Aug 31, 2010 0
So there is a common expression that is getting even more common and more over used called “Back Of The Envelope” which basically is an expression that describes calculations that are very course spatially or vertically OR rough enough that they can be done on the back of an envelope/napkin.
I decided it might be fun to take this concept and apply it to the commonly held belief that man emits 45 Gigatons (1 Gigaton = 1 Billion Tons) per annum. This has been cited in many a popular and scientific paper. Hope you enjoy! I would just note that below there are a bunch of numbers and all assumptions came from some of my Ph.D. work and not out of thin air. It is interesting that my BOTEs while not exactly the same as the IPCC’s independent estimate of 45 Petagrams (1 Pg = 1 Gt) are similar. The issue going forward will be identifying the black-boxes that remain in these equations. (NOTE: All local ecosystem units are in Grams of Carbon per meter squared per year and this is a standard unit of measurement for ecosystem fluxes). Read the rest of this entry »