ateam - Potsdam Institute for Climate Impact Research
ateam - Potsdam Institute for Climate Impact Research
ateam - Potsdam Institute for Climate Impact Research
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ATEAM final report Section 5 and 6 (2001-2004) 22<br />
Table 6. Ecosystem models used in ATEAM to model changes in ecosystem services, listed per sector.<br />
Sector Model Reference<br />
Agriculture<br />
Land use change scenario (Rounsevell et al. 2004 submitted)<br />
SUNDIAL (Smith et al. 1996)<br />
ROTHC<br />
(Coleman and Jenkinson 1996, Coleman et<br />
al. 1997)<br />
IMAGE (biofuel demand) (IMAGE team 2001)<br />
Forestry GOTILWA+ (Sabaté et al. 2002)<br />
EFISCEN (Nabuurs et al. 2000, Karjalainen et al. 2002)<br />
Carbon storage LPJ (biogeochemistry) (Sitch et al. 2003, fire dynamics: Thonicke et<br />
al. 2001)<br />
Water Mac-pdm (Arnell 1999, Arnell 2003)<br />
Biodiversity and Nature statistical niche modelling (Araújo et al. 2002, Thuiller 2003)<br />
Conservation<br />
Mountains RHESsys (mountains) (Band et al., 1993, Tague and Band 2001,<br />
Tague and Band, 2004)<br />
6.2.2.1 Agriculture<br />
The agricultural sector relies on ecosystem services such as food and fiber production, soil fertility<br />
maintenance, and biomass energy production. Global changes in Europe will impact these services, as<br />
indicated by potential impacts on a number of ecosystem service indicators that were identified together<br />
with stakeholders from the agricultural sector (see Table 1). During the 21 st Century, agriculture will be<br />
radically altered. <strong>Climate</strong> change will mean that many areas become too hot or too dry to support<br />
agriculture. Changing world economies, and likely changes in the Common Agricultural Policy and the<br />
subsidies currently paid to farmers and land managers, will also mean that less land will be used <strong>for</strong><br />
agriculture in the future (see also section Land use change scenarios). The impact of climate differs<br />
between different future climate scenarios and the impact of land use change also differs between<br />
future land management scenarios.<br />
Soil organic carbon<br />
Principal investigators: Pete Smith, Jo Smith & Martin Wattenbach in collaboration with ATEAM climate<br />
group, Sönke Zaehle and JRC-Ispra (Bob Jones, Roland Heiderer, Luca Montanerella)<br />
It was our aim to examine how global changes would impact upon soil organic matter, important <strong>for</strong><br />
maintaining soil fertility and important <strong>for</strong> locking up carbon that would otherwise be lost to the<br />
atmosphere as carbon dioxide (see Table 1). To examine the impact on soil organic matter (expressed<br />
in terms of soil carbon) we looked at changes in cropland and grassland soil carbon during the 20 th and<br />
21 st Centuries using the Rothamsted Soil Carbon (RothC) model <strong>for</strong> the ATEAM grid (<strong>for</strong> A1f, A2, B1,<br />
B2 scenarios with HadCM3, and three additional GCMs 19 <strong>for</strong> the A2 scenario). We also used the best<br />
available soils data (European Soils Database), as well as outputs on potential evaopotranspiration<br />
(PET, water loss from the soil and the plant), and net primary production (NPP, plant growth) from the<br />
LPJ model 20 . We used a land use change reconstruction <strong>for</strong> the 20 th Century and the future land use<br />
scenarios that are consistent with the climate scenarios (see above) from the ATEAM land use group.<br />
The model was used to examine the effects of climate only, climate including the effects on plant<br />
growth, and the combined effects of climate and land use change.<br />
Looking at climate impacts alone, the decrease in soil carbon is significant <strong>for</strong> all scenarios but is most<br />
pronounced in the A1f scenario and least pronounced in the B1 scenario (Figure 8). Differences<br />
19 GCM = general circulation models, coupled atmosphere/ocean-models to estimate climate change. resulting from<br />
greenhouse gas emissions<br />
20 The LPJ (Lund-<strong>Potsdam</strong>-Jena) Dynamic Global Vegetation Model. A model that uses input on climate, land use, soil and<br />
atmosphere to calculate vegetation growth.