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Messages - dbarce

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1
Walking the walk / Re: Gardening
« on: March 27, 2020, 05:42:30 PM »
longer stems usually indicate lack of light.  keep the ones that survived but give them more light. sow new seed  if you have access to some.

2
Policy and solutions / Re: The Most Ambitious Plan of the Human Race
« on: January 02, 2020, 12:53:29 PM »
This study debunks the "green growth" strategy. Mainly due to the lack of geophysical availability for the required materials.

https://www.sciencedirect.com/science/article/pii/S2211467X19300926

3
Out of curiosity I checked other wind related data at Climate Reanalyzer and found this 10m windspeed anomaly graph. I am not a climate scientist, so I dont understand the relation of Angular Momentum in wind to this. It does seem to show an increase in surface windspeeds over the last decades right?

Edit: Assuming Mr in Sark's graph does stand for mean angular momentum.

4
Consequences / Re: Wildfires
« on: August 19, 2019, 02:10:40 PM »
Second out of control wildfire in Gran Canaria this year.

https://elpais.com/elpais/2019/08/19/inenglish/1566205037_427383.html?autoplay=0

6
Policy and solutions / Re: Low GHG Meat
« on: July 18, 2019, 09:04:58 AM »
When talking about GHG emissions of livestock, Its not just the methane, but as you mention the mega-farms (over 1000 heads) consume a lot of fossil fuels in order to keep the feed flowing. If I understand the terms of COP resolutions/IPCC reports etc, we are supposed to reduce emissions to zero, and eventually take some carbon out of the atmosphere. This is NOT going to happen with industrial farming methods, or lab-grown meat, as every step of the process consumes high amounts of FF energy. (The production, distribution etc,.. of probiotics too) I hope this point is clear.

I agree with posters above, that the only real solution would be a drastic reduction in meat consumption, adapting of course to the place where you live. I.e. If you live in a mountainous region with lots of rain, and lots of grass, then the most efficient way of converting this solar energy into human-digestable protein is through a herbivore.  How are you supposed to grow protein and carbs otherwise in such an environment?

The following study shows that a proper 'intensive' grazing management could actually lead livestock to be a carbon sink.

https://www.sciencedirect.com/science/article/pii/S0308521X17310338?_rdoc=1&_fmt=high&_origin=gateway&_docanchor=&md5=b8429449ccfc9c30159a5f9aeaa92ffb

7
Consequences / Re: Effects of Climate Change on the biosphere
« on: July 05, 2019, 02:45:18 PM »
Very interesting paper in Science on the MASSIVE sargassum blooms that have appeared in the Atlantic Ocean yearly since the start of this decade. The authors point to several culprits, including deforestation of the Amazon, agriculture fertilizer run-off, and a tinge of climate-change...

The publication is not free access but you can sci hub it. It's worth the read.

https://science.sciencemag.org/content/365/6448/83

8
Consequences / Re: Places becoming less livable
« on: May 16, 2019, 10:04:06 PM »
The sargassum problem is way bigger than just Mexican beaches. It affects wide areas of the caribbean. I saw the problem first hand last year, and it was astonishing to see nature's capacity for disruption.

For anyone interested this website is a great resource for tracking sargassum blooms:

http://seas-forecast.com/

9
Consequences / Re: Wildfires
« on: May 15, 2019, 08:11:45 AM »

10
Science / Re: 2019 Mauna Loa CO2 levels
« on: May 06, 2019, 11:29:47 PM »
They just posted a correction on twitter:
Quote
The 415.09 ppm value that appeared as the daily baseline for 3-May-2019 on certain graphics over the weekend was based upon a partial days data and incorrectly released on the website. The correct value for that date based upon the full 24 hour period is 414.15 ppm

11
Walking the walk / Re: Passive / green House Design
« on: February 24, 2019, 09:53:52 PM »
Theres also the GAHT system which is designed by a company called CERES in Colorado.

If everything goes according to plan I should start construction soon of a greenhouse with a GAHT system. Essentially it should work as a heat battery.


12
Walking the walk / Re: Terra Preta / Biochar - Theory and Practice
« on: February 06, 2019, 11:47:05 PM »

bruce, after reading your post history in more detail, I truely find your approach laudable, and it sounds like the right way to go towards a carbon negative life. Would be super interesting to get some numbers on how much C you are sinking. The processes you describe do sound complicated to a layman. Or are they not? Do you know of others doing this with pigs?

A question for you dbarce, do you know any examples of anyone sinking more carbon than they consume ?

I've thought long and hard about this. The answer is a negative thus far. On a Carbon Atom by Carbon Atom basis there are always hidden carbon costs (like your barley, or the C used to build the tractor).

IMO the best theoretical path to achieving this goal is to reduce C consumption to a minimum. An extreme case I have met in person was a very isolated hunter gatherer tribe in southern sudan. Their C consumption was low (as far as I can think, only the wood used for fire). I am very aware that voluntarily turning society back to the paleolithic is improbable. But if we want to get serious about our predicament, at the very least 'making money' has to disappear as a priority. Do I see it happening? Nay.




13
Walking the walk / Re: Terra Preta / Biochar - Theory and Practice
« on: February 05, 2019, 09:39:19 PM »
It is time to plow in the cover crop and get to planting .

sorry for the non-biochar question in advance, but how are you planning to plow in the cover crop without using fossil fuels?

14
Walking the walk / Re: Gardening
« on: January 27, 2019, 03:59:55 PM »
How much electricity does the heat source pull?

 We use something called a heating cable (Heizkabel), which we pass through a bench containing sand kept moist. The wattage depends on the surface you want to heat, and thus the length of the cable. I found these numbers as a reference> 6 meters – 50watt, 10 meters – 100 watt, 25 meters 320 watt.  We have a 3m one, and keep it to 18-21C with a thermostat.

15
Walking the walk / Re: Gardening
« on: January 26, 2019, 12:35:03 AM »
When you say "grow indoors" do you mean inside a hoophouse/greenhouse or inside your home? tried to look in the comments, but couldnt find what kind of layout scale your little garden operation has. If you are growing indoors you might want to try to get more natural light to your seedlings or even grow outdoors and provide a heatsource. As a different option to the LEDs.

I also live in a very cloudy part of the world, albeit not as cold as where you live. Im setting up a small comercial garden operation and hereabouts, light under a polyethylene covered polytunnel seems to be enough to produce healthy seedlings. We will start our sowings (partially from a good seed house from yourparts of the world Reinsaat.at) next week. To heat up the seedlings in winter we use a table covered in sand with a heat source and place our trays on top. As I said though, I dont know if this is viable for you.

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