Arctic tundra carbon cycle #3 Flashcards
1
Q
Name a major carbon sink.
A
Permafrost estimated to contain 1600GT because cold temps slow decomposition of matter.
2
Q
How much greater is the amount of carbon stored in soil than above ground biomass stores?
A
5X greater.
3
Q
What season does the flux of carbon occur in and why?
A
In the summer when the active layer thaws and long daylight hrs mean plant grow rapidly.
4
Q
The tundra used to be a carbon …. but there are concerns it may turn into a carbon …….
A
Sink and source.
5
Q
Why might a negative feedback loop be reassuring?
A
More CO2 emisions means ice melts and plants can grow which absorb CO2
