The Nickel NICL Tour

1
The Nickel NICL Tour
2
(No Transcript)
3
(No Transcript)
4
(No Transcript)
5
GISP 2D, 2114 m
6
(No Transcript)
7
(No Transcript)
8
(No Transcript)
9
(No Transcript)
10
(No Transcript)
11
(No Transcript)
12
(No Transcript)
13
(No Transcript)
14
The National Ice Core Laboratory
15
(No Transcript)
16
(No Transcript)
17
(No Transcript)
18
(No Transcript)
19
Holocene
20
115KYBP
21
But ice cores arent ONLY a tool forclimate
change research

• One example
• Ice sheets preserve trace elements deposited from
  the atmosphere
• Gives natural (pre-industrial) abundances, for
  background for modern, disturbed conditions

22
Findings

• In pre-industrial times, quiescent worldwide
  volcano degassing contributed most of the masses
  of trace elements in the ice (much more than can
  be accounted for by the dust and sea salt
  present).

23
Another (related) example

• Do falls of volcanic ash (tephra) bring with them
  large amounts of excess, available trace metals,
  to their localities of deposition?
• Tephra falls are preserved in ice

24
Finding

• Tephra is not a source of extra trace elements,
  to the oceans or land on which it falls
• It has trace element abundance no higher than
  ordinary volcanic rock, of its type
• (volcanic explosion are
  high-energy, high-entropy processes,
• with little
  potential for fractionation)

25
THE END
26
(No Transcript)
27
(No Transcript)
28
(No Transcript)
29
(No Transcript)
30
(No Transcript)
31
(No Transcript)
32
(No Transcript)
33
(No Transcript)
34
(No Transcript)
35
(No Transcript)
36
(No Transcript)
37
(No Transcript)
38
(No Transcript)
39
(No Transcript)
40
Ice Core Lab Floor Plan
41
(No Transcript)
42
(No Transcript)
43
(No Transcript)
44
(No Transcript)
45
(No Transcript)
46
(No Transcript)
47
(No Transcript)
48
(No Transcript)
49
Core processing line in action
50
(No Transcript)
51
(No Transcript)
52
(No Transcript)
53
(No Transcript)
54
(No Transcript)
55
(No Transcript)
56
(No Transcript)
57
(No Transcript)
58
(No Transcript)
59
(No Transcript)
60
(No Transcript)
61
(No Transcript)