Preprints
https://doi.org/10.5194/egusphere-2022-838
https://doi.org/10.5194/egusphere-2022-838
 
01 Sep 2022
01 Sep 2022
Status: this preprint is open for discussion.

Chemical characterization of organic compounds involved in iodine-initiated new particle formation from coastal macro-algal emission

Yibei Wan1, Xiangpeng Huang2, Chong Xing1, Qiongqiong Wang1, Xinlei Ge2, and Huan Yu1 Yibei Wan et al.
  • 1School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China
  • 2Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China

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 the coastal I-NPF. Here we present an important complementary study to the ongoing laboratory and field researches of iodine nucleation in 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.

Yibei Wan et al.

Status: open (until 13 Oct 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2022-838', Juan Carlos Gomez Martin, 02 Sep 2022 reply
  • RC1: 'Comment on egusphere-2022-838', Anonymous Referee #1, 26 Sep 2022 reply

Yibei Wan et al.

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Short summary
The organic compounds involved in continental new particle formation have been investigated in depth in last two decades. In contrast, no prior work has studied the exact chemical composition of organic compounds and their role in the coastal new particle formation. We present an important complementary study to the ongoing laboratory and field researches of iodine nucleation in coastal atmosphere. This study provided a more complete story of coastal I-NPF from low-tide macroalgal emission.