2.5. Simulation experiments using climate change parameter within ASPIM The climate scenarios are simulated covered the range of predicted changes for south west Australia. The climate change parameter of temperatures are modelled by +2 and 4 degree higher in both maximum and minimum temperatures. The parameters for rainfall -15% and -30% rainfall. For every scenarios, they are simulated 40 different years. Daily weather records for each scenario were created by modifying the historic weather data of the last 40 years (1975–2014). The first part of the result is that the climate change will affect the weather in each month evenly. In the second part, climate change only occur from May to October which is the growing season of wheats. Although