24 Apr 2013:
New Web Site to Track
CO2 Levels As Planet Approaches 400 PPM
As atmospheric concentrations of carbon dioxide approach the milestone of 400 parts per million (ppm), a scientist at the Scripps Institution of Oceanography has launched a Website
that will publish daily readings of CO2 concentrations, an online resource he hopes will drive home the urgent threat of rising greenhouse gas emissions. Ralph Keeling, director of the Scripps CO2 program and son of the first scientist to measure CO2 concentrations, hopes the daily tracker will attract more attention than weekly or monthly postings, providing a stark index of humanity's effect on the global climate. “I hope that many people out there in decades to come will say, ‘Gosh, I will remember when it crossed 400,’” Keeling told ClimateWire
. The measurements will come from the Mauna Loa observatory in Hawaii. Keeling’s father, Charles David Keeling, first started collecting CO2 concentrations in the 1950s from the same observatory, when few believed that carbon dioxide concentrations were in fact rising. His ongoing recording of CO2 concentrations came to be known as the “Keeling Curve
.” As of April 22, carbon dioxide concentrations had reached 398.36 ppm, according to the site, well above pre-industrial concentrations of about 280 ppm.
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
Yale Environment 360
articles are now available in Spanish and Portuguese on Universia
, the online educational network. Visit the site.
Business & Innovation
Policy & Politics
Pollution & Health
Science & Technology
Antarctica and the Arctic
Central & South America
A look at how acidifying oceans could threaten the Dungeness crab, one of the most valuable fisheries on the U.S. West Coast. Watch the video.
is now available for mobile devices at e360.yale.edu/mobile
An aerial view of why Europe’s per capita carbon emissions are less than 50 percent of those in the U.S. View the photos.
An indigenous tribe’s deadly fight to save its ancestral land in the Amazon rainforest from logging. Learn more.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
Residents of the Chocó Rainforest in Ecuador are choosing to plant cacao over logging in an effort to slow deforestation.
Watch the video.
Tribal people and ranchers join together to stop a project that would haul coal across their Montana land. Watch the video.