1. Which of the following energy fluxes is the greatest? A) energy flowing out o

Question

1. Which of the following energy fluxes is the greatest? A) energy flowing out of the Earth' interior
B) solar energy absorbed by Earth' atmosphere C) solar energy absorbed by Earth' surface

D) solar energy reflected by clouds and surface

2. Which of the following climate feedback systems is considerably uncertain in that we do not know whether the net effect is a positive feedback or a negative feedback?
A) albedo B) clouds C) plant growth D) water vapor

3. The process whereby warm water from equatorial regions is moved to more polar regions in the ocean basins is called _________.
A) thermohaline circulation C) cryospheric circulation
B) thermosphere circulation D) hydrocline circulation

4. Chemical analysis of ice cores demonstrates that as temperature increases, concentrations of atmospheric __________.
A) carbon dioxide and methane both decrease
B) carbon dioxide decreases while methane increases

C) carbon dioxide increases while methane decreases D) carbon dioxide and methane both increase

5. Based on ice core data, how rapidly can Earth shift from glacial to interglacial temperatures?

A) 10 to 30 years C) 1000 to 3000 years
B) 100 to 300 years D) 10,000 to 30,000 years

6. How often do El Nino events occur?
A) roughly every 5 years C) roughly every 100 years B) roughly every 20 years D) roughly every 400 years

7. How much did the average surface temperature increase during the twentieth century?

A) approximately 0.3 °C C) approximately 1.2 °C B) approximately 0.6 °C D) approximately 2.4 °C

8. During an El Nino year, which of the following occurs?

A) The Pacific trade winds decrease and cool water accumulates in the

eastern Pacific.

B) The Pacific trade winds decrease and warm water accumulates in the

eastern Pacific.

C) The Pacific trade winds increase and cool water accumulates in the eastern

Pacific.

D) The Pacific trade winds increase and warm water accumulates in the

eastern Pacific.

Explanation / Answer

1) C) solar energy absorbed by Earth' surface

2) B) clouds

3) A) thermohaline circulation

4) D) carbon dioxide and methane both increase

5) A) 10 to 30 years

6) A) roughly every 5 years

They occur irregurarly every 3 to 6 years

7) B) approximately 0.6 °C

The average surface temperature increased during twentytieth century by about 0.6C

8) C) The Pacific trade winds increase and cool water accumulates in the eastern

Pacific.

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