Year https://svs.gsfc.nasa.gov/4419 Energy made from fossil fuels warms our planet. Climate Change Dr. Loraine Lundquist • What kind of climate change are we experiencing now? • What is causing that change? • How sure are we about what’s causing it? • What are/will be the effects of that change? • What can we do to prevent those effects? What is climate change all about? It’s warming. It’s us. We’re sure. It’s bad. We can fix it. Leonardo DiCaprio acceptance speech this week Oscar for Best Actor • It’s warming • It’s us • We’re sure • It’s bad • We can fix it 5 Key Points about Climate Change:
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Year
https://svs.gsfc.nasa.gov/4419
Energy made from fossil fuels warms our planet.
Climate ChangeDr. Loraine Lundquist
• What kind of climate change are we experiencing now?
• What is causing that change?
• How sure are we about what’s causing it?
• What are/will be the effects of that change?
• What can we do to prevent those effects?
What is climate change all about?
It’s warming.
It’s us.
We’re sure.
It’s bad.
We can fix it.
Leonardo DiCaprio acceptance speech this weekOscar for Best Actor
“For the past 18 years, weather satellites have not
measured a global increase in temperatures although
carbon dioxide (CO2) in the atmosphere has increased over that same period.”
Rep. Lamar Smith Chair of US House Comm. on Science, Space, and Technology
Sen. James Inhofe Chair of US Senate Comm. on
Environment and Public Works
http://www.skepticalscience.com/graphics.php?g=8
There are 13 independent indicators of warming. Temperatures are rising in the last 100 years.
Climate Change: Evidence and Causes: An overview from the Royal Society and the US National Academy of Sciences: http://dels.nas.edu/resources/static-assets/exec-office-other/climate-change-full.pdf
It’s risen about 1°C (1.8°F) over pre-industrial levels.
2015 was the hottest year on record
http://www.skepticalscience.com/graphics.php?g=8
There are 13 different independent indicators that the world is warming.
“It is extremely likely [>95% probability] that human influence has been the dominant cause of the observed warming since the mid-20th
century”
http://www.skepticalscience.com/big-picture.html
10 “human fingerprints” indicate the warming is not natural.
IPCC 2014 Report (AR5)
• IPCC = Intergovernmental Panel on Climate Change
- The world’s foremost body on climate change
- 259 authors in 39 countries
• “Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia.”
• “It is extremely likely [>95% probability] that human influence has been the dominant cause of the observed warming since the mid-20th century”
http://www.ipcc.ch/report/ar5/wg1/
History
If we do nothing.
If we act swiftly and make changes.
The number of extreme heat days
is predicted to rise dramatically if we take no acton on climate change.
Discuss with the person next to you:
What was it like to talk about climate change with people you don’t usually talk about it with?
• It’s warming
• It’s us
• We’re sure
• It’s bad
• We can fix it
• It’s warming
• It’s us
• We’re sure
• It’s bad
• We can fix it
• It’s warming
• It’s us
• We’re sure
• It’s bad
• We can fix it
• It’s warming
• It’s us
• We’re sure
• It’s bad
• We can fix it
This Louisiana flooding was made at least 40% more likely due to climate
change.
Extreme weather events are getting bigger and more intense
• It’s warming
• It’s us
• We’re sure
• It’s bad
• We can fix it
Extreme weather events are getting bigger and more intense
Temperature and CO2 are extremely well correlated in history.
Climate Change: Evidence and Causes: An overview from the Royal Society and the US National Academy of Sciences: http://dels.nas.edu/resources/static-assets/exec-office-other/climate-change-full.pdf
The Great Barrier Reef experienced a massive bleaching and die-off event this year.
“researchers calculated there's between a 70 percent and 90 percent chance the Southwest will experience a megadrought [oppressive dry spells lasting at least 20
years] later this century [if we take no action].”
researchers calculated there's between a 70 percent and 90 percent chance the Southwest will experience a megadrought [oppressive dry spells lasting at least 20
years] later this century [if we take no action].
If countries follow through with the Paris climate agreement to reduce emissions from the burning of coal, natural gas and oil to limit global temperature rise to well below 2
degrees Celsius (3.6 degrees Fahrenheit), then the risks are cut nearly in half