Levels of the greenhouse gas carbon dioxide eclipsed 420 parts per million for the first time in human history in 2021. Scripps Institution of Oceanography updated this animation, which explains the rise of carbon dioxide concentration in the atmosphere over the past 300 years and the measurement our researchers collect at Hawaii’s Mauna Loa, known as the Keeling Curve. When … Read More
Record Annual Increase of Carbon Dioxide Observed for 2015
CO2 levels increasing at a faster rate than before
Is This the Last Year Below 400?
Leader of Keeling Curve measurement says temporary bump from El Niño could push atmospheric CO2 levels above symbolic threshold for good
American Chemical Society to Honor Keeling Curve in June 12 Ceremony
Scripps Oceanography lab monitoring atmospheric CO2 named National Historic Chemical Landmark
What Does This Number Mean?
Repost of April 2013 entry The Mauna Loa carbon dioxide (CO2) record, also known as the “Keeling Curve,” is the world’s longest unbroken record of atmospheric carbon dioxide concentrations.
Wendy and Eric Schmidt Award $500,000 Grant to Keeling Curve
Supports continued operation of the iconic measurement series
How are CO2 Data Processed?
Scientists make CO2 measurements in remote locations to obtain air that is representative of a large volume of Earth’s atmosphere and relatively free from local influences that could skew readings.
Why Don’t Global Surface Temperature Trends Match Atmospheric CO2 Increases?
Question submitted to Scripps Oceanography science magazine explorations now by Ruben M., Watsonville, Calif. Great question Ruben! The surface temperature we experience every day is not expected to perfectly track CO2 because CO2 isn’t the only factor driving climate change. Still, it is quite an important factor, and the overall rise in temperature does roughly follow the overall rise in CO2. … Read More
The Annual Rise in CO2 Levels Has Begun
Could hit 400 parts per million in January
Solving the Mysteries of Hiatus in Global Warming
Global mean temperatures have been flat for 15 years despite the increase in heat-trapping greenhouse gases, but a new Scripps study shows cooling in the equatorial Pacific Ocean explains the discrepancy
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