Greenhouse effect
Retention of solar energy in form of heat (atmospheric gas that absorb infrared radiation)
What gases absorbs infrared radiation?
Co2 & methane
2 light energy in greenhouse gases
- shortwave radiation -infrared radiation
How do GHGs radiate heat
By moving (vibrating (slower) and stretching)
Photosynthesis
Autotrophs acquire energy from sun light
Cellular respiration
Heterotrophs taking energy from sugars
Oxygen is
An electron donor
Life using inorganic substances as electron donors or acceptors, single cell organism
Chemeautotrophs
Name a specie that produces GHGs
Cows (through digestion) methane
Name 2 metrics used to compare relative impact of a gas on the greenhouse effect
- Residence time -Global warming potential
What’s the most important greenhouse gas
CO2 at highest concentration
Methanogens
Bacterial species
Anthropogenic source of methane
Agriculture
Methanogenesis is taking place
In digestion of animals like cow
Permafrost
Frozen soil water (been at least 2 years), in the absence of O2 = methanogenesis, it melts every season increasing temperature, it is a positive feedback loop
Nitrous oxide
Part of the nitrogen cycle, produced by bacteria in the cell, can also be produced as results of agriculture
