The role of ice in N 2 O 5 heterogeneous hydrolysis at high latitudes
Open accessPublished version of a preprint
Abstract
Abstract. We report evidence for ice catalyzing N2O5 heterogeneous hydrolysis from a study conducted near Fairbanks, AK in November 2007. Mixing ratios of N2O5, NO, NO2, and ozone are reported and are used to determine steady state N2O5 lifetimes. When air masses are sub-saturated with respect to ice, the data show longer lifetimes (≈20 min) and elevated N2O5 levels, while ice-saturated air masses show shorter lifetimes (≈6 min) and suppressed N2O5 levels. We also report estimates of aerosol surface area densities that are on the order of 50 μm2/cm3, a surface area density that is insufficient to explain the rapid losses of N2O5 observed in this study, reinforcing the importance of other reactive surfaces such as ice. Ice-saturated pollution plumes are ubiquitous in high latitudes; therefore, catalysis on these surfaces is largely responsible for nocturnal processing of N2O5 leading to nitric acid production and loss of NOx in high latitude plumes.
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As urban-polluted air transports away from the city and mixes with ozone-rich air, nocturnal nitrogen oxide chemistry becomes active, leading to deposition of nitric acid and particulate nitrate.
“As urban-polluted air transports away from the city and mixes with ozone-rich air, nocturnal nitrogen oxide chemistry becomes active (Apodaca et al., 2008; Huff et al., 2011) leading to deposition of nitric acid and particulate nitrate.”
From Local Arctic Air Pollution: A Neglected but Serious Problem (2018) · cites this paper as Apodaca et al., 2008
The Introduction (page not available) says nighttime NOₓ oxidation proceeds through NO₃ and N₂O₅, that the NO sink is often small outside a city at night, and that NOₓ is ultimately converted to nitric acid and deposited. Section 3 explains that ozone reacts with NO₂ to initiate this chemistry. The copy does not establish the specific mixing of transported urban air with ozone-rich air or deposition of particulate nitrate. (LLM, conf=0.84)
Experimental — accuracy not yet measuredHeterogeneous reactions can also occur on ice particles and at the snow surface, leading to deposition of N2O5.
“Heterogeneous reactions can also occur on ice particles and at the snow surface, leading to deposition of N2O5 (Apodaca et al., 2008; Huff et al., 2011).”
From Local Arctic Air Pollution: A Neglected but Serious Problem (2018) · cites this paper as Apodaca et al., 2008
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Research works printed but not linked: 8
- Andreas, E. L., Guest, P. S., Persson, P. O. G., Fairall, C. W., Horts, T. W., Moritz, R. E., and Semmer, S. R.: Near-surface water vapor over polar sea ice is always near ice saturation, J. Geophys. Res., 107, SHE 8-1, doi:10.1029/2000JC000411, 2002. 12611 · DOI
- Ayers, J. D. and Simpson, W. R.: Measurements of N 2 O 5 near Fairbanks, Alaska, J. Geophys. Res., 111, D14309, doi:10.1029/2006JD007070, 2006. 12598, 12604 · DOI
- Brown, S. S., Stark, H., and Ravishankara, A. R.: Applicability of the steady state approximation to the interpretation of atmospheric observations of NO 3 and N 2 O 5 , J. Geophys. Res., 108, 4539, doi:10.1029/2003JD003407, 2003. 12597, 12601 · DOI
- Finlayson-Pitts, B. J. and Pitts, Jr., J. N.: Chemistry of the Upper and Lower Atmosphere, Academic Press, 269 pp., San Diego, 2000. 12596
- Geyer, A. and Stutz, J.: Vertical profiles of NO 3 , N 2 O 5 , O 3 , and NO x in the nocturnal bound- ary layer: 2. Model studies on the altitude dependence of composition and chemistry, J. Geophys. Res., 109, D16, doi:10.1029/2003JD004211, 2004. 12597 · DOI
- Rosenfeld, D.: Suppression of Rain and Snow by Urban and Industrial Air Pollution, Science, 287, 1793-1796, doi:10.1126/science.287.5459.1793, 2000. 12607 · DOI
- Seinfeld, J. H. and Pandis, S. N.: Atmospheric Chemistry and Physics, John Wiley & Sons, New York, Chichester, Weinheim, 1998. 12610
- Witte, H. J.: Airborne observations of cloud particles and infrared flux density (8-14 µm) in the Arctic, Master's thesis, University of Washington, 102 pp., 1968. 12607
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Local Arctic Air Pollution: A Neglected but Serious Problem
Schmale, J., Arnold, S. R., Law, K. S., Thorp, T., Anenberg, S., Simpson, W. R., Mao, J., & Pratt, K. A. (2018) · Earth's Future · doi:10.1029/2018ef000952 · Cited by 219 · see citing works
“As urban-polluted air transports away from the city and mixes with ozone-rich air, nocturnal nitrogen oxide chemistry becomes active (Apodaca et al., 2008; Huff et al., 2011) leading to deposition of nitric acid and particulate nitrate.”
BackgroundInfluentialSelf-citation
- Authors
- Apodaca, R. L., Huff, D. M., & Simpson, W. R.
- Affiliations
- University of Alaska Fairbanks (US)
- Venue
- Atmospheric Chemistry and Physics
- Publisher
- Copernicus GmbH
- Published
- 2008-12-15
- Volume
- 8
- Issue
- 24
- Pages
- 7451-7463
- ISSN
- 1680-7316 (ISSN-L)
- 1680-7324
- OpenAlex
- W2098450968
- Cited by
- 28
- References
- 0
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 1 · 2023: 2 · 2022: 1 · 2021: 5 · 2019: 1 · 2018: 2 · 2017: 1 · 2016: 1 · 2015: 2 · 2014: 3 · 2012: 3
- FWCI
- 0.84
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Atmospheric chemistry and physics (publishedVersion, cc-by)
- Funders
- National Science Foundation (0624448)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric chemistry and aerosols
- Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric aerosols and clouds
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric Ozone and Climate
- Keywords
- nitric acid production, ice saturation, snowpack, Fairbanks, Alaska, NO2, ozone
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