Talk:Carbon dioxide

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December 10, 2005	Good article nominee	Listed
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Conversion of v/v to m/m

I have corrected the conversion of ppm by volume to ppm by mass. The original note claims that this conversion could be performed by multiplying by the ratio of the molecular masses of CO2 and Air. The correct equation multiplies by the ratio of the densities of CO2 and Air. The difference between the density of moist air and the density of dry air is a non-trivial factor, and so volume can not be disregarded. A quick dimensional analysis will confirm that this is the correct method:

(m/m)=(v/v)(m/v)(v/m)

Or to be more explicit: mCO2/mAir = (vCO2/vAir) (vAir/mAir) (mCO2/vCO2)

Taking this approach usually gets you a ppm-m that is about 1.9 times greater than the ppm-v.

https://www.lenntech.com/calculators/ppm/converter-parts-per-million.htm

Too many links under See also

Some of the See also links are far too tenuous for the article and need culling. 101.98.39.246 (talk) 20:52, 8 October 2022 (UTC)[reply]

I agree with you. I've removed some but I think there are still too many. Please go ahead and remove more. EMsmile (talk) 11:13, 9 December 2022 (UTC)[reply]

I don't bother logging in any more (too many bad editors) and the article is protected. 43.249.196.226 (talk) 06:58, 5 January 2023 (UTC)[reply]

Regarding the section: In Earth's atmosphere

I am planning to do some work on the article carbon dioxide in Earth's atmosphere and was just looking around to see what links to there. This article links to there and actually has a section called "In Earth's atmosphere". In order to reduce repetition and overlap I'd like to suggest that we synchronise the two articles. Perhaps what would work best is to use an excerpt from carbon dioxide in Earth's atmosphere, and to move/merge the existing text from here to there. Otherwise we'd have to update content in two place which would be tedious. EMsmile (talk) 14:11, 26 November 2021 (UTC)[reply]

What do any of the people watching this page think of my proposal from 26 Nov 21? If no objections, I can try to tackle this soon-ish. EMsmile (talk) 11:22, 22 February 2022 (UTC)[reply]

Good idea in my opinion and I encourage you to go ahead. Not sure what you mean by using an "excerpt" from carbon dioxide in Earth's atmosphere instead of the present section. Maybe you are thinking of adapting that article's lead for use in this section? In any case, I appreciate the massive effort and skill you have previously put into organizing and improving articles related to climate and the environment. –MadeOfAtoms (talk) 21:09, 22 February 2022 (UTC)[reply]

WP:excerpt allow you to transclude the same paragraphs in multiple articles. In this case, I'd be okay with it after the lead section is sufficiently improved with citations from this article.

Currently, the information of this article seems to be of higher quality. The 'in earths atmosphere' lead is not fully cited, and contains outdated information (the 30-40% again).

A complete replacement would reduce the text from 6 to 2 paragraphs. That may be too little in comparison with overview sources? I think the first 5 are valuable. You'll probably want to write at least one more paragraph to better summarise the 'in Earth's atmosphere' article, but making sure there isn't too much overlap with other sections in the current article. A challenge for sure :). Femke (talk) 17:20, 23 February 2022 (UTC)[reply]

Update: I am coming back to this work now. I am currently reworking carbon dioxide in Earth's atmosphere. Once I'm done with that, I plan to improve this section here, probably by using the excerpt tool from the other article but carefully checking which text block and references are more up to date (the one here or the one there) and then hopefully combining the best content in a clever way. EMsmile (talk) 11:19, 9 December 2022 (UTC)[reply]

@Femke: I've now removed the sentence with the 30-40% from the lead of the carbon dioxide in Earth's atmosphere article (old sentence was "Between 30% and 40% of the CO2 released by humans into the atmosphere dissolves into the oceans"). I plan on reworking that lead and then checking if it becomes suitable to be an excerpt for here. What did you mean with "I think the first 5 are valuable."? (sorry for asking 10 months later). EMsmile (talk) 12:14, 9 December 2022 (UTC)[reply]

Another update: I've now copied the text from the section "in Earth's atmosphere" to the lead of carbon dioxide in Earth's atmosphere. There, I have reworked it a bit (some further editing is still needed). After that, I plan to bring it back here by transcribing it in an excerpt. So it means the end result will be rather similar to how it currently looks (about 4-5 paragraphs long; about 500 words) but in future the content would have to be updated in only one article, not in two: Future updates about CO2 in the atmosphere would be made at carbon dioxide in Earth's atmosphere and then automatically be shown here. EMsmile (talk) 12:57, 9 December 2022 (UTC)[reply]

Update: I've replaced this text with an excerpt, after having moved the text to carbon dioxide in Earth's atmosphere. For now I have taken the entire lead but we could instead only take the first 4 paragraphs for example.EMsmile (talk) 11:55, 12 December 2022 (UTC)[reply]

Rearranged structure a bit

I've rearranged the structure a bit today. I hope I wasn't too bold but I think it's a more logical flow this way. I've written in the edit summaries an explanation for each change. Please comment here if you disagree with any of those changes or if things need further discussion. EMsmile (talk) 22:22, 9 December 2022 (UTC)[reply]

Semi-protected edit request on 11 January 2023

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The article states in the Photosynthesis section that photosynthesis is used to produce glucose from carbon dioxide. Not quite true. Photosynthesis does not involve carbon dioxide. Light energy capture by chlorophyll is used the create ATP and produces oxygen.

ATP is then used in a separate reaction to fix carbon dioxide.

It's often a school pupil misconception of over simplifying photosynthesis, that has to be unlearnt at later stages of education! 101.53.219.101 (talk) 03:56, 11 January 2023 (UTC)[reply]

Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format and provide a reliable source if appropriate. Lightoil (talk) 08:42, 11 January 2023 (UTC)[reply]

75 % CO2 only kills insects and small animals?

"At the Bossoleto hot spring near Rapolano Terme in Tuscany, Italy, situated in a bowl-shaped depression about 100 m (330 ft) in diameter, concentrations of CO2 rise to above 75% overnight, sufficient to kill insects and small animals." Is there a decimal point missing or something? Given the other values in the article, like: 7 to 10 % CO2 causing suffocation in humans, I'd expect 75% to have more impact. Samorost1 (talk) 08:11, 1 March 2023 (UTC)[reply]