BIO220H1 Chapter : Notes on "Truths and Myths about Global Warming"

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20 Apr 2012

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Notes on truths and myths about global warming . Can be cause by sun or greenhouse gases: polar areas warming more quickly than middle latitudes, winter temperatures rising faster than summer temperatures. Specific to greenhouse gases; not caused by the sun: night-time temperatures rising faster than daytime, lower atmosphere heating, upper atmosphere cooling. Popular myths about global warming: prehistoric climate was much greater than now, variation in sunlight, will make next ice age milder, good for agriculture, unproven theory, preventing global warming impact out economy.

Related Questions

If greenhouse gasses in the atmosphere are responsible for global climate change, which pattern would you expect to see:

a. A larger increase in nighttime temperatures than daytime temperatures

b. A larger increase in daytime temperatures than nighttime temperatures

c. A larger decrease in nighttime temperatures than daytime temperatures

d. A larger decrease in daytime temperatures than nighttime temperatures

As you may know, the causes of global warming and climate change are debated in scientific circles. Some say greenhouse gases are to blame; others say the earth regularly experiences cycles of warming and cooling. Some point to our recent record cold temperatures and snowfall, and ask how can we blame global warming? Still other scientists are predicting that our present global warming trend will result in a new Ice Age.

Try to locate the physics principle(s) which provide a logical progression from warmer temperatures to an Ice Age. You don't have to believe the theory, just merely repeat it here and discuss its merits or deniability.

erinferret495

Put the steps of the greenhouse effect in order, beginning with the Sun emitting radiation and ending with Earth's surface experiencing an additional rise in temperature.

The Sun emits radiation

Earth's surface experiences a further temperature increase

answer bank:

-Earth's surface and greenhouse gases emit infrared radiation

-Greenhouse gases absorb infrared radiation released from the Earth's system.

-Greenhouse gases re-emit infrared radiation that came from the Earth system.

'-Some of the infrared radiation re-released from greenhouse gases returns back to Earth's surface

-Solar radiation penetrates the atmosphere.

-solar radiation warms the atmosphere and Earth's surface.

BIO220H1 Chapter : Notes on "Truths and Myths about Global Warming"

BIO220H1 Full Course Notes

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