Environmental Engineering Reference
In-Depth Information
13
CH
4
(per mil)
Oxygen [
µ
M]
CH
4
[nM]
Archaeol ng/l
0
5000
10000
15000
0
0.5
1
1.5
0
50
100
150
200
250
-55 -50 -45 -40 -35 -30 -25 -20 -15
0
0
0
0
100
100
100
100
200
200
200
200
300
300
300
300
400
400
400
400
500
500
500
500
600
600
600
600
700
700
700
700
7605
7605
7605
7605
800
800
800
800
Oxygen [
µ
M]
CH
4
[nM]
13
CH
4
(per mil)
0
50
100
150
200
250
0
1000
2000
3000
-57
-56
-55
-54
-53
-52
-51
0
0
0
50
50
50
100
100
100
150
150
150
200
200
200
250
250
250
7617
7617
7617
300
300
300
Oxygen [
µ
M]
CH
4
[nM]
0
20
40
60
80
0
1000
2000
3000
4000
5000
0
0
50
50
100
100
150
150
200
200
250
250
300
300
7623
7623
350
350
Figure 4.
Oxygen (µM) and methane concentrations (nM) of stations 7605, 7617, and 7623,
the carbon isotopic composition of methane (δ
13
C
CH
4
vs. VPDB) of stations 7605, 7617 and the
depth distribution of Archaeol (ng/l) extracted from particulate material collected from the water
column at station 7605. Note the difference in the depth of the chemocline between stations and
the change in isotopic composition of the methane due to oxidation.
