Multiday production of condensing organic aerosol mass in urban and forest outflow
Abstract
Secondary organic aerosol (SOA) production in air masses containing either anthropogenic or biogenic (terpene-dominated) emissions is investigated using the explicit gas-phase chemical mechanism generator GECKO-A. Simulations show several-fold increases in SOA mass continuing for multiple days in the urban outflow, even as the initial air parcel is diluted into the regional atmosphere. The SOA mass increase in the forest outflow is more modest (~50%) and of shorter duration (1–2 days). The multiday production in the urban outflow stems from continuing oxidation of gas-phase precursors which persist in equilibrium with the particle phase, and can be attributed to multigenerational reaction products of both aromatics and alkanes, especially those with relatively low carbon numbers (C4–15). In particular we find large contributions from substituted maleic anhydrides and multi-substituted peroxide-bicyclic alkenes. The results show that the predicted production is a robust feature of our model even under changing atmospheric conditions and different vapor pressure schemes, and contradict the notion that SOA undergoes little mass production beyond a short initial formation period. Here, the results imply that anthropogenic aerosol precursors could influence the chemical and radiative characteristics of the atmosphere over an extremely wide region, and that SOA measurements near precursor sources may routinely underestimatemore »
- Authors:
- Publication Date:
- Research Org.:
- National Center for Atmospheric Research (NCAR), Boulder, CO (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1197838
- Alternate Identifier(s):
- OSTI ID: 1441388
- Grant/Contract Number:
- SC0006780
- Resource Type:
- Published Article
- Journal Name:
- Atmospheric Chemistry and Physics (Online)
- Additional Journal Information:
- Journal Name: Atmospheric Chemistry and Physics (Online) Journal Volume: 15 Journal Issue: 2; Journal ID: ISSN 1680-7324
- Publisher:
- Copernicus Publications, EGU
- Country of Publication:
- Germany
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES
Citation Formats
Lee-Taylor, J., Hodzic, A., Madronich, S., Aumont, B., Camredon, M., and Valorso, R. Multiday production of condensing organic aerosol mass in urban and forest outflow. Germany: N. p., 2015.
Web. doi:10.5194/acp-15-595-2015.
Lee-Taylor, J., Hodzic, A., Madronich, S., Aumont, B., Camredon, M., & Valorso, R. Multiday production of condensing organic aerosol mass in urban and forest outflow. Germany. https://doi.org/10.5194/acp-15-595-2015
Lee-Taylor, J., Hodzic, A., Madronich, S., Aumont, B., Camredon, M., and Valorso, R. Fri .
"Multiday production of condensing organic aerosol mass in urban and forest outflow". Germany. https://doi.org/10.5194/acp-15-595-2015.
@article{osti_1197838,
title = {Multiday production of condensing organic aerosol mass in urban and forest outflow},
author = {Lee-Taylor, J. and Hodzic, A. and Madronich, S. and Aumont, B. and Camredon, M. and Valorso, R.},
abstractNote = {Secondary organic aerosol (SOA) production in air masses containing either anthropogenic or biogenic (terpene-dominated) emissions is investigated using the explicit gas-phase chemical mechanism generator GECKO-A. Simulations show several-fold increases in SOA mass continuing for multiple days in the urban outflow, even as the initial air parcel is diluted into the regional atmosphere. The SOA mass increase in the forest outflow is more modest (~50%) and of shorter duration (1–2 days). The multiday production in the urban outflow stems from continuing oxidation of gas-phase precursors which persist in equilibrium with the particle phase, and can be attributed to multigenerational reaction products of both aromatics and alkanes, especially those with relatively low carbon numbers (C4–15). In particular we find large contributions from substituted maleic anhydrides and multi-substituted peroxide-bicyclic alkenes. The results show that the predicted production is a robust feature of our model even under changing atmospheric conditions and different vapor pressure schemes, and contradict the notion that SOA undergoes little mass production beyond a short initial formation period. Here, the results imply that anthropogenic aerosol precursors could influence the chemical and radiative characteristics of the atmosphere over an extremely wide region, and that SOA measurements near precursor sources may routinely underestimate this influence.},
doi = {10.5194/acp-15-595-2015},
journal = {Atmospheric Chemistry and Physics (Online)},
number = 2,
volume = 15,
place = {Germany},
year = {Fri Jan 16 00:00:00 EST 2015},
month = {Fri Jan 16 00:00:00 EST 2015}
}
https://doi.org/10.5194/acp-15-595-2015
Web of Science
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