As you read these questions keep in mind that if earth were say an apple then the atmosphere would be about the same proportion as the skin of the apple to the apple itself:
Is CO2 a greenhouse gas?
Is CO2 increasing dramatically since human industrialization began in our razor thin atmosphere beyond anything we've seen in the last 800,000 years?
What happens when you change the chemical makeup of our razor thin atmosphere and exponentially increase known greenhouse gasses?
How would you expect to significantly increase GHG in the atmosphere without impacting climate?
Understanding basic thermodynamics, what will happen in the arctic when it goes ice free and you have the sun beating down 24/7 on dark blue open ocean water?
What will be the impact of monsoon rains on arctic tundra?
What drives the global Thermohaline circulation current and what will be the impact of fresh water melting off Greenland be to the driving force of that circulation?
What drives the jet stream and how is the temperatures rising in the artic weakening it?
What happens when soil temperature reaches 104 degrees?
What causes crop failure?
What happens when the rate of change in climate exceeds a living organisms ability to adapt?
What happens when the rate of change in climate causes loss of habitat for what a species depends upon in order to survive?
With no ice in the Northern Hemisphere, no jet stream, no Thermohaline circulation, no grain crops, nothing we understand that drives our climate, what will the world look like?
Finally, once warm water flowing into the arctic sufficiently destabilizes methane clathrates in the Eastern Siberian Arctic Ice Shelf and they rapidly begin pumping say 50 gigatons (out of 700gt available) of CH4 (methane) directly into the atmosphere, what happens?
The below quotes are from
"Professor Peter Wadhams is the world’s most renowned polar ice scientist with 46 years of research on sea ice and ocean processes in the Arctic and the Antarctic. Since 2015, he serves as Professor Emeritus of Ocean Physics, Cambridge University. He was Director of the Scott Polar Institute in Cambridge from 1987 to 1992 and Professor of Ocean Physics at Cambridge from 1992 to 2015. He has made more than 50 expeditions to both polar regions, working from ice camps, icebreakers, aircraft, and, uniquely, Royal Navy submarines (making six submerged voyages to the North Pole). His research group in Cambridge has been the only UK group with the capacity to carry out field work on sea ice. He has also held visiting professorships at the National Institute of Polar Research, Tokyo, the US Naval Postgraduate School, Monterey, the University of Washington, Seattle and the Scripps Institution of Oceanography, La Jolla. Peter Wadhams has been awarded the W.S. Bruce Prize of the Royal Society of Edinburgh (1977), the UK Polar Medal (1987) and the Italgas Prize for Environmental Sciences (1990). He is an Associate Professor at the Laboratoire d'Océanographie de Villefranche, and a Professor at the Università Politecnica delle Marche, Ancona. He is also a Fellow of the Royal Geographical Society and a Member of the Finnish Academy."
The quotes and corresponding page numbers are taken from A Farewell to Ice:
“We must remember— many scientists, alas, forget—that it is only since 2005 that substantial summer open water has existed on Arctic shelves, so we are in an entirely new situation with a new melt phenomenon taking place.” (Wadhams, pg. 123)
“First, the probability of this pulse happening is high, at least 50 per cent according to the analysis of sediment composition by those best placed to know what is going on, Natalia Shakhova and Igor Semiletov. Moreover, if it happens, the detrimental effects are gigantic… the risk of an Arctic seabed methane pulse is one of the greatest immediate risks facing the human race… Why then are we doing nothing about it? Why is this risks ignored by climate scientists, and scarcely mentioned in the latest IPCC assessment? It seems to be not just climate change deniers who wish to conceal the Arctic methane threat, but also many Arctic scientists, including so-called ‘methane experts.” (Wadhams, pg. 127-28)