PPT-Chapter 4-Introduction While scientists continued to study the ozone layer, an University

Author : pamella-moone | Published Date : 2018-10-31

He estimated that Nitrogen oxides derived depletion of 1090 Nobody at that time knew what the stratospheres natural concentration of Nitrogen oxide was but even

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Chapter 4-Introduction While scientists continued to study the ozone layer, an University: Transcript

He estimated that Nitrogen oxides derived depletion of 1090 Nobody at that time knew what the stratospheres natural concentration of Nitrogen oxide was but even if you didnt know how much Nitrogen oxide there was its difficult to calculate its effect. Instructor Name:. . (Your Name. ). 2. CHAPTER. Learning Objectives. Describe the effects of CFCs . on . the world’s ozone layer.. Explain the Clean Air . Act.. Identify the pros and cons of CFCs, . Products. Fredric . Swarts. Early 1890s. Belgian chemist. Pioneer in synthesis of fluorinated alkanes. Generated effective fluorine exchange agent. Thomas . Midgley. Jr.. 1930s. Synthesized . dichlorofluoromethane. DEPLETION. What is Ozone?. Two different layers in the atmosphere:. . Troposphere. Stratosphere. . What is ozone layer?. Ozone layer is a thin, fragile shield that contains relatively high concentrations of ozone.. Layer. Depletion. “. Life’s Support System Depletion. ”. Outline of Presentation. What is the Ozone layer?. How is ozone created and destroyed?. What is the Ozone hole?. What are the causes of Ozone Depletion?. The . ozone layer. is a layer in . Earth's atmosphere. which contains relatively high concentrations of . ozone. (O. 3. ). . This layer absorbs 97–99% of the . Sun. 's high frequency . ultraviolet light. the progression of the Ozone hole over the antarctic from 1970 to 1997.. Some effects on plant and animal tissue as UV radiation increases. decrease in agricultural yields and a decrease in overall forest productivity. Tuesday, January 5. th. , 2015. Good up high, bad nearby. Troposphere:. Thinnest layer of atmosphere, 80% mass, almost all H. 2. O. 0.04 ppm O. 3. Stratosphere: 10 ppm O. 3. Characteristics of O. 3. Highly poisonous, strong odor, irritant, colorless gas. GLY 4241 - Lecture 6 . Fall, . 2016. 2. Earth. Even in a high resolution image from space, the atmosphere is not visible. 3. Radiation. NASA graphic. 4. Chinese Smog. Haze over China. Increased desertification has added dust to China’s atmosphere. The ozone layer is destroyed by ozone-depleting substances (ODS) when those chemicals are released into the atmosphere and then react with the ozone molecules. . Elevated ultraviolet radiation reaching the earth as a result of ozone depletion can have major impacts on life and nature, including skin cancer and cataracts and weakened immune systems. . The . ozone layer or ozone shield . is a region of Earth's stratosphere that absorbs most of the Sun's UV radiation. . It contains high concentration of ozone (O3).. It is a pale blue gas at room temperature.. Nitrous . Oxide (N. 2. O). : The Dominant Ozone-Depleting Substance Emitted in the 21. st. . Century, A. . R. . Ravishankara, John S. Daniel, and Robert W. . Portmann, . SCIENCE. , . Vol. . 326, Pages: 123-125, 2009 (OCT 2. Stratosphere. Ozone Concentration (ppm). SGC . Fig. 3-11. . OZONE: Sources. Ozone is produced naturally in photochemical reactions in the stratospheric ozone layer --“good ozone” -- is . decreasing. found?. The . ozone layer . is the layer of the atmosphere at an altitude of 15 to 40 km (stratosphere) . What is Ozone?. Ozone. . is a molecule made of three oxygen atoms. What is the function of the ozone layer. N. 2. O . under the. Vienna Convention for the Protection of the Ozone Layer and/or . Montreal Protocol on Substances that Deplete the Ozone Layer. Peter M. Grabiel. Institute for Governance & Sustainable Development (IGSD).

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