Temperature effect on phase state and reactivity controls atmospheric multiphase chemistry and transport of PAHs
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F18%3A00101685" target="_blank" >RIV/00216224:14310/18:00101685 - isvavai.cz</a>
Result on the web
<a href="https://www.ncbi.nlm.nih.gov/pubmed/29750188" target="_blank" >https://www.ncbi.nlm.nih.gov/pubmed/29750188</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1126/sciadv.aap7314" target="_blank" >10.1126/sciadv.aap7314</a>
Alternative languages
Result language
angličtina
Original language name
Temperature effect on phase state and reactivity controls atmospheric multiphase chemistry and transport of PAHs
Original language description
Polycyclic aromatic hydrocarbons like benzo(a)pyrene (BaP) in atmospheric particulate matter pose a threat to human health because of their high carcinogenicity. In the atmosphere, BaP is mainly degraded through a multi-phase reaction with ozone, but the fate and atmospheric transport of BaP are poorly characterized. Earlier modeling studies used reaction rate coefficients determined in laboratory experiments at room temperature, which may overestimate/underestimate degradation rates when applied under atmospheric conditions. Moreover, the effects of diffusion on the particle bulk are not well constrained, leading to large discrepancies between model results and observations. We show how regional and global distributions and transport of BaP can be explained by a new kinetic scheme that provides a realistic description of the temperature and humidity dependence of phase state, diffusivity, and reactivity of BaP-containing particles. Low temperature and humidity can substantially increase the lifetime of BaP and enhance its atmospheric dispersion through both the planetary boundary layer and the free troposphere. The new scheme greatly improves the performance of multiscale models, leading to better agreement with observed BaP concentrations in both source regions and remote regions (Arctic), which cannot be achieved by less-elaborate degradation schemes (deviations by multiple orders of magnitude). Our results highlight the importance of considering temperature and humidity effects on both the phase state of aerosol particles and the chemical reactivity of particulate air pollutants.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10700 - Other natural sciences
Result continuities
Project
<a href="/en/project/GA16-11537S" target="_blank" >GA16-11537S: Transformation products of mono- and polyaromatic hydrocarbons in atmospheric aerosols – priority hazardous pollutants</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Science advances
ISSN
2375-2548
e-ISSN
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Volume of the periodical
4
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
1-8
UT code for WoS article
000431373300014
EID of the result in the Scopus database
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