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Global Warming Will Human-Induced Climate Change Destroy the World? By Rich Deem www.GodAndScience.org Note: This slideshow is  NOT  meant to be printed. View in slideshow mode only because of extensive builds and animations. Go to the website for a printable copy. Requires  PowerPoint 2003 or PowerPoint Viewer 2003.
Introduction ,[object Object],[object Object],[object Object],[object Object]
History of Earth’s Climate ,[object Object],[object Object],[object Object],[object Object],[object Object]
History of Earth’s Climate ,[object Object],[object Object],[object Object],[object Object],[object Object]
Earth’s Temperature Sun Solar Energy Solar Energy
Earth’s Temperature Sun Solar Energy Radiative Cooling
Earth’s Temperature Sun Solar Energy Radiative Cooling
Earth’s Temperature Sun Solar Energy Radiative Cooling
Greenhouse Effect Sun
Earth’s Atmospheric Gases >99% <1% Non- Greenhouse Gases Greenhouse Gases Nitrogen (N 2 ) Oxygen (O 2 ) Water (H 2 O) Carbon Dioxide (CO 2 ) Methane (CH 4 ) Argon (Ar)
Runaway Greenhouse Effect ,[object Object],[object Object],[object Object],[object Object],Sun Venus
Carbon Dioxide
Carbon Dioxide Levels 170 220 270 320 370 420 200000 400000 600000 Time (YBP) CO 2  (ppm)  Vostok Ice Core Dome Concordia 0 Muana Loa Readings CO 2  Levels Since 1958 310 330 350 370 10 20 30 40 CO 2  (ppm)  0
Worldwide Carbon Emissions Carbon (10 9  metric tons) 0 1 2 3 4 5 6 7 8 1750 1800 1850 1900 1950 2000 Year Liquid fuel Total Gas fuel Solid fuel
Annual Carbon Emissions 1955 1965 1975 1985 1995 2005 0 4 6 8 2 Year Carbon (10 9  metric tons) Annual carbon emissions Atmospheric CO 2 Atmospheric CO 2  average
Future Carbon Dioxide Levels ,[object Object],[object Object],[object Object],[object Object],[object Object]
Kyoto Protocol ,[object Object],[object Object],[object Object]
Past Temperatures
Recorded Worldwide Temperatures -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1880 1900 1920 1940 1960 1980 2000 Year    Mean Temperature (°C) Flat Decreasing Flat
Historic Los Angeles Temperatures Winter Temperatures 10 11 12 13 14 15 16 17 1880 1900 1920 1940 1960 1980 2000 Year Summer Temperatures 18 19 20 21 22 23 24 25 1880 1900 1920 1940 1960 1980 2000 Year Annual Temperatures 15 16 17 18 19 20 21 22 1880 1900 1920 1940 1960 1980 2000 Year Temperature (°C)
2009 Temperature Changes Compared to 1951-1980 2009 Temperature Changes Compared to 1951-1980 -4.1 -4 -2 -1 -.5 -.2 .2 .5 1 2 4 4.1
Past Temperatures Measurement ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Temperature History of the Earth ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Main Ocean Currents Adapted from IPCC SYR Figure 4-2
Temperature History of the Earth ,[object Object],[object Object]
Orbital Parameters: Precession Perihelion Apehelion
Orbital Parameters: Obliquity 22.5 ° 24.5 °
Orbital Parameters: Eccentricity Minimum: 0.005 Maximum: 0.061 Not to scale! To Scale! Perihelion Apehelion Apehelion
Orbital Parameters & Earth’s Climate Age (kya) 1000 900 800 700 600 500 400 300 200 100 0 Eccentricity (100 ky) Temperature Obliquity (41 ky) Precession (22 ky)
Temperature History of the Earth ,[object Object],[object Object]
Younger Dryas Event -55 -50 -45 -40 -35 -30 -25 0 5 10 15 20 Age (kya) Temperature (°C) 0.05 0.10 0.15 0.20 0.25 0.30 0.35 Snow Accumulation (m/yr) Younger Dryas Little Ice Age Ice Age Medieval Warm
Younger Dryas Event -44 -43 -42 -41 -40 -39 -38 -37 -36 -35 -34  18 O (Greenland) -8.0 -7.5 -7.0 -6.5 -6.0 -5.5 -5.0 -4.5 -4.0 10 11 12 13 14 15 16  18 O (China) Younger Dryas Age (kya)
Temperature History of the Earth ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Temperature History of the Earth ,[object Object],[object Object],[object Object],[object Object],[object Object]
Temperature History of the Earth ,[object Object],[object Object],[object Object],[object Object],[object Object]
Temperature History of the Earth ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
A Compilation of Phanerozoic Atmospheric CO 2  Records Breecker D O et al. PNAS 2010;107:576-580 6000 5000 4000 3000 2000 1000 0 30 60 90 Atmospheric CO 2 Concentration (ppmV) Continental Glaciation (Paleolatitude) 400 300 200 100 0 Paleozoic Mesozoic Cenozoic S D Carb P Tr J K Pg Ng
Recent Temperature Changes
“Hockey Stick” Controversy 1000 1200 1400 1600 1800 2000 -0.8 Year -0.6 -0.4 -0.2 0 0.2 0.4 0.6 Temperature Change ( °C) Direct temperature measurements Mann et al. 1999
The Problem with Tree Rings 1000 1200 1400 1600 1800 2000 -0.6 Year -0.5 -0.4 -0.3 0 0.1 0.2 0.3 Temperature Change ( °C) -0.2 -0.1 Jones et al. 1998 Briffa et al. 1999 Mann et al. 1999
What Influences Tree Rings? ,[object Object],[object Object],[object Object]
Is the Hockey Stick Correct? Mann et al. 1999 Esper et al. 2002 800 1000 1200 1400 1600 1800 -2 -1 0 1 2 Temperature Change ( °C) 2000 Year
Is the Hockey Stick Correct? -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0 400 800 1200 1600 2000 Year Temperature Change (°C) Mann et al. 1999 Esper et al. 2002 Moberg et al. 2005 Mann et al. 2008 Medieval Warm Period
U.S. National Academy of Sciences: June 2006 1000 1200 1400 1600 1800 2000 -0.8 Year -0.6 -0.4 -0.2 0 0.2 0.4 0.6 Temperature Change ( °C) “ high level of confidence” “ 2:1 chance of being right”
Atmospheric Temperatures -1.0 -0.5 0.0 0.5 1.0 1.5 1980 1990 2000 Year -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1980 1990 2000 Year Temperature Cgange (°C) Troposphere Stratosphere
CO 2  Concentration Vs. Temperature 170 220 270 320 370 0 200000 400000 600000 Time (YBP) CO 2  (ppm) Antarctica  25 26 27 28 29 30 31 SST (°C) Tropical Pacific
Consequences of Global Warming
Global Warming Primarily Impacts the Northern Hemisphere -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1920 1960 2000 Year Temperature Change (°C) 1920 1960 2000 Year Northern vs. Southern Latitude Land vs. Ocean Northern Hemisphere Southern Hemisphere Land Ocean
2009 Temperature Changes Compared to 1951-1980 -4.1 -4 -2 -1 -.5 -.2 .2 .5 1 2 4 4.1
Ice Sheets Melting? ,[object Object],[object Object],[object Object],[object Object]
Melting Glaciers – Mt. Kilimanjaro
Changes in Antarctica Ice Mass  1000 800 600 400 200 0 -200 -400 -600 2003 2004 2005 Ice Mass (km 3 ) Year
Rise in Sea Levels? ,[object Object],[object Object],[object Object],[object Object]
Changing Sea Levels 1700 1750 1800 1850 1900 1950 2000 -20 -10 0 10 20 Relative Sea Level (cm) Adapted from IPCC SYR Figure 2-5 Amsterdam, Netherlands Brest, France Swinoujscie, Poland Global Temperature Change
Sea Levels for 450,000 Years Time (KYBP) Sea Level (m) 20 0 -20 -40 -60 -80 -100 -120 450 400 350 300 250 200 150 100 50 0 25 26 27 28 29 30 31 SST (°C) Tropical Pacific
Increase in Hurricanes? ,[object Object],[object Object],[object Object],[object Object],1860 1880 1900 1920 1940 1960 1980 2000 2020 0 5 10 15 Data Unreliable Scaled August-October Sea-Surface Temperature Adjusted Atlantic Storm Power Dissipation Index SST/SPDI (meters 3 /sec 2 )
How Much Temperature Increase? ,[object Object],[object Object],[object Object]
Wildlife Effects ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Effect on Humans ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Potential Worldwide Precipitation Changes -50 -20 -10 -5 5 10 20 50
Drought in Africa Lake Faguibine Lake Chad
Cost to Stabilize CO 2  Concentrations 450 550 650 750 1800 1600 1400 1200 1000 800 600 400 200 0 Carbon Dioxide (ppm) Cost (Trillons U.S. Dollars)
Possible Solutions to Global Warming
Mitigation of Global Warming ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Storage of CO 2  in Geological Formations ,[object Object],[object Object],[object Object],[object Object],Adapted from IPCC SRCCS Figure TS-7 3a 2 3b 1 4
Global Warming Myths
Global Warming Has Stopped? -0.2 0.0 0.2 0.4 0.6 0.8 1975 1980 1985 1990 1995 2000 2005 Year    Mean Temperature (°C) 2010 1365.2 1365.4 1365.6 1365.8 1366.0 1366.2 1366.4 1366.6 1366.8 Solar Irradiance (W/m 2 )
Volcanoes Put Out More CO 2  Than Fossil Fuel Burning 0 2 4 6 8 10 Carbon (10 9  metric tons) Fossil Fuel Volcanoes
Global Warming is Caused by Sunspots -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1880 1900 1920 1940 1960 1980 2000 Year    Mean Temperature (°C) 0 50 100 150 200 250 Sunspots
Hadley Temperatures Vs. Sunspots -2.0 -1.5 -1.0 -0.5 0.0 1.0 1.5 1750 1800 1850 1900 1950 2000 Year    Mean Temperature (°C) 0 50 100 150 200 250 Sunspots
Global Warming is Caused by GCR -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1950 1960 1970 1980 1990 2000 2010 Year    Mean Temperature (°C) 3000 3200 3400 3600 3800 4000 4200 4400 4600 Gamma Cosmic Rays
CO 2  Vs. Temperature CO 2  Vs. Sea Level 0 100000 200000 300000 400000 500000 Time (ybp) Rohling et al. 2009. Antarctic temperature and global sea level closely coupled over the last five glacial cycles.  Nature Geoscience  2:500. -120 -100 -80 -60 -40 -20 0 20 40 Relative Sea Level 180 200 220 240 260 280 300 320 CO 2   (ppmv) -10 -8 -6 -4 -2 0 2 4 6 Temperature
Global Warming is Due to Urban Heat Islands 2009 Temperature Changes Compared to 1951-1980 -4.1 -4 -2 -1 -.5 -.2 .2 .5 1 2 4 4.1
Mt. Kilimanjaro’ Glaciers are Melting Because of Global Warming
Global Warming Primarily Impacts the Northern Hemisphere -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1920 1960 2000 Year Temperature Change (°C) Northern vs. Southern Latitude Northern Hemisphere Southern Hemisphere 1920 1960 2000 Year Land vs. Ocean Land Ocean
Sea Levels Will Rise 5-6 ft? ,[object Object],[object Object],[object Object],[object Object],[object Object]
Changing Sea Levels 1700 1750 1800 1850 1900 1950 2000 -20 -10 0 10 20 Relative Sea Level (cm) Adapted from IPCC SYR Figure 2-5 Amsterdam, Netherlands Brest, France Swinoujscie, Poland Global Temperature Change
How Much Temperature Increase? ,[object Object],[object Object],[object Object]
Predictions Vs. Reality Hansen, J. 1988.  Journal Of Geophysical Research  93:9241. Exponential Increase in carbon emissions Moderate reduction in carbon emissions Drastic reduction in carbon emissions Observed temps through 1988  T (°C) 1.5 1.0 0.5 0 -0.4 Date 1960 1970 1980 1990 2000 2010 2019 Annual Mean  Global  Temperature  Change OBSERVED SCENARIO A SCENARIO B SCENARIO C
Temperature Extrapolation  T (°C) 1.5 1.0 0.5 0 -0.4 Date 1980 2000 2020 2040 2060 2080 2100 2.5 2.0 1960
Conclusions ,[object Object],[object Object],[object Object],[object Object]

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Global warming

  • 1. Global Warming Will Human-Induced Climate Change Destroy the World? By Rich Deem www.GodAndScience.org Note: This slideshow is NOT meant to be printed. View in slideshow mode only because of extensive builds and animations. Go to the website for a printable copy. Requires PowerPoint 2003 or PowerPoint Viewer 2003.
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  • 5. Earth’s Temperature Sun Solar Energy Solar Energy
  • 6. Earth’s Temperature Sun Solar Energy Radiative Cooling
  • 7. Earth’s Temperature Sun Solar Energy Radiative Cooling
  • 8. Earth’s Temperature Sun Solar Energy Radiative Cooling
  • 10. Earth’s Atmospheric Gases >99% <1% Non- Greenhouse Gases Greenhouse Gases Nitrogen (N 2 ) Oxygen (O 2 ) Water (H 2 O) Carbon Dioxide (CO 2 ) Methane (CH 4 ) Argon (Ar)
  • 11.
  • 13. Carbon Dioxide Levels 170 220 270 320 370 420 200000 400000 600000 Time (YBP) CO 2 (ppm) Vostok Ice Core Dome Concordia 0 Muana Loa Readings CO 2 Levels Since 1958 310 330 350 370 10 20 30 40 CO 2 (ppm) 0
  • 14. Worldwide Carbon Emissions Carbon (10 9 metric tons) 0 1 2 3 4 5 6 7 8 1750 1800 1850 1900 1950 2000 Year Liquid fuel Total Gas fuel Solid fuel
  • 15. Annual Carbon Emissions 1955 1965 1975 1985 1995 2005 0 4 6 8 2 Year Carbon (10 9 metric tons) Annual carbon emissions Atmospheric CO 2 Atmospheric CO 2 average
  • 16.
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  • 19. Recorded Worldwide Temperatures -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1880 1900 1920 1940 1960 1980 2000 Year  Mean Temperature (°C) Flat Decreasing Flat
  • 20. Historic Los Angeles Temperatures Winter Temperatures 10 11 12 13 14 15 16 17 1880 1900 1920 1940 1960 1980 2000 Year Summer Temperatures 18 19 20 21 22 23 24 25 1880 1900 1920 1940 1960 1980 2000 Year Annual Temperatures 15 16 17 18 19 20 21 22 1880 1900 1920 1940 1960 1980 2000 Year Temperature (°C)
  • 21. 2009 Temperature Changes Compared to 1951-1980 2009 Temperature Changes Compared to 1951-1980 -4.1 -4 -2 -1 -.5 -.2 .2 .5 1 2 4 4.1
  • 22.
  • 23.
  • 24. Main Ocean Currents Adapted from IPCC SYR Figure 4-2
  • 25.
  • 26. Orbital Parameters: Precession Perihelion Apehelion
  • 27. Orbital Parameters: Obliquity 22.5 ° 24.5 °
  • 28. Orbital Parameters: Eccentricity Minimum: 0.005 Maximum: 0.061 Not to scale! To Scale! Perihelion Apehelion Apehelion
  • 29. Orbital Parameters & Earth’s Climate Age (kya) 1000 900 800 700 600 500 400 300 200 100 0 Eccentricity (100 ky) Temperature Obliquity (41 ky) Precession (22 ky)
  • 30.
  • 31. Younger Dryas Event -55 -50 -45 -40 -35 -30 -25 0 5 10 15 20 Age (kya) Temperature (°C) 0.05 0.10 0.15 0.20 0.25 0.30 0.35 Snow Accumulation (m/yr) Younger Dryas Little Ice Age Ice Age Medieval Warm
  • 32. Younger Dryas Event -44 -43 -42 -41 -40 -39 -38 -37 -36 -35 -34  18 O (Greenland) -8.0 -7.5 -7.0 -6.5 -6.0 -5.5 -5.0 -4.5 -4.0 10 11 12 13 14 15 16  18 O (China) Younger Dryas Age (kya)
  • 33.
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  • 36.
  • 37. A Compilation of Phanerozoic Atmospheric CO 2 Records Breecker D O et al. PNAS 2010;107:576-580 6000 5000 4000 3000 2000 1000 0 30 60 90 Atmospheric CO 2 Concentration (ppmV) Continental Glaciation (Paleolatitude) 400 300 200 100 0 Paleozoic Mesozoic Cenozoic S D Carb P Tr J K Pg Ng
  • 39. “Hockey Stick” Controversy 1000 1200 1400 1600 1800 2000 -0.8 Year -0.6 -0.4 -0.2 0 0.2 0.4 0.6 Temperature Change ( °C) Direct temperature measurements Mann et al. 1999
  • 40. The Problem with Tree Rings 1000 1200 1400 1600 1800 2000 -0.6 Year -0.5 -0.4 -0.3 0 0.1 0.2 0.3 Temperature Change ( °C) -0.2 -0.1 Jones et al. 1998 Briffa et al. 1999 Mann et al. 1999
  • 41.
  • 42. Is the Hockey Stick Correct? Mann et al. 1999 Esper et al. 2002 800 1000 1200 1400 1600 1800 -2 -1 0 1 2 Temperature Change ( °C) 2000 Year
  • 43. Is the Hockey Stick Correct? -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0 400 800 1200 1600 2000 Year Temperature Change (°C) Mann et al. 1999 Esper et al. 2002 Moberg et al. 2005 Mann et al. 2008 Medieval Warm Period
  • 44. U.S. National Academy of Sciences: June 2006 1000 1200 1400 1600 1800 2000 -0.8 Year -0.6 -0.4 -0.2 0 0.2 0.4 0.6 Temperature Change ( °C) “ high level of confidence” “ 2:1 chance of being right”
  • 45. Atmospheric Temperatures -1.0 -0.5 0.0 0.5 1.0 1.5 1980 1990 2000 Year -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1980 1990 2000 Year Temperature Cgange (°C) Troposphere Stratosphere
  • 46. CO 2 Concentration Vs. Temperature 170 220 270 320 370 0 200000 400000 600000 Time (YBP) CO 2 (ppm) Antarctica 25 26 27 28 29 30 31 SST (°C) Tropical Pacific
  • 48. Global Warming Primarily Impacts the Northern Hemisphere -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1920 1960 2000 Year Temperature Change (°C) 1920 1960 2000 Year Northern vs. Southern Latitude Land vs. Ocean Northern Hemisphere Southern Hemisphere Land Ocean
  • 49. 2009 Temperature Changes Compared to 1951-1980 -4.1 -4 -2 -1 -.5 -.2 .2 .5 1 2 4 4.1
  • 50.
  • 51. Melting Glaciers – Mt. Kilimanjaro
  • 52. Changes in Antarctica Ice Mass 1000 800 600 400 200 0 -200 -400 -600 2003 2004 2005 Ice Mass (km 3 ) Year
  • 53.
  • 54. Changing Sea Levels 1700 1750 1800 1850 1900 1950 2000 -20 -10 0 10 20 Relative Sea Level (cm) Adapted from IPCC SYR Figure 2-5 Amsterdam, Netherlands Brest, France Swinoujscie, Poland Global Temperature Change
  • 55. Sea Levels for 450,000 Years Time (KYBP) Sea Level (m) 20 0 -20 -40 -60 -80 -100 -120 450 400 350 300 250 200 150 100 50 0 25 26 27 28 29 30 31 SST (°C) Tropical Pacific
  • 56.
  • 57.
  • 58.
  • 59.
  • 60. Potential Worldwide Precipitation Changes -50 -20 -10 -5 5 10 20 50
  • 61. Drought in Africa Lake Faguibine Lake Chad
  • 62. Cost to Stabilize CO 2 Concentrations 450 550 650 750 1800 1600 1400 1200 1000 800 600 400 200 0 Carbon Dioxide (ppm) Cost (Trillons U.S. Dollars)
  • 63. Possible Solutions to Global Warming
  • 64.
  • 65.
  • 67. Global Warming Has Stopped? -0.2 0.0 0.2 0.4 0.6 0.8 1975 1980 1985 1990 1995 2000 2005 Year  Mean Temperature (°C) 2010 1365.2 1365.4 1365.6 1365.8 1366.0 1366.2 1366.4 1366.6 1366.8 Solar Irradiance (W/m 2 )
  • 68. Volcanoes Put Out More CO 2 Than Fossil Fuel Burning 0 2 4 6 8 10 Carbon (10 9 metric tons) Fossil Fuel Volcanoes
  • 69. Global Warming is Caused by Sunspots -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1880 1900 1920 1940 1960 1980 2000 Year  Mean Temperature (°C) 0 50 100 150 200 250 Sunspots
  • 70. Hadley Temperatures Vs. Sunspots -2.0 -1.5 -1.0 -0.5 0.0 1.0 1.5 1750 1800 1850 1900 1950 2000 Year  Mean Temperature (°C) 0 50 100 150 200 250 Sunspots
  • 71. Global Warming is Caused by GCR -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1950 1960 1970 1980 1990 2000 2010 Year  Mean Temperature (°C) 3000 3200 3400 3600 3800 4000 4200 4400 4600 Gamma Cosmic Rays
  • 72. CO 2 Vs. Temperature CO 2 Vs. Sea Level 0 100000 200000 300000 400000 500000 Time (ybp) Rohling et al. 2009. Antarctic temperature and global sea level closely coupled over the last five glacial cycles. Nature Geoscience 2:500. -120 -100 -80 -60 -40 -20 0 20 40 Relative Sea Level 180 200 220 240 260 280 300 320 CO 2 (ppmv) -10 -8 -6 -4 -2 0 2 4 6 Temperature
  • 73. Global Warming is Due to Urban Heat Islands 2009 Temperature Changes Compared to 1951-1980 -4.1 -4 -2 -1 -.5 -.2 .2 .5 1 2 4 4.1
  • 74. Mt. Kilimanjaro’ Glaciers are Melting Because of Global Warming
  • 75. Global Warming Primarily Impacts the Northern Hemisphere -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1920 1960 2000 Year Temperature Change (°C) Northern vs. Southern Latitude Northern Hemisphere Southern Hemisphere 1920 1960 2000 Year Land vs. Ocean Land Ocean
  • 76.
  • 77. Changing Sea Levels 1700 1750 1800 1850 1900 1950 2000 -20 -10 0 10 20 Relative Sea Level (cm) Adapted from IPCC SYR Figure 2-5 Amsterdam, Netherlands Brest, France Swinoujscie, Poland Global Temperature Change
  • 78.
  • 79. Predictions Vs. Reality Hansen, J. 1988. Journal Of Geophysical Research 93:9241. Exponential Increase in carbon emissions Moderate reduction in carbon emissions Drastic reduction in carbon emissions Observed temps through 1988  T (°C) 1.5 1.0 0.5 0 -0.4 Date 1960 1970 1980 1990 2000 2010 2019 Annual Mean Global Temperature Change OBSERVED SCENARIO A SCENARIO B SCENARIO C
  • 80. Temperature Extrapolation  T (°C) 1.5 1.0 0.5 0 -0.4 Date 1980 2000 2020 2040 2060 2080 2100 2.5 2.0 1960
  • 81.