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ENVM3115 Lecture 1 part 2 (Climate long term average of weather (Observed…
ENVM3115 Lecture 1 part 2
Climate disruption
conditions outside what has been predicted
natural hazard
process or phenomenon
cause loss of li
risk
combo of event probability and negative consequences
vulnrability
characteristics and circumstances of a community system or asset that makes it suceptabile or not to the effects of damaging natural hazards
things that can be done terminology
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mitigation
reduce emmisions
lessening adverse effects
Preparedness
knowldedge developed by gov and respondin gorgs and communities to antipate and recover from hazard
Adaptation
Adustment in natural or human systems in response to expected cliimate stimuli or their effects when moderates harm or exploits benificial oppertunities
resilance
exposed to hazard resist absorb accomidate and recover timely including preservation restoration of basic functions and structures
System concept
coupled system - inextircably linked
el nino la nina
latency and delay
difference between how and when a system is disturbed and how and when it changes
inertia threshold
negative feed back makes climate change worse
Carbon Cycle
Climate long term average of weather
mean mean max mean min
evapotransporatoion large scale wind patterns and solar radiation
Natural climate variability
orbit of the earth round the sun
Milankovic cycle
oscillation
variation due to non linear feed back
ic
ice albedo feedback
climate system oscillations eg El Nino and Pacific decadal oscillation
changes in biochem make up due to random erruptions aerosols that cool the earth
Observed climate change
Global mean increace of 0.8.C
aus 0.9
decades getting warmier
weahter balloons and geological
southern artic lows provide rain to coastal south monsons coastal norths easteriles come into east coast bringing rain
Corrleations
planetry
hotter sorm system hold more energy becomes more powerful
sun
drivers of climate change
energy balance in earth systems
Positive and negative feedback mechanisms
Radiative forcing (radiation convection and conduction
anthroprogenic
enteric methane from grazing animals
nitrogen fertiliser manufacture and use
industrial processes cement and chemicals
carbonate rocks
landuse use controversial big contribution from greenhouse gases volcanoes and urban aerosols have a negative forcing effect
climate never over 300ppm historiclly