Peak carbon dioxide levels surpass 411 parts per million for May Continue reading Another Climate Milestone Falls at Mauna Loa Observatory
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
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.
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. Continue reading How are CO2 Data Processed?
Could hit 400 parts per million in January Continue reading The Annual Rise in CO2 Levels Has Begun
A companion phenomenon of emitting CO2 into the atmosphere is the loading of the oceans with elevated levels of carbon dioxide created by fossil fuel burning and other human activities.
Scripps Institution of Oceanography, UC San Diego, Geochemist Ralph Keeling is interviewed for the video series “Climate Changers: Hot Lessons and Cool Solutions.” Continue reading Ralph Keeling on Crossing 400 in new State of California Video Interview
So we’ve reached 400 ppm.… Now what happens? Continue reading Now What?