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| Titel |
Boreal fire emissions in transported pollution plumes measured at the GEOSummit Station, Greenland |
| VerfasserIn |
Louisa Kramer, Detlev Helmig, John Burkhart, Andreas Stohl |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250073331
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| Zusammenfassung |
| Source contributions of O3 precursors e.g. NOx (NOx = NO + NO2) to the Arctic are strongly governed by anthropogenic and boreal fire emissions and their transport pathways. Uncertainties remain in the magnitude and the impact of photochemical O3 production from boreal fire plume air masses in the Arctic. Results from previous studies have varied, with both O3 production and O3 destruction observed in transported boreal biomass burning plumes.
Here, measurements of total reactive nitrogen oxides (NOy), peroxyacetyl nitrate (PAN), NOx, O3 and non-methane hydrocarbons (NMHC) and FLEXPART simulations over a 2-year period from 2008 to 2010 are used to identify polluted air masses transported to the GEOSummit station (72.6N, 38.5W, 3200 m.a.s.l.) and assess the impact of boreal fire emissions on O3 levels in the Arctic lower free troposphere. During the measurement period a number of events were observed when O3 increased above background levels, coinciding with elevated levels of nitrogen oxides. FLEXPART carbon monoxide (CO) tracer simulations indicate that these events occur when polluted air masses arrive at the measurement site. Our results indicate that O3 is transported to the GEOSummit Station within biomass burning plumes. The high PAN and NOy levels during these events suggest that further O3 production may occur during transport downwind. |
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