When the dice are loaded, get the lead out.
The climate dice are loaded because the oceans have accumulated over 90% of the heat attributed to climate change.
In order to unload this situation you have to try to halt further accumulation and do something about the heat you already have.
Even if you stop adding heat to the oceans however, by getting CO2 emissions under control, the seas are going to continue to rise for centuries due to the thermal inertia of the ocean.
Irrespective of atmospheric CO2 concentrations there are a number of things that can be done about sea level rise:
- Convert some of the heat that is causing thermal expansion to electrical energy in a heat engine, which is another definition of ocean thermal energy conversions or OTEC.
- Move surface ocean heat to a depth of 1000 meters where the coefficient of expansion of salt water is half that of the tropical surface due to the increase in pressure and cold temperature at depth (as OTEC does).
- Convert part of the ocean’s liquid volume to its gaseous components, hydrogen and oxygen and then recombine these on land to produce water and energy (as is required to move offshore power generated by OTEC to shore).
- Limit the movement of tropical heat towards the poles, where it causes icecap melting, by converting this tropical heat to mechanical energy and moving it to the deep where the coefficient of expansion is lower (as OTEC does),
- Desalinate ocean water (as you can do with the OTEC's open cycle or by using the power it creates) and sequester that water in the only terrestrial spaces big enough to accept the amount of water that would make a difference to sea level rise and which are by definition in need of such volumes; the world’s hot deserts.
- Capture melt water and precipitation before it can reenter the oceans to swell their volume, and
- Recharge aquifers that have contributed about a third of the measured sea level rise to date with water from areas of the planet where it is in excess.
From late 2010 and to early 2011, sea levels actually declined 5mm due to massive rainfall, mainly in Australia.
In each of the two subsequent years however it has increased by 10 mm, which is triple the 1993 to 2010 average of 3.18mm per year, as the prior deluge ran back into the oceans.
If instead as much as possible had been returned to depleted aquifers, sea level rise would have benefited two ways; first by negating the need for further aquifer pumping and second by reversing the rise attributed to the same.
The upshot of the first four approaches to the most significant threat posed by climate change is you can produce at least as much energy as we are currently deriving from the fossil fuels that are creating the problem and probably again as much.