
http://www.kptv.com/slideshow/news/25448712/detail.html
I have long suspected that the contribution of forests by way of carbon sequestration to the slowing or elimination of global warming is to a great extent wishful thinking. I believe this because a great deal of the biomass (including, leaves, stems, branches, dead trees etc.) release their CO2 back into the atmosphere as a result of metabolic respiration (decomposition). Consequently the net carbon sequestration is demonstrably less than the gross amount. In conversation with the lead scientist on site I learned that this is a major area of study for the project. They are actually measuring (atomospheric sampling and isotopic analysis) the quantity of CO2 that is absorbed on site and the quantity released. This conversation took place in a 100 year old stand of douglas-fir. The site had been logged by steam donkey in 1910 and badly damaged in the process. Heavy soil compaction and destruction of the understory has resulted in a slow growing stand of undersized trees of very low productivity. When asked about carbon sequestration in this site Ken (lead scientist) replied that this forest unit was a net producer of CO2. This study is currently in pre-publication stage and is being submitted to Science magazine. I look forward to reading it.