Talk:Hydrogen cycle

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Wiki Education Foundation-supported course assignment

This article was the subject of a Wiki Education Foundation-supported course assignment, between 8 January 2019 and 23 April 2019. Further details are available on the course page. Student editor(s): Lawrenjk.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 00:06, 17 January 2022 (UTC)[reply]

Untitled

This article doesn't tell us anything about the hydrogen cycle (if it exists). The external link is a lecture on the carbon cycle.

I've never heard of it, wikified the article slightly--Alex 10:39, 28 September 2006 (UTC)[reply]

Article Makeover

Hi all, I've been doing research on the H2 cycle and microorganisms that utilize atmospheric H2 for the past 1.5 years. I really want to improve this article because it is not doing the H2 cycle justice--especially considering that H2 is a secondary GHG. I'd of course like help along the way, so let's keep this discussion alive as the page improves! Please message me via this page or my user page. Wikisyzygy (talk) 03:26, 14 December 2012 (UTC)[reply]

Hi Wikisyzygy, I like the changes you made except that for the first sentences of the lead section which is now missing. I believe the article would not be compatible without that according to WP:BOLDTITLE, since the lead section is now very confusing. Are you going to add a brand new lead section or revert the old one? The Ocean (talk) 21:24, 30 December 2012 (UTC)[reply]

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Proposed hydrogen cycle updates

I would like to increase this page's coverage to include additional aspects relevant to the hydrogen cycle. While the elemental hydrogen page is robust and describes many processes related to the natural and anthropogenic fluxes of hydrogen on Earth, it only includes limited discussion biogeochemical reactions. I think this cycling-specific article should describe these processes and their interdependencies in greater detail. Currently, this page really only includes interspecies hydrogen transfer (IHT) as an example of a biologically mediated process, and I would like to expand it along the following draft framework over the coming weeks:

Introduction
- More general introduction to terrestrial hydrogen cycling prior to IHT discussion
- Links to the general hydrogen page should be established
Sources & Sinks
- Elaborate on the current list, tie to microbial metabolisms (expanded on below) along with abiotic and anthropogenic activities (without duplicating similar information on the Hydrogen page). Include geologic scale processes, e.g. serpentinization, atmospheric escape
Relevant Metabolisms
- flux of water / light reactions of photosynthesis. relate to carbon/hydrocarbon cycle
- influences of sulfate reduction, hydrogen oxidation, methanogenesis on hydrogen cycle
Global Climate Implications
- expand upon current section describing hydrogen and methane interaction in the atmosphere
Broader context
- Link to Hydrothermal vent, Abiogenesis, redox discussions
- Astrobiology: implications of evidence for the operation of a hydrogen cycle on other bodies warrants mentioning
References
- Add inline citations to current research
- Merge the duplicative references and bibliography sections
General: Improve article organization and flow. Improve relevance of 'see also' section and 'external links' sections.

Lawrenjk (talk) 15:48, 10 February 2019 (UTC)[reply]

Updating to add a draft list of references to support the above material:

Catling DC, Zahnle KJ, McKay C (August 2001). "Biogenic methane, hydrogen escape, and the irreversible oxidation of early Earth". Science. 293 (5531): 839–43. Bibcode:2001Sci...293..839C. doi:10.1126/science.1061976. PMID 11486082.
Falkowski PG, Fenchel T, Delong EF (May 2008). "The microbial engines that drive Earth's biogeochemical cycles". Science. 320 (5879): 1034–9. Bibcode:2008Sci...320.1034F. doi:10.1126/science.1153213. PMID 18497287.
Ghirardi ML, Posewitz MC, Maness PC, Dubini A, Yu J, Seibert M (2007). "Hydrogenases and hydrogen photoproduction in oxygenic photosynthetic organisms". Annual Review of Plant Biology. 58: 71–91. doi:10.1146/annurev.arplant.58.032806.103848. PMID 17150028.
Hügler M, Sievert SM (2011). "Beyond the Calvin cycle: autotrophic carbon fixation in the ocean". Annual Review of Marine Science. 3: 261–89. Bibcode:2011ARMS....3..261H. doi:10.1146/annurev-marine-120709-142712. PMID 21329206.
Jørgensen BB (July 2001). "Biogeochemistry: Space for hydrogen". Nature. 412 (6844): 286–7, 289. doi:10.1038/35085676. PMID 11460146.
Khetkorn W, Rastogi RP, Incharoensakdi A, Lindblad P, Madamwar D, Pandey A, Larroche C (November 2017). "Microalgal hydrogen production–A review". Bioresource Technology. 243: 1194–206. doi:10.1016/j.biortech.2017.07.085. PMID 28774676.
Kirchman DL (2012). Processes in Microbial Ecology. Oxford University Press. doi:10.1093/acprof:oso/9780199586936.001.0001. ISBN 978-0-19-162422-3.
Konn C, Charlou JL, Holm NG, Mousis O (May 2015). "The production of methane, hydrogen, and organic compounds in ultramafic-hosted hydrothermal vents of the Mid-Atlantic Ridge". Astrobiology. 15 (5): 381–99. Bibcode:2015AsBio..15..381K. doi:10.1089/ast.2014.1198. PMC 4442600. PMID 25984920.
McCollom TM, Donaldson C (June 2016). "Generation of Hydrogen and Methane during Experimental Low-Temperature Reaction of Ultramafic Rocks with Water". Astrobiology. 16 (6): 389–406. Bibcode:2016AsBio..16..389M. doi:10.1089/ast.2015.1382. PMID 27267306.
McCollom TM, Seewald JS (February 2007). "Abiotic synthesis of organic compounds in deep-sea hydrothermal environments". Chemical Reviews. 107 (2): 382–401. doi:10.1021/cr0503660. PMID 17253758.
Novelli PC, Lang PM, Masarie KA, Hurst DF, Myers R, Elkins JW (December 1999). "Molecular hydrogen in the troposphere: Global distribution and budget". Journal of Geophysical Research: Atmospheres. 104 (D23): 30427–44. Bibcode:1999JGR...10430427N. doi:10.1029/1999JD900788.
Petersen JM, Zielinski FU, Pape T, Seifert R, Moraru C, Amann R, Hourdez S, Girguis PR, Wankel SD, Barbe V, Pelletier E, Fink D, Borowski C, Bach W, Dubilier N (August 2011). "Hydrogen is an energy source for hydrothermal vent symbioses". Nature. 476 (7359): 176–80. Bibcode:2011Natur.476..176P. doi:10.1038/nature10325. PMID 21833083.
Seewald JS (April 2017). "Detecting molecular hydrogen on Enceladus". Science (New York, N.Y.). 356 (6334): 132–133. Bibcode:2017Sci...356..132S. doi:10.1126/science.aan0444. PMID 28408557.
Sievert SM, Vetriani C (March 2012). "Chemoautotrophy at deep-sea vents: past, present, and future". Oceanography. 25 (1): 218–33. doi:10.5670/oceanog.2012.21. JSTOR 24861161.

Lawrenjk (talk) 22:40, 18 February 2019 (UTC)[reply]