The thought that harvesting biomass removes carbon from the soil needs careful checking. I can cite one study in which the recovery of straw from black prairie soils in Saskatchewan did not reduce soil carbon.
And my reaction is “of course”: half the wheat plant is below the ground, and regrown every year. Further, nature has evolved a host of bacteria and fungi that turn the straw on top of the soil into energy and CO2. Hence in this case whether the straw rots (is digested) or collected on the surface, the soil carbon is unchanged. There is no doubt that plowing of soil has reduced soil carbon, and I am aware of some studies that suggest that in some localities forest harvesting has reduced soil carbon. But to cite this as a reason to back away from bioenergy is poor science, or rather non-science. Peter Peter Flynn, P. Eng., Ph. D. Emeritus Professor and Poole Chair in Management for Engineers Department of Mechanical Engineering University of Alberta [email protected] cell: 928 451 4455 *From:* [email protected] [mailto: [email protected]] *On Behalf Of *Ronal W. Larson *Sent:* Saturday, May 14, 2016 10:26 PM *To:* Hawkins, Dave <[email protected]>; Geoengineering < [email protected]> *Cc:* RAU greg <[email protected]>; Andrew Lockley < [email protected]> *Subject:* Re: [geo] Anti biofuels letter Dave, list and ccs See inserts below. On May 14, 2016, at 5:50 PM, Hawkins, Dave <[email protected]> wrote: Ron, I you look up the publications of a number of the signers of this letter you will see that many of them have published papers emphasizing the value of carbon uptake in forests and soils. *RWL1: It would be impossible I think to argue the converse. I’d appreciate the signer names I should look up who have emphasized biomass for CDR purposes (i.e. biochar). I recognize none of the 65 as having written positively on biochar.* A major reason many of them oppose this amendment is the language requiring the adoption of policies that “reflect the carbon-neutrality of forest bioenergy. *[RWL2: The full quote (from below) is:* * “**reffect the carbon-neutrality of forest bioenergy and* * recognize biomass as a renewable energy source, provided the use of forest biomass for energy production does not cause conversion of forests to non-forest use.”* * I agree that one can utilize biomass in a manner that will not provide carbon neutrality. But I argue that biochar can be legitimately carbon negative (and easier to prove if the pyrolysis gases are utilized to displace fossil energy - instead of vented or flared). My best proof are the Terra Preta soils. If those soils are evidence of carbon negativity, then carbon neutrality is guaranteed as well. Much biochar is being made with no energy co-product value - and is still carbon negative - wot when placed in the soil, but in a “ hort" time. I’ll bet most (Congressional staff?) authors of this amendment never heard of biochar - but biochar’s rapidly growing acceptance nevertheless makes this above quote correct - in my opinion. If not - why not?* Their justified fear is that this language will be interpreted as requiring policies to *assume* that all *or most* forms of forest bioenergy are carbon neutral. *[RWL3: I hope that your “most” (highlighted above) is a concession that one should not “assume” when one has evidence (Terra Preta) that the assumption is untrue. Because terra preta exists, carbon negativity from biomass should not be in question - and therefore carbon neutrality (less difficult) should not be either.* Since such an assumption cannot be justified by science, they oppose this language. *[RWL4: There might have been 1000 papers in the last year in respected science journals about biochar’s impacts on soils - not all - but mostly positive impacts; carbon negativity is rarely disputed in this biochar literature. I don’t know of one that suggests carbon negativity is not possible. A list of about 1500 cites are given for 2015 in the bibliography at www.biochar-international.org <http://www.biochar-international.org> (about 4500 cites I recall for all years). So I am claiming this group of 65 is analyzing biomass and energy - not biomass and carbon negativity - the subject matter of this list - and they have come up with an incorrect conclusion on biomass and carbon neutrality - because their “net” was too small.* *Ron* David ________________________________ From: [email protected] <[email protected]> on behalf of Ronal W.Larson <[email protected]> Sent: Saturday, May 14, 2016 7:09 PM To: RAU greg Cc: Andrew Lockley; Geoengineering Subject: Re: [geo] Anti biofuels letter List, cc Dr. Rau This is to comment on both the Senate Amendment 3140 and Greg’s reaction, both received today.. 1.. The actual amendment is near the end of the Senate discussion on the amendments - found at https://www.congress.gov/congressional-record/2016/02/02/senate-section/article/S470-2, saying (in full): "Amendment No. 3140, as modified (Purpose: To require certain Federal agencies to establish consistent policies relating to forest biomass energy to help address the energy needs of the United States) At the end of part IV of subtitle A of title III, add the following: SEC. 30__. POLICIES RELATING TO BIOMASS ENERGY. To support the key role that forests in the United States can play in addressing the energy needs of the United States, the Secretary, the Secretary of Agriculture, and the Administrator of the Environmental Protection Agency shall, consistent with their missions, jointly-- (1) ensure that Federal policy relating to forest bioenergy-- (A) is consistent across all Federal departments and agencies; and (B) recognizes the full benefits of the use of forest biomass for energy, conservation, and responsible forest management; and (2) establish clear and simple policies for the use of forest biomass as an energy solution, including policies that-- (A) reflect the carbon-neutrality of forest bioenergy and recognize biomass as a renewable energy source, provided the use of forest biomass for energy production does not cause conversion of forests to non-forest use. (B) encourage private investment throughout the forest biomass supply chain, including in-- (i) working forests; (ii) harvesting operations; (iii) forest improvement operations; (iv) forest bioenergy production; (v) wood products manufacturing; or (vi) paper manufacturing; (C) encourage forest management to improve forest health; and (D) recognize State initiatives to produce and use forest biomass.” [RWL: I find this amendment language to be quite acceptable from both a CDR and biochar perspective - and so hope someone can say which words they would have changed. Of course, I wish that the term carbon-negativity had appeared rather than carbon neutrality. 2. Re the last line (2)(D), last week I gave testimony on Colorado SB16-003 bill that passed a few days later on our legislature’s final day. Despite almost every bill dealing with energy or climate failing on a party line basis this year, this bill had 2 votes in opposition (one in each house). The Colorado bill contained a paragraph asking the state foresters to address the potential role of biochar in forest health. P 3, line 21 reads: “USES FOR HAZARDOUS FUELS IN FORESTS, INCLUDING BIOCHAR, ENERGY,..” http://www.leg.state.co.us/clics/clics2016a/csl.nsf/fsbillcont3/0FE77EB9EE65CA4887257F2400641EE2?open&file=003_rer.pdf All the testimony, mainly from foresters and all positive, noted that Colorado forests are overstocked - with no funds to remove (and productively utilize) our huge supply of beetle-killed trees. I mention this in hope some foresters will help Colorado on this CDR path. 3. So, I find this Amendment 3140 to be in perfect agreement with Colorado state action. And the reason is that our SB16-003 recognizes the need for Carbon Dioxide Removal (CDR). The text of the 65-signatory letter mentions only energy. There is no hint the 65 authors were considering CDR - nor understand how much all CDR advocates desire a continually increasing forest. Removing forests is prohibited in Amendment 3140. Use of forest biomass does not have to be carbon positive - and especially if one is employing biochar (or, with more difficulty, BECCS). 4. So, considering this list’s focus, I suggest there is no universal validity to sentences such as this from the actual letter (given in its entirety by Andrew a few days ago). “This well-intentioned legislation, which claims to address climate change, would in fact promote deforestation in the U.S. and elsewhere and make climate change much worse. " I see the exact converse as being more accurate; the letter has a very narrow view of what is possible using free sunlight and photosynthesis to CDR advantage. If we want healthy growing forests, they can and should be managed for CDR purposes. I therefore suggest that the 65-author letter should not be used in any way to discourage CDR via biomass and so have to disagree in part with Greg. 5. I do agree with Greg that we need a much broader NET policy (neither Amendment 3140 nor the letter has such an aim) and that ocean biomass should not be ignored (and especially when used to improve soil fertility). Ron On May 14, 2016, at 11:18 AM, Greg Rau < [email protected]<mailto:[email protected]>> wrote: Exactly why a much broader NET policy and R&D focus is needed, and one that does not ignore the ocean. Greg Sent from my iPhone On May 14, 2016, at 12:57 AM, Andrew Lockley < [email protected]<mailto:[email protected]>> wrote: Attached letter (untitled) from 65 scientists protesting the US approach to forest biofuels. This shows generally that expansion of biofuels as a precondition to BECCS will neither be easy nor uncontroversial. A -- You received this message because you are subscribed to the Google Groups "geoengineering" group. 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