That would surely depend on the ocean circulation around reefs. It would be impractical to exert short-term control over reef pH if the surrounding water was from the ocean. Only where ripurine and coastal flows were a significant part of the local budget would adjusting the pH of either be effective. There's only so much adjustment to a river's pH you could make before destroying its ecosystem, so well-mixed reef water wouldn't be controllable using river pH tweaks.
A On 15 May 2013 13:09, Oliver Tickell <[email protected]> wrote: > This problem of ocean acidification is surely best solved by application of > ground up olivine bearing rock to land / coast, so removing carbonic acid > and replacing it with alkaline Mg++ and HCO3- (bicarbonate). The runoff from > land will of course end up in the oceans. > > Oliver. > > > On 15/05/2013 12:52, Andrew Lockley wrote: >> >> Please see below and attached. >> >> A >> >> >> ---------- Forwarded message ---------- >> From: E Couce <[email protected]> >> Date: 15 May 2013 12:47 >> Subject: Re: Tropical coral reef habitat in a geoengineered, high-CO2 >> world >> To: Andrew Lockley <[email protected]> >> Cc: geoengineering <[email protected]> >> >> >> Dear Andrew and all, >> >> thanks for the interest on the paper. It can be accessed on >> http://onlinelibrary.wiley.com/doi/10.1002/grl.50340/abstract >> >> Attached is an unformatted draft (also available for download free of >> charge on my website) >> >> Best regards, >> Elena >> >> >> >> On 15 May 2013 00:26, Andrew Lockley <[email protected]> wrote: >>> >>> Poster's note: Hopefully the author (see cc ) will be kind enough to >>> submit her paper to this list, as I lack a URL or copy >>> >>> Citation >>> >>> Couce, EM, Irvine, PJ, Gregorie, L, Ridgwell, AJ & Hendy, E 2013, >>> ‘Tropical coral reef habitat in a geoengineered, high-CO2world’. Geophysical >>> Research Letters, vol 40. >>> >>> Abstract >>> >>> Continued anthropogenic CO2 emissions are expected to impact tropical >>> coral reefs by further raising sea surface temperatures (SST) and >>> intensifying ocean acidification (OA). Although geoengineering by means of >>> Solar Radiation Management (SRM) may mitigate temperature increases, OA will >>> persist, raising important questions regarding the impact of different >>> stressor combinations. We apply statistical Bioclimatic Envelope Models to >>> project changes in shallow-water tropical coral reef habitat as a single >>> niche (without resolving biodiversity or community composition) under >>> various Representative Concentration Pathway and SRM scenarios, until 2070. >>> We predict substantial reductions in habitat suitability centered on the >>> Indo-Pacific Warm Pool under net anthropogenic radiative forcing of >>> ≥3.0 W/m2. The near-term dominant risk to coral reefs is increasing SSTs; >>> below 3 W/m2 reasonably favorable conditions are maintained, even when >>> achieved by SRM with persisting OA. ‘Optimal’ mitigation occurs at 1.5 W/m2 >>> because tropical SSTs over-cool in a fully-geoengineered (i.e. >>> pre-industrial global mean temperature) world. >>> >>> Key Points: >>> >>> • Large reductions in reef habitat suitability under net radiative >>> forcing >3 W/m2 >>> • Rising SSTs are greater threat for tropical coral reefs than ocean >>> acidification >>> • Solar Radiation Management may help maintain coral reef habitat over >>> near-term >> >> >> >> >> -- >> >> ------------------------------- >> Dr. Elena Couce >> School of Geographical Sciences >> Department of Earth Sciences >> University of Bristol >> E-mail: [email protected] >> Web: http://www.bristol.ac.uk/earthsciences/people/elena-m-couce >> > > > -- > 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. > > -- 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.
