Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
National Center for Case Study Teaching in Science Carbon Balance of Forest Thinning and Bioenergy Production by Katharine C. Kelsey Environmental Studies Program University of Colorado, Boulder, CO Why are we interested in managing carbon? 2 Ways to manage carbon… 3 Carbon uptake (photosynthesis) Carbon emissions (fire, decomposition) Carbon storage 4 US Forest Service Climate Change Strategy 5 6 What is a ‘forest treatment’? Mechanical thinning: Prescribed fire: http://www.advancedmastergardener.org 7 Which of these forests holds more carbon? How will each forest respond to wildfire? What are the effects on forest carbon if we treat this forest? 8 9 Char/ash 14 Mining/harvest C emissions (Mg/ha) 12 Transportation/processing 10 Combustion 8 6 4 2 0 Biomass Coal Offset 10 Carbon (Mg/ha) 150 Annual Carbon Exchange Cumulative Carbon Exchange Total Stand Carbon 100 50 0 -50 2010 2030 2050 2070 2090 2110 11 Carbon (Mg/ha) 150 Annual Carbon Exchange Cumulative Carbon Exchange Total Stand Carbon 100 uptake 50 0 emission -50 2010 2030 2050 2070 2090 2110 12 Image Credits Except as otherwise noted below, all photos and figures were made by the case author, K. Kelsey. Slide 3: Image showing traffic: O. Gago; http://commons.wikimedia.org/wiki/Traffic#/media/File:Auto_stoped_highway.JPG Image showing smoke stacks: http://commons.wikimedia.org/wiki/Pollution#/media/File:Pollution_de_l%27air.jpg Image showing forest: http://commons.wikimedia.org/wiki/Forest#/media/File:Kellerwald_004.jpg Slide 5: Climate Change Performance Scorecard. Adapted from http://www.fs.fed.us/climatechange/advisor/scorecard.html Slide 7: Image showing fire behavior: http://www.advancedmastergardener.org Photo showing mechanical thinning: W. Anderson; http://commons.wikimedia.org/wiki/File:Scots_pine_Woodland_after_Thinning_-_geograph.org.uk_-_1035195.jpg Photo showing prescribed fire: US Fish and Wildlife Service; http://commons.wikimedia.org/wiki/File:Watching_the_burn_(8119240717).jpg 13