Weekly means for atmospheric CO2 originate from the NOAA Earth System Research Laboratory (ESRL) and its Mauna Loa Observatory in Hawaii.

 

Weekly CO2

  Mauna Loa Observatory | NOAA-ESRL

Period

Week

Atmospheric CO2

Last Week

March 15 - 21, 2020

414.28 ppm

1 Year Ago

March 15 - 21, 2019

411.77 ppm

10 Years Ago

March 15 - 212010

391.23 ppm

  Data Updated:  March 24, 2020
  NOAA dataset: Web + .txt

weekly mean concentrations  |  ppm = parts per million

 

NOAA-ESRL and Scripps CO2 provide continually-updated graphics with daily and weekly data points plotted over multiple time periods.  Use the tabs below to view these graphics as well as links to the NOAA and Scripps websites.

Recent data is preliminary.  NOAA-ESRL is the only weekly dataset with values updated in real time.  Scripps CO2 posts a weekly CO2 dataset that is updated less frequently.

 

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