14 terms

Systems in Water and Carbon Cycles

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Open System
any system which has external inputs and external outputs
Positive feedback
enhances or amplifies an effect by it having an influence on the process which gave rise to it.
Negative feedback
dampens or reduces an effect by it having an influence on the process that gave rise to it
Methane release from the tundra
example of positive feedback in the carbon cycle, rising temps release methane which rises temps
Extra plant growth
example of negative feedback in carbon cycle as plants absorb carbon reducing rate of climate change
Dynamic equilibrium
lack of change in a system as inputs and outputs remain in balance over periods of time.
Isolated systems
These have no interactions with anything outside of the system boundary. There is no input or output of energy or matter
Closed systems
these have transfers of energy both into and beyond the system boundary but not transfer of matter
Cascading system
the transfer of mass and energy along a chain of component subsystems, such that the output from one subsystem becomes the input for the adjacent subsystem.
River sediment into coastal zone
example of a cascading system
Atmospheric system
the inputs, flows and outputs all associated with the layer of gasses surrounding our planet
Lithospheric system
the inputs, flows and outputs all associated with the cold, hard solid land of the planet's crust (surface)
Hydrospheric system
the inputs, flows and outputs all associated with the water on our planet
Biospheric system
the inputs, flows and outputs all associated with the biology and ecosystems of our planet