Talk:Heinrich event
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I've made some changes, some of which undo some of Wetmans changes (sorry). As far as I can tell, HE's are very specific things as far as the glacios are concerned, and there are 6 of them. They aren't the same as D-O events and they aren't the same thing as the more recent shorter cycles. Also I'm a bit unclear in which way H3 and H6 are different but I think its not just in terms of their sources. William M. Connolley 21:06, 23 September 2005 (UTC).
I've added some external links, so that a reader who finds the present article insufficient and inconclusive may read some recent science on the subject. --Wetman 00:01, 24 September 2005 (UTC)
Hemming (2004) reports that there is little published evidence for Heinrich events in previous glacial periods, though Stokes may beg to differ in the 2005 edition of Global and Planetary Change. Moved the italicized addition here. Anyone want to render this obscure hint relevant? --Wetman 17:12, 7 November 2005 (UTC)
- No idea. Was intending to try to find out... might be [1] William M. Connolley 17:54, 7 November 2005 (UTC). Oh, and if it *is* that then we should leave it out: its still in press. Unless we're into really topical science, we shouldn't be including stuff within a year of publication really. William M. Connolley 17:56, 7 November 2005 (UTC).
- BTW, Heinrich events are related to, but not the same as, Dansgaard-Oeschger events is, I agree, unsatisfactory. I shall try to improve that. William M. Connolley 17:50, 7 November 2005 (UTC).
Contents |
[edit] Popularized explanation
It would be nice to add popular-science-like explanation into introduction part of the article, here and for Dansgaard-Oeschger event as well. Readers would appreciate it. 02:21, 17 November 2005 (UTC)
[edit] Hemming 2004
Where have the ages for the Heinrich events been taken from? They don't appear in the article.
- The dates are sourced in the table. I can't remember if Hemming states them explicitly or if I had to read them off a graph. William M. Connolley 15:46, 21 December 2005 (UTC).
[edit] August 2006
There is an easy answer to Conolley's question. The mineral assemblage of H1,2,4,5 ist different from H3 and H6. The latters are characterized by higher amounts of the clay mineral smectite (weathering product of volcanic rock) and volcanic glass shards. All this points to a stronger supply of ice from the Norwegian-Greenland Sea area. Whereas H1,2,4, and 5 have mineral assemblages of the Laurentian region.[User: Hartmut Heinrich, 10 Aug 2006]
Richard Alley's estimate on the volume of ice discharged during a H event (370 km3) seems by far too small. New investigations (satellite gravimetry) report an annual loss from Greenland of about 230 km3 due to the present climate warming. Are we "enjoying" a H event? :-)[User: H Heinrich, 11 Aug 2006]
[edit] Coiuld use some clarification
This phrase is confusing. Perhaps it makes sense if you already know something about Heinrich events, but why wouldn't H3 and H6 be "different"? If they were the same, wouldn't they have the same name?
Six such events, labelled H1-H6, have been identified. There is some evidence that H3 and H6 are different.
Some context would help readers understand just how much the volume of water below is; is there something to which we can compare it?
the volume of freshwater discharged by a typical Heinrich event as 370 km3
Also, what's a "glacial"? An ice age? Clarifying that, and linking to an appropriate Wikipedia article, would help.
Most importantly, what characterizes a Heinrich events? Anything beyond lots of icebergs and fresh water? —The preceding unsigned comment was added by 66.92.53.49 (talk • contribs) .
- I added a link to the "last glacial" which is hard to name as it has different names in different part of the world - see the link in this very sentence. I also added a sentence on the possible sources of the water discharge. I believe that otherwise the definition in the article is well done. Friendly Neighbour 10:51, 19 September 2006 (UTC)
