Publications (24) View all
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Book: Integrated observations and modelling of greenhouse gas budgets at the ecosystem level in The Netherlands
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ABSTRACT: Within the framework of the Bsik research program Climate Changes Spatial Planning (CCSP), research has been carried out to improve estimates of greenhouse gas (GHG) emissions (GHG) from land-use and land management in space and time, to reduce the uncertainty in such GHG emission estimates, to identify measures to reduce GHG emissions from land-use and to apply and further develop innovative methods to measure the emissions of N2O and CH4 in particular. CO2 emissions show a quite regular and predictable seasonal and daily variability mainly related to light and temperature. Temporal variability of N2O emission is characterized by low background emissions interspersed with rather rare but extremely high emission peaks mainly triggered by precipitation and application of fertilizer. Temporal variability of CH4 emission is very large as well, but the causes of this variability are less clear. Spatial variability of N2O and CH4 emissions is to some extent caused by differences in groundwater level and land and soil management intensity. The objective to upscale flux estimates from the landscape level to country-wide level was achieved for CO2 and N2O but not for CH4. In particular improvement of water table information is important for upscaling of CH4 fluxes, while all models will profit from updated information on the rapidly changing peat soils in the Netherlands. We have found that the rewetting of agricultural peatland can turn areas from a GHG source into a sink. Summer emissions from large shallow lakes are higher than those from intensively and extensively managed polders but lower than those from drainage ditches within the polders. The current innovative measurement methods (EC, REA and DEC) for N2O and CH4 fluxes are accurate but not yet economically efficient. For CO2 there are accurate and economically efficient methods in place.Report number KvR 055/12 03/2012; National Research Programme Climate changes Spatial Planning (KvR)., ISBN: 978-90-8815-049-4 -
Article: Variabiliteit in ruimte en tijd ontrafeld
Landschap 06/2010; 2. -
Article: Leaf properties, photosynthetic rates and growth strategies of ramin
Ramin technical report. -
Article: Converging estimates of the forest carbon sink; a comparison of the carbon sink of Scots pine forest in The Netherlands as presented by the eddy covariance and the forest inventory method
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ABSTRACT: The aim of this study was to compare estimates of the net ecosystem exchange (NEE) by two different methods for a small pine forest in the Netherlands. The inventory-based carbon budgeting method estimated the average NEE for 1997-2001 at 202 g C per mr per year, with a confidence interval of 138-271 g C per mr per year. The estimate obtained by the eddy covariance method was 295 g C per mr per year on average for the same period, with a confidence interval of 224-366 g C per mr per year. Uncertainties in both methods are assessed, and recommendations are given for future research.Wageningen, Alterra, 2002. Alterra-rapport 631, 44 pp. -
Article: Development of sustainable carbon conserving management strategies for far eastern Siberian larch ecosystem on permafrost
