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Th profile data

Pacific Ocean 22° 45' N, 158° W

Atlantic Ocean 51° 01'N, 43° 01'W

Dissolved

Dissolved + Particulate

Dissolved + Particulate

Depth (m)

232Th (fmol/L)

232Th (fmol/L)

Depth (m)

232Th (fmol/kg)

25

51.6

63.1

10

509

25

48.6

48.8

690

625

25

64.8

83.8

1640

397

1000

57.1

74.0

2910

491

1000

54.5

75.2

2910

612

2000

55.0

79.5

2910

534

3000

78.5

101.4

4280

474

4000

145.9

197.1

4280

483

4000

608.2

Roy-Barman, M., Chen, J. H., and Wasserburg, G. J., 1996. 230Th-232Th systematics

in the central Pacific Ocean: the sources and the fates of thorium. Earth Planet. Sci. Lett.

139: 351-363.

Chen, J. H., Edwards, R. L., and Wasserburg, G. J., 1986. 238-U, 234-U and 232-Th

in seawater. Earth Planet. Sci. Lett. 80: 241-251.