Atmospheric composition and climate
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greenhouse effect
solar radiation enters atmosphere and is reabsorbed by atmosphere or is reflected
what’s the equilvalence of one molecule of methane in co2
28 thus, methane is a strong and potent GHG
what is a sink for methane
tropospheric destruction - reacts in troposphere with OH
where does methane come from and how long does it stay in atmosphere
comes from - wetlands, termites, plants, ocean, cattle, sewage, fossil fuels and landfill etc - is coming out of ice bubbles stays in atmosphere for 10 yrs
one molecule of nitrous oxide is equivalent to how many co2
265 v potent impact is much lower tho cut we emit way less
what is a nitrous oxide sink
stratospheric loss
kohler theory
droplets forms when gas particles collide and stick together - nucleation
to nucleate rain droplets from pure water we need a supersaturation of what?
20% to reduce the required super saturation we need an existing particle as a CCN - aerosols
what % of incoming radiation to clouds reflect
30%
2 types of aerosol
scattering - reflect incoming sunlight and cool surface absorbing - warm atmosphere by absorbing infrared