Talk:Oxygen cycle

message: I have been assigned to update and make additions to this Wikipedia page for a graduate course. The reference section is disorganized, mostly unnumbered, and links are broken or absent. The references are several decades old and we have more current data. I plan to update the data with current numbers and redo the reference section. I also plan to add historical and global context to the page as well as greater depth and more accessible explanations. If anyone has requests or trepidations please share them and I will accommodate if feasible. Rotheconrad (talk) 18:55, 15 February 2019 (UTC)
replies: text: Note that Resplandy et al. 2018 has been retracted on account of some methodological problems. See https://www.nature.com/articles/s41586-019-1585-5. ♦ J. Johnson (JJ) (talk) 22:16, 1 October 2019 (UTC)
thread_title:  Planning significant page update 

message: # Petsch, Steven (2014). "The global oxygen cycle". Treatise Geochem Second Ed. 10 (2014): 437-474. https://doi.org/10.1016/B978-0-08-095975-7.00811-1
# Huang, Jianping et al.  (2018). "The global oxygen budget and its future projection." Science Bulletin. 63 (18): 1180-1186. https://doi.org/10.1016/j.scib.2018.07.023
# Boyce, Daniel G.; Lewis, Marlon R.; Worm, Boris (2010). "Global phytoplankton decline over the past century." Nature. 466 (7306): 591-596. https://doi.org/10.1038/nature09268
# Behrenfeld, Michael J. et al.  (2006)l. "Climate-driven trends in contemporary ocean productivity." Nature. 444 (7120): 752-755. https://doi.org/10.1038/nature05317
# Lenton, Timothy M.; Watson, Andrew J. (2000). "Redfield revisited: 2. What regulates the oxygen content of the atmosphere?." Global Biogeochemical Cycles. 14 (1): 249-268. https://doi.org/10.1029/1999GB900076
# Resplandy, L. et al.  (2018). "Quantification of ocean heat uptake from changes in atmospheric O 2 and CO 2 composition." Nature. 563 (7729): 105-108. https://doi.org/10.1038/s41586-018-0651-8
# Hu, Qingyang, et al. (2016). "FeO 2 and FeOOH under deep lower-mantle conditions and Earth’s oxygen–hydrogen cycles." Nature. 534 (7606): 241-244. https://doi.org/10.1038/nature18018
# Falkowski, Paul G.  (2011). "The biological and geological contingencies for the rise of oxygen on Earth." Photosynth Res. 107 (1): 7-10. https://doi.org/10.1007/s11120-010-9602-4
# Falkowski, Paul G.; Godfrey, Linda V. (2008). "Electrons, life and the evolution of Earth's oxygen cycle." Philosophical Transactions of the Royal Society B: Biological Sciences. 363 (1504): 2705-2716. https://doi.org/10.1098/rstb.2008.0054
# Keeling, Ralph F.; Körtzinger, Arne; Gruber, Nicolas (2010). "Ocean deoxygenation in a warming world". Annual Review of Marine Science. 2 (2010): 199-229. https://doi.org/10.1146/annurev.marine.010908.163855
# Holland, Heinrich D. (2006). "The oxygenation of the atmosphere and oceans." Philosophical Transactions of the Royal Society B: Biological Sciences. 361 (1470): 903-915. https://doi.org/10.1098/rstb.2006.1838
# Lyons, Timothy W.; Reinhard, Christopher T.; Planavsky, Noah J. (2014). "The rise of oxygen in Earth’s early ocean and atmosphere." Nature. 506 (7488): 307. https://doi.org/10.1038/nature13068
# Reinhard, Christopher T.; et al. (2016). "Earth’s oxygen cycle and the evolution of animal life." Proceedings of the National Academy of Sciences. 113 (32): 8933-8938. https://doi.org/10.1073/pnas.1521544113
Rotheconrad (talk) 21:43, 22 February 2019 (UTC)
replies: text: Note that Resplandy et al. 2018 has been retracted on account of some methodological problems. See https://www.nature.com/articles/s41586-019-1585-5. ♦ J. Johnson (JJ) (talk) 22:16, 1 October 2019 (UTC)
thread_title:  Planned References to use for page update: 

message: Seasonal O2/CO2 ratios:
I am trying to find out how much, if any, the O2 ratio in the atmosphere changes with the seasons.  Some sources show O2/CO2 ratios varying considerably in the summer and winter in each hemisphere.  Other sources say that there is no seasonal variability,and that the O2 level is always around 20%.  What's the true story here?
Why no hydrosphere?
Just wondering why the overview paragraph and the image make no reference to the hydrosphere. Surely this is a significant resevoir for oxygen given that there is dissolved O2 and CO2 and there is H2O itself. - Drstuey 07:28, 22 Nov 2004 (UTC)
thread_title:  Stuff at the beginning of the talk page, beforehand without heading 

message: I noticed that the stoichiometry of the equation for formation of rusts through weathering was incorrect.
4FeO + 3O2 → 2Fe2O3
I've corrected it as it shouldn't be controversial!  —Preceding unsigned comment added by Parallelepipete (talk • contribs) 11:22, 14 August 2008 (UTC)
thread_title:  Oxidation of iron ores - error in chemical equation

message: There is something not properly noted here: the water. It's ridiculous to include photolysis in the balancing, but not, for example, the watery part of photosynthesis and metabolism. Also oceans are a far bigger reservoir than the atmosphere (I do not mean the soluble O2 here.). -- Tomdo08 (talk) 03:51, 20 December 2010 (UTC)
thread_title:  Incomplete cycle 

message: According to the wikipedia article about phytoplankton, phytoplankton levels have been decreasing with about 1% every year the last 111 years ( which should correspond to decline of about 67% ). I have also read that the landmass covered by rain forests have decreased from about 14% to about 6% the last century ( which should correspond to a decline of about 43% ). As phytoplankton produces about 50% of the atmospheric oxygen while rain forests produce about 28% of the atmospheric oxygen, this should correspond to a decline of about 45% in global photosynthetic activity if I am right. I also calculated from the data in this article that without any photosynthetic activity the atmospheric oxygen will be depleted in 4666.67 years ( (1.4 * 10^18) / (3.0 * 10^14) ), but the usage of oxygen must also have increased due to the combustion of fossil fuels. Perhaps some information about this should be included in the article if my calculations are right.81.167.185.42 (talk) 12:36, 30 December 2010 (UTC)
thread_title:  Decline in oxygen levels. 

message: From articles I've read and videos I've watched the belief among oceanographers is that the amount of atmospheric O2 believed to be from ocean is somewhere between 50% and 80%  sources. One name in particular is Dr Charles Trick who said "Over 50%" as a conservative estimate. This wikipedia article uses data from 1980 and could probably use an update from a more contemporary source. 
Cheers  — Preceding unsigned comment added by 76.10.148.181 (talk) 19:09, 18 May 2013 (UTC)
thread_title:  Updating the sources data 

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thread_title:  External links modified (January 2018) 

message: the page currently states that the largest source of oxygen is photosynthesis.
This is incorrect.  Photosynthesis is not a source, it's a process.  The source is the actual organisms that carry out the process, and of these the largest source is phytoplankton.  — Preceding unsigned comment added by 122.56.26.1 (talk) 23:02, 9 October 2018 (UTC)
thread_title:  Semantics - source vs process 

message: as per Stephen Petranek at TEDxMidwest
https://www.youtube.com/watch?v=HEfpxiUIZPs - 16:20 "a marginal tree" and when that imaginary tree is cut, we will have broken the oxygen cycle.
Thy --SvenAERTS (talk) 02:17, 29 October 2018 (UTC)
thread_title:  How could we make the world's ecosystem Oxygen cycle to collapse? 

message: 1. Six different sources are listed in the Reference part, which is good but not enough in my opinion, especially only one of them is a published academic paper.
2. The First source is an article in Scientific American and has a link followed, but the link has already expired. I can't see the article by clicking the link provided.
3. Sources are a bit of outdated. Two Scientific American articles are published in 2003 and 1970 respectively and the academic paper is from a book published in 1980. More recent works is available, e.g. Kasting & Canfield, 2012.
4. The fourth source is actually notes taken in a class, which cannot be considered as very reliable.
Pengxiao Xu (talk) 20:32, 15 February 2019 (UTC)
thread_title:  Improvement can be made for the resources 

message: [1] Petsch, Steven (2003). "The Global Oxygen Cycle". Treatise on Geochemistry. 8:515-555 https://doi.org/10.1016/B0-08-043751-6/08159-7
[2] Reinhard, Christopher T., Planavsky, Noah J., Olson, Stephanie L., Lyons, Timothy W., and Erwin, Douglas H. (2016). "Earth’s Oxygen Cycle and the Evolution of Animal Life." Proceedings of the National Academy of Sciences 113(32): 8933-38. https://dx.doi.org/10.1073/pnas.1521544113
[3] Keeling, Ralph F. (1995). "The Atmospheric Oxygen Cycle: The Oxygen Isotopes of Atmospheric Co 2 and 0 2 and the 0 2 /N 2 Ratio." 33:1253. https://dx.doi.org/10.1029/95rg00438
[4] Kasting, James F. and Canfield, Donald E (2012). "The Global Oxygen Cycle." Fundamentals of Geobiology." ch7:92-104. https://doi.org/10.1002/9781118280874.ch7
[5] Holland, Heinrich D (2002). "Volcanic gases, black smokers, and the Great Oxidation Event." Geochimica et Cosmochimica Acta 66(21): 3811-3826. https://doi.org/10.1016/S0016-7037(02)00950-X
[6] Lasaga, Antonio C., and Hiroshi Ohmoto (2002). "The oxygen geochemical cycle: dynamics and stability." Geochimica et Cosmochimica Acta 66(3): 361-38. https://doi.org/10.1016/S0016-7037(01)00685-8
[7] Najjar, Raymond G., and Ralph Keeling F. (2000). "Mean annual cycle of the air‐sea oxygen flux: A global view." Global biogeochemical cycles 14(2): 573-584. https://doi.org/10.1029/1999GB900086
[8] Walker, James CG (1986). "Global geochemical cycles of carbon, sulfur and oxygen." Marine Geology 70(1-2): 159-174.https://doi.org/10.1016/0025-3227(86)90093-9
[9] Sleep, Norman H (2005). "Dioxygen over geological time." Metal Ions in Biological Systems, Biogeochemical Cycles of Elements. CRC Press, 43: 92-116. https://www.taylorfrancis.com/books/9780824751999/chapters/10.1201%2F9780824751999-7
[10] Betts, J. N., and Holland, H. D. (1991). "The oxygen content of ocean bottom waters, the burial efficiency of organic carbon, and the regulation of atmospheric oxygen." Global and planetary change. 5(1-2): 5-18. https://doi.org/10.1016/0921-8181(91)90123-E  — Preceding unsigned comment added by Pengxiao Xu (talk • contribs) 03:29, 23 February 2019 (UTC)
thread_title:  Some other references 

message: Up to my understanding, "by volume" related to non gases makes no sense.  Like in this sentence
"The lithosphere is 46.6% oxygen by volume",
and in some other ones.
Wlodr (talk) 09:09, 24 August 2019 (UTC)
thread_title:  "by volume" makes no sense 

message: A 2409:4042:2305:CD94:2EE7:7748:4F07:633F (talk) 18:33, 21 July 2022 (UTC)
thread_title:  Oxygen cycle 

message: Oxygen  cycle information 117.254.35.145 (talk) 04:16, 30 December 2023 (UTC)
thread_title:  Science