1 / 9

21/10/2010

21/10/2010. The Global Heat Budget. reflected by clouds and dust, water vapour and other gases in the atmosphere. Solar Insolation. 100%. 26%. 19%. absorbed by clouds and dust, water vapour and other gases in the atmosphere. 55%. reflected by surface. 4%. absorbed by surface. 51%.

duer
Download Presentation

21/10/2010

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 21/10/2010 The Global Heat Budget

  2. reflected by clouds and dust, water vapour and other gases in the atmosphere Solar Insolation 100% 26% 19% absorbed by clouds and dust, water vapour and other gases in the atmosphere 55% reflected by surface 4% absorbed by surface 51%

  3. Solar Insolation 100% solar insolation 26% reflected by atmosphere TOTAL ALBEDO = 26 + 4 = 30% 19% absorbed by atmosphere ALBEDO = REFLECTIVENESS 55% reaches surface TOTAL ABSORPTION = 19 + 51 = 70% 4% reflected by surface 51% absorbed by surface

  4. Tasks: • Copy figure 2.2 into your jotter. • Answer all of question 3 on page 32

  5. Energy Receipt and Latitude Need to be able to: • Describe variations in the amount of solar energy reaching the earth’s surface by latitude. • Explain which areas of the world (by latitude) receive more solar energy and the reasons why.

  6. Exam Question - 2002 With the aid of an annotated diagram of the earth, describe and explain the latitudinal variation of the Earth’s energy balance? Use Figure 2.3 on page 7 to help What is this question asking? • DESCRIBE the variation in solar energy at different latitudes – notably the tropics and polar regions • EXPLAIN why this variation occurs – i.e. why does what you are saying to the first part of the question actually happen

  7. Energy Receipt and Latitude Tasks: • Make a neat copy of diagram 2.4 and label it. • Study figure 2.3 describe the areas of energy surplus and deficit. • Using page 6 give 3 reasons why there is a net gain of energy in the low tropics. • Find 3 reasons why the poles are an area of energy deficit.

  8. ENERGY SURPLUS and DEFICIT • The Earth's atmosphere is put into motion because of the differential heating of the Earth’s surface by solar insolation. • The Poles receive less heat than the Tropics because: • Insolation has to pass through more of the Earth’s atmosphere • The angle of incidence of insolation • Higher levels of surface albedo.

  9. 3 2 1 IT IS VERY IMPORTANT TO PRACTICE / LEARN A VERSION OF THIS DIAGRAM Insolation has to pass through more of the Earth’s atmosphere 1 The angle of incidence of insolation - energy is spread out over a larger area because the sun’s rays strike the surface at a lower angle. 2 3 Higher levels of surface albedo - the ice-cap reflects more solar insolation

More Related