ateam - Potsdam Institute for Climate Impact Research

ATEAM final report Section 5 and 6 (2001-2004) 116
summer runoff [mm]
600
500
400
300
800
700
600
500
200
400
1000
Alptal Hirschbichl Dischma
100
300
900
1 2 3 4 1 2 3 4 1 2 3 4
800
700
600
500
400
300
Saltina:
1 2 3 4
1000
900
800
700
600
500
Verzasca:
1 2 3 4
Time slices
1400
1300
1200
1100
Time slices
1: 1960 – 1990
2: 1990 – 2020
3: 2020 – 2050
4: 2050 - 2080
Figure 27. Summer river discharge (May to October) averaged over the three decades of the four time
slices of ATEAM. The thick line gives the average summer river discharge of the seven different
scenarios. The yellow area shows the maximum and minimum of the seven scenarios.
200
Alptal
200
Hirschbichl
Discharge [mm]
100
0
1 2 3 4 5 6 7 8 9 10 11 12
month
100
0
1 2 3 4 5 6 7 8 9 10 11 12
month
current
future
Figure 28. Stream flow regimes for the Alptal and the Hirschbichl catchment under current conditions
and under future conditions (time slice 2050 – 2080, A2 HadCM3).
elevation [m]
2000
1600
1200
1970 2000 2030 2060
year
2000
1600
1200
1970 2000 2030 2060
year
A1FI
A2
B1
B2
A2 CGCM2
A2 CSIRO2
A2 PCM2
Figure 29. Elevation of snow line (elevation above which the snow cover is reliable) as projected for
seven future climate scenarios. The left chart shows the Alptal catchment, the right chart shows the
Verzacsa-Lavertezzo catchment.