We don't need to know anything of the kind, to answer the 2 questions I've asked.
I'd like to steer discussion *in this thread* away from the meaning of CO2 levels, or their causes. Ditto coming to conclusions about anything at all, except the dependability of TABULA in the use I'm putting it to. Granted that policymakers are being invited by IPCC and others (…quite persuasively: the UK has just declared a climate emergency) to limit the rise of atmospheric carbon, and consider carbon reduction, what's the scale of the problem, and what is it going to cost to fix? That's all I see TABULA helping with. On Fri, 7 Jun 2019 at 17:35, Don Guinn <[email protected]> wrote: > Well, before one can come to any conclusion on the meaning of co2 levels we > need to know if it is the cause of our climate change or an indicator of > other causes. There are many things affecting the climate. Co2 is only one. > > On Fri, Jun 7, 2019, 10:18 AM Ian Clark <[email protected]> wrote: > > > The addons math/tabula and its parent addons math/cal and math/uu have > been > > largely rewritten and are now far stabler than they were. > > > > The main way to get to grips with TABULA is via studying the built-in > > t-tables ("TABULA-tables") SAMPLE0--SAMPLE9… > > > > https://code.jsoftware.com/wiki/TABULA/samples > > > > The last one, SAMPLE9, is particularly noteworthy. See this page for > > details… > > > > > > > https://code.jsoftware.com/wiki/TABULA/samples/cost_to_capture_atmospheric_CO2 > > > > Atmospheric CO2 concentration has been rising steadily since 1960, when > it > > first began to be measured regularly at Mauna Loa, HI. At that time it > > stood at <320 ppm (parts-per-million). Now it stands at >400 ppm, an > > increase of over 80 ppm. > > > > This observed level of atmospheric carbon is gaining wider acceptance as > > having a damaging effect on the world's climate. Whether it does or not, > a > > British Columbia-based firm called Carbon Engineering has built a plant > to > > capture CO2 from the atmosphere, at a cost of <$100 per metric ton (100 > > USD/t). They have attracted $68 million investments from Chevron, > > Occidental and coal giant BHP. > > > > https://www.bbc.co.uk/news/science-environment-47638586 > > > > I don't want to take sides over this. Nor to invite the taking of sides > in > > this thread. Rather it's my aim to develop tools to help the rest of us > > explore the figures for ourselves, whatever side we're on. Relying on > > specialists to do the calculations is simply to promote a new world > > religion, with applied mathematicians as its priesthood. > > > > So I thought I'd take Carbon Engineering's current price and use TABULA > to > > calculate what it would cost to restore atmospheric concentration to 1960 > > levels. > > > > The cost comes out rather high: around 57 times the projected USA budget > > deficit for FY2020, would you believe? > > > > This raises vital questions for me: > > > > ++ are the input figures reliable? I used Google to track them down, but > > have I copied them over correctly? > > > > ++ is TABULA doing it right? I'm terrified of orders-of-magnitude errors, > > which can so easily arise with a misplaced prefix 'k' (kilo-) or 'G' > > (giga-). > > > > Would anyone fancy checking my calculations? > > > > Ian Clark > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
