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Schulte-Bisping, H.* ; Brumme, R.* ; Priesack, E.

Nitrous oxide emission inventory of German forest soils.

J. Geophys. Res. 108, 1-9 (2003)
DOI
[1] Annual fluxes of N2O trace gas emissions were assessed after stratifying German forest soils into Seasonal Emission Pattern (SEP) and Background Emission Pattern (BEP). Broad-leaved forests with soil pH(KCl) ≤ 3.3 were assigned to have SEP, broad-leaved forests with soil pH(KCl) > 3.3 and all needle-leaved forests to have BEP. BEPs were estimated by a relationship between annual N2O emissions and carbon content of the O-horizon. SEPs were primarily controlled by temperature and moisture and simulated by the model Expert-N after calibration to a 9-year record of N2O measurements. Analysis with different climate and soil properties indicated that the model reacts highly sensitive to changes in soil temperature, soil moisture, and soil texture. A geographic information system (ARC/INFO) was used for a spatial resolution of 1 km × 1 km grid where land cover, dominant soil units, and hygro climate classes were combined. The mean annual N2O emission flux from German forest soils was estimated as 0.32 kg ha−1 yr−1. Broad-leaved forests with SEP had the highest emissions (2.05 kg ha−1 yr−1) followed by mixed forests (0.38 kg ha−1 yr−1), broad-leaved forests (0.37 kg ha−1 yr−1), and needle-leaved forests with BEP (0.17 kg ha−1 yr−1). The annual N2O emission from German forest soils was calculated as 3.26 Gg N2O-N yr−1. Although needle-leaved trees cover about 57% of the entire forest area in Germany, their contribution is low (0.96 Gg N2O-N yr−1). Broad-leaved forests cover about 22% of the forest area but have 55% higher emissions (1.49 Gg N2O-N yr−1) than needle-leaved. Mixed forests cover 21% of the area and contribute 0.81 Gg N2O-N yr−1. Compared to the total N2O emissions in Germany of 170 Gg N yr−1, forest soils contribute only 1.9%. However, there are some uncertainties in this emission inventory, which are intensely discussed.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
ISSN (print) / ISBN 0022-1406
e-ISSN 2156-2202
Journal Journal of Geophysical Research JGR
Quellenangaben Volume: 108, Issue: D4, Pages: 1-9 Article Number: , Supplement: ,
Publisher Wiley
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Soil Ecology (IBOE)