berretta, I don't know many people who have such discomfiture with not having certainty about the future.
Yes, it is probable that the sea level will rise in a series of spurts, with the first large-ish rise possibly happening in the latter decades this century (maybe one or two metres in a decade). It is also possible a sudden rise will happen sooner than that. There will also continue to be smoother rises, most likely accelerating but more steady (as opposed to a sudden rise in a short space of time).
As huge chunks of glaciers and ice sheets fall into the ocean, as is more likely than a nice even gradual melt, the sea will rise suddenly.
The temperature is certainly going to continue to rise. That will continue until the emissions we add to the atmosphere balance the emissions being absorbed by land and ocean. I cannot see that happening till much later this century at the earliest. And it depends on how quickly we replace fossil fuels with renewable sources, which could be in 40 years or 80 years. If the temperature rises above an added 2C there will be many more disruptions to societies. It is likely that we cannot now avoid a 3C rise in global temperature - and that will be very difficult to live with.
If you want certainty about the timing of changes then you are living in the wrong reality.
If you want certainty about how much more fossil fuel we will burn over what period of time, then you are also living in the wrong reality.
Most business people welcome any knowledge they can get to help make informed longer term decisions and do some contingency planning.
