Support the Arctic Sea Ice Forum and Blog

Author Topic: 2021 Mauna Loa CO2 levels  (Read 689 times)

Stephan

  • Nilas ice
  • Posts: 1464
    • View Profile
  • Liked: 520
  • Likes Given: 246
2021 Mauna Loa CO2 levels
« on: January 03, 2021, 07:53:01 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.
It is too late just to be concerned about Climate Change

Stephan

  • Nilas ice
  • Posts: 1464
    • View Profile
  • Liked: 520
  • Likes Given: 246
Re: 2021 Mauna Loa CO2 levels
« Reply #1 on: January 10, 2021, 06:51:45 PM »
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.

It is time for an update of Mauna Loa CO2 weekly average.

Week beginning on January 3, 2021:     415.25 ppm
Weekly value from 1 year ago:              413.39 ppm
Weekly value from 10 years ago:           391.73 ppm
Last updated: January 10, 2021

The annual increase of 1.86 ppm is much lower than expected, partly due to my not well matching guess of last year's value (413.39 instead of 413.0 ppm). The increase is also lower than the average of the last 10 years (2.35 ppm).
Jan 05 and Jan 08 had lower values than the other days, partly due to high intra-day variability.

Outlook:
Last year next week had an average of 413.3 ppm. An increase of 2.3 ± 0.25 ppm seems to be likely.
It is too late just to be concerned about Climate Change

Stephan

  • Nilas ice
  • Posts: 1464
    • View Profile
  • Liked: 520
  • Likes Given: 246
Re: 2021 Mauna Loa CO2 levels
« Reply #2 on: January 17, 2021, 06:48:29 PM »
Outlook:
Last year next week had an average of 413.3 ppm. An increase of 2.3 ± 0.25 ppm seems to be likely.
Sunday evening - time for an update of Mauna Loa CO2 levels.

Week beginning on January 10, 2021:     414.83 ppm
Weekly value from 1 year ago:               412.76 ppm
Weekly value from 10 years ago:            390.64 ppm
Last updated: January 17, 2021

The annual increase is at 2.07 ppm, higher than last week but lower than the 10 y average of 2.42 ppm/a. After some stable days at the beginnig of the week the last two days were "unavailable" with a very high intra-day variability.
An outlook seems not to be reasonable this week.

It is too late just to be concerned about Climate Change