ATMS Exam 4 Flashcards
Climate Change is
simple, serious, & solvable
simple
meaning we understand the problem
(well-understood science that goes back to 1800s)
serious
meaning that it is already impacting us and the impacts are accelerating
(impacts are already being felt & will only accelerate)
solvable
meaning that we have the knowledge and tools to avoids the worst impacts
(we have what we need to make changes)
Non-Linearity in Climate Change
refers to the disproportionate, unpredictable, and accelerating impacts of climate change.
Small increases in greenhouse gases can lead to sudden, dramatic changes in climate systems
- Feedback Loops
Postive Loops:
Melting ice reduces albedo, increasing heat absorption.
Negative Loop:
Increased plant growth absorbs CO2, slightly moderating warming.
- Tipping Points
Abrupt, irreversible changes when critical thresholds are crossed:
Collapse of the Atlantic Meridional Overturning Circulation (AMOC)
Amazon Rainforest dieback
- Disproportionate and Cascading Impacts
Small temperature increases can lead to a significant rise in extreme weather events.
Ecosystem collapse can trigger food security and health crises.
Example: Heatwaves worsening droughts, increasing wildfire risks.
- Non-linear Economic & Social Impacts
Agriculture: Beyond temperature thresholds, crop yields can plummet.
Health: Rapid spread of diseases due to changing climate zones.
Rising costs and economic losses as impacts escalate disproportionately.
- Cumulative & Compounding Effects
Combined effects of multiple climate impacts can be more severe.
Example: Rising sea levels amplifying storm surge damage.
Interconnected systems lead to complex, unexpected outcomes.
Implications of Non-linearity
Urgent need for early and effective climate action to prevent reaching tipping points.
Importance of adaptive strategies to manage unpredictable, accelerating impacts.
Non-linear effects make precise predictions challenging, highlighting the need for precaution.
Unmanaged Systems at Risk
Natural ecosystems are highly vulnerable to climate change:
They lack direct human management and cannot easily adapt.
Risks include loss of biodiversity, habitat destruction, and shifts in species distributions.
Ecosystem disruptions can impact human livelihoods dependent on natural resources.
Risk =
Hazard, Exposure, & Vulnerability/ Susceptibility
Hazard
Anticipated harmful thing
Exposure
who or what experiences the hazard
Vulnerability
how much someone or some place is impacted by the hazard
Physical vulnerability and sensitivity
Age, health status, pregnancy
Social vulnerability
Language, immigration status, economic status (poverty, access to transportation)
Discrimination as a source of social vulnerability
Gender, Race, LGBTQ+
Adaptation
Attempts to reduce the risk associated with climate change
Adaptation reduces risks associated with climate change by
- Reducing the hazard
- Reducing exposure
- Reducing vulnerability
- Increasing adaptive capacity & resilience
Managed Retreat
involves the purposeful, coordinated movement of people and buildings away from risks
Risk is countered by adaptive capacity
The ability to react in a way that reduces the negative impact or enhances the positive impact of a change or exposure to a hazard
Risk is countered by resilience
the ability to keep functioning despite change
Adaptation reduces risk not the amount of climate change
To reduce risk we need to know
- what the hazards are
- what the exposures are
- who and/or what is vulnerable and in what way
US Climate Resilience Tool Kit
- Explore Hazards
- Assess Vulnerability & Risks
- Investigate Options
- Prioritize & Plan
- Take Action
BRACE
B = Building
R = Resilience
A = Against
C = Climate
E = Effects
Resilience
refers to the ability of a system to recover from or bounce back after a disturbance or stressor.
Adaptive Capacity
refers to the ability of a system to adjust to long-term changes, uncertainties, and challenges.
Risk is countered by adaptive capacity
the ability to react in ways that reduces the negative impact or enhances the positive impact of a change or exposure to a hazard.
Risk is countered by resilience
the ability to keep functioning despite change.
What is adaption?
reduces the risks associated with climate change, but doesn’t necessarily reduce the amount climate change.
What is mitigation?
Reducing greenhouse gas emissions.
What drives emissions?
I = P A T
I =?
impact (emissions)
P =?
population