3 box model

I have extended my 2 box model to 3 boxes:

http://spreadsheets.google.com/ccc?key=0Als9xXZMCAXsdENKbUc1UnVtaVluNXJEYjNMNlZvd0E&hl=en


There is not much change in deep ocean temperature (about 0.05K from 1880 to now). However, it changes another 0.05K in just ten more years if forcing stays at the last (2003) value provided by GISS.