Originally published on
by email@example.com (Sam Carana) at Arctic News
Agriculture, land use and forestry responsible for half of people’s greenhouse gases emissions?
The image on the right updates an image from an earlier post, illustrating the difference between using a Gobal Warming Potential (GWP) for methane of 150 over a few years versus 28 over 100 years. The IPCC in its special report Climate Change and Land assessed the impact of AFOLU (agriculture, forestry, and other land use) versus the impact of fossil fuel, etc., by using a GWP for methane of 28 over 100 years, referring to AR5, an earlier IPCC report.
When using this 171 GWP for methane and when including pre- and post-production activities in the food system, AFOLU (agriculture, forestry, and other land use) causes about half of people’s 2007-2016 emissions.
Methane’s one-year GWP is 200
The image below shows a trendline that is based on IPCC AR5 data that were similarly updated by 14% and that indicates that methane’s one-year GWP is 200.
Methane Levels Rising Rapidly
|Above suggestion to take strong action was posted Nov. 9, 2020 at facebook|
Even when issuing a mandate, e.g., for a rapid transition to clean, renewable energy, the question remains how this is best implemented. To what extent could bans help speed up the necessary transition to clean, renewable energy? Examples are banning cars from entering (parts of) cities, banning the construction of new coal-fired power plants, banning fracking and banning natural gas hookups in new construction.
|Image from the 2014 post Biochar Builds Real Assets|
The Climate Plan likes local communities to decide what works best in their area, while recommending local feebates as the preferred policy tool. Indeed, fees that are set high enough can effectively ban specific alternatives. Furthermore, instead of using money, local councils could add extra fees to rates for land where soil carbon falls, while using all the revenues for rebates on rates for land where soil carbon rises; that way, biochar effectively becomes a tool to lower rates, while it will also help improve the soil’s fertility, its ability to retain water and to support more vegetation.
That way, real assets are built.
Mean global carbon dioxide was 413.28 ppm in November 2020. Mean global methane was 1891.9 ppb in November 2020, which at a 1-year GWP of 200 is 378.38 ppm CO₂e. Together, CO₂ and methane add up to 791.66 ppm CO₂e, which is 408.34 ppm CO₂e away from the 1200 ppm CO₂e clouds tipping point.
Such a methane burst of about 5 Gt alone could suffice to raise the CO₂e level to 1200 ppm and trigger a further 8°C global temperature rise due to the couds feedback.
• Climate Plan
• IPCC special report Climate Change and Land
• IPCC Report Climate Change and Land
• Radiative forcing of carbon dioxide, methane, and nitrous oxide: A significant revision of the methane radiative forcing – by Maryam Etminan et al. (2018)
• IPCC keeps feeding the addiction
• How much warming have humans caused?
• Most Important Message Ever
• January 2021 executive order by President Biden on Protecting Public Health and the Environment and Restoring Science to Tackle the Climate Crisis
• NOAA mean global carbon methane
• Why stronger winds over the North Atlantic are so dangerous
• Feedbacks in the Arctic
• When will we die?
• A rise of 18°C or 32.4°F by 2026?
• Methane Hydrates Tipping Point threatens to get crossed
• Arctic Hit By Ten Tipping Points
• Crossing the Paris Agreement thresholds
• Most Important Message Ever
• Blue Ocean Event
• Record Arctic Warming
• There is no time to lose
• Warning of mass extinction of species, including humans, within one decade
• Frequently Asked Questions: How much methane is stored in hydrates and how much of this could be released, say, within a few years?
• 2020: Hottest Year On Record