CO2 levels increasing at a faster rate than before Continue reading Record Annual Increase of Carbon Dioxide Observed for 2015
Leader of Keeling Curve measurement says temporary bump from El Niño could push atmospheric CO2 levels above symbolic threshold for good Continue reading Is This the Last Year Below 400?
Scripps Oceanography lab monitoring atmospheric CO2 named National Historic Chemical Landmark
Continue reading American Chemical Society to Honor Keeling Curve in June 12 Ceremony
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.
Continue reading What Does This Number Mean?
The Scripps Institution of Oceanography, UC San Diego O2 and CO2 programs have received funding from multiple sources that put these operations on a relatively secure footing for the next few years. Continue reading A Keeling Curve Funding Update – April 2015
The rate of growth in carbon dioxide concentrations in the atmosphere has accelerated since the beginnings of the Keeling Curve. Continue reading Is the Rate of CO2 Growth Slowing or Speeding Up?
Breakthrough after field project collects richly detailed ice core records from Antarctica Continue reading New Study Shows Three Abrupt Pulses of CO2 during Last Deglaciation
Supports continued operation of the iconic measurement series Continue reading Wendy and Eric Schmidt Award $500,000 Grant to Keeling Curve
The story of the Keeling Curve is beautifully animated in this new video. The American Museum of Natural History will host a Google+ Hangout Sept. 9, 2014 on the topic of the Keeling Curve.
In response to a recent reader comment about wide fluctuations in CO2 readings at Mauna Loa, Ralph Keeling and Stephen Walker of the Scripps CO2 Group gave the following answer:
It’s fairly normal, especially in the summer time, to see strong afternoon “dips” in the CO2 concentration. The dips are generally caused by upslope winds that that are depleted in CO2 by photosynthesis at lower elevations. In the last few days have had very large swings of this sort showing the island influences can be strong. We do our best to exclude these island influences from the record by retaining only data when the concentration is stable for many hours. How unusual are the large recent swings? The magnitudes of the swings can vary significantly from year to year, with daily dips greater than 10ppm seen in some years. So the recent oscillations observed in a single day of about 6ppm are well within the range of normal variability.