Thank you for your reply. I think that the climate is the result of combination of chaotic random factors and predictable factors which follow laws of physics. As many data indicate, the temperature has increased globally in the last one hundred years. Although this is merely a trend, it is very unlikely that the temperature next year would drop down to the level of temperature one hundred years ago. This is predictable because the temperature must obey the laws of energy. The size of polar ice is pretty much dependent on the temperature in the polar region. Therefore the size of polar ice is one of good indicators of global warming. On the contrary, the number and strength of hurricanes are dependent on many factors including both chaotic random factors and predictable factors. When the sea temperature is higher, there are more chances for hurricanes to become stronger. This is predictable because hurricanes are getting energy from heat energy retained in the sea. However, it is unpredictable how, when, and where hurricanes are formed because this belongs to the realm determined by chaotic factors. There might be some patterns in the relationship between hurricane formation and other climatologic phenomenon. But I think that these patterns are only temporary at their best.