climate - An Envelope of Gas: An Earths Atmosphere and...

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An Envelope of Gas: An Envelope of Gas: Earth’s Atmosphere and Climate Earth’s Atmosphere and Climate
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Introduction Introduction Earth’s atmosphere - mixture of gases - air. Atmosphere governs physical conditions of weather - what happens outdoors in a specific place at a given time. Temperature, Pressure, Moisture content, Wind. Short period of time (minutes to hours) Climate - average weather for a particular region and time period. 30 years e.g. Seattle has a rainy climate.
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Atmospheric Components Atmospheric Components Present mix of gases: Nitrogen: 78% Oxygen: 21% Other gases: 1% Argon Carbon dioxide Methane Sulfur dioxide Ozone Radon
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Atmospheric Pollutants Atmospheric Pollutants Humans add gases, aerosols to atmosphere. Fossil fuel combustion. Industrial processes. Can cause environmental harm. Acid rain – Sulfate, nitrate acidify precipitation. – Greenhouse gases – CO 2 and CH 4 trap heat.
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Structure of Atmosphere Structure of Atmosphere Coldest part Meteors start to burn Ozone layer - absorbs UV radiation Weather, Clouds, wind
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Incoming solar Solar energy = Insolation = in coming sol ar radi ation . Mostly in visible spectrum Reradiated as infrared radiation Heat trapped by greenhouse gases (mostly CO 2 ) Insolation Insolation
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climate - An Envelope of Gas: An Earths Atmosphere and...

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