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. Much of the Arctic is overlain by snow and sea ice (land ice and sea ice) - It makes warming a much bigger deal in the Arctic

2. Betts et al found that: if CO-2 __________ this has a physiological effect on plant transpiration increased simulated runoff by 6% b. How? i. More CO2 1. Plants pores open less 2. This reduces transpiration 3. More water in the land surface

3. Refers to a body of freshwater - usually shallow - formed in a depression by melt water from thawing permafrost.

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

5. Clouds 40~90% - Vegetation 10~15%

6. The past climate...for this reason - both keep good records of climate change.

7. The major distinction between the Protocol and the Convention is that while the Convention encouraged industrialized countries to stabilize GHG emissions - the Protocol commits them to do so.

8. Warming- positive feedback - Cooling- negative feedback.

9. The Earth emits this.

10. A mass of land ice - continental or sub-continental in extent - and thick enough to cover most of the underlying bedrock topography - If you have a warm ocean - it will melt the ice sheet. Its shape is mainly determined by the dynamics of its outward

11. Taliks are found under lakes because of the ability of water to store and vertically transfer heat energy - Vertical extent of the taliks found under lakes is related to the depth and volume of the overlying water body.

12. If the Earth is warmer - are we going to have the Hadley cell stronger or weaker? Hotter = heat rises which increases the circulation.

13. Temperature needed to melt at depth is much lower than that needed to melt at the surface.

14. Ocean retains ____ CO2

15. The high pressure decreases the melting point and favors melting - Melt water being less dense rises along the water column along the ice shelf bottom and may either escape the cavity or refreeze at some intermediate depth. Melting point decreases:

16. How often does El Nio occur?

17. Prolonged period of excessively hot weather - Which may be accompanied by high humidity.

18. Greenhouse gases are mixed in the ____

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

20. Just remember the general direction of the circulation - Rising northern pacific. You start in between Greenland and Europe (youngest water) - Oldest water is in the Pacific Ocean - Salty water> fresh water - Cold Water > Warm Water

21. They saw a massive thinning of the ice where it enters into the ocean - This is due to the pronounced melting of the ice once it is in contact with the ocean. Melt rates of 25 m/year near the grounding lines and more than 10 m/year on average.

22. SALTY WATER = MORE DENSE - Maximum density at 4OC - This is why ice melting is a big deal; if the whole circle slows down - Ice bergs are fresh water higher sea level rise.

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

24. Really measures volume.

25. Due to a set of mutually reinforcing processes - climate change appears to be progressing in the arctic more quickly than in any other region on Earth.

26. Antarctica - stratosphere - Sep-Oct

27. 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.

28. A climate forcing agent formed through the incomplete combustion of fossil fuels - biofuel - and biomass; emitted both anthropogenic:ally and naturally.

29. High vs low

30. Where does the ozone protect us?

31. O Unfrozen soil that stays within the permafrost.

32. How much is the planet really warming?

33. Same amount of H2O - Mass does not change - Density of ice < density of water - Volume of ice > volume of water

34. 2ppm of the atmosphere - less than 20% of greenhouse gases - 1/3 greenhouse gases effect of CO2

35. Melting Point decreases

36. 342 W/m squared - DWEC - These things reflect sunlight (30%): water vapor - clouds - dust particles - earth's surface

37. Where do greenhouse gases warm up the Earth?

38. Tundra absorbs more energy than ice and snow but less than scrubs and forest - and with those plants migrating towards the north - they will further contribute ot absorb more energy.

39. Reduction of snow and ice cover - Changes in atmospheric circulation.

40. Average molecular life span is less than 10 years - Major sources: Wetlands and oceans - Raising cattle and landfills.

41. Poor resolution (200-400 km) does not allow us to distinguish glaciers and basins.

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

43. Laser radar - H V - Long time series - high accuracy - Density

44. High clouds are a ____ feedback; larger greenhouse warming - Clouds reflect shortwave radiation but also absorb longwave radiation

45. O Climate change in the Arctic is occurring now - Changes have been huge already

46. LW - SW - 55% absorbed by surface

47. Heat is provided by outside sources that flow down the continental slope to reach the deepest part of the glacier. High pressure decreases the melting point and favors melting.

48. 23 -45 degrees. The Larger the tilt the larger the variability of the seasons.

49. Massive cooldown has allowed colder conditions to persist leading to cfcs stabilizing leading to ozone depletion. Later - more warming will lead to more moisture in the air which will lead to more snowfall!

50. Is best viewed as a combination of...- Natural Variability - Associated with atmospheric circulation patterns - Growing Radiative Forcing - Associated with rising concentrations of atmospheric greenhouse gases - Strongly suggests a human influence.