Talk:Don Juan Pond

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Life Studies Controversial

Life[edit] Studies of lifeforms in the hypersaline (and/or brine) water of Don Juan Pond have been controversial.[4][5]

What does this mean? Can anyone explain? — Preceding unsigned comment added by 2604:2000:C591:1000:918F:6176:FDE5:9041 (talk) 15:45, 10 June 2017 (UTC)[reply]

Size

Anyone know how large it is? Deuar 21:38, 27 June 2007 (UTC)[reply]

Based on this picture (from here) I'd estimate about 100 feet across. Note the person on the right side of the photo. 72.226.71.138 (talk) 21:23, 16 February 2008 (UTC)[reply]

I've seen figures of cirka 300 × 100 m (984 × 328 ft) with a depth of 10 cm (4 in) a couple of times (Yamagata et al. 1967). This puts the area at around 0.03 km², though the pond's size varies. --Anshelm '77 (talk) 01:20, 25 February 2008 (UTC)[reply]

For the record, the bibliographic record of Yamagata et al. 1967: Yamagata, N., T. Torii, S. Murata: Report of the Japanese summer parties in Dry Valleys, Victoria Land, 1963-65; V - Chemical composition of lake waters. Antarctic Record 29: 53-75. --Ratzer (talk) 07:21, 23 October 2008 (UTC)[reply]

Mars

The comparison of life on Don Juan Pond brine with life on Mars' brine (recurring slope lineae) is not substantiated so I deleted the text and refs. The NY Times quotes Chris McKay saying nothing grows on the water of Don Juan Pond.^[1] Other than that, no cited paper compares the 2 brines, which by the way are indeed different: Mars' brine is perchlorate salts, while the Don Juan Pond is CaCl₂ and NaCl. In addition to that, there is the variable of atmospheric pressure. Cheers, BatteryIncluded (talk) 14:31, 30 September 2015 (UTC)[reply]

BTW, comparing their antifreeze properties has been done extensively in the literature, and would be useful here. BatteryIncluded (talk) 14:46, 30 September 2015 (UTC)[reply]

Thank you for your comments - and edits - Yes - agreed - no problem whatsoever - in case anyone may be interested, relevant references are noted below^[1]^[2]^[3]^[4]^[5]^[6] - Thanks again for your own comments - and - Enjoy! :) Drbogdan (talk) 14:56, 30 September 2015 (UTC)[reply]

References

^ ^a ^b Chang, Kenneth (28 September 2015). "NASA Says Signs of Liquid Water Flowing on Mars". New York Times. Retrieved 28 September 2015.
^ Siegel, B.Z.; McMurty, G.; Siegel, S.M.; Chen, J.; Larock, P. (30 August 1979). "Life in the calcium chloride environment of Don Juan Pond, Antarctica". Nature (journal). doi:10.1038/280828a0. Retrieved 30 September 2015.
^ Webster, Guy; Agle, DC; Brown, Dwayne; Cantillo, Laurie (28 September 2015). "NASA Confirms Evidence That Liquid Water Flows on Today's Mars". Retrieved 28 September 2015.
^ Ojha, Lujendra; Wilhelm, Mary Beth; Murchie, scortt L.; McEwen, Alfred S.; Wray, James J.; Hanley, Jennifer; Massé, Marion; Chojnacki, Matt (28 September 2015). "Spectral evidence for hydrated salts in recurring slope lineae on Mars". Nature Geoscience. doi:10.1038/ngeo2546. Retrieved 28 September 2015.
^ Staff (28 September 2015). "Video Highlight (02:58) - NASA News Conference - Evidence of Liquid Water on Today's Mars". NASA. Retrieved 30 September 2015.
^ Staff (28 September 2015). "Video Complete (58:18) - NASA News Conference - Water Flowing on Present-Day Mars". NASA. Retrieved 30 September 2015.

Salinity

This page lists Don Juan Pond as the second saltiest body of water on earth, but the article "List of bodies of water by salinity" ranks it sixth. Some clarifications somewhere would be nice. — Preceding unsigned comment added by 75.143.120.121 (talk) 22:25, 1 May 2020 (UTC)[reply]

[NYT-20150928-1] Chang, Kenneth (28 September 2015). "NASA Says Signs of Liquid Water Flowing on Mars". New York Times. Retrieved 28 September 2015.

[NAT-19790830-2] Siegel, B.Z.; McMurty, G.; Siegel, S.M.; Chen, J.; Larock, P. (30 August 1979). "Life in the calcium chloride environment of Don Juan Pond, Antarctica". Nature (journal). doi:10.1038/280828a0. Retrieved 30 September 2015.

[NASA-20150928-3] Webster, Guy; Agle, DC; Brown, Dwayne; Cantillo, Laurie (28 September 2015). "NASA Confirms Evidence That Liquid Water Flows on Today's Mars". Retrieved 28 September 2015.

[NG-20150928-4] Ojha, Lujendra; Wilhelm, Mary Beth; Murchie, scortt L.; McEwen, Alfred S.; Wray, James J.; Hanley, Jennifer; Massé, Marion; Chojnacki, Matt (28 September 2015). "Spectral evidence for hydrated salts in recurring slope lineae on Mars". Nature Geoscience. doi:10.1038/ngeo2546. Retrieved 28 September 2015.

[NASA-20150928b-5] Staff (28 September 2015). "Video Highlight (02:58) - NASA News Conference - Evidence of Liquid Water on Today's Mars". NASA. Retrieved 30 September 2015.

[NASA-20150928a-6] Staff (28 September 2015). "Video Complete (58:18) - NASA News Conference - Water Flowing on Present-Day Mars". NASA. Retrieved 30 September 2015.

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