Fred, With the albedo values I've estimated from photographs, the intervention would be capable of offsetting a significant fraction of radiative forcing. However, there's very no evidence that this estimated albedo correlates closely with actual albedo. Accordingly, I'd need accurate measurements to do viable calculations - and that's the basis of my request to the group.
A On 20 August 2013 14:03, Fred Zimmerman <[email protected]> wrote: > Have you done the back of the envelope numbers on surface area? My first > reaction was skepticism about the total surface area of "Bloomsdays" (blooms > as % of ocean surface area / all available days). Most of the area and most > of the earth is not covered in plankton blooms.That calculation might tell > you that the bloom albedo value necessary for significant radiative forcing > too great to be plausible, which would save you the trouble of doing imagery > analysis. > > > > > --- > Fred Zimmerman > Geoengineering IT! > Bringing together the worlds of geoengineering and information technology > GE NewsFilter: http://geoengineeringIT.net:8080 > > > On Mon, Aug 19, 2013 at 11:34 PM, Andrew Lockley <[email protected]> > wrote: >> >> I'm trying to find some data on ocean albedo with/without phytoplankton >> blooms. This is in order to assess whether the albedo impact of Ocean Iron >> Fertilization is likely to be significant on the Earth's radiation budget. >> >> The current data sources I have suffer from a couple of issues. >> >> 1. Uncalibrated albedo - Many photos of blooms are available online, but >> these don't have an absolute brightness scale. I.E. pure white on the photo >> doesn't constitute 100% reflectivity. Accordingly, it's little better than >> guesswork to determine what the actual albedo is from this source. >> 2. Blooms not distinguished - I've seen accurately measured albedo ranges, >> but these don't specifically attempt to distinguish between bloom and >> non-bloom conditions. Accordingly, there's no way to determine from this >> data what the difference is when a bloom is present. >> >> So I'm stuck. Does anyone have albedo data, or know where I could get it >> from? Ideally, I suppose this would be from an OIF ship, but it strikes me >> as likely that other people will have gathered data in the course of >> unrelated research. >> >> I'm really keen to run the numbers on this, but without this data I'm not >> able to proceed. Any ideas/help/sources/advice/datasets gratefully received >> . >> >> Thanks >> >> A >> >> -- >> 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. > > -- 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.
