Arctic Winter Sea Ice (should this be summer?)

latent allready in atmosphere

1% a year now of earths land

IPCC report Aug 2019

Will release 100 GT co2 /50% absorbed by oceans or more

1PPM CO2= 2.12 GtCarbon ( IPCC and Gilbert Masters)

Permafrost thaw will release enough CO2 and CH4 that it will join the world stage of major emitters. 3/

2) Permafrost stores enough mercury & arsenic to contaminate most of the planet.

20% Chance 8 deg in next 5 years - Guy McPherson

Atmosperic vapor doubles the heat from all sources

https://theconversation.com/how-rising-water-vapour-in-the-atmosphere-is-amplifying-warming-and-making-extreme-weather-worse-213347?utm_source=twitter&utm_medium=bylinetwitterbutton

Corn productivity drops 50% productivity per degree increase

temperatures rise twice as fast inland as on coast

Conclusion: Center of continents will no longer produce grain at around 3.5-4C

manmade reflectants that will dissappear after civ collapse

http://www.globalissues.org/article/529/global-dimming

Soil Drought and atmospheric aridity feedback loop

“A temperature rise of 1 degree Celsius leads to 6 to 20 percent higher emissions of methane bubbles,” researchers from Radboud University wrote in 2017.

Total Potential Temp Rise C

https://www.scientificamerican.com/article/seas-may-rise-23-meters-per-degree/

1 trillion tons of ice = about 3 mm of sea level rise

1km = billion tons

Research published in 2016 calculated that for every tonne of CO2 emitted into the atmosphere, summer sea ice cover in the Arctic shrinks by three square metres. (A tonne of CO2 is around the amount emitted by someone travelling on a return economy ticket from London to New York.)