From Climate Central:
In 1958, Charles David Keeling began making daily measurements of the concentration of atmospheric carbon dioxide (CO2) at the Mauna Loa Observatory on the Big Island of Hawaii. These measurements were begun as part of a one-year initiative, the International Geophysical Year, but because of Keeling’s persistence, the daily record has continued through the present, almost without interruption. The Mauna Loa record, now known as the Keeling Curve, continues to be collected under the direction of Keeling’s son, Ralph.
Last year, atmospheric carbon dioxide briefly crossed 400 parts per million for the first time in human history. However, it didn’t cross that threshold until mid-May. This year’s first 400 ppm reading came a full two months earlier this past week and the seeming inexorable upward march is likely to race past another milestone next month.
“We’re already seeing values over 400. Probably we’ll see values dwelling over 400 in April and May. It’s just a matter of time before it stays over 400 forever,” said Ralph Keeling in a blog post.
To preserve a livable planet, climate scientists tell us we must reduce the amount of CO2 in the atmosphere from its current level of 400 parts per million to below 350 ppm.
Right-wing Republicans remain unconcerned. Recently Congresswoman Marsha Blackburn (R-TN), the vice chair of the notoriously anti-climate change House Energy and Commerce Committee, said on “Meet the Press”: “Now, you know, when you look at the social cost of carbon, and there is a lot of ambiguity around that, what you also need to be doing is looking at the benefits of carbon and what that has on increased agricultural production.”
“The President should realize that Congress has taken action” on climate change policies, Blackburn said. “We have said no.”
World’s Oldest Direct Measure Of Atmospheric CO2 May Lose Its Funding