Gee one pot, I didn't know they measured the sea temperature in 1900. How did they get those figures?
Did you see why the mean temperature has increased, because USA is the main area where the weather is recorded, and most of the weather stations there have been approached by concrete and other urban structures thus increasing the temperature readings
Have a watch of these and come back and talk to me. 100 years is not long enough to measure any "Climate change"
Part 1 http://www.youtube.com/watch?v=FOLkze-9GcI
Part 2 http://www.youtube.com/watch?v=vN06JSi-SW8&feature=related
Part 3 http://www.youtube.com/watch?v=iCXDISLXTaY&feature=related
Part 4 http://www.youtube.com/watch?v=bpQQGFZHSno&feature=related