Re: Forests: Carbon sequestration, biomass energy, or both? - New paper #carbonsequestration
Hi Paul, to the degree we can compare apples with apples, In the International System of Units, the prefix “giga” means 109, or one billion (1,000,000,000). Hence terms like “gigawatt” or “gigahertz.” Thus, a gigaton is equivalent to a billion metric tons.toggle quoted messageShow quoted text
So my figure of 110 billion tons is not far off, and there are some new elements to consider.
Back at 2007, the knowledge of the quantity of carbon held in the soil by the “wee Beasties” was not appreciated, - nobody back then was talking about there being 4 times the weight of a tree underground as it has overground, for instance, and only now are such matters being more comprehensively addressed, - (and more exactly measured).
So logging, particularly clear felling, is now being understood as far more serious than heretofore, yet the rate of such clearing has increased quite alarmingly, as from the super rich point of view, it is easy money, eg the Amazon situashe.
Then there is an arguable increase in take up of carbon dioxide, - where there was a restriction in growth from carbon dioxide in the atmosphere, - rather than enough water, or sunlight or minerals, - so basically mainly in crop growing using ‘modern' agriculture methods, as water and nutrients are fully supplied and no shade.
On the other side of that one, most of that extra carbon will return to the atmosphere so the Turnover figure will be greater, at least in appearance, yet that agricultural waste is very suitable for charring, so that is a very positive thing to work for, - no tree need be felled..
Not that trees are often felled for Biochar in the normal case, - but you know what I mean.
A discussion could be held about how to best extract carbon from agricultural waste, - of many different varieties, and some may argue that it is a poorer sort of Char, compared to Tree charcoal, but it should be ideal for feeding to cattle, - probably may not need crushing either, with many crops.
Also farms may have, or decide to have, both cattle (or other farm animals) and food crops, so several synergies may develop, including using the ’smoke’.
Hopefully, Paul, I have answered the first part of your query, - the carbon exchange/turnover, if not succinctly, but my second assertion, - that the land plants hold a reserve of 750 Billion tons you did not seem to challenge.
Whatever, I suspect that that figure has changed significantly, - not only due to the issues I mentioned above, but also the difficulty of calculating such a thing, including, where climate change is altering the balance of our various Biomes, - eg the Bushfires in Australia recently, - and in America also, and what can we do about them?
- I immediately thought of ramping up the feeding cattle charcoal publicity, if only for the increased water holding of the soil with the Biochar being added year after year, - and I would appreciate any helpful additions to my understanding on that one, - but also resurrecting an invention I made 30 or so years ago of an Electric Pump Firetruck, the which the local Lion’s club has committed to helping me fund and build a demo unit, as going through the bureaucracy is a life’s work, despite my many years of service in fighting bushfires. - eg to bring in a new idea there are four separate processes to say no, each containing an enormous amount of forms, meetings, much of it duplicationary and requiring meetings which may happen only annually, before you can get to a possible yes, then 5 more stages before actual work on a demo unit could start.
Meanwhile there will be more years of worsening situation. - btw I am not asking for assistance on this project, merely giving an eg.