Carbon dioxide levels dating far back political speeddating uk
[8 Ways Global Warming Is Already Changing the World]During the ice ages, carbon dioxide levels in the atmosphere were around 200 ppm.And during the interglacial periods — the planet is currently in an interglacial period — levels were around 280 ppm, according to NASA.But it also confirms many researchers' suspicion that higher carbon dioxide levels coincided with warmer intervals during the study period.The authors show that peak CO is at 385 parts per million, or 38% higher.
On Saturday (May 11), the levels of the greenhouse gas reached 415 parts per million (ppm), as measured by the National Oceanic and Atmospheric Administration's Mauna Loa Observatory in Hawaii.
Scientists at the observatory have been measuring atmospheric carbon dioxide levels since 1958.
But because of other kinds of analysis, such as those done on ancient air bubbles trapped in ice cores, they have data on levels reaching back 800,000 years.
"We know from looking at much older climate records that large and rapid increase in CO in the past, (about 55 million years ago) caused large extinction in bottom-dwelling ocean creatures, and dissolved a lot of shells as the ocean became acidic," he said.
"We're heading in that direction now." The idea to approximate past carbon dioxide levels using boron, an element released by erupting volcanoes and used in household soap, was pioneered over the last decade by the paper's coauthor Gary Hemming, a researcher at Lamont-Doherty and Queens College.
The measurement is the highest seasonal peak recorded in 61 years of observations on top of Hawaii's largest volcano and the seventh consecutive year of steep global increases in concentrations of carbon dioxide (CO), according to data published today by NOAA and Scripps Institution of Oceanography.