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])
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>
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