negative feedback, definition of

Carbon Footprint refers to the the total greenhouse gas emissions that result from a person, organization, product or service over a given time.

It tends to act as an umbrella term for any attempt to measure greenhouse gas emissions and as a result can refer to simply the emissions that result from a single activity, such as flying; the emissions that result from an organization or building over the course of a year; or the full lifetime emissions of a product or organization, including emissions from the supply chain or disposal of resources.

While carbon footprints colloquially refer to the amount of CO2 emitted, the UK Carbon Trust endorses a wider definition and considers all six of the Kyoto Protocol greenhouse gases - Carbon dioxide, Methane, Nitrous oxide, Hydro fluorocarbons, Perfluorocarbons, and Sulfur hexafluoride - when measuring a carbon footprint.

• Demystifying feedback.
  Guest post by Nick Stokes, People outside climate science seem drawn to feedback analogies for climate behaviour. Climate scientists sometimes make use of them too, although they are not part of GCMs. But it gets tangled. In fact, all that the feedback...
• Another negative climate feedback: more CO2 = more plants = more aerosols = cooling
  Recall a couple of days ago that I posted on the aerosols released by trees: Those dirty trees: why hasn’t the EPA called for trees to be regulated? Now, from the International Institute for Applied Systems Analysis  comes a cause-effect … Continue...
• Dronning Maud Meets the Little Ice Age
  Guest Post by Willis Eschenbach I have to learn to keep my blood pressure down … this new paper, “Abrupt onset of the Little Ice Age triggered by volcanism and sustained by sea-ice/ocean feedbacks“, hereinafter M2012, has me shaking...
• New peer reviewed paper: clouds have large negative cooling effect on Earth’s radiation budget
  Oh dear, now we have three peer reviewed papers (Lindzen and Choi, Spencer and Braswell, and now Richard P. Allan) based on observations that show a net negative feedback for clouds, and a strong one at that. What will Trenberth … Continue reading...
• New peer reviewed paper: clouds have large negative-feedback cooling effect on Earth’s radiation budget
  Oh dear, now we have three peer reviewed papers (Lindzen and Choi, Spencer and Braswell, and now Richard P. Allan) based on observations that show a net negative feedback for clouds, and a strong one at that. What will Trenberth … Continue reading...

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