Evidence for brown carbon absorption over the Bay of Bengal during the southwest monsoon season: a possible oceanic source

Environmental Science. Processes & Impacts
Poonam BikkinaS Kuswanth Kumar

Abstract

The near UV-visible light-absorbing organic carbon (OC) of ambient aerosols, referred to here as brown carbon (BrC), significantly influences the atmospheric radiative forcing on both regional and global scales. Here, we documented BrC absorption in the aqueous and methanol extracts of marine aerosols collected over the Bay of Bengal (BoB: September-October 2017) and a city, Visakhapatnam (May-June 2018), in southern India during the southwest monsoon (i.e., a transition period with weak continental impact). The absorption spectra of BrC over the BoB showed several peaks around 300-400 nm and differ from those observed over Visakhapatnam. The absorption coefficient of BrC over the BoB, unlike Visakhapatnam data, does not seem to covary with other chemical proxies of biomass burning (non-sea-salt or nss-K+) and coal combustion (nss-SO42-) in the continental outflows, suggesting a different source of BrC over the BoB. Besides, we observed higher proportions of water-insoluble organic carbon (WIOC/OC: 0.89 ± 0.02) and significant enrichment of Mg2+ over Na+ (i.e., relative to seawater) in BoB aerosols. This result and the backward air mass trajectories both hinted their major source of OC from marine-derived organic matter. In con...Continue Reading

References

Oct 8, 2004·Nature·Colin D O'DowdJean-Philippe Putaud
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
Oct 10, 2012·Proceedings of the National Academy of Sciences of the United States of America·Ranjit BahadurV Ramanathan
May 7, 2014·Environmental Science & Technology·Jenny RisslerErik Swietlicki
Aug 8, 2014·Environmental Science & Technology·Hyun Ji Julie LeeSergey A Nizkorodov
Feb 27, 2015·Chemical Reviews·Alexander LaskinSergey A Nizkorodov
Aug 4, 2015·Environmental Science & Technology·P M ShamjadM H Bergin
Nov 2, 2016·Environmental Science & Technology·Peng LinAlexander Laskin
Nov 2, 2016·Environmental Science & Technology·Thilina JayarathneElizabeth A Stone
Mar 8, 2017·Scientific Reports·Caiqing YanÖrjan Gustafsson
Mar 12, 2017·The Science of the Total Environment·Chong-Shu ZhuAnthony D A Hansen
May 19, 2017·Environmental Science & Technology·Rangu SatishNeeraj Rastogi
Jan 1, 2018·The Science of the Total Environment·Chong-Shu ZhuNing-Ning Zhang
Mar 2, 2018·Environmental Science & Technology·Benjamin J SumlinRajan K Chakrabarty
May 2, 2018·The Science of the Total Environment·Juping YanZhiyuan Cong
Feb 16, 2020·The Science of the Total Environment·Archita RanaSayantan Sarkar

❮ Previous
Next ❯

Software Mentioned

HYSPLIT
MAE

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.