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23 Cards in this Set
- Front
- Back
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carbon cycle: areas that contain carbon dioxide
least --> greatest |
rivers<marine biota 3 < sediments 150 < vegetation 610 < dissolved organic __something__ 700 < atmosphere 750 < ocean surface 1020 < soils 1580 < fossil fuels 4000 < deep ocean 38100
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major culprits of global warming
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fossil fuels
cement production deforestation exponential human population growth |
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how does deforestation contribute to global warming?
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plants use CO2 to fix carbon, without plants, CO2 increases
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how does human population growth contribute to global warming?
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respiration using oxygen and converting to CO2
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what type of wavelength (long / short)does the sun release in light energy to the earth?
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short
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what type of wavelength (long/short) does the earth release in heat?
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long
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CO2 does not absorb _____, but does absorb _____
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CO2 does not absorb energy from the sun, but does absorb heat energy released from earth
Co2 lets light in but does not let heat energy out |
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by 2100, the global warming projections show that (worst case), the temperature will have risen by ___ degrees
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5 degrees Celsius (approx. 10 degrees Fareinheit)
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compare how carbon much phytoplankton fix compared to plants
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equal
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___% of ocean, abundances of phytoplankton are low even though plenty of light and other nutrients
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20
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John H. Martin
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came up with "The Iron Hypothesis"
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The Iron Hypothesis
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Iron can limit phytoplankton production
without iron, phytoplankton cannot convert organic carbon to energy through aerobic respiration |
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supposedly: __________ tons of carbon removed per 1 ton of iron added
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33,000-110,000
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field eidence: dust correlating to the iron hypothesis
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massive amounts of iron-rich dust are deliered to high nutrient, sunlit waters, high productivity of phytoplankton
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experiments: added iron -->
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phytoplankton bloomed
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shallow carbon burial depths
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5-50% carbon rests mid depth in ocean for 10s of years until moving downward
only 1-15% reach bottom |
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at surface waters: huge blooms of phytoplankton may
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deplete surface waters of other nutrients
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bloom may also change bottom ______
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ecology
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continuous iron may favor wrong __ and/or _____ depletion
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species
oxygen |
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good case scenario of phytoplankton bloom
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high phytoplankton, high zooplankton, big fish
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bad case scenario of phytoplankton bloom
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high phytoplankton, too many zooplankton, extreme bio oxygen demand, ecosystem collapse
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what to do
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focus on the sources of co2
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__________ (easy/hard) to put nature back together again
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difficult/impossible
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