TY - JOUR
T1 - The vital role of sulfuric acid in iodine oxoacids nucleation
T2 - impacts of urban pollutants on marine atmosphere
AU - Zu, Haotian
AU - Zhang, Shaobing
AU - Liu, Ling
AU - Zhang, Xiuhui
N1 - Publisher Copyright:
© 2024 The Author(s). Published by IOP Publishing Ltd
PY - 2024/1/1
Y1 - 2024/1/1
N2 - The nucleation of iodic acid (HIO3) and iodous acid (HIO2) play a significant role in marine new particle formation (NPF) events. However, the inability to explain intensive NPF bursts in polluted coasts indicates the participation of potential precursors. Herein, we identified a novel nucleation mechanism of HIO3-HIO2 system enhanced by the urban pollutant sulfuric acid (H2SO4). We found that H2SO4 could largely enhance the cluster formation rates (J, cm−3 s−1) of HIO3-HIO2 system, especially in high [H2SO4] regions near H2SO4 emission sources. The enhanced J of HIO3-HIO2-H2SO4 system performs better match than that of HIO3-HIO2 system with the observational rates of polluted coasts and polar regions, such as Zhejiang and Marambio. Moreover, the H2SO4-involved cluster formation is realized without Gibbs free energy barrier and dominate broadly in marine regions with rich H2SO4 and scarce iodine concentrations. These findings may help to explain some missing fluxes of marine new particles and emphasize the impact of urban components on marine nucleation processes.
AB - The nucleation of iodic acid (HIO3) and iodous acid (HIO2) play a significant role in marine new particle formation (NPF) events. However, the inability to explain intensive NPF bursts in polluted coasts indicates the participation of potential precursors. Herein, we identified a novel nucleation mechanism of HIO3-HIO2 system enhanced by the urban pollutant sulfuric acid (H2SO4). We found that H2SO4 could largely enhance the cluster formation rates (J, cm−3 s−1) of HIO3-HIO2 system, especially in high [H2SO4] regions near H2SO4 emission sources. The enhanced J of HIO3-HIO2-H2SO4 system performs better match than that of HIO3-HIO2 system with the observational rates of polluted coasts and polar regions, such as Zhejiang and Marambio. Moreover, the H2SO4-involved cluster formation is realized without Gibbs free energy barrier and dominate broadly in marine regions with rich H2SO4 and scarce iodine concentrations. These findings may help to explain some missing fluxes of marine new particles and emphasize the impact of urban components on marine nucleation processes.
KW - air pollutant sulfuric acid
KW - iodine oxoacids nucleation
KW - marine atmospheric aerosols
KW - new particle formation
UR - http://www.scopus.com/inward/record.url?scp=85182380498&partnerID=8YFLogxK
U2 - 10.1088/1748-9326/ad193f
DO - 10.1088/1748-9326/ad193f
M3 - Article
AN - SCOPUS:85182380498
SN - 1748-9326
VL - 19
JO - Environmental Research Letters
JF - Environmental Research Letters
IS - 1
M1 - 014076
ER -
