User Tools

    Please register ( or log-in ) to create and edit pages
  • Register

Site Tools


Wikenigma - an Encyclopedia of Unknowns Wikenigma - an Encyclopedia of the Unknown Wikenigma - an Encyclopaedia of Unknowns Wikenigma - an Encyclopaedia of the Unknown

Global Atmospheric Methane Cycle

Methane is roughly 30 times more potent as a Greenhouse Gas than CO2. Over the last 30 years, the measured levels in the atmosphere have been steadily rising, - maintaining a clearly defined seasonal cycle. 1900 parts per billion (ppb) was reached in November 2018 - the highest level in 800,000 years.

“Methane is an important greenhouse gas, responsible for about 20% of the warming induced by long-lived greenhouse gases since pre-industrial times. By reacting with hydroxyl radicals, methane reduces the oxidizing capacity of the atmosphere and generates ozone in the troposphere. Although most sources and sinks of methane have been identified, their relative contributions to atmospheric methane levels are highly uncertain.”

Source: https://www.nature.com/articles/ngeo1955External LinkThree decades of global methane sources and sinks, Nature Geoscience, 2013

Also see: Wikipedia

“The balance between sources and sinks of methane is not yet fully understood. The IPCC Working Group I stated in chapter 2 of the Fourth Assessment Report that there are “large uncertainties in the current bottom-up estimates of components of the global source”, and the balance between sources and sinks is not yet well known.”

Importance Rating


    Share this page :


DOKUWIKI IMPLEMENTATION DESIGN BY UNIV.ORG.UK