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Arctic permafrost and Methane
Transcript of Arctic permafrost and Methane
Also known as cryotic soil
Only forms when temperature stays below freezing annually
Mostly in Northern Hemisphere
Permafrost affects climate
Permafrost stores carbon
Permafrost reflects sunlight
Provides summer melt water
Carbon stored as peat & methane
Double in permafrost store as atmosphere
Stores release as permafrost thaws
Thaw leads to more thaw= positive feedback
More heat means faster methane production(methenogenisis)= more heating
Arctic Permafrost and Methane
Good & Bads of Methane
Effect on People
Damage to Planet
The most potent GHG
Naturally a gas
Stored in permafrost
Main component in all natural gas
Useful once refined as fuel
Naturally found in anaerobic environments (methenogenisis)
Good as fuel
Very harmful in the atmosphere
Produces CO2 when burned
Methane much more potent than CO2
Rises from stores into atmosphere
86x more potent over 20 year span(if methane was dominate gas)
as trace gas accounts for 20% of radiative forcing
Some cultures rely on annual controlled melt for water and/or power
Animals that we hunt mostly appear during melt for water
Creating positive feedback
Contributing to rising temperatures
Soon to leave melt water dependents empty handed
Adding to GHG problem
Loss of season variation in arctic
Loss of species potentially
When does permafrost form?
What makes up carbon stores?
What does positive feedback mean?
T/F methane is the main part of natural gas?
What is the most potent GHG?
Whats one long-term effect?