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Lisa A. LEVIN and Andrew J. GOODAY
Table 5.5
Estimates of bioturbation rates and mixed layer depth in deep Atlantic sediments
Region
Latitude
D b (cm 2 y −1 ) (mixed
layer) 1
Water depth
(m)
Tracer
Reference
CONTINENTAL SLOPE
Northwest Atlantic
North Carolina (off Cape
Hatteras)
35ºN
19±11.0 (x±1 SD)
850
Th-234
DeMaster et al. (1994)
7.4±4.7 (x±1 SD)
850
glass beads
DeMaster et al. (1994)
North Carolina (off Cape
Lookout)
34ºN
4.6±5.2 (x±1 SD)
850
Th-234
DeMaster et al. (1994)
0.84±0.65 (x±1 SD)
850
glass beads
DeMaster et al. (1994)
North Carolina (off Cape
Fear)
32ºN
6.0±6.2 (x±1 SD)
850
Th-234
DeMaster et al. (1994)
0.29
glass beads
DeMaster et al. (1994)
Nova Scotian Rise
40ºN
1–33
4800
Th-234
DeMaster et al. (1991)
Newfoundland slope
50ºN
0.1–1.0
1500
Pb-210
Smith and Schafer (1984)
North Atlantic
21ºN
0.25
1410
Pu-230
Guinasso and Schink (1975)
Northwest Atlantic
0.19
2705
Pb-210
Turekian et al. (1975)
37ºN
0.7–1.2 (8)
1170
Pb-210
Tanaka et al. (1991)
38ºN
30
2800
Th-234
Aller and DeMaster (1984)
39ºN
0.42
501
Pb-210
Anderson et al. (1988)
1.03
553
Pb-210
Anderson et al. (1988)
0.77
869
Pb-210
Anderson et al. (1988)
0.45
1126
Pb-210
Anderson et al. (1988)
0.14, 0.49
1170
Pb-210
Anderson et al. (1988)
0.92
1275
Pb-210
Anderson et al. (1988)
0.75
1359
Pb-210
Anderson et al. (1988)
0.20
1643
Pb-210
Anderson et al. (1988)
0.71
2362
Pb-210
Anderson et al. (1988)
0.60, 0.73
2700
Pb-210
Anderson et al. (1988)
Northeast Atlantic
Northeast Atlantic
51ºN
0.046
2365
Pb-210
Thomson et al. (1993)
BOFS
0.042
4150
Pb-210
Conte et al. (1994)
EUMELI
21ºN
0.142
2050
Pb-210
Reyss et al. (1993)
BIOGAS
47ºN
0.183 (7)
2100
Pb-210
Mauviel and Sibuet (1985)
47ºN
0.189, 0.167 (6,10)
2800
Pb-210
Mauviel and Sibuet (1985)
Southwest Atlantic
9ºS
0.10
1345
Pu-239
Guinasso and Schink (1975)
Mediterannean
0.8–1.6
1200
Cs-137,
luminophores
Gerino et al. (1993)
MID ATLANTIC RIDGE
Mid Atlantic Ridge
0.19 (8)
2500
Pb-210
Nozaki et al. (1977)
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