Talk:Carbon dioxide in Earth's atmosphere

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A news item involving Carbon dioxide in Earth's atmosphere was featured on Wikipedia's Main Page in the In the news section on 12 May 2013.

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Section sizes

Section size for Carbon dioxide in Earth's atmosphere (32 sections)
Section name	Byte count	Section total
(Top)	8,043	8,043
Current concentration and future trends	492	11,893
Current situation	5,484	5,484
Annual and regional fluctuations	2,321	2,321
Measurements and predictions made in the recent past	3,596	3,596
Measurement techniques	1,530	6,381
Data networks	2,183	2,183
Analytical methods to investigate sources of CO2 markup removed; cannot link (help)	2,668	2,668
Causes of the current increase	38	7,388
Anthropogenic CO2 emissions markup removed; cannot link (help)	7,350	7,350
Roles in natural processes on Earth	43	12,713
Greenhouse effect	5,587	5,587
Carbon cycle	4,813	7,083
Oceanic carbon cycle	2,270	2,270
Effects of current increase	35	3,235
Direct effects	990	1,999
Temperature rise on land	126	126
Temperature rise in oceans	164	164
Ocean acidification	78	78
CO2 fertilization effect markup removed; cannot link (help)	149	149
Other direct effects	492	492
Indirect effects and impacts	1,201	1,201
Approaches for reducing CO2 concentrations markup removed; cannot link (help)	1,770	1,770
Concentrations in the geologic past	5,479	24,521
Drivers of ancient-Earth CO2 concentration markup removed; cannot link (help)	979	979
Photosynthesis in the geologic past	3,198	3,198
Measuring ancient-Earth CO2 concentration markup removed; cannot link (help)	7,654	14,865
600 to 400 million years ago	5,240	5,240
60 to 5 million years ago	1,971	1,971
See also	66	66
References	28	28
External links	731	731
Total	76,769	76,769

Wiki Education assignment: EEB 4611-Biogeochemical Processes-Spring 2024

This article was the subject of a Wiki Education Foundation-supported course assignment, between 16 January 2024 and 11 May 2024. Further details are available on the course page. Student editor(s): Floralepe (article contribs).

— Assignment last updated by LynSchwendy (talk) 03:29, 14 May 2024 (UTC)[reply]

Removed section on photosynthesis

This is a bold move but I don't think we need all this text about photosynthesis here, so I have removed it. Photosynthesis is part of the carbon cycle and is mentioned above. Details about photosynthesis belong at photosynthesis and not in this article. This is the text that I've removed:

Photosynthesis

Carbon dioxide in the Earth's atmosphere is essential to life and to most of the planetary biosphere. The average rate of energy capture by photosynthesis globally is approximately 130 terawatts,^[1]^[2]^[3] which is about six times larger than the current power consumption of human civilization.^[4] Photosynthetic organisms also convert around 100–115 billion metric tonnes of carbon into biomass per year.^[5]^[6]

Photosynthetic organisms are photoautotrophs, which means that they are able to synthesize food directly from CO₂ and water using energy from light. However, not all organisms that use light as a source of energy carry out photosynthesis, since photoheterotrophs use organic compounds, rather than CO₂, as a source of carbon.^[7] In plants, algae and cyanobacteria, photosynthesis releases oxygen. This is called oxygenic photosynthesis. Although there are some differences between oxygenic photosynthesis in plants, algae, and cyanobacteria, the overall process is quite similar in these organisms. Some types of bacteria, however, carry out anoxygenic photosynthesis, which consumes CO₂ but does not release oxygen.^{[citation needed]}

Carbon dioxide is converted into sugars in a process called carbon fixation. Carbon fixation is an endothermic redox reaction, so photosynthesis needs to supply both the source of energy to drive this process and the electrons needed to convert CO₂ into a carbohydrate. This addition of the electrons is a reduction reaction. In general outline and in effect, photosynthesis is the opposite of cellular respiration, in which glucose and other compounds are oxidized to produce CO₂ and water, and to release exothermic chemical energy to drive the organism's metabolism. The two processes take place through a different sequence of chemical reactions, however, and in different cellular compartments.^{[citation needed]} EMsmile (talk) 15:13, 4 July 2024 (UTC)[reply]

References

^ Nealson KH, Conrad PG (December 1999). "Life: past, present and future". Philos. Trans. R. Soc. Lond. B Biol. Sci. 354 (1392): 1923–39. doi:10.1098/rstb.1999.0532. PMC 1692713. PMID 10670014.
^ Whitmarsh J, Govindjee (1999). "The photosynthetic process". In Singhal GS; Renger G; Sopory SK; Irrgang KD; Govindjee (eds.). Concepts in photobiology: photosynthesis and photomorphogenesis. Boston: Kluwer Academic Publishers. pp. 11–51. ISBN 978-0-7923-5519-9. Archived from the original on 14 August 2010. Retrieved 20 March 2014. 100 x 10¹⁵ grams of carbon/year fixed by photosynthetic organisms which is equivalent to 4 x 10¹⁸ kJ/yr = 4 x 10²¹J/yr of free energy stored as reduced carbon; (4 x 10¹⁸ kJ/yr) / (31,556,900 sec/yr) = 1.27 x 10¹⁴ J/yr; (1.27 x 10¹⁴ J/yr) / (10¹² J/sec / TW) = 127 TW.
^ Steger U, Achterberg W, Blok K, Bode H, Frenz W, Gather C, Hanekamp G, Imboden D, Jahnke M, Kost M, Kurz R, Nutzinger HG, Ziesemer T (2005). Sustainable development and innovation in the energy sector. Berlin: Springer. p. 32. ISBN 978-3-540-23103-5. Archived from the original on 2023-03-14. Retrieved 2023-03-14. The average global rate of photosynthesis is 130 TW (1 TW = 1 terawatt = 10¹² watt).
^ "World Consumption of Primary Energy by Energy Type and Selected Country Groups, 1980–2004". Energy Information Administration. 31 July 2006. Archived from the original (XLS) on 9 November 2006. Retrieved 2007-01-20.
^ Field CB, Behrenfeld MJ, Randerson JT, Falkowski P (July 1998). "Primary production of the biosphere: integrating terrestrial and oceanic components". Science. 281 (5374): 237–40. Bibcode:1998Sci...281..237F. doi:10.1126/science.281.5374.237. PMID 9657713. Archived from the original on 2018-09-25. Retrieved 2023-03-14.
^ "Photosynthesis". McGraw-Hill Encyclopedia of Science & Technology. Vol. 13. New York: McGraw-Hill. 2007. ISBN 978-0-07-144143-8.
^ Bryant DA, Frigaard NU (November 2006). "Prokaryotic photosynthesis and phototrophy illuminated". Trends Microbiol. 14 (11): 488–96. doi:10.1016/j.tim.2006.09.001. PMID 16997562.

EMsmile (talk) 15:13, 4 July 2024 (UTC)[reply]

[pmid10670014-1] Nealson KH, Conrad PG (December 1999). "Life: past, present and future". Philos. Trans. R. Soc. Lond. B Biol. Sci. 354 (1392): 1923–39. doi:10.1098/rstb.1999.0532. PMC 1692713. PMID 10670014.

[Whitmarsh_Govindjee_1999-2] Whitmarsh J, Govindjee (1999). "The photosynthetic process". In Singhal GS; Renger G; Sopory SK; Irrgang KD; Govindjee (eds.). Concepts in photobiology: photosynthesis and photomorphogenesis. Boston: Kluwer Academic Publishers. pp. 11–51. ISBN 978-0-7923-5519-9. Archived from the original on 14 August 2010. Retrieved 20 March 2014. 100 x 10¹⁵ grams of carbon/year fixed by photosynthetic organisms which is equivalent to 4 x 10¹⁸ kJ/yr = 4 x 10²¹J/yr of free energy stored as reduced carbon; (4 x 10¹⁸ kJ/yr) / (31,556,900 sec/yr) = 1.27 x 10¹⁴ J/yr; (1.27 x 10¹⁴ J/yr) / (10¹² J/sec / TW) = 127 TW.

[Steger_2005-3] Steger U, Achterberg W, Blok K, Bode H, Frenz W, Gather C, Hanekamp G, Imboden D, Jahnke M, Kost M, Kurz R, Nutzinger HG, Ziesemer T (2005). Sustainable development and innovation in the energy sector. Berlin: Springer. p. 32. ISBN 978-3-540-23103-5. Archived from the original on 2023-03-14. Retrieved 2023-03-14. The average global rate of photosynthesis is 130 TW (1 TW = 1 terawatt = 10¹² watt).

[EIA-4] "World Consumption of Primary Energy by Energy Type and Selected Country Groups, 1980–2004". Energy Information Administration. 31 July 2006. Archived from the original (XLS) on 9 November 2006. Retrieved 2007-01-20.

[pmid9657713-5] Field CB, Behrenfeld MJ, Randerson JT, Falkowski P (July 1998). "Primary production of the biosphere: integrating terrestrial and oceanic components". Science. 281 (5374): 237–40. Bibcode:1998Sci...281..237F. doi:10.1126/science.281.5374.237. PMID 9657713. Archived from the original on 2018-09-25. Retrieved 2023-03-14.

[ps-6] "Photosynthesis". McGraw-Hill Encyclopedia of Science & Technology. Vol. 13. New York: McGraw-Hill. 2007. ISBN 978-0-07-144143-8.

[bryantfrigaard-7] Bryant DA, Frigaard NU (November 2006). "Prokaryotic photosynthesis and phototrophy illuminated". Trends Microbiol. 14 (11): 488–96. doi:10.1016/j.tim.2006.09.001. PMID 16997562.

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