ENV100Y5 Lecture : env100 note 41.docx

• School: UTM
• Department: Environment
• Course: ENV100Y5
• Professor: murk

Document Summary

These lectures will help you understand: earth"s energy balance and climate system, methods and tools of climate research, human influences on climate, possible impacts of global climatic change, ways we can respond to climate change. Impacts that are global in extent: cumulative or synergistic effects of local/regional actions. Impacts that are long-lasting or potentially permanent: atmospheric change, stratospheric ozone depletion, global climatic change. Global change affects the global commons : common property resources are collectively owned or communally accessed or utilized, the tragedy of the commons, global commons: outside national jurisdiction. Solar energy powers life: the sun radiates energy, mainly in the shorter wavelength portions of the electromagnetic spectrum. Sources/inputs: sun-solar energy = 99. 986, source: nuclear fusion, earth"s interior- terrestrial energy=0. 012, sources: decay of naturally radioactive elements, compressional heating, residual heat, etc, tidal energy=0. 002, source: moon-earth-sun gravitational interaction. Storage reservoirs: ocean and cryosphere (frozen parts, land and soil, biosphere mainly plants, fossil fuels, atmosphere and clouds.