Carbon dioxide content in the air was 401.84 parts per million (ppm) on March 9. Measurements are taken daily at the Mauna Loa Observatory in Hawaii. A year ago the measurement was 398.40 ppm. The annual daily CO2 content in 2014 was 398.55. For 2013 the number was 396.48. The value for the first week of March 10 years ago was 381.56.
The project is under the direction of the Scripps Institution of Oceanography at the University of California at San Diego. You can find more information at www.http://scrippsco2.ucsd.edu/data/in_situ_co2/weekly_mlo.csv%20
More from Star Tribune
More from Star Tribune
More from Star Tribune
More from Star Tribune
More from Star Tribune
More From Star Tribune
More From Star Tribune
Election
In heated western Minn. GOP congressional primary, outsiders challenging incumbent
U.S. Rep. Michelle Fischbach has a solidly conservative voting record. But Steve Boyd, a Christian conservative who has never held public office, is gaining traction as an outsider.
Sports
Minnesota Sports Hall of Fame: A class-by-class list of all members
Who's in the Star Tribune Minnesota Sports Hall of Fame? From Bernie Bierman to the latest class, here's the list:
Sports
This retired journalist changed professional wrestling from Mankato
Norm Kietzer was a pioneer in professional wrestling journalism for 40 years.
High Schools
All-Metro Sports Awards: Here are the 2023 winners
The Star Tribune recognized the best of metro area high school athletes with its sixth annual All-Metro Sports Awards. Here are the 2023 winners, who were honored Wednesday night at Target Center.