Effects of Land-Use Change on Carbon Stocks in Switzerland |
| |
Authors: | Janine Bolliger Frank Hagedorn Jens Leifeld Jürgen Böhl Stephan Zimmermann Reto Soliva Felix Kienast |
| |
Institution: | 1. Swiss Federal Research Institute WSL, Zücherstrasse 111, 8903, Birmensdorf, Switzerland 2. Research Station Agroscope Reckenholz-T?nikon ART, Reckenholzstrasse 191, 8046, Zurich, Switzerland
|
| |
Abstract: | We assessed how consequences of future land-use change may affect size and spatial shifts of C stocks under three potential
trends in policy—(a) business-as-usual: continuation of land-use trends observed during the past 15 years; (b) extensification:
full extensification of open-land; and (c) liberalization: full reforestation potential. The build-up times for the three
scenarios are estimated at 30, 80 and 100 years, respectively. Potential C-stock change rates are derived from the literature.
Whereas the business-as-usual scenario would cause marginal changes of 0.5%, liberalization would provoke a 13% increase in
C stocks (+62 MtC). Gains of 24% would be expected for forests (+95 MtC), whereas open-land C stock would decrease 27% (−33 MtC).
Extensification would lead to a C stock decrease of 3% (−12 MtC). Whereas forest C is expected to increase 12% (+36.5 MtC)
at high elevations, stocks of open-land C would decline 38.5% (−48.5 MtC). Most affected are unfavorable grasslands, which
increase in area (+59%) but contribute only 14.5% to the C stocks. C sinks would amount to 0.6 MtC y−1 assuming a build-up time of 100 years for the liberalization scenario. C stocks on the current forest area are increasing
by 1 MtC y−1. The maximal total C sink of 1.6 MtC might thus suffice to compensate for agricultural greenhouse gases (2004: 1.4 Mt CO2–C equivalents), but corresponds only to 11–13% of the anthropogenic greenhouse gas emission in Switzerland. Thus, even the
largest of the expected terrestrial C stocks under liberalization will be small in comparison with current emissions of anthropogenic
greenhouse gases. |
| |
Keywords: | agroecosystem change agricultural decline C stock land-use change forest C open-land C soil C scenario-based modeling |
本文献已被 SpringerLink 等数据库收录! |
|