Hydrological variables simulated for three future time periods:

• ?with emission scenario A1FI and four climate models:
  

The WSFS model system uses daily precipitation and temperature as input. Values of present day precipitation and temperature are calculated from observed daily values from 1961- 1990. For the climate change scenarios these observed precipitation and temperature values are perturbed according to the delta-change method. This means that the predicted temperature change (oC) is added to the present temperature and the present precipitation is corrected with the predicted change (%) in precipitation. Potential evaporation is calculated from temperature, precipitation and season with an empirical equation calibrated to observed evaporation. Evapotranspiration is calculated from potential evaporation taking into account soil moisture.

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The output of the WSFS hydrological model system are the variables:

lumi	Average maximum snow water equivalent (mm) - average of the 30 year periods yearly maximum snow water equivalents (maximum from the years daily snow water equivalent values)
spfl	Timing of maximum runoff, spring (%) - average portion of the maximum runoffs that occur during spring
sufl	Timing of maximum runoff, summer (%) - average portion of the maximum runoffs that occur during summer
aufl	Timing of maximum runoff, autumn (%) - average portion of the maximum runoffs that occur during autumn
wifl	Timing of maximum runoff, winter (%) - average portion of the maximum runoffs that occur during winter
qrmx	Average maximum runoff (mm) - average of the 30 year periods yearly maximum runoff (maximum from daily values)
qrxx	Average runoff yearly sum (mm) - average of the 30 year periods yearly runoff sum
qrsp	Average runoff sum spring (mm) - average of the 30 year periods spring (March-May) runoff sum
qrsu	Average runoff sum summer (mm) - average of the 30 year periods summer (June-August) runoff sum
qrau	Average runoff sum autumn (mm) - average of the 30 year periods spring (September-November) runoff sum
qrwi	Average runoff sum winter (mm) - average of the 30 year periods spring (Decenber-February) runoff sum
amvx	Average maximum soil moisture deficit (mm) - average of the 30 year periods yearly maximum soil moisture deficit (maximum from daily values)
haxx	Average yearly land evaporation sum (mm) - average of the 30 year periods yearly sum of evaporation from land surface
snco	Number of days with snow cover - average number of days in one year with at least 50 % of area covered in snow in the 30 year period

References
/1/ Vehvil?inen, B. & Huttunen, M. 2002. The Finnish watershed simulation and forecasting system (WSFS). Publication of the 21st conference of Danube countries on the hydro-logical forecasting and hydrological bases of water management. http://www.ymparisto.fi/download.asp?contentid=9539&lan=FI