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Forest, Carbon, Climate Myths

Oregon Wild
Oregon Wild Conservation and Restoration Coordinator

This presentation debunks many of the common misconceptions about forests, carbon, and climate change. [A few of the slides did not convert very well. Contact me at dh@oregonwild.org if you want me to send you a link to the latest powerpoint.]

Forest, Carbon, Climate Myths

Oregon Wild
Oregon Wild Conservation and Restoration Coordinator

This presentation debunks many of the common misconceptions about forests, carbon, and climate change. [A few of the slides did not convert very well. Contact me at dh@oregonwild.org if you want me to send you a link to the latest powerpoint.]

Forest, Carbon, Climate Myths

1 of 67
Myths & Facts… Forests,  Carbon, and  Global Warming Doug Heiken
O r e g o n  W i l d (formerly Oregon Natural Resources Council) Mission : To protect and restore Oregon’s wildlands, wildlife, and water as an enduring legacy. Goal : To permanently protect roadless areas and old-growth forest ecosystems. Problem: Climate change threatens forests.   Conserving forests will store carbon and help alleviate a clear threat to earth’s climate and to the forests themselves.
Let’s Face Reality … ,[object Object],[object Object],[object Object],[object Object]
Forests Really Are the Lungs of the Planet Watch the Planetary Biosphere Breathe Keeling Curve , http://heartspring.net/images/atmospheric_carbon_dioxide.gif
The Essence of Life: Constructing and Deconstructing Carbon Chains Glucose and cellulose are built through  photosynthesis  and broken down to CO 2  by  respiration  and  combustion .
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Understanding forest carbon flows

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Forest, Carbon, Climate Myths

  • 1. Myths & Facts… Forests, Carbon, and Global Warming Doug Heiken
  • 2. O r e g o n W i l d (formerly Oregon Natural Resources Council) Mission : To protect and restore Oregon’s wildlands, wildlife, and water as an enduring legacy. Goal : To permanently protect roadless areas and old-growth forest ecosystems. Problem: Climate change threatens forests. Conserving forests will store carbon and help alleviate a clear threat to earth’s climate and to the forests themselves.
  • 3.
  • 4. Forests Really Are the Lungs of the Planet Watch the Planetary Biosphere Breathe Keeling Curve , http://heartspring.net/images/atmospheric_carbon_dioxide.gif
  • 5. The Essence of Life: Constructing and Deconstructing Carbon Chains Glucose and cellulose are built through photosynthesis and broken down to CO 2 by respiration and combustion .
  • 6.
  • 7. Systems View: Input-Output Model Ecosystem Carbon Pool: Live trees, dead wood, soil, forest products Carbon Output to Atmosphere: Decomposition, respiration, combustion Carbon Input to Forest: photosynthesis, length of growing season The size of the forest carbon pool is determined by the rate of carbon input relative to output over time
  • 8. Forest Carbon Storage Following Disturbance
  • 9. Forest Carbon Storage Following Disturbance clearcut
  • 10. Disturbance Frequency Affects Carbon Storage
  • 11.
  • 12.
  • 13.
  • 14. Photosynthesis still happens in old forests.
  • 15. Old forests store lots of carbon.
  • 16. “ Dead trees don’t go to heaven.” Olga Krankina
  • 17.
  • 18. Where did the carbon go?
  • 19. WOOD PRODUCTS MYTH: It’s better to store carbon in wood products, rather than in forests. —————————————— Example: "Carbon stays trapped in the wood, locked in the lumber ….“* Reality: Carbon is stored more securely in long-lived forests than in short-lived wood products. * California Forests Magazine, Winter 2006, http://calforests.org/media/enhanced/Winter06-CalForest-FINAL.pdf
  • 20. Ingerson, Ann L. 2007. U.S. Forest Carbon and Climate Change. Washington, D.C.: The Wilderness Society. Only a small fraction of forest carbon is stored in wood products. Logging transfers most of the carbon in the forest to the atmosphere as logging slash, mill waste, and processing emissions. Only 15% net storage!
  • 21. Carbon is stored for hundreds of years here.
  • 22. Carbon may be stored for a few years here.
  • 23. or stored for a some months here…
  • 24. HARVEST MYTH: Timber harvest “absorbs” carbon. Source: California Forest Products Commission. Modern Forestry & Climate Change.
  • 25. Ingerson, Ann L. 2007. U.S. Forest Carbon and Climate Change. Washington, D.C.: The Wilderness Society. Reality: logging emits carbon. Just follow the arrows from harvest back to the atmosphere.
  • 26. Reality: Carbon is more secure in live trees . . . rather than dead trees. Logging kills trees, stops photosynthesis, starves the soil foodweb.
  • 27. Reality: Carbon is safer when protected by tree bark … Living trees have an arsenal of defenses that help keep carbon safe from decay, insects, and fire. rather than paint.
  • 28. Reality: Carbon is safer in big pieces of wood Logging fragments large wood and increases surface area exposed to microbial decomposition. . . . rather than small.
  • 29. Reducing canopy cover warms the soil surface and increases the rate of decomposition. Reality: Carbon is more secure in a cool forest . . . rather than a warm forest.
  • 30. Reality: Logging debris is burned, emitting carbon.
  • 31. Summary: Long-lived forests store carbon better … . . . than short-lived wood products.
  • 32. FIRE MYTH: Forests are not good places to store carbon because forest fires release stored carbon through combustion. ———————————— Example: “When a tree burns it releases all the carbon it previously stored.”* * California Forest Products Commission. Modern Forestry & Climate Change.
  • 33. Reality: Many forests are maintained by fire.
  • 34. Some trees die … … so that others may live long and grow large. Fire is an essential ecological process that helps forests stay healthy.
  • 35. Reality: Fires occur in limited areas for a limited time , while photosynthesis dominates everywhere else. Places that don’t burn absorb more carbon than is released by the places that do burn.
  • 36. Reality: Fires emit far less carbon than logging. Wayburn, Laurie A., et al. 2000. Forest Carbon in the United States: Opportunities & Options for Private Lands. San Francisco: Pacific Forest Trust.
  • 37. Reality: Most carbon remains on site after fire. Large dead trees can last for many decades.
  • 38. Reality: Fire creates charcoal, a stable form of carbon often incorporated into the soil.
  • 39. Worst case: Fire + logging = carbon desert
  • 40. TROPICAL FOREST MYTH: Forests outside the tropics are unimportant, because they do not contribute significantly to global carbon storage. —————————————— Reality: Pacific NW temperate rainforests can attain the greatest biomass per acre of any ecosystem on earth. Temperate and boreal forests are very extensive and currently serve as net carbon sinks.
  • 42. Global Forest Carbon Density Kindermann, et al. 2008. Global cost estimates of reducing carbon emissions through avoided deforestation. Proceedings of the National Academy of Science. July 29, 2008. vol. 105(30) pp 10302–10307. http://www.pnas.org/content/105/30/10302.full.pdf
  • 44. ALBEDO MYTH: Forests are dark green, so they exacerbate global warming by absorbing rather than reflecting the sun's energy.
  • 45.
  • 46. Reality: The tension between albedo and carbon storage is most relevant in boreal areas where forests are replaced by snow for long periods. Albedo is not a big issue in the low elevation temperate forests of the Pacific Northwest that are green virtually all the time.
  • 47. Reality: Forests also have a cooling effect through cloud formation. Forests transpire a lot of water and emit “cloud condensation nuclei” which helps create reflective clouds that increase albedo.
  • 48. THE “DOOMSDAY” MYTH: Protecting forests won’t help because climate change will be so extreme, causing forests to release large amounts of carbon due to stress and disturbance. http://www.x-cd.com/mcss04/S01a.pdf
  • 49. Forests will first … “ Green Up” Then … “ Brown Down” Fire Insects Drought Longer growing seasons Drought tolerance CO 2 fertilization Reality: Many forests may thrive before they decline .
  • 50. The CO 2 enriched atmosphere makes some trees more drought tolerant. With more CO 2 in the air, plants quickly get their fill of carbon, then actively close their stomata which reduces water loss.
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  • 54. METHANE MYTH: Allowing wood to rot in the forest releases methane (CH 4 ) with a warming potential 23 times greater than CO 2 . ——————————— Reality: Allowing wood to rot in the forest is no worse than wood products that rot in our cities and oxygen-starved landfills.
  • 55. SUBSTITUTION MYTH: Using more wood products reduces carbon emissions because it substitutes for carbon-intensive building materials such as steel and cement. ————————————— Reality: Substitution is speculative at best because it takes more than a century to off-set the carbon emissions caused by logging mature forests. At best, using wood slightly delays fossil fuel use.
  • 56. Ingerson, Ann L. 2007. U.S. Forest Carbon and Climate Change. Washington, D.C.: The Wilderness Society. The alleged value of substituting wood products for steel and concrete.
  • 57. But if we start from a native forest instead of a clearcut… It takes a very long time for substitution to off-set the carbon deficit caused by logging native forests. What discount rate do we apply?
  • 58.
  • 59. Climate change will be slow. Forests will make a smooth transition to a new equilibrium. ————————————— - Reality: Accelerating climate change will increase disequilibrium between the climate and biosphere. Reorganization of ecosystems will sometimes be rapid and chaotic. Ecosystems will disassemble and reassemble in novel ways. Holling et al. In Search of a Theory of Adaptive Change “ NO SURPRISES” MYTH:
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  • 64. Ingerson, Ann L. 2007. U.S. Forest Carbon and Climate Change. Washington, D.C.: The Wilderness Society. The climate won’t be saved by simply saving forests … while continuing to rely on fossil fuels.
  • 65. It’s not just about forests …
  • 66. Oceans, prairies, rivers are all at risk, and can play a role in mitigating climate change.
  • 67. Thanks for listening! Doug Heiken [email_address] www.oregonwild.org Detailed report on forests-carbon-climate available: http://tinyurl.com/2n96m5