Planetary Boundaries Flashcards
resillience
ability to absorbe disturbences while retaining the same basic structure,identity,and ways of functioning
threshold/tipping point
-critical transition from one stability domain to another one
-possibility of incresing abrupt,non-linear change
holocene
is the name given to the last 11,700 years* of the Earth’s history
The planetary bound-ary (PB) framework
provides a science-based analysisof the risk that human perturbations will de-stabilize the ES at the planetary
green
safe space
yellow
uncertaty if we crossed tipping point
red
very high risk that we will or did cross the tipping point
in 2009
noval entities
here de-fined as new substances,new forms of existing sub-stances, and modified lifeforms that have the po-tential for unwanted geo-physical and/or biologicaleffects
biosphere integrity: high risk
variable:extinction rate
biochemical flows:high risk
variable:nitrogen removed from the atmosphere for human use
climate change:increasing risk
concetratiom of co2 in the atmosphere
land system change:incresing risk
area of forest lands as % of original forest cover
proposed safe boundary 75%
latest data 60%
Updated planetary boundaries
(as of 2023)
2 new bondaries - we know better now
nova enetenty - got worst(we know more about it)
fresh water use - got worst
we are better at onzone deplication
Identifying interactions between Earth system processes(Earth processes cannot be treated in isolation – they
interact!
)
ex:climatechange are cause by land system change
