Chemical characterization of organic compounds involved in iodine-initiated new particle formation from coastal macroalgal emission
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Published:2022-12-06
Issue:23
Volume:22
Page:15413-15423
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ISSN:1680-7324
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Container-title:Atmospheric Chemistry and Physics
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language:en
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Short-container-title:Atmos. Chem. Phys.
Author:
Wan Yibei, Huang Xiangpeng, Xing ChongORCID, Wang QiongqiongORCID, Ge XinleiORCID, Yu HuanORCID
Abstract
Abstract. Iodine-initiated new particle formation (I-NPF) has long been recognized in
coastal hotspot regions. However, no prior work has studied the exact
chemical composition of organic compounds and their role in coastal
I-NPF. Here we present an important complementary study to the ongoing
laboratory and field research on iodine nucleation in the coastal atmosphere.
Oxidation and NPF experiments with vapor emissions from real-world coastal
macroalgae were simulated in a bag reactor. On the basis of comprehensive
mass spectrometry measurements, we reported for the first time a variety of
volatile precursors and their oxidation products in gas and particle phases
in such a highly complex system. Organic compounds overwhelmingly dominated
over iodine in the new particle growth initiated by iodine species. The
identity and transformation mechanisms of organic compounds were proposed in
this study to provide a more complete story of coastal NPF from low-tide
macroalgal emission.
Publisher
Copernicus GmbH
Subject
Atmospheric Science
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