Presentation on theme: "The Atmosphere, Global Circulation, and Climate Topic 6."— Presentation transcript:
The Atmosphere, Global Circulation, and Climate Topic 6
The Atmosphere Atmosphere pie Layers of air above us, separated by thermoclines Troposphere –78% N 2 –21% O 2 –1% Gases, water vapor, dust, soot particulates –Involved in biogeochemical cycling Stratosphere –Similar concentrations of gases with two exceptions: H 2 O is much lower and O 3 is much higher –ozone layer= “global sunscreen” –produced when O 2 interacts with UV light Figure 19.2
Local climates are affected by –uneven heating of the earth’s surface by solar energy –seasonal changes in temperature and precipitation –rotation of earth on axis –properties of air, land, and water
Properties of air Density Water vapor holding capacity Response to pressure changes Latent heat release SO, in the atmosphere there is lots of heat transfer going on. What is the fancy name for this? CONVECTION!
Deeper water currents (thermohaline circulation)
Local climate is determined by… Distribution of heat by air and ocean currents Distribution of precipitation by air currents Seasonal changes in solar radiation distribution (which in turn affects the two properties above)