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| Titel |
Inventories of N2O and NO emissions from European forest soils |
| VerfasserIn |
M. Kesik, P. Ambus, R. Baritz, N. Brüggemann, K. Butterbach-Bahl, M. Damm, J. Duyzer, L. Horvath, R. Kiese, B. Kitzler, A. Leip, C. Li, M. Pihlatie, K. Pilegaard, S. Seufert, D. Simpson, U. Skiba, G. Smiatek, T. Vesala, S. Zechmeister-Boltenstern |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 2, no. 4 ; Nr. 2, no. 4 (2005-12-05), S.353-375 |
| Datensatznummer |
250000636
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| Publikation (Nr.) |
 copernicus.org/bg-2-353-2005.pdf |
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| Zusammenfassung |
Forest soils are a significant source for the primary and secondary
greenhouse gases N2O and NO. However, current estimates are still
uncertain due to the still limited number of field measurements and the
herein observed pronounced variability of N trace gas fluxes in space and
time, which are due to the variation of environmental factors such as soil
and vegetation properties or meteorological conditions. To overcome these
problems we further developed a process-oriented model, the PnET-N-DNDC
model, which simulates the N trace gas exchange on the basis of the
processes involved in production, consumption and emission of N trace gases.
This model was validated against field observations of N trace gas fluxes
from 19 sites obtained within the EU project NOFRETETE, and shown to perform
well for N2O (r2=0.68, slope=0.76) and NO (r2=0.78,
slope=0.73). For the calculation of a European-wide emission inventory we
linked the model to a detailed, regionally and temporally resolved database,
comprising climatic properties (daily resolution), and soil parameters, and
information on forest areas and types for the years 1990, 1995 and 2000. Our
calculations show that N trace gas fluxes from forest soils may vary
substantial from year to year and that distinct regional patterns can be
observed. Our central estimate of NO emissions from forest soils in the EU
amounts to 98.4, 84.9 and 99.2 kt N yr−1, using meteorology from 1990,
1995 and year 2000, respectively. This is <1.0% of pyrogenic NOx
emissions. For N2O emissions the central estimates were 86.8, 77.6 and
81.6 kt N yr−1, respectively, which is approx. 14.5% of the source
strength coming from agricultural soils. An extensive sensitivity analysis
was conducted which showed a range in emissions from 44.4 to 254.0 kt N yr−1
for NO and 50.7 to 96.9 kt N yr−1 for N2O, for year 2000
meteorology.
The results show that process-oriented models coupled to a GIS are useful
tools for the calculation of regional, national, or global inventories of
biogenic N trace gas emissions from soils. This work represents the most
comprehensive effort to date to simulate NO and N2O emissions from
European forest soils. |
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