Insolation2
- 1. LEARNING OBJECTIVES  To be able to get knowledge about “Sun” as the main source of energy  To be able to analyse the factors responsible for varying rates of surface insolation
- 2. LEARNING OUTCOMES ALL: Students will be able to reason out how the rates of insolation decreases with latitude from equator to poles. MOST: Students will be able to differentiate between the patterns of sun radiations at the equator and at poles SOME: Students will be able to evaluate and justify the impact of different factors acting on the climatic condition of the place.
- 3. Insolation  Insolation is the solar radiation that reaches the earth's surface.  Insolation affects temperature. The more the insolation, the higher the temperature.  Rates of insolation vary greatly from place to place. The main control is the latitude.
- 4. Factors affecting insolation  Distance between the sun and the earth  Angle of the Sun  Duration of the day light
- 6. Effects of Latitude on Temperature
- 7.  The Sun's rays travel a short distance through the atmosphere  Less heat is lost to the atmosphere  More of the Sun's rays reach the Earth's surface  Sun's rays pass through a longer distance in the atmosphere  More heat is lost in the atmosphere  More of the Sun’s rays disperse Effect of Latitude on Temperature
- 8. EFFECTS OF ALTITUDE ON TEMPERATURE  The Earth's surface absorbs most of the heat.  As, the Earth's surface warms up, the heat diffuses into the lower layers of the atmosphere and warming it.  This in turn transfers some of the heat to the upper layers of the atmosphere.  The layers of atmosphere closest to the Earth's surface receive the most heat from the Earth's surface.
- 11. Temperature Inversion  Condition in which the temperature of the atmosphere increases with altitude in contrast to the normal decrease with altitude.  When temperature inversion occurs, cold air underlies warmer air at higher altitudes. Effects of Temperature Inversion  An inversion acts like a lid  This can cause several weather-related effects  Trapping of pollutants below the inversion which leads to develop significant amount of smog  Example: sunsets are very red  Another effect that an inversion has is to make clouds just below the inversion
- 12. Temperature Inversion in Mexico City Material on word doc Strategies made in Mexico http://www.dw.de/fighting-the-smog-in-mexico-city/a-17786567 Home Task Study climate graphs in atlases for four cities in different latitudes and relate temperatures to latitude.