Of course the sea level is either rising or falling at any given time, but I don't think this has much to do with carbon dioxide, although that is a theory. Roy Spencer's temperature monitoring says : "The linear warming trend since January, 1979 still stands at +0.13 C/decade (+0.11 C/decade over the global-averaged oceans, and +0.18 C/decade over global-averaged land)." That's a pretty steady rate that we humans can handle. After all, the sea level has risen about 420 feet since the last glacial maximum. Better that the earth is warming than cooling!