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| Titel |
Long-term Observations of Carbonaceous Aerosols (including C isotope) at Alert: Inferring Emission Sources of Black Carbon Transported to the Arctic |
| VerfasserIn |
Lin Huang, Sangeeta Sharma, Wendy Zhang, Jeff Brook, Richard Leaitch, Kebin He, Fengkui Duan, Fumo Yang |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250102260
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| Publikation (Nr.) |
 EGU/EGU2015-1569.pdf |
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| Zusammenfassung |
| Black carbon is a major component of carbonaceous aerosols and formed by incomplete
combustion of fossil fuels and biomass burning (including biofuels and open fires). It plays
unique roles in Earth’s climate system through both direct and indirect effects.
Identifying and attributing its emission sources, tracking source changes with time
and relating them to radiative forcing are important for understanding the impacts
of BC on climate at the global and regional levels, as well as necessary for the
strategies targeted to reduce BC emission. However, there are many challenges and
uncertainties regarding those aspects, particularly for BC aerosols transported to the Arctic
region.
To address the concerns of BC in the Arctic, carbonaceous aerosol observations,
including elemental carbon (EC) content as BC mass, C isotopes as a source tracer, and light
absorption coefficient as BC’s optical property, have been conducted at Alert, a WMO GAW
station (82Ë 27’N, 62Ë 31’W) since the early 2000s. In this presentation, nearly a decade of
measurements will be presented, with a focus on the isotope results in EC (corresponding
data from Beijing will also be shown for the purpose of comparison). Seasonal and
inter-annual variations in δ13C (EC) have been characterized, inferring emission sources and
suggesting source changes over last 5-6 years. Based on the C isotope results, the
possible emission sources of BC contributed to the Arctic will be also discussed. |
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