Oliver, I have seen the paper but cannot post a copy online. In the paper the authors did measure the release of nitrate, nitrite, ammonia, phosphate and silicate in leaching experiments and concluded that the impact of these macronutrients released from Kasatochi ash on primary productivity was probably minimal. They also suggested that the release of trace metals other than iron could also have influenced phytoplankton growth.
Chris. On Monday, August 19, 2013 4:23:59 PM UTC+1, Oliver Tickell wrote: > I have not found an open source version of this paper yet, but here is a > related one. > http://www.biogeosciences.net/10/3715/2013/bg-10-3715-2013.pdf > They do recognise that diatoms need silicic acid but do not seem to have > thought of volcanic ash as a source of silicic acid, only of iron. > > Re olivine application, it is worth noting that olivine is a mixture of Mg > silicate and Fe silicate. Some proportion, to be determined, of the iron in > olivine will become bioavailable as weathering progresses. > > Oliver. > =============== > > The ocean response to volcanic iron fertilisation after the eruption of > Kasatochi volcano: a regional-scale biogeochemical ocean model > study > A. Lindenthal1 > , B. Langmann1 > , J. Patsch ¨ > 2 > , I. Lorkowski2 > , and M. Hort1 > 1 > Institute of Geophysics, KlimaCampus, University of Hamburg, Hamburg, > Germany > 2 > Institute of Oceanography, KlimaCampus, University of Hamburg, Hamburg, > Germany > Correspondence to: B. Langmann ([email protected] <javascript:>) > Received: 29 June 2012 – Published in Biogeosciences Discuss.: 26 July 2012 > Revised: 18 April 2013 – Accepted: 8 May 2013 – Published: 5 June 2013 > > > > > On 19/08/2013 15:03, Oliver Tickell wrote: > > This is very odd. Based on the abstract only (article behind paywall) it > appears that they attribute the diatom bloom to iron fertilisation. Oddly > they have not considered the role of silicic acid from the dissolution of > Mg silicate species in the finely powdered volcanic ash. Silicic acid is > often the limiting nutrient for diatoms, as they use it to make their > silica shells. There is ample geological evidence of diatom (specifically) > blooms being associated with falls of volcanic ash. > > Is anyone able to post the actual article? Oliver. > > On 17/08/2013 17:13, Wil Burns wrote: > > FYI. wil > > MEPS - Vol. 488 - Table of > contents<http://www.int-res.com/abstracts/meps/v488/> > *Mar Ecol Prog Ser (Print ISSN: 0171-8630; Online ISSN: 1616-1599)* > Copyright © 2013 Inter-Research. Published August 15 > > > *Olgun N, Duggen S, Langmann B, Hort M, Waythomas CF, Hoffmann L, Croot P > * > Geochemical evidence of oceanic iron fertilization by the Kasatochi > volcanic eruption in 2008 and the potential impacts on Pacific sockeye > salmon > MEPS 488:81-88 <http://www.int-res.com/abstracts/meps/v488/p81-88/> | Full > text in pdf format<http://www.int-res.com/articles/meps2013/488/m488p081.pdf> > > -- > Dr. Wil Burns, Associate Director > Master of Science - Energy Policy & Climate Program > Johns Hopkins University > 1717 Massachusetts Avenue, NW > Room 104J > Washington, DC 20036 > 202.663.5976 (Office phone) > 650.281.9126 (Mobile) > [email protected] <javascript:> > > http://advanced.jhu.edu/academic/environmental/master-of-science-in-energy-policy-and-climate/index.html > > SSRN site (selected publications): http://ssrn.com/author=240348 > > > Skype ID: Wil.Burns > > Teaching Climate/Energy Law & Policy Blog: > http://www.teachingclimatelaw.org > > -- > 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. > 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] <javascript:>. > To post to this group, send email to [email protected]<javascript:> > . > Visit this group at http://groups.google.com/group/geoengineering. > 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. For more options, visit https://groups.google.com/groups/opt_out.
