 |
| Titel |
Effect of N-deposition on long term soil acidification simulations of forest ecosystems in Germany |
| VerfasserIn |
S. Wochele, K. Butterbach-Bahl, H. D. Nagel, A. Schlutow, M. Jenssen, A. Marx, R. Kiese |
| Konferenz |
EGU General Assembly 2009
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250027622
|
|
|
|
|
|
| Zusammenfassung |
| Acidification of forest soils has been a big issue in the mid 70s of the last century due to an
immense output of sulphur by the industry and of course also by nitrogen, leading to forest
decline and a shift in biodiversity. The deposition peaked during the 1980s and a number of
conventions (e.g. Gothenburg Protocol) have been signed, agreeing to reduce industrial
emissions.
Today, the sulphate deposition has been reduced significantly due to the use of filter systems
by the industry, whereas nitrogen depositions (NH4, NO3) are still on a high level (ca. 40 kg
N ha-1 yr-1).
In this study, a soil acidification submodule based on SAFE (Soil Acidification of
Forest Ecosystems) has been implemented into the Modular Biosphere Simulation
Environment (MoBilE). MoBilE is a model framework already capable to simulate N
and C turnover in forest ecosystems and associated nutrient losses e.g. N leaching
and trace gas emissions (CO2, N2O, NO, N2, CH4). The aim of the study is to
investigate the impact of elevated atmospheric N deposition on forest acidification and
eutrophication.
This will be done retrospectively for the years 1920-2000 and by application of
future deposition and climate scenarios (A1B, B1) for the years 2000-2030, the
latter especially with respect to the evaluation of the recovery potential of forest
ecosystems.
Long term soil acidification simulation results of German Level II sites are shown as well as
model sensitivity studies. Furthermore, first results of the linkage between MoBiLE, the
BERN model and a stochastic ecosystem type model to address N-deposition effects on
biodiversity will be demonstrated. |
|
|
|
|
|
|