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| Titel |
Continuous measurements of perfluorocarbons at remote monitoring stations in Japan |
| VerfasserIn |
T. Saito, Y. Yokouchi, S. Taguchi, H. Mukai |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250025507
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| Zusammenfassung |
| Perfluorocarbons (PFCs) are very powerful and long-lived greenhouse gases and their
emissions are regulated under the Kyoto Protocol. Emission of PFCs may have increased in
East Asia as a result of recent industrialization, but little is known about the emission
strength. In order to find the importance of their regional sources, continuous measurements
of C2-C4 PFCs along with some other VOCs have been performed with fully-automated
preconcentration/gas chromatograph/mass spectrometer at two remote monitoring stations in
Japan; at Hateruma island (24.1Ë N, 123.8Ë E) since 2004, and at Cape Ochiishi (43.1Ë N,
145.3Ë E) since 2006. The measurements showed that baseline concentrations of PFCs in
2008 were 3.9 ppt for PFC-116 (C2F6), 0.5 ppt for PFC-218 (C3F8), and 1.3 ppt for
PFC-318 (C4F8). Enhanced concentrations above the baseline were occasionally
observed over hours to days in air masses which had passed over urban areas in
East Asia, suggesting great anthropogenic emission there. The measurements were
used to determine the magnitude and distribution of the surface sources of PFCs
in East Asia using a tagged simulation from three-dimensional transport model. |
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