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A Brief History of Earth’s Climate Change Invited Talk Youth Leadership Dialogue Australian American Leadership Dialogue Stanford University January 13, 2010 Dr. Larry Smarr Director, California Institute for Telecommunications and Information Technology Harry E. Gruber Professor,  Dept. of Computer Science and Engineering Jacobs School of Engineering, UCSD
Houston, We Have a Problem… www.columbia.edu/~jeh1/mailings/2009/20091216_TemperatureOfScience.pdf
Annual and Decadal Mean Temperature Anomalies  for Australia Five Decades of Mean Temperature Rise
Australia, the U.S., and Canada Share a Problem: Top 3  Developed Countries For Per Capita GHG Emission http://en.wikipedia.org/wiki/File:GHG_per_capita_2000.svg “ Australia’s Total Emissions Exceed Those of France and Italy” --Australia Institute
The Unrelenting Climb of CO 2
History, cont. (4, WH) 1965: White House document 
The Planet is Already Committed  to a Dangerous Level of Warming Temperature Threshold Range  that Initiates the Climate-Tipping V. Ramanathan and Y. Feng, Scripps Institution of Oceanography, UCSD September 23, 2008 www.pnas.org/content/105/38/14245.full.pdf+html Additional Warming over 1750 Level Earth Has Only Realized 1/3 of the Committed Warming - Future Emissions  of Greenhouse Gases  Move Peak to the Right
Global Climatic Disruption Early Signs: Arctic Summer Ice is Rapidly Decreasing "We are almost out of multiyear sea ice in the northern hemisphere--I've never seen anything like this in my 30 years of working in the high Arctic.” --David Barber, Canada's Research Chair in Arctic System Science at the University of Manitoba October 29, 2009 http://news.cnet.com/8301-11128_3-10213891-54.html http://news.yahoo.com/s/nm/20091029/sc_nm/us_climate_canada_arctic_1
Arctic Summer Ice Melting Accelerating Relative to IPCC 2007 Predictions
 
Rapid Increase in the Greenhouse Gas CO 2 Since Industrial Era Began Little  Ice Age Medieval  Warm  Period 388 ppm in 2010
Examining Natural Climate Change: 1000s of Years Little Ice Age Medieval Warm Period Mann, et al., PNAS 105, 13252–13257 (2008)
The Little Ice Age: The Climate State Earth is Emerging From The Frozen Thames, 1677 At Jamestown, the colonists had the bad fortune to arrive at the height  of the driest seven-year period in 770 years.  No fewer than 4,800 of the 6,000 settlers who arrived between 1607 and 1625 perished. -- The Little Ice Age, Brian Fagan http://reference.findtarget.com/search/Little%20Ice%20Age/
The Medieval Warm Period Last Time Global Temperatures Were This High A 300 Year California Megadrought: “ Precipitation was <60% of normal  between 950-1250 AD. Several trees were radiocarbon dated to ~1250 AD and are positioned upslope a ~ 60 meter deep submerged paleoshoreline.   --Daniel Brothers Ph.D. Thesis UCSD SIO Dec 2009 Lake Tahoe— Largest Alpine Lake in North America But CO 2  was <290ppm; Today ~390ppm
Slow Small Variation in Atmospheric CO 2 During Civilization Period Elsig, et al. Nature 461, 507-510 (Sept. 2009) Today 388 ppm Previous  Graph
The Earth is Warming Over 100 Times Faster Today Than During the Last Ice Age Warming! http://scrippsco2.ucsd.edu/program_history/keeling_curve_lessons.html Monnin, et al., Science v. 291 pp. 112-114, Jan. 5, 2001. CO 2  Rose From  185 to 265ppm (80ppm)  in 6000 years or  1.33 ppm per Century CO 2  Has Risen From  335 to 385ppm (50ppm)  in 30 years or  1.6 ppm per Year
Sudden Flip-Flops--an Unavoidable Element of Climate:  The Younger Dryas Episode Richard Alley, Scientific American, Nov 2004
Abrupt Climate Change Can Be Very Swift
 
Our Last 10,000 Years Have Been Unusually Stable -- Abrupt Climate Change Has Been the Norm Richard Alley, The Two Mile Time Machine (2000), page 119 Holocene YD Last Ice Age
Antarctic Ice Cores Show CO 2  and Temperature  Have Oscillated For 800,000 Years in a Narrow Range Vertical Range  170 to 300 ppm Ice Cores: Luthi, et al. Nature may 15, 2008 v. 453 pp379-82 Today 388- Homonid Images:  The Last Human , G.J. Sawyer and V. Deak Homo Sapiens Homo Erectus
Future Estimates of CO 2  Emissions From Energy:  An Aggressive CO 2  Emission Reduction Scenario  www-static.shell.com/static/public/downloads/brochures/corporate_pkg/scenarios/shell_energy_scenarios_2050.pdf Estimated CO 2  Level in  2100 is 550ppm China India “ China and India resisted signing up for a global goal of halving greenhouse gas emissions by 2050.” — Reuters July 8, 2009 Current CO 2  Level is 388 ppm
Ice Core Record Has Been Extended Using Plankton: Today’s CO 2  is Higher Than in Last 2 Million Years! CO2: Hönisch, et al. Science 19 June 2009 Vol. 324. pp. 1551 - 1554 Homonid Images:  The Last Human , G.J. Sawyer and V. Deak 350 400 450 500 550 Today’s CO 2  Level Possible Level by 2100, Shell “Blueprints” Scenario  Homo Habilis
Earth’s Climate Hasn’t Seen the Current Level of CO 2   During the Entire Evolution of Homonids! Estimates of Cenozoic atmospheric pCO 2  based on two independent proxies as measured in subtropical deep-sea sediment cores from the Pacific CO 2 : James Zachos, et al. Science v. 292 p. 686 27 Apr. 2001 With No Policy Change, MIT Estimates ~900ppm by 2100 Homonid Images:  The Last Human , G.J. Sawyer and V. Deak Current CO 2  Level 550 ppm 900 ppm Australopithecus afarensis Sahelanthropus tchadensis
Earth’s Climate is Rapidly Entering a Novel Realm Not Experienced for Over 20 Million Years ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],See Video Lecture: http://greenmonk.net/john-holdren-on-global-climatic-disruption/
 
The Latest Science on Global Climatic Disruption An Update to the 2007 IPCC Report www.copenhagendiagnosis.org
My Recommendations for Further Reading
What is Creating the Problem  and What Can the World Do to Change? “ It Will Be the Biggest Single Peacetime Project Humankind Will Have Ever Undertaken”

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A Brief History of Earth’s Climate Change

  • 1. A Brief History of Earth’s Climate Change Invited Talk Youth Leadership Dialogue Australian American Leadership Dialogue Stanford University January 13, 2010 Dr. Larry Smarr Director, California Institute for Telecommunications and Information Technology Harry E. Gruber Professor, Dept. of Computer Science and Engineering Jacobs School of Engineering, UCSD
  • 2. Houston, We Have a Problem… www.columbia.edu/~jeh1/mailings/2009/20091216_TemperatureOfScience.pdf
  • 3. Annual and Decadal Mean Temperature Anomalies for Australia Five Decades of Mean Temperature Rise
  • 4. Australia, the U.S., and Canada Share a Problem: Top 3 Developed Countries For Per Capita GHG Emission http://en.wikipedia.org/wiki/File:GHG_per_capita_2000.svg “ Australia’s Total Emissions Exceed Those of France and Italy” --Australia Institute
  • 6. History, cont. (4, WH) 1965: White House document 
  • 7. The Planet is Already Committed to a Dangerous Level of Warming Temperature Threshold Range that Initiates the Climate-Tipping V. Ramanathan and Y. Feng, Scripps Institution of Oceanography, UCSD September 23, 2008 www.pnas.org/content/105/38/14245.full.pdf+html Additional Warming over 1750 Level Earth Has Only Realized 1/3 of the Committed Warming - Future Emissions of Greenhouse Gases Move Peak to the Right
  • 8. Global Climatic Disruption Early Signs: Arctic Summer Ice is Rapidly Decreasing &quot;We are almost out of multiyear sea ice in the northern hemisphere--I've never seen anything like this in my 30 years of working in the high Arctic.” --David Barber, Canada's Research Chair in Arctic System Science at the University of Manitoba October 29, 2009 http://news.cnet.com/8301-11128_3-10213891-54.html http://news.yahoo.com/s/nm/20091029/sc_nm/us_climate_canada_arctic_1
  • 9. Arctic Summer Ice Melting Accelerating Relative to IPCC 2007 Predictions
  • 10.  
  • 11. Rapid Increase in the Greenhouse Gas CO 2 Since Industrial Era Began Little Ice Age Medieval Warm Period 388 ppm in 2010
  • 12. Examining Natural Climate Change: 1000s of Years Little Ice Age Medieval Warm Period Mann, et al., PNAS 105, 13252–13257 (2008)
  • 13. The Little Ice Age: The Climate State Earth is Emerging From The Frozen Thames, 1677 At Jamestown, the colonists had the bad fortune to arrive at the height of the driest seven-year period in 770 years. No fewer than 4,800 of the 6,000 settlers who arrived between 1607 and 1625 perished. -- The Little Ice Age, Brian Fagan http://reference.findtarget.com/search/Little%20Ice%20Age/
  • 14. The Medieval Warm Period Last Time Global Temperatures Were This High A 300 Year California Megadrought: “ Precipitation was <60% of normal between 950-1250 AD. Several trees were radiocarbon dated to ~1250 AD and are positioned upslope a ~ 60 meter deep submerged paleoshoreline. --Daniel Brothers Ph.D. Thesis UCSD SIO Dec 2009 Lake Tahoe— Largest Alpine Lake in North America But CO 2 was <290ppm; Today ~390ppm
  • 15. Slow Small Variation in Atmospheric CO 2 During Civilization Period Elsig, et al. Nature 461, 507-510 (Sept. 2009) Today 388 ppm Previous Graph
  • 16. The Earth is Warming Over 100 Times Faster Today Than During the Last Ice Age Warming! http://scrippsco2.ucsd.edu/program_history/keeling_curve_lessons.html Monnin, et al., Science v. 291 pp. 112-114, Jan. 5, 2001. CO 2 Rose From 185 to 265ppm (80ppm) in 6000 years or 1.33 ppm per Century CO 2 Has Risen From 335 to 385ppm (50ppm) in 30 years or 1.6 ppm per Year
  • 17. Sudden Flip-Flops--an Unavoidable Element of Climate: The Younger Dryas Episode Richard Alley, Scientific American, Nov 2004
  • 18. Abrupt Climate Change Can Be Very Swift
  • 19.  
  • 20. Our Last 10,000 Years Have Been Unusually Stable -- Abrupt Climate Change Has Been the Norm Richard Alley, The Two Mile Time Machine (2000), page 119 Holocene YD Last Ice Age
  • 21. Antarctic Ice Cores Show CO 2 and Temperature Have Oscillated For 800,000 Years in a Narrow Range Vertical Range 170 to 300 ppm Ice Cores: Luthi, et al. Nature may 15, 2008 v. 453 pp379-82 Today 388- Homonid Images: The Last Human , G.J. Sawyer and V. Deak Homo Sapiens Homo Erectus
  • 22. Future Estimates of CO 2 Emissions From Energy: An Aggressive CO 2 Emission Reduction Scenario www-static.shell.com/static/public/downloads/brochures/corporate_pkg/scenarios/shell_energy_scenarios_2050.pdf Estimated CO 2 Level in 2100 is 550ppm China India “ China and India resisted signing up for a global goal of halving greenhouse gas emissions by 2050.” — Reuters July 8, 2009 Current CO 2 Level is 388 ppm
  • 23. Ice Core Record Has Been Extended Using Plankton: Today’s CO 2 is Higher Than in Last 2 Million Years! CO2: Hönisch, et al. Science 19 June 2009 Vol. 324. pp. 1551 - 1554 Homonid Images: The Last Human , G.J. Sawyer and V. Deak 350 400 450 500 550 Today’s CO 2 Level Possible Level by 2100, Shell “Blueprints” Scenario Homo Habilis
  • 24. Earth’s Climate Hasn’t Seen the Current Level of CO 2 During the Entire Evolution of Homonids! Estimates of Cenozoic atmospheric pCO 2 based on two independent proxies as measured in subtropical deep-sea sediment cores from the Pacific CO 2 : James Zachos, et al. Science v. 292 p. 686 27 Apr. 2001 With No Policy Change, MIT Estimates ~900ppm by 2100 Homonid Images: The Last Human , G.J. Sawyer and V. Deak Current CO 2 Level 550 ppm 900 ppm Australopithecus afarensis Sahelanthropus tchadensis
  • 25.
  • 26.  
  • 27. The Latest Science on Global Climatic Disruption An Update to the 2007 IPCC Report www.copenhagendiagnosis.org
  • 28. My Recommendations for Further Reading
  • 29. What is Creating the Problem and What Can the World Do to Change? “ It Will Be the Biggest Single Peacetime Project Humankind Will Have Ever Undertaken”