of 2
Table 3.
Uranium data generated in this study.
All
U concentration data have 95% CI < 0.01
755
ng/g; however, we note that a larger systematic uncertainty likely exists due uncertainties in
756
the dilution of the CRM
-
112a and IRMM
-
3636 spike solutions.
This uncertainty would not affect
757
the trends observed here, b
ut could slightly offset the absolute U content of the samples in a
758
systematic fashion.
759
North Atlantic
GEOTRACES
cruise
latitude
longitude
depth (m)
d
238
U
95% CI
d
234
U
sec
95% CI
salinity
U (ng/g)
n
GA03
35.4178
293.4735
235.7
-
0.387
0.036
145.73
0.35
36.5947
3.02
8
GA03
39.6859
290.1870
420
-
0.4
00
0.054
145.56
0.33
35.0981
3.04
9
GA03
35.4178
293.4735
422.5
-
0.414
0.036
145.75
0.35
36.511
0
3.04
8
GA03
39.6859
290.1870
475
-
0.358
0.045
146.22
0.43
35.0684
3.05
5
GA03
39.6859
290.1870
526
-
0.38
0
0.044
144.98
0.23
35.0543
2.98
13
GA03
35.4178
293.4735
552.3
-
0.355
0.046
145.27
0.27
36.2067
3.14
13
GA03
39.6859
290.1971
600
-
0.392
0.038
145.65
0.32
35.0227
2.99
8
GA03
39.6859
290.1971
665
-
0.373
0.038
145.63
0.32
34.9936
2.93
8
GA03
35.4178
293.4735
803.6
-
0.358
0.046
145.33
0.27
35.344
0
2.99
13
GA03
39.6859
290.1971
825
-
0.355
0.04
0
146.15
0.28
34.9622
2.89
11
GA02
49.7218
317.5523
1012
-
0.337
0.045
145.71
0.25
34.93468
2.83
7
GA02
51.8203
314.2675
1014
-
0.347
0.046
145.57
0.27
34.89259
2.93
13
GA02
51.8203
314.2675
1258
-
0.405
0.047
145.57
0.28
34.89628
3.05
12
GA02
49.7218
317.5523
1262
-
0.357
0.048
145.65
0.27
34.91355
3.05
6
GA03
39.6859
290.1971
1501
-
0.361
0.048
145.74
0.30
34.9554
2.91
11
GA02
49.7218
317.5523
1517
-
0.407
0.04
0
145.91
0.26
34.91985
2.91
7
GA02
51.8203
314.2675
1521
-
0.431
0.042
145.40
0.21
34.91169
3.04
14
GA02
54.0634
314.1649
1521
-
0.4
00
0.051
145.95
0.31
34.90632
3.04
10
GA03
39.6859
290.1971
1671
-
0.386
0.037
145.58
0.23
34.9531
3.01
7
GA02
54.0634
314.1649
1758
-
0.39
0
0.052
145.76
0.31
34.90853
3.06
10
GA02
49.7218
317.5523
1771
-
0.392
0.04
145.90
0.26
34.9225
3.02
7
GA02
51.8203
314.2675
1773
-
0.407
0.047
145.22
0.17
34.91199
2.91
14
GA03
39.6859
290.1971
1800
-
0.402
0.071
145.74
0.52
34.9551
3.00
8
GA03
39.6859
290.1971
2000
-
0.382
0.067
145.06
0.52
34.9476
3.00
8
GA02
51.8203
314.2675
2003
-
0.413
0.047
145.49
0.17
34.91031
2.89
14
GA02
49.7218
317.5523
2024
-
0.386
0.035
146.12
0.23
34.91909
3.01
9
GA03
39.6859
290.1971
2050
-
0.413
0.083
145.49
0.38
34.9467
2.97
3
D. dianthus
sample
latitude
longitude
depth (m)
d
238
U
95% CI
d
234
U
sec
95% CI
U (ng/g)
n
7923
39.725
290.617
1953
-
2220
-
0.395
0.042
141.33
0.29
3.51
9
78461
38.488
286.973
1990
-
2175
-
0.366
0.04
1
145.19
0.21
3.91
21
62306
39.775
290.262
1675
-
0.386
0.0
64
141.56
0.26
4.22
6
62309
40.379
292.344
430
-
613
-
0.404
0.0
30
145.78
0.31
3.39
15
South Atlantic
GEOTRACES
cruise
latitude
longitude
depth (m)
d
238
U
95% CI
d
234
U
sec
95% CI
salinity
U (ng/g)
n
GA02
-
48.968
311.121
301
-
0.407
0.043
145.37
0.30
34.053
3.03
9
GA02
-
48.968
311.121
404
-
0.374
0.024
145.08
0.37
34.114
2.87
9
GA02
-
48.968
311.121
502
-
0.356
0.044
144.90
0.39
34.207
2.97
9
GA02
-
48.968
311.121
750
-
0.396
0.046
145.66
0.16
34.372
3.64
10
GA02
-
48.968
311.121
1014
-
0.358
0.045
145.52
0.40
34.513
2.99
8
GA03
-
48.968
311.121
1267
-
0.379
0.042
145.54
0.26
34.625
3.00
7
D. dianthus
sample
latitude
longitude
depth (m)
d
238
U
95% CI
d
234
U
sec
95% CI
U (ng/g)
n
47409
-
54.483
320.633
659
-
686
-
0.366
0.034
145.10
0.23
4.71
21
South Pacific
GEOTRACES
cruise
latitude
longitude
depth (m)
d
238
U
95% CI
d
234
U
sec
95% CI
salinity
U (ng/g)
n
GP13
-
29.999
173.000
15
-
0.376
0.036
145.37
0.30
35.641998
2.92
21
GP13
-
29.999
173.000
30
-
0.361
0.038
145.29
0.23
35.640999
3.01
25
GP13
-
29.999
173.000
50
-
0.387
0.029
145.27
0.21
35.639999
3.01
21
GP13
-
29.999
173.000
75
-
0.354
0.027
145.43
0.23
35.640999
3.05
25
GP13
-
29.999
173.000
100
-
0.357
0.03
0
145.48
0.25
35.638000
3.03
21
GP13
-
29.999
173.000
150
-
0.36
0
0.028
145.43
0.35
35.601002
3.07
21
GP13
-
29.999
173.000
200
-
0.369
0.026
145.15
0.40
35.558998
2.99
23
GP13
-
29.999
173.000
300
-
0.338
0.03
0
145.21
0.20
35.433998
3.08
21
GP13
-
29.999
173.000
500
-
0.372
0.027
145.51
0.31
34.995998
2.97
20
GP13
-
29.999
173.000
750
-
0.374
0.033
145.63
0.30
34.644001
2.94
19
GP13
-
29.999
173.000
1000
-
0.375
0.024
145.34
0.31
34.433998
2.90
20
GP13
-
29.999
173.000
1450
-
0.379
0.026
145.76
0.32
34.554001
2.86
19
D. dianthus
sample
latitude
longitude
depth (m)
d
238
U
95% CI
d
234
U
sec
95% CI
U (ng/g)
n
94071
-
30.717
173.28
590
-
640
-
0.370
0.031
145.44
0.34
3.71
9
TN228
-
44.8
150.3
2395
-
0.331
0.044
145.31
0.42
5.75
13
TN228
-
44.8
150.3
2395
-
0.361
0.073
145.21
0.41
5.67
11
TN228
-
44.8
150.3
2395
-
0.385
0.053
145.20
0.28
5.28
12
TN228
-
44.8
150.3
2395
-
0.380
0.074
145.11
0.34
5.34
9
TN228
-
44.8
150.3
2395
-
0.402
0.069
145.06
0.35
5.33
9
TN228
-
44.8
150.3
2395
-
0.324
0.034
145.20
0.40
5.23
8
TN228
-
44.8
150.3
2395
-
0.338
0.067
145.10
0.36
5.34
9
TN228
-
44.8
150.3
2395
-
0.366
0.050
145.34
0.31
5.08
12
TN228
-
44.8
150.3
2395
-
0.425
0.058
144.03
0.34
5.12
9
TN228
-
44.8
150.3
2395
-
0.361
0.061
145.26
0.23
4.92
9
TN228
-
44.8
150.3
2395
-
0.355
0.083
144.70
0.30
4.67
8
TN228
-
44.8
150.3
2395
-
0.373
0.045
145.37
0.35
4.68
8
TN228
-
44.8
150.3
2395
-
0.374
0.051
144.75
0.38
4.66
9
TN228
-
44.8
150.3
2395
-
0.344
0.045
144.89
0.40
4.69
8
TN228
-
44.8
150.3
2395
-
0.377
0.041
144.58
0.40
4.73
9
TN228
-
44.8
150.3
2395
-
0.365
0.051
145.70
0.35
4.47
8
TN228
-
44.8
150.3
2395
-
0.400
0.060
145.41
0.26
4.56
9
TN228
-
44.8
150.3
2395
-
0.371
0.038
145.50
0.20
4.64
8
TN228
-
44.8
150.3
2395
-
0.375
0.075
145.25
0.22
4.58
10
TN228
-
44.8
150.3
2395
-
0.373
0.079
144.94
0.33
4.63
9
BCR
-
2
sample
d
238
U
95% CI
d
234
U
sec
95% CI
U (ng/g)
n
BCR
-
2
-
0.291
0.047
0.41
0.31
1.63
9
BCR
-
2
-
0.226
0.036
0.66
0.55
1.61
4
BCR
-
2
-
0.229
0.032
0.53
0.67
1.71
4
BCR
-
2
-
0.235
0.060
0.84
0.38
1.74
8
BCR
-
2
-
0.277
0.034
0.71
0.15
1.59
19
BCR
-
2
-
0.264
0.025
0.65
0.21
1.59
16
BCR
-
2
-
0.243
0.025
0.52
0.16
1.59
21
BCR
-
2
-
0.299
0.040
0.59
0.20
1.59
14
BCR
-
2
-
0.269
0.022
0.65
0.16
1.59
25
BCR
-
2
-
0.265
0.036
0.75
0.18
1.58
11
BCR
-
2
-
0.263
0.036
0.70
0.29
1.58
1
1
760