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When will the first weekly average of Mauna Loa CO2 be over 420 ppm?

April 2021 or earlier
4 (10.5%)
May 2021
15 (39.5%)
Feb-March 2022
5 (13.2%)
April 2022
5 (13.2%)
May 2022
5 (13.2%)
not before 2023
4 (10.5%)

Total Members Voted: 37

Voting closed: February 04, 2021, 09:43:00 PM

Author Topic: 2020 Mauna Loa CO2 levels  (Read 34430 times)

Tom_Mazanec

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Re: 2020 Mauna Loa CO2 levels
« Reply #250 on: December 27, 2020, 10:14:47 PM »
Thanks for all the 2020 work.  :)
You're welcome, kassy.
I'll keep on my weekly CO2 posting as well as the monthly updates on CO2, CH4, N2O and SF6 until all of them decrease on a year-to-year basis.  ;)
You'll be posting for a llloooonnng time.
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Stephan

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Re: 2020 Mauna Loa CO2 levels
« Reply #251 on: January 03, 2021, 07:51:24 PM »
Outlook:
Last year next week had an average of ca. 413.0 ppm. An increase of 2.25 ± 0.25 seems likely.

The first Sunday evening of a new decade, and time to start a new thread on Mauna Loa CO2 levels.

Week beginning on December 27, 2020:     415.09 ppm
Weekly value from 1 year ago:                   412.80 ppm
Weekly value from 10 years ago:               390.00 ppm
Last updated: January 3, 2021

The annual increase of 2.29 ppm is as expected last week and lower than the 10 y average of 2.51 ppm/a.

Last week returned to stable values. As usual for this time of the year the values increase from day to day.

Outlook:
The first week of 2020 had an average of 413.0 ppm. Therefore I expect an annual increase of 2.40 ± 0.20 ppm in the forthcoming week.

Cross-posted into the "2021 Mauna Loa" thread. Please leave comments and additions there.

Please also keep in mind that I cannot move the poll which runs until 4th of February. So it stays here.
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Stephan

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Re: 2020 Mauna Loa CO2 levels
« Reply #252 on: January 12, 2021, 10:32:30 PM »
Here comes the official December 2020 average from Mauna Loa.

December 2020:       414.02 ppm
December 2019:       411.76 ppm
Last updated: January 12, 2021

The CO2 concentration has increased by 2.26 ppm in the last 12 months. This is lower than the 10 y average of 2.423 ppm/a.
It is too late just to be concerned about Climate Change