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| Titel |
Eddy Covariance trial measurement of carbon dioxide and fine particle emission during a controlled Savannah fire |
| VerfasserIn |
G. Fratini, A. Forgione, P. Ciccioli, D. Papale, R. Valentini |
| 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 |
250023918
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| Zusammenfassung |
| During the CarboAfrica Fire Experiment (CA-FE) held in August 2007 at the Kruger
National Park (South Africa), the concurrent determination of carbon dioxide, water vapor
and size segregated particle (0.32 – 6.24 μm nominal optical diameter) fluxes was performed
by Eddy Covariance. The instrumentation (EOLO) recently developed by Fratini et al. (2007)
for the determination of particle fluxes from desert storm events in Northern China,
was used for a real-time determination of carbon particle fluxes. Although data
were collected in three different plots, only in one of them the data set was long
enough to follow the evolution of chemical species during the different phases in
which fire develops. Results from other plots were used to corroborate the analysis.
Emission fluxes of CO2 as high as 4.*103 μmol/m2s were reached during the
flaming phase, whereas values ranging between 20 and 60 μmol/m2s were recorded
during the smoldering phase. The temporal evolution of particle fluxes only partly
correlated with those of CO2 with values ranging from ca. 3-4*103 particles/m2s in
the flaming phase down to few tens of particles/m2s during the smoldering phase.
While fluxes of carbon particles in the size range investigated dropped down quickly
after the flaming phase, probably due to gravitational settling, CO2 fluxes reached
an almost steady state, likely to last for several hours after the end of the flaming
phase.
References
Fratini G., Ciccioli P., Febo A., Forgione A., Valentini R. (2007) Size-segregated fluxes of
mineral dust from a desert area of northern China by Eddy Covariance. Atmos. Chem. Phys.,
7, 2839-2854 |
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