CO2 Now

Carbon Targets for Humanity PDF Print E-mail

CO2 Targets

This article is about humanityís three great carbon crises: global warming, climate change and ocean acidification.  It identifies a concrete, directional target for atmospheric CO2 that can end the carbon crises, along with concrete carbon emissions targets for getting us there.   These targets are presented in the context of the limited time for reaching the targets.  Readers are encouraged to use the links that are embedded in this article.   

Earth is becoming a tougher place to thrive and survive.  The planetís self-regulating systems are being altered.  With a less stable environment, Earth is losing many living species and its ability to supply the world economy with basic goods and services.

The main driver behind these changes is carbon emissions.  Mostly they are produced as humans burn fossil fuel  for energy.   Carbon emissions have been high enough to boost  the concentration of carbon dioxide (CO2) in the atmosphere to present day levels of roughly 390 parts per million.  This is about 30% higher than atmospheric CO2 levels for at least 800,000 years  before the industrial revolution.   

Atmospheric CO2 Projections PDF Print E-mail

Where is atmospheric CO2 and global temperature headed?  Without equivocation, median projections show that key trajectories for climate system disruption are pointed in a dangerous direction. 

Stabilizing Climate requires Near-Zero Emissions PDF Print E-mail


Reposted from ScienceDaily (Feb. 18, 2008)   Now that scientists have reached a consensus that carbon dioxide emissions from human activities are the major cause of global warming, the next question is: How can we stop it? Can we just cut back on carbon, or do we need to go cold turkey? According to a new study by scientists at the Carnegie Institution, halfway measures wonít do the job. To stabilize our planetís climate, we need to find ways to kick the carbon habit altogether.

In the study, to be published in Geophysical Research Letters, climate scientists Ken Caldeira and Damon Matthews used an Earth system model at the Carnegie Institutionís Department of Global Ecology to simulate the response of the Earthís climate to different levels of carbon dioxide emission over the next 500 years. The model, a sophisticated computer program developed at the University of Victoria, Canada, takes into account the flow of heat between the atmosphere and oceans, as well as other factors such as the uptake of carbon dioxide by land vegetation, in its calculations.