Thursday, November 8, 2012

Summary of Notes on November 8


Solar Radiation drives earth’s weather even though it is far away.  Our weather only occurs in the first 10 to 15 km of the atmosphere. Ground based smog has a huge impact on our lives because it can affect our climate and make it hotter, colder, wetter or drier. In the past 100 years, the levels of carbon dioxide, methane, and nitrogen oxides have risen because of the use of fossil fuels. These pollutants have built up over the years and have contributed to the Greenhouse effect which has led to climate change, smog, melting of the polar ice caps, and other disastrous effects.

Most of our weather is driver by warm or cold air currents and high or low pressure systems. Warm air leaves behind low pressure systems and cold air leaves behind high pressure systems. Warm air tends to follow cold air and this creates wind. Winds are horizontal air flows and they blow from areas of high pressure to areas of low pressure. Humidity isthe amount of water vapor stuck between the molecules in the air. The air's ability to hold water depends on the air temperature. Relative humidity is the amount of water vapor that is in the air compared to the amount that the air can hold.
100% means that the air is completely saturated.