Latest Daily CO2

Mauna Loa Observatory  |  Atmospheric CO2 Concentrations

Nov 13  2019

411.19 ppm

NOAA-ESRL
Nov 13  2018

407.79 ppm

NOAA-ESRL

daily mean concentrations  |  ppm = parts per million

 

RECORDS AS OF NOVEMBER 13, 2019
MAUNA LOA OBSERVATORY, HAWAII

All-Time Record Highs for CO2 Daily Averages

 

415.70 ppm on May 15, 2019 (Scripps)
415.64 ppm on May 15, 2019 (NOAA-ESRL)

415.50 ppm on May 13, 2019 (Scripps)
415.40 ppm on May 13, 2019 (NOAA-ESRL)
415.39 ppm on May 12, 2019 (Scripps)
415.27 ppm on May 12, 2019 (NOAA-ESRL)
415.26 ppm on May 11, 2019 (Scripps)
414.94 ppm on May 1, 2019 (Scripps)
414.88 ppm on May 1, 2019 (NOAA-ESRL)
414.84 ppm on March 18, 2019 (NOAA-ESRL) & May 2, 2019 (Scripps) 

Correction of the May 4 2019 Post re: Record CO2 level above 415 ppm
CO2.Earth Facebook Correction | @CO2_Earth Twitter Correction  | @Keeling_Curve Twitter Correction

  

Yearly Records for CO2 Daily Averages

Annual Records Since 2015

2019 (so far)


415.70 ppm on May 15 (Scripps)
415.64 ppm on May 15 (NOAA-ESRL)

415.50 ppm on May 13 (Scripps)
415.40 ppm on May 13 (NOAA-ESRL)
415.39 ppm on May 12 (Scripps)
415.27 ppm on May 12 (NOAA-ESRL)
415.26 ppm on May 11 (Scripps)
414.94 ppm on May 1 (Scripps)
414.88 ppm on May 1 (NOAA-ESRL)
414.84 ppm on March 18  (NOAA-ESRL) & May 2 (Scripps)

2018

 412.60 ppm on May 14 (Scripps)
412.45 ppm on May 14 (NOAA-ESRL)
412.37 ppm on April 23 (NOAA-ESRL)

2017

412.63 ppm on April 26 (NOAA-ESRL)
411.27 ppm on May 15 (NOAA-ESRL)

2016

409.44 ppm on April 9 (Scripps)
409.39 ppm on April 8 (Scripps)

2015

404.84 ppm on April 13 (Scripps)

 

When available, daily average values for carbon dioxide in the atmosphere are posted here as a year-over-year comparison.  Measurements are made by two independent CO2 monitoring programs (NOAA and Scripps) at the Mauna Loa Observatory in Hawaii, about 3400 metres above sea level.

CO2.Earth presents a year-over-year comparison of recent daily readings for public education purposes.  Tracking these readings can provide opportunities for in-the-moment learning about the seasonal cycle and trend for atmospheric CO2.  See the "notes" tab on this page for important information about the daily CO2 data reposted here.

 

Explore the tabs below to view visuals and links associated with the latest CO2 readings from Mauna Loa.

 

CO2 Past.  CO2 Present.  CO2 Future.