Test your basic knowledge |

Global Warming

Subjects : literacy, science
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 1. They are the largest contributor to sea level rise 2. Can affect the thermohaline circulation (mainly in Greenland) 3. Are directly connected to climate change

2. 1. Land usage changes 2. Seasonal timing 3. Rising CO2 levels may be a factor

3. Ocean retains ____ CO2

4. Thawing permafrost weakens coastal lands. Risk of flooding in coastal wetlands. Pollution and toxins locked in the snow and ice will be released.

5. Some parts of the planet are dry because of their location: most of the deserts are around 30 N and 30 S - where sinking air predominates

6. Concentration of 380 ppmv - Have risen about 40% - Preindustrial~ 270~280 ppmv

7. Land Based Ecosystems retain ____ CO2.

8. 2ppm of the atmosphere - less than 20% of greenhouse gases - 1/3 greenhouse gases effect of CO2

9. O Unfrozen soil that stays within the permafrost.

10. Sea ice extent in Antarctica is rapidly reducing. Seasonal variability. People - Animals and Ice

11. Holds unique and key information - Are highly interconnected - Respond and drive climate change - Are the largest freshwater reservoirs of the planet - Ice cores tell us that in climate records - nothing is regular and ice sheet plays major role.

12. The heat input is either driven by the 1- thermohaline circulation associated with sea ice formation. The direct influx of intermediate warmth water.

13. 1. Altimetry survey 2. Time-variable gravity 3. Ice motion + Regional Climate Modeling

14. Changes in the Earth's solar radiation levels can impact the climate. Shortterm warming cycles on Earth.

15. By contrast reflects only about 7% of solar radiation (Albedo~7%) - absorbing 93%.

16. A thick - floating slab of freshwater ice extending from coast to coast.

17. 10 : 1 - grounding ; surface

18. CO2 ____ in winter in the NH and ____ decreases during the 'greening season'

19. Low clouds are a ____ feedback; they will reflect more sunlight. Clouds reflect shortwave radiation but also absorb longwave radiation

20. Most of the deserts are around 30 N and 30 S - where sinking air predominates

21. Is not an externally imposed perturbation to the climate system.

22. 23 -45 degrees. The Larger the tilt the larger the variability of the seasons.

23. In _______ - the inversions are less frequent and weaker in the Arctic.

24. The last portion of a glacier grounded to bedrock - after this line there are ice shelves.

25. 342 W/m squared - DWEC - These things reflect sunlight (30%): water vapor - clouds - dust particles - earth's surface

26. Ice sheets have a very ____ Albedo

27. Set up in 1988 by WMO and UNEP.

28. Positive Albedo Feedback - increase in temperature melts ice and snow reduces albedo increases temperature melts ice and snow reduces albedo... ETC

29. Over the Northern Hemisphere than the tropics.

30. The Earth emits this.

31. Floating extensions are ice shelves - rivers of ice are ice streams or outlet glaciers - the junctions with the ocean are called the grounding line.

32. CO2 - CH4 - O3 - H2O - N2O - CFCs

33. Top layer of soil that thaws during the summer and freezes again during autumn. - Between 1 and 3 m thick.

34. On a clear cold day - the thin layer of air hugging the ground is called inversion. This layer is much cooler than the air a few hundred meters above it.

35. The amount of light reflected by an object.

36. A process whereby slabs of ice at the glacier margin mechanically fracture and detach from the main ice mass -

37. Rainy on yearly average. In these regions - rising air predominates.

38. Closed talik can develop when lakes fill in with sediment and become deposits of dead plant material (bog).

39. The Day After Tomorrow - Circulation will slow by 10% to 50% in the next century

40. x7 smaller - 7m total sea level equivalent.

41. 85%

42. Amount of light absorbed by surface

43. ~10% of incident solar energy (albedo 90)

44. Amount of light absorbed by atmosphere

45. Water vapor - 36-70% - carbon dioxide - 9-26% - methane - 4-9% - ozone - 3-7%

46. Hydrological drought is associated with the effect of low rainfall on water levels in rivers -!reservoirs -!lakes and aquifers.

47. Higher temperature increases atmospheric water vapor @ global scale more water vapor in the air that causes nights to stay warmer.

48. The land-surface configuration that results from the melting of ground ice in a region where permafrost degrades is called Thermokarst.

49. Carbon dioxide - Methane - Ozone - Water Vapor - Few others - Most ___________________ are mixed in the troposphere (Except water vapor) - Water vapor is concentrated closer to the ground.

50. Unfrozen ground that is found within a mass of permafrost