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I was wondering what the motivation was for the alteration between these two forms. Naturally, the first time you use 12C, it's good to include it in parentheses (as you did), but after that the alteration still happens. (I'm referring to the general case here, e.g., 14N as well, not just 12C itself.) Was this deliberate? If so, why? I'm not overly concerned about this mind you, mainly curious. Ben Hocking ( talk| contribs) 13:39, 19 October 2007 (UTC)
The Suess effect also refers to the depletion of 13C which is due to the fact that plants prefer C12 to C13. See e.g. [1] [2] [3]. Jclerman, any reason why you have removed this in several places? -- Stephan Schulz 15:15, 19 October 2007 (UTC)
If the discussion of photosynthetic types is relevant to the topic (Suess effect), then it should be correct. CO2 discrimination and, in consequence the carbon isotope composition values of CAM plants, vary in a wide range spanning from C4 to C3. Jclerman ( talk) 05:32, 31 December 2007 (UTC)
Living plants and animals do not actually have the same ratio of 14C to 12C as atmospheric CO2. Just as organisms fractionate 13C from 12C, they also fractionate 14C. The magnitude of the 14C/12C fractionation is about twice that of the 13C/12C fractionation, because the difference in masses between 14C and 12C is about twice the difference in masses between 13C and 12C. An appropriate reference for this is Craig (1954) [1] St.scholasticus ( talk) 22:52, 4 May 2009 (UTC)
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I was wondering what the motivation was for the alteration between these two forms. Naturally, the first time you use 12C, it's good to include it in parentheses (as you did), but after that the alteration still happens. (I'm referring to the general case here, e.g., 14N as well, not just 12C itself.) Was this deliberate? If so, why? I'm not overly concerned about this mind you, mainly curious. Ben Hocking ( talk| contribs) 13:39, 19 October 2007 (UTC)
The Suess effect also refers to the depletion of 13C which is due to the fact that plants prefer C12 to C13. See e.g. [1] [2] [3]. Jclerman, any reason why you have removed this in several places? -- Stephan Schulz 15:15, 19 October 2007 (UTC)
If the discussion of photosynthetic types is relevant to the topic (Suess effect), then it should be correct. CO2 discrimination and, in consequence the carbon isotope composition values of CAM plants, vary in a wide range spanning from C4 to C3. Jclerman ( talk) 05:32, 31 December 2007 (UTC)
Living plants and animals do not actually have the same ratio of 14C to 12C as atmospheric CO2. Just as organisms fractionate 13C from 12C, they also fractionate 14C. The magnitude of the 14C/12C fractionation is about twice that of the 13C/12C fractionation, because the difference in masses between 14C and 12C is about twice the difference in masses between 13C and 12C. An appropriate reference for this is Craig (1954) [1] St.scholasticus ( talk) 22:52, 4 May 2009 (UTC)
References
Hello fellow Wikipedians,
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This message was posted before February 2018.
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(last update: 5 June 2024).
Cheers.— InternetArchiveBot ( Report bug) 23:18, 25 January 2018 (UTC)