Greenhouse gases such as carbon dioxide (CO2) and methane (CH4)

Question 4: Don’t label the graph, just
write down what today’s CO2 concentration is.

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Question 5: Don’t use the graph in the
assignment, but tell me which letters label glacials and which letters label
interglacials in the attached
figure.

DUE: Monday, July 28, 11:59 PM

Greenhouse
gases such as carbon dioxide (CO2) and methane (CH4) trap long-wavelength solar
radiation in the atmosphere. There is
strong evidence that average global temperatures are slowly risking. A likely cause of global warming is the
clear trend of increasing concentration of greenhouse gases due to the burning
of fossil fuels. The plot below shows
the monthly mean concentration of as measured near the summit of Mauna Loa in
Hawaii since 1958 (the International Geophysical year).

1)
Describe
the trend of CO2 over the last 40 years.
Has CO2 changed at a constant rate?

2)
What
is responsible for the distinctive “saw-tooth” (zig-zag) pattern superposed on
the overall long-term trend of rising CO2?

3)

4)
What
is the natural range of variability in the CO2 prior to growth of the human
population and industrialization?

5)
Where
is today’s concentration of CO2?

6)
Indicate
the times when the Earth (use graph below) was colder (glaciation) and warmer
(interglacials). What would sea level be
like during these times? Why?

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