunaAbdus Salam

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.