The sea ice around the north pole has again broken records but the warning signs coming out of Iceland are showing a large melt taking place of land ice in the glaciers of iceland with some measuring around 900 meters thick and losing 1 metre per year. Global warming is starting to kick in and unless drastic measures are taken it will happen faster than anticipated due to the exponential curve ratio in relation to heating verses melting ratios.
If the current calculation for these glaciers to melt completely will increase the ocean levels by 7 metres and at current rates will happen within 100 years then expect it faster as we have seen these type of calculations before and it ended up being much faster.
Ratios are variable when it comes to exponential melt.
For instance 1 degree equals say 1 year so if it then addes to say a 2 degree variation then that 2 degree increase by 1 degree becomes a 3 degree variations which supplies a 1.5 degree increase and so it goes. The 3 degrees becomes 4.5 degrees and so forth.
Current rates are speculative at best! As ratios change according to the curve.
There are any number of factors that have to be taken into account pollution increases in output from countries where they say they will reduce by 20% but the curve ratio is 35% so in actuality there is a further increase of 5% above the current level estimate in the 10 year period, you have to understand that increases are taking place due to the consistent use of fossil fuels and the burning of coal and fuel oil and emissions of other gases. Carbon trading only moves the problem about it does not stop it!
As the Methane is released due to melting of tundra etc we also see a further increase as well as releases of further carbon storage areas so the pattern keeps getting worse all it takes is for folks to run the numbers.
So unless serious thought and construction of sea defences is started asap it will happen faster than current predictions portray and cities will go under with no time for contruction of defences. Some urgent forward thinking is required.