6 months ago
Last edited at 4:05AM on 9/20/2013
Because everything around you are moving in cycles. Something like climate which is affected by so many factors is like a spider web of cycles. Looking at past will help us determine exactly where we are now at which cycle so we can predict the future. Of course the system is so complicated it never works perfectly so the predictions are never as precise as we wish, but we get better with time. The cycles I'm talking about is first of all astronomic cycles like the Earth's rotation cycles, the activity of the Sun; then there is the ice age cycle(world gets hot and cold in a cycle), water level has a certain cycle which affects the climate greatly, some chemicals at the atmosphere and oceans are going through cycles of level fluctuations which affects the climate more or less. Of course Earth as a seismic activity cycle too it gets higher and lower in periods. You see you can add so much more in detail. That is why it is such a huge task to fulfill.
A better understating of past and present climates helps us predict the future climates by what we have been seeing. Past climates are also an indication that such a climate will appear again. It is therefore important to prepare ourselves for such particular climate or a similar one.