NDLI: Are Swedish forest soils sinks or sources for CO2—model analyses based on forest inventory data

Content Provider	Springer Nature Link
Author	Ågren, Göran I. Hyvönen, Riitta Nilsson, Torbjörn
Copyright Year	2007
Abstract	Forests soils should be neither sinks nor sources of carbon in a long-term perspective. From a Swedish perspective the time since the last glaciation has probably not been long enough to reach a steady state, although changes are currently very slow. In a shorter perspective, climatic and management changes over the past 100 years have probably created imbalances between litter input to soils and organic carbon mineralisation. Using extant data on forest inventories, we applied models to analyse possible changes in the carbon stocks of Swedish forest soils. The models use tree stocks to provide estimates of tree litter production, which are fed to models of litter decomposition and from which carbon stocks are calculated. National soil carbon stocks were estimated to have increased by 3 Tg yr−1 or 12–13 g m−2 yr−1 in the period 1926–2000 and this increase will continue because soil stocks are far from equilibrium with current litter inputs. The figure obtained is likely to be an underestimation because wet sites store more carbon than predicted here and the inhibitory effect of nitrogen deposition on soil carbon mineralisation was neglected. Knowledge about site history prior to the calculation period determines the accuracy of current soil carbon stocks estimates, although changes can be more accurately estimated.
Starting Page	139
Ending Page	149
Page Count	11
File Format	PDF
ISSN	01682563
Journal	Biogeochemistry
Volume Number	89
Issue Number	1
e-ISSN	1573515X
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-08-15
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Carbon balance Carbon modelling Forest soils Life Sciences Environmental Chemistry Ecosystems Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Earth-Surface Processes Environmental Chemistry Water Science and Technology

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