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Transcript
Welcome to the Climate Change: Past,
Present and Future
zmescience.com
Your teacher: Wendy Hartnell
What this day school will do
A bit about me...
Let’s find out about you!
Upwood Day School: 5 March
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Introductions
What do we mean by climate change?
Earth’s climate machine
Intergovernmental Panel on Climate Change
Climate in the past
Geo-engineering
Quiz
How much do you agree?
• Climate change is happening.
• People are responsible for climate change.
Give a number between 1 and 10
10 means: I completely agree
1 means: I completely disagree
Film clip
What year are we looking at?
How many scenes can you identify?
Week 1: What’s all the fuss about?
Scientists agree
97%
A changing climate
Hopar glacier, Pakistan
Figure SPM.1b
Observed change in surface temperature 1901-2012
All Figures © IPCC 2013
Environmental refugees
Japanese cherry trees
Mount Pinatubo
Burning fossil fuels
Earth’s climate machine
Science: studying ice cores
Controversy
Meteorite or climate?
Snowball Earth
The vineyards of Cambridgeshire
Little Ice Age
Thames Frost Fair, 1683-84, by
Thomas Wyke
Personal actions
Solar Radiation Management
John Martin: The last man
(1849)
Energy efficiency
Which is most efficient?
Look at the handout in pairs
• Rank from 1 – 10 with 1 being least energy
efficient and 10 being most efficient
Why vegetarianism is more energy
efficient than eating meat
A little bit of chemistry...
Atoms and molecules
Hydrogen molecule H2
Water H2O
Methane CH4
3-methyl-1-butanethiol
Key term
Anthropogenic
IPCC Assessment Reports since 1990: WGI Contribution
1990
1995
2001
2007
2013
Observed Changes in the Climate System (1/2)
Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are
unprecedented over decades to millennia. The atmosphere and ocean have warmed, the amounts of
snow and ice have diminished, sea level has risen, and the concentrations of greenhouse gases have
increased.
Understanding the Climate System and its Recent Changes (1/1)
Human influence on the climate system is clear. This is evident from the increasing greenhouse gas
concentrations in the atmosphere, positive radiative forcing, observed warming, and understanding of
the climate system.
Future Global and Regional Climate Change (1/2)
Continued emissions of greenhouse gases will cause further warming and changes in all components
of the climate system. Limiting climate change will require substantial and sustained reductions of
greenhouse gas emissions.
Earth’s climate machine
Coffee time
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