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		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:2902:_Ice_Core&amp;diff=336711</id>
		<title>Talk:2902: Ice Core</title>
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				<updated>2024-03-06T21:51:01Z</updated>
		
		<summary type="html">&lt;p&gt;Sapin: explanation should mention the reference to Claude Lorius&lt;/p&gt;
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Akin to [[2729: Planet Killer Comet Margarita]], which perhaps needs mentioning in the upcoming Explanation... [[Special:Contributions/162.158.74.118|162.158.74.118]] 23:04, 4 March 2024 (UTC)&lt;br /&gt;
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Added a short explanation, but it'll definitely need more work. [[Special:Contributions/172.70.210.235|172.70.210.235]] 23:11, 4 March 2024 (UTC)&lt;br /&gt;
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The title text raises a lot of questions.  It's a play on the mixed drink Long Island Iced (or Ice) Tea of course.  But why the underscore?  Why does the T look funny (tau?)?  Why isn't tea spelled out?[[Special:Contributions/172.69.6.189|172.69.6.189]] 23:44, 4 March 2024 (UTC)Pat&lt;br /&gt;
:Yes, Randall did use tau in the title text. I recently made mention of that in my most recent edit. I'm not sure why he used it but maybe instead of a &amp;quot;Gone Island Ice Tea&amp;quot;, it's a &amp;quot;Gone Island Ice Tau&amp;quot;? [[User:OmniDoom|OmniDoom]] ([[User talk:OmniDoom|talk]]) 23:58, 4 March 2024 (UTC)&lt;br /&gt;
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Tau is tortuosity in a lot of equations involving porous material (including ice), and also represents time in some engineering disciplines.  It's written as &amp;quot;Ice_τ&amp;quot;, and I have no idea what the oddly specific underscore is.  Maybe it's &amp;quot;I x c x e&amp;quot; from some equation that involves τ?   And somehow could be relevant to a sunken island? [[Special:Contributions/172.69.58.152|172.69.58.152]] 00:05, 5 March 2024 (UTC)&lt;br /&gt;
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:It could be the case that the underscore before the tau is indicating a subscript and that, as you said, the &amp;quot;Ice&amp;quot; could be &amp;quot;I * c * e_τ&amp;quot; but I have no way of being sure. (Quick aside: I originally read the &amp;quot;I x c x e&amp;quot; expression as though it were &amp;quot;Ixcxe&amp;quot; and took it for a word or an acronym or something. Humanity really needs to agree on a universal form of multiplication sign for typing.)[[User:OmniDoom|OmniDoom]] ([[User talk:OmniDoom|talk]]) 00:28, 5 March 2024 (UTC)&lt;br /&gt;
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::Aside cont.: We already have a character specifically for this: × (U+00D7 MULTIPLICATION SIGN). How to type that is an exercise left to the reader. [[Special:Contributions/172.68.19.94|172.68.19.94]] 01:01, 5 March 2024 (UTC)&lt;br /&gt;
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I've heard recently (possibly reheard, as (amongst other things) I've been relistening to The Infinite Monkey Cage broadcasts/podcasts but can't immediately pin down the remembered context) about ice-core samplings having been used as drink-ice. But this is thousands-of-years-old ice, with thousands-of-years-old atmosphere trapped in it, as bubbles that get released as it melts. It was supposed to be special, given that (with a bit of poetic licence) you could technically breath in the ancient atmosphere with a good sniff at the glass. Though, as might not be surprising, the ''taste'' was described as &amp;quot;like drilling fluid&amp;quot;. [[Special:Contributions/172.69.195.156|172.69.195.156]] 02:24, 5 March 2024 (UTC)&lt;br /&gt;
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Is it really possible to date ice layers to specific years? I assume dating precision is millenia, maybe at best centuries. The explanation should mention how impossible it is to date to a specific birth year, unless there happened to be a specific climatologic event that year (like a big eruption). [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 02:54, 5 March 2024 (UTC)&lt;br /&gt;
:If compressed (centuries or more of snow atop), it might be more difficult, but this is going to be maybe a handful of decades of layers. Depending upon the local buildup method (still snows a bit during the long (ant)arctic night, then (ant)arctic day gentle crisps the surface snow), it might be fairly obvious under visual inspection. Even without key marker deposits from atmospheric dust/soot/etc. But would depend upon both weather and climate patterns. [[Special:Contributions/172.69.194.242|172.69.194.242]] 04:39, 5 March 2024 (UTC)&lt;br /&gt;
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&amp;quot; '''ice (usually sourced locally)'''.[''citation needed'']&amp;quot;&lt;br /&gt;
Up until just about a hundred years ago, most ice in the eastern US came from Maine. In winter the Mainers sawed-up the ponds, stored ice in sawdust-filled ice-houses, then in summer shipped it as far south as Cuba. --[[User:PRR|PRR]] ([[User talk:PRR|talk]]) 05:23, 5 March 2024 (UTC)&lt;br /&gt;
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While the ending pun on the name of actor/rapper &amp;quot;Ice Cube&amp;quot; is funny (as would be a more elaborate pun also involving Ice-T), I think it detracts from the explanation, actually making things more confusing. [[User:Mathmannix|Mathmannix]] ([[User talk:Mathmannix|talk]]) 11:54, 5 March 2024 (UTC)&lt;br /&gt;
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Can anyone identify the specific geological event Randall refers to?  When did a Volcano destroy a tea plant producing island? [[Special:Contributions/172.70.230.169|172.70.230.169]] 11:57, 5 March 2024 (UTC)&lt;br /&gt;
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I think I have answered my own question... This is the google search results:&lt;br /&gt;
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Has a volcano ever destroyed an island?&lt;br /&gt;
The 1883 eruption of Krakatoa (Indonesian: Letusan Krakatau 1883) in the Sunda Strait occurred from 20 May until 21 October 1883, peaking in the late morning hours of 27 August when over 70% of the island of Krakatoa and its surrounding archipelago were destroyed as it collapsed into a caldera. [[Special:Contributions/162.158.155.53|162.158.155.53]] 12:00, 5 March 2024 (UTC)&lt;br /&gt;
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An aside: Though I don't know if it was intentional on Randall's part, there is an additional pun to Ice_τ: In German 'Tau' is not just the Greek letter, but also the word for 'melt' - which does fit the comic's theme. [[Special:Contributions/172.69.150.94|172.69.150.94]] 13:59, 5 March 2024 (UTC)&lt;br /&gt;
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About the _τ, some times programs (like Desmos) use underscores to portray subscripts, which may be the intent here --[[Special:Contributions/172.70.230.155|172.70.230.155]] 19:47, 6 March 2024 (UTC)&lt;br /&gt;
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I think this is a clear reference to the weel known anecdote in the paleoclimatologist community. Claude Lorius was drinking a glass of Whisky on an Antarctic base when he noticed that air bubles trapped in the ice could provide key information on fomer climatic conditions. After a quick search, here is a reference citing this anecdote [https://images.cnrs.fr/en/archives/claude-lorius-memories-ice]. [[User:Sapin|Sapin]] ([[User talk:Sapin|talk]]) 21:51, 6 March 2024 (UTC)&lt;/div&gt;</summary>
		<author><name>Sapin</name></author>	</entry>

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