Monday, September 21, 2009

Pilegaard et al. 2006

Pilegaard K, Skiba U, Ambus P, Beier C, Bruggemann N, Butterbach-Bahl, Dick J, Dorsey J, Duyzer J, Gallagher M, Gasche R, Horvath L, Kitzler B, Leip A, Pihlatie MK, Rosenkranz P, Seufert G, Vesala T, Westrate H, Zechmeister-Boltenstern S. 2006. Factors controlling regional differences in forest soil emission of nitrogen oxides (NO and N2O). Biogeosciences 3: 651-661.

These (abundant) authors present an analysis of a large combined dataset covering NO and N2O emissions from a range of forest systems in Europe. The measurements contributing to this large dataset were continuous measures (at least daily, usually hourly or better) and run at least one year. This provides a high-quality dataset that includes variation induced by seasonality.

One of the most interesting findings in this study is a scale-dependent relationship between soil parameters and N2O emissions. Within-forests, soil temperature and moisture were highly predictive of N2O flux, but not at scales encompassing multiple forests in comparison. At larger spatial scales, stand age and C/N ratio were much better predictors.

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