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Global Warming Inconvenient truth handout Physics of anthropogenic global warming Key diagrams Consequences What can you do? What causes Global Warming? Addition of greenhouse gases to atmosphere Main culprits are Carbon Dioxide, Methane, and water Trees take up CO 2 Animals Produce

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Global warming l.jpg

Global Warming

Inconvenient truth handout

Physics of anthropogenic global warming

Key diagrams

Consequences

What can you do?


What causes global warming l.jpg
What causes Global Warming?

  • Addition of greenhouse gases to atmosphere

  • Main culprits are Carbon Dioxide, Methane, and water


Slide4 l.jpg

Trees take up

CO2

Animals

Produce

Methane

CS Fig. 15.20

4


Basic physics l.jpg
Basic Physics

  • Greenhouse gases trap heat in Earth’s atmosphere

  • Greenhouse gas concentrations have risen

  • Trapped radiation has been measured

  • Planet will warm!!!!




Has the burning of fossil fuels resulted in increased co2 concentrations in the atmosphere l.jpg

Has the burning of fossil fuels resulted in increased CO2 concentrations in the atmosphere?

Yes!

Measurements of air in Hawaii

Measurements of ancient air preserved in ice


Slide11 l.jpg

CS Fig. 15.19 concentrations in the atmosphere?

11


Slide12 l.jpg

Bubbles in glacial concentrations in the atmosphere?

ice preserve

air of past cent-

uries:

Tell us what CO2

concentrations

were like before

the industrial

revolution


Longer records l.jpg

Last concentrations in the atmosphere?

Interglacial

Current

Longer records

Current

CO2 levels

are well above

range observed

during recent

geologic

history

associated with

the ice ages


Best evidence that recent warming is anthropogenic l.jpg

Can’t account concentrations in the atmosphere?

For recent warming

Can’t account

For prior warming

Works!

Best evidence that recent warming is anthropogenic

Three years in the

1990’s are the

warmest in the

Northern Hemisphere,

by far, of the last

400 years!

Data from Mann

and others,

Nature, 1998;

Figure from

IPCC 2001

Report


Consequences l.jpg
Consequences concentrations in the atmosphere?

  • Planet will warm

    • High latitudes will warm more than low latitudes

  • Sea level will rise

  • Questions:

    • How fast will warming and sea level rise occur

    • How will Earth’s weather patterns be affected


Global temperatures projected to rise 3 to 7 f l.jpg

Global Temperatures projected to rise concentrations in the atmosphere?3 to 7 °F

IPCC 2007

http://www.ipcc.ch/pdf/assessment-report/ar4/syr/ar4_syr_spm.pdf


Slide17 l.jpg

The maximum degree of global warming, as predicted by 95,000 home computers

Stainforth, D. A. et alNature433, 403−406 (2005).


Slide18 l.jpg

CS Fig. 15.23 home computers

18


Change in minnesota l.jpg
Change in Minnesota home computers

“Recent research indicates a warming trend in Minnesota. A study of the climate record at Fort Snelling shows an increase of 2.9°F in average annual temperature between the 1860s and 1987, almost three times the worldwide average. Analyses of more than a hundred temperature-depth profiles in North America show that ground latitudes comparable to Minnesota’s indicated ground warming of up to 3.6°F.”

From “Playing with Fire, Global Warming in Minnesota” 1999; data from Baker and Skaggs, 1989


Change in lake superior l.jpg
Change in Lake Superior home computers


Mn biomes at risk l.jpg
MN Biomes at risk home computers


The end l.jpg
The End home computers

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