Ron and list,
In response to your points: 2. I would agree that placing biochar in soil is likely to be the best place to put it, however, I was not commenting on that sort of issue in my paper. I have not seen any citations for depositing biochar in the ocean. My mention of depositing biochar/charcoal in the ocean was speculation that this might potentially reduce the impact on the deep sea environment compared to depositing crop wastes. 3. The paper has been submitted to the journal but is not yet on the website. 4. I have not come across any more recent citations on this point. Someone could re-run the search that David Keith used. 6. The section ‘Use of marine algae for carbon sequestration’ includes a number of references relevant to your point, particularly those covering the use on marine macroalgae as a fuel. Chris. On Monday, 18 February 2013 20:27:24 UTC, Ron wrote: > > Chris and list: > > 1. Thanks for forwarding your interesting 4-pager on marine > engineering. I respond here only from the perspective of biochar. > > 2. On your p 2, the word "biochar" appears this way:* > "Depositing crop wastes on the deep seabed – Strand and > Benford (2009) have proposed depositing bales of terrestrial crop wastes on > the deep seabed and this could potentially be extended to include > depositing biochar/charcoal or other organic remains."* > I have seen once an oblique reference (I might not be able to find > now) to biochar possibly being beneficial when planting mangroves. But in > general, I think the biochar community would recommend placing biochar in > soil - perhaps the most seriously degraded coming first. The benefit would > be centuries or millennia (?) of continuing productivity improvement that > it is not obvious could also occur in the oceans > Have you seen any citations to similar out-year productivity (or > other) benefits if biochar was deposited in the ocean? > > 3. I liked very much your method of directing readers to links. > However for the first (Belter and Seidel, 2013), I was unsuccessful > finding anything at the WIREs ste. Can you/anyone help? > > 4. The second citation directed us to a small part of a Keith AGU 2011 > lecture was a little disappointing as the citation history ended with > 2010. Can anyone update that history - and/or describe how to get > something from Google or other ? > > 5. Most interesting to me was the first half of the same AGU lecture - > a talk by Ken Caldera comparing several CDR approaches. This is the topic > of my next note - as Ken's talk had relatively little to do with oceans - > and I have seen so few CDR comparisons. > > 6. I hope next time you can write something about harvesting ocean > biomass (macroalgae and other) for use on land as input for such CDR > approaches as BECCS and biochar. I believe the energy and soil benefits > of such a direction of biomass movement will nicely complement the > potential CDR benefits of ocean biomass. > > Again thanks for bringing your concise marine/oceans/geoengineering survey > to our attention. > > Ron > ------------------------------ > *From: *"Chris Vivian" <[email protected] <javascript:>> > *To: *[email protected] <javascript:> > *Sent: *Monday, February 18, 2013 4:22:19 AM > *Subject: *[geo] Brief Summary Marine Geoengineering Techniques > > For your information, see the attached leaflet on marine geoengineering > techniques that has been submitted to the IMO as a UK information paper for > the forthcoming London Convention/Protocol Scientific Groups meeting. The > leaflet is also on the Cefas website at: * > http://www.cefas.defra.gov.uk/publications/files/20120213-Brief-Summary-Marine-Geoeng-Techs.pdf > *<http://www.cefas.defra.gov.uk/publications/files/20120213-Brief-Summary-Marine-Geoeng-Techs.pdf> > > Best wishes > Chris. > > > > -- > You received this message because you are subscribed to the Google Groups > "geoengineering" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > To post to this group, send email to [email protected]<javascript:> > . > Visit this group at http://groups.google.com/group/geoengineering?hl=en. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/geoengineering?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
