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.

0:04 #1 Ozone Loss
4:00 #2 Rate of Sea Level Rise
7:32 #3 Gulf Stream Slowdown
11:18 #4 Earth’s Response
17:40 #5 Methane Hydrates

There are many more climate unknowns, for example elaborated in this article https://thinkprogress.org/what-are-the-unknown-unknowns-of-global-warming-1438d934bdee

Speaker

• 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://climatestate.com/2018/03/21/waking-the-climate-giant/
• Natalia Shakhova (2010) https://www.youtube.com/watch?v=eD8hU-lbqpE