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Flashcards in EARTH 114 Deck (16)
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1

Earth's temperature

1 degree C
1.5 degree F

2

Weather is ____ whereas climate is ____

short term, long term

3

Global average surface temperature

~15 C, 59F

4

Nitrogen percent of atmosphere

78%

5

Oxygen percent of atmosphere

20.9%

6

Argon percent of atmosphere

0.93%

7

Carbon dioxide percent of atmosphere

0.041%

8

Greenhouse gases

Carbon dioxide, Nitrous oxide, methane

9

Greenhouse gases

atmospheric gas molecule that absorbs and re-emits radiant energy in the longwave (infrared) part of the light spectrum (all GHGs are 'infrared active')
- selective absorbers
- Transparent to sunlight's shortwave light radiation

10

Greenhouse effect

process by which longwave radiation from Earth's surface is absorbed by atmospheric greenhouse gases and re-emitted back to the surface, causing planetary warming
- atmosphere is transparent to most solar radiation (shortwave)
- GHGs absorb longwave radiation from the earth and re-emit it in all directions

11

Earth's surface is heated by

sun's shortwave energy (visible, UV, and near IR)
- created in core of sun as hydrogen fused w helium
- converts matter into electromagnetic light

12

electromagnetic radiation

self-propogating waves in space that have electric and magnetic fields (a wave energy transfer across space at speed of light)

13

How much co2 do we emit each year

about 35 gigatons
- oceans, terrestrial biosphere, atmosphere(3 main reservoirs)

14

carbon based fossil fuels

natural gas (METHANE = CH4)
petroleum (liquid hydrocarbon)
coal (solid carbon)

15

carbon emissions increasing at about... and have increased by about

2 ppm a year, 100 ppm in the past 100 years

16

oceans take up about...

25% of carbon