Role of Iodine-Assisted Aerosol Particle Formation in Antarctica
(2023) In Environmental Science and Technology- Abstract
New particle formation via the ion-mediated sulfuric acid and ammonia molecular clustering mechanism remains the most widely observed and experimentally verified pathway. Recent laboratory and molecular level observations indicate iodine-driven nucleation as a potentially important source of new particles, especially in coastal areas. In this study, we assess the role of iodine species in particle formation using the best available molecular thermochemistry data and coupled to a detailed 1-d column model which is run along air mass trajectories over the Southern Ocean and the coast of Antarctica. In the air masses traversing the open ocean, ion-mediated SA-NH3 clustering appears insufficient to explain the observed particle... (More)
New particle formation via the ion-mediated sulfuric acid and ammonia molecular clustering mechanism remains the most widely observed and experimentally verified pathway. Recent laboratory and molecular level observations indicate iodine-driven nucleation as a potentially important source of new particles, especially in coastal areas. In this study, we assess the role of iodine species in particle formation using the best available molecular thermochemistry data and coupled to a detailed 1-d column model which is run along air mass trajectories over the Southern Ocean and the coast of Antarctica. In the air masses traversing the open ocean, ion-mediated SA-NH3 clustering appears insufficient to explain the observed particle size distribution, wherein the simulated Aitken mode is lacking. Including the iodine-assisted particle formation improves the modeled Aitken mode representation with an increase in the number of freshly formed particles. This implies that more particles survive and grow to Aitken mode sizes via condensation of gaseous precursors and heterogeneous reactions. Under certain meteorological conditions, iodine-assisted particle formation can increase cloud condensation nuclei concentrations by 20%-100%.
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- author
- Xavier, Carlton LU ; De Jonge, Robin Wollesen LU ; Jokinen, Tuija ; Beck, Lisa ; Sipilä, Mikko ; Olenius, Tinja and Roldin, Pontus LU
- organization
- publishing date
- 2023
- type
- Contribution to journal
- publication status
- epub
- subject
- keywords
- iodic acid, modeling, new particle formation, secondary aerosols, Southern Ocean
- in
- Environmental Science and Technology
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:38626432
- scopus:85190743784
- ISSN
- 0013-936X
- DOI
- 10.1021/acs.est.3c09103
- language
- English
- LU publication?
- yes
- id
- 1d6eb276-79f5-4b9f-bd5d-3a5738aff665
- date added to LUP
- 2024-04-29 15:00:35
- date last changed
- 2024-05-13 16:18:37
@article{1d6eb276-79f5-4b9f-bd5d-3a5738aff665,
abstract = {{<p>New particle formation via the ion-mediated sulfuric acid and ammonia molecular clustering mechanism remains the most widely observed and experimentally verified pathway. Recent laboratory and molecular level observations indicate iodine-driven nucleation as a potentially important source of new particles, especially in coastal areas. In this study, we assess the role of iodine species in particle formation using the best available molecular thermochemistry data and coupled to a detailed 1-d column model which is run along air mass trajectories over the Southern Ocean and the coast of Antarctica. In the air masses traversing the open ocean, ion-mediated SA-NH<sub>3</sub> clustering appears insufficient to explain the observed particle size distribution, wherein the simulated Aitken mode is lacking. Including the iodine-assisted particle formation improves the modeled Aitken mode representation with an increase in the number of freshly formed particles. This implies that more particles survive and grow to Aitken mode sizes via condensation of gaseous precursors and heterogeneous reactions. Under certain meteorological conditions, iodine-assisted particle formation can increase cloud condensation nuclei concentrations by 20%-100%.</p>}},
author = {{Xavier, Carlton and De Jonge, Robin Wollesen and Jokinen, Tuija and Beck, Lisa and Sipilä, Mikko and Olenius, Tinja and Roldin, Pontus}},
issn = {{0013-936X}},
keywords = {{iodic acid; modeling; new particle formation; secondary aerosols; Southern Ocean}},
language = {{eng}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Environmental Science and Technology}},
title = {{Role of Iodine-Assisted Aerosol Particle Formation in Antarctica}},
url = {{http://dx.doi.org/10.1021/acs.est.3c09103}},
doi = {{10.1021/acs.est.3c09103}},
year = {{2023}},
}