11_energy_atm - Energybudgetandatmospheric circulation...

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Energy budget and atmospheric  circulation GS222 Lecture 11
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Overview - this lecture Climate system components Sun and albedo Greenhouse effect Basic atmospheric circulation
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The Climate System Weather vs. climate Weather:  short-term fluctuations (days, weeks) in  temperature, precipitation, and humidity resulting from  rapidly forming and decaying weather systems Climate:  average weather (mean and variability) over  longer timescales (seasons, years, decades and longer)  for a given region Why study it?
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5 climate system components
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5 climate system components 1) Atmosphere:  nitrogen (78%)  oxygen (21%)  argon (0.93%)  CO 2  (0.039%)   other (0.031%), includes water vapor example:   clouds reflect sunlight, CO 2  and water  vapor absorb outgoing longwave radiation 2) Biosphere:  all living organisms at or near the   earth’s surface example:   marine plants transfer carbon dioxide  from atmosphere to sea floor
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5 climate system components 4) Cryosphere:  ice, including polar ice sheets in   Greenland and Antarctica, sea ice,    and alpine glaciers example:   important influence on earth’s albedo (ice  covers 3% of earth’s surface today, ~10% during last  ice age )
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5 climate system components
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The Sun The dominant source of energy for the climate  system – it drives it.
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This note was uploaded on 01/20/2012 for the course GEO 222 taught by Professor Davidlund during the Winter '11 term at University of Michigan.

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11_energy_atm - Energybudgetandatmospheric circulation...

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