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• Please sit together in pairs: – – – – – – – – – – Onyema and Jiayuan Alejandra and Erica Chris and John W. Ryan and Dian John F. and Michael Walter and Honglu Max and Matt Amanda and Lin Pauline and Anwen Jennifer and Mengyue – – – – Alexandra and Melissa David and Erich Abigael and Irfan Jake and Jason Phys Phys150 150 Lecture Lecture22 7 1 Announcements • Homework 10 is due on Sunday, April 14 at midnight. • Exam 2 is Thursday, April 18 in class. Covers Chapters 6-10. Phys 150 Lecture 22 16 2 Chapter 10 – Climate Change • IPCC – Intergovernmental Panel on Climate Change (UN) • UIUC connection: Professor Wuebbles (Atmosphere Science and ECE) • Charles Keeling: UIUC Chemistry degree (1948) Phys 150 Lecture 22 3 Chapter 10 – Climate Change • IPCC – Intergovernmental Panel on Climate Change (UN) • UIUC connection: Professor Wuebbles (Atmosphere Science and ECE) • Charles Keeling: UIUC Chemistry degree (1948) Phys 150 Lecture 22 4 i>clicker question Which of these are evidence for global warming? A. B. C. D. Rising surface temperature Rising sea level Melting snow and ice All of the above Phys 150 Lecture 22 5 i>clicker question Which of these are evidence for global warming? A. B. C. D. Rising surface temperature Rising sea level Melting snow and ice All of the above - However, this does not imply that the warming is caused by humans Phys 150 Lecture 22 6 IPCC 2007 Berkeley Earth 2/3 expansion, 1/3 melting ice Thermometer Phys 150 Lecture 22 7 i>clicker question Since 2000, the Earth’s temperature has A. B. C. D. increased at an accelerated rate increased not changed decreased Phys 150 Lecture 22 8 i>clicker question The very hot and dry summer we had is A. B. C. D. certainly due to global warming likely due to global warming perhaps due to global warming unrelated to global warming Phys 150 Lecture 22 9 i>clicker question The very hot and dry summer we had is A. B. C. D. certainly due to global warming likely due to global warming perhaps due to global warming unrelated to global warming “Climate change” - more extreme heat events Phys 150 Lecture 22 10 i>clicker question The IPCC claims that most of the global warming since 1950 is very likely due to A. B. C. D. E. natural solar cycles volcanic activity human-caused greenhouse gases All of the above None of the above Phys 150 Lecture 22 11 i>clicker question The IPCC claims that most of the global warming since 1950 is very likely due to A. B. C. D. E. natural solar cycles – cooling volcanic activity - cooling human-caused greenhouse gases All of the above None of the above Phys 150 Lecture 22 12 Phys 150 Lecture 22 13 i>clicker question The earth emits radiation into space primarily as A. B. C. D. visible light near infrared radiation mid infrared radiation ultraviolet radiation Phys 150 Lecture 22 14 i>clicker question The earth emits radiation into space primarily as A. B. C. D. visible light near infrared radiation mid infrared radiation ultraviolet radiation Phys 150 Lecture 22 IR camera 15 i>clicker question The most important greenhouse gas is A. B. C. D. water vapor carbon dioxide methane nitrous oxide Phys 150 Lecture 22 16 i>clicker question The most important greenhouse gas is A. B. C. D. water vapor carbon dioxide methane nitrous oxide Phys 150 Lecture 22 17 Phys 150 Lecture 22 18 i>clicker question During the last ice age, the Earth was colder by about A. B. C. D. 1F 5F 10 F 15 F Phys 150 Lecture 21 19 i>clicker question During the last ice age, the Earth was colder by about A. B. C. D. 1F 5F 10 F 15 F Phys 150 Lecture 21 20 Phys 150 Lecture 22 21 Phys 150 Lecture 22 22 i>clicker question The greenhouse effect warms the Earth by about A. B. C. D. 1F 2F 20 F 60 F Phys 150 Lecture 22 21 23 i>clicker question The greenhouse effect warms the Earth by about A. B. C. D. 1F 2F 20 F 60 F Phys 150 Lecture 22 21 24 Phys 150 Lecture 22 25