Re: [geo] More on Arctic methane

Hi thanks. Is the point here, that given warming, there is no currently known natural mechanism to prevent methane release? Therefore we must prevent release - even if this means using an anthropogenic mechanism? With my best wishes to everyone trying to sound the alarm and diffuse the bomb.

[geo] Geoengineering and (un)making the world we want to live in | GeoLog

http://geolog.egu.eu/2013/07/31/geoengineering-and-unmaking-the-world-we-want-to-live-in/ Geoengineering and (un)making the world we want to live in 31JUL Geoengineering and its policy implications were hot topics at this year’s Science in Public conference. The subject raised questions such as

Re: [geo] Geoengineering and (un)making the world we want to live in | GeoLog

... we make the world we live in by the language we speak in it OK, how about this language: Since we are failing to stabilize CO2 by conventional means, wouldn't it be a good idea to rapidly, communally, and objectively explore alternative strategies just in case even one of them proves

Re: [geo] ESD - Carbon farming in hot, dry coastal areas: an option for climate change mitigation

I am trying to understand the CDR logic with regard to biomass sequestration. Let's say we run these jatorpha carbon farms for 40 years. The resulting woody biomass will release its CO2 back into the atmosphere after X years or a big fire, whichever occurs first, in a dry coastal area...

RE: [geo] ESD - Carbon farming in hot, dry coastal areas: an option for climate change mitigation

Fred, Once a forest is mature it is in equilibrium, and no incremental carbon is sequestered. However, the growth to maturity takes carbon out of the atmosphere. Hence this is a one time sequestration effort that lasts as long as the forest. If a forest fire came, and the forest were

[geo] Re: More on Arctic methane

Hi Folks, Any debate over the speed of and/or effects of the Arctic methane release appears to me to be as about as productive as debating the differentiation between driving a car into a wall at 160kmph or 190kmph. Either way, it will be catastrophic and we need to take immediate actions.

Re: [geo] ESD - Carbon farming in hot, dry coastal areas: an option for climate change mitigation

Do forests sequester carbon with the same physical security and long time span as the deep ocean or geologic structures? My impression from what I've read is that forests can come and go on centennial scales. --- Fred Zimmerman Geoengineering IT! Bringing together the worlds of geoengineering

RE: [geo] ESD - Carbon farming in hot, dry coastal areas: an option for climate change mitigation

Fred, I think forest sequestration has less certainty than deep ocean disposal over a 500 year framework. However, cost needs to be factored in as well: if it is an affordable choice, a low cost per ton might offset the lower certainty. Further, suppose future climate makes the forest

[geo] Re: More on Arctic methane

Clarification on zeolite/methane release: No combustion needed for release. Temperature or pressure swings will release the methane (per Dr. Smit). Temperature is tricky and so pressure swings should be the focus of engineering for zeolite/methane processing. Best, Michael On Tuesday,

RE: [geo] ESD - Carbon farming in hot, dry coastal areas: an option for climate change mitigation

Peter Fred,Whatever works. Some thoughts:1) Perhaps keep sequestering (or longer X) by converting all the wood to biochar.2) Include the costs of supplying nutrients. My understanding is that most of the organic nitrogen is lost to the atmosphere during char production.3) Use a sulfur burner to

[geo] Goldblatt finds that theory may not rule out Hansen's concern about a runaway greenhouse if we burn it all....

Nature Geoscience published Goldblatt et.al. on July 28 2013, i.e. *Low simulated radiation limit for runaway greenhouse climateshttp://www.nature.com/ngeo/journal/v6/n8/full/ngeo1892.html * The study finds an uninhabitable planet is a risk, although the last statement in the abstract