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When will the global CO2 concentration reach 400ppm?

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400ppm CO2 date

(closed)

Predicted: April 01, 2015

Actual: April 01, 2015

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December 31, 2016 @ 10:00pm PST

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Science

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16

Most by: bobdevine (5 predictions)

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job   •   Fri Mar 06 2015 at 03:57am PST

Recent Global CO2
January 2015: 400.14 ppm
January 2014: 397.42 ppm
Last updated: March 5, 2015

http://www.esrl.noaa.gov/gmd/ccgg/trends/global.html

bobdevine   •   Thu Feb 26 2015 at 09:09pm PST

NOTE — I’m waiting for the official statistics on global CO2. but based on daily data, it looks like the 400ppm threshold has been hit.

I’ll close this question as soon as I get firm numbers.

bobdevine   •   Thu Feb 26 2015 at 08:51pm PST

historical trend

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400ppm CO2 date