Climate unknowns include the rate of sea level rise, ozone loss, how the Gulf Stream will react and what it possibly means, the Earth’s response, and the potential for extra methane release from methane clathrates, stored at continental margins. There are many more climate unknowns, for example elaborated in this article https://thinkprogress.org/what-are-the-unknown-unknowns-of-global-warming-1438d934bdee
Climate Change Interview with James G. Anderson 2015 https://www.youtube.com/watch?v=Y12P76EYQJ8
Gulf Stream Slowdown may lead to hot European summer 2016 https://www.youtube.com/watch?v=4JyN2wE7Wuc
Jim Hansen on the Rate of Ice Sheet Melt 2015 https://www.youtube.com/watch?v=wdw37BeBi_4
Bill McGuire 2016 Waking the Climate Giant https://www.youtube.com/watch?v=DNWGlzHC2ss
Natalia Shakhova (2010) https://www.youtube.com/watch?v=eD8hU-lbqpE
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