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Cobalt depth profiles

Pacific Ocean 50.0° N, 145.0° W

Atlantic Ocean 47° N, 20° W

Depth (m)

Co (pmol/kg)

Depth (m)

Co (pmol/kg)

20

28.4

20

21.6

50

49.2

40

26.4

100

53.8

75

43.6

150

43.6

100

200

50.6

150

40.6

250

45.3

200

43.6

290

49.6

300

390

44.2

400

50.4

485

36.3

500

55.5

580

31.4

600

42.2

685

32.2

800

42.3

780

22

900

52.2

875

24.9

950

41.6

975

22.6

1100

51.5

1230

22.2

1500

52.8

1480

16

2000

49.9

1720

16.6

2500

43.2

2180

11.3

2900

29.6

2960

11.6

3470

17.6

3910

13

Martin, J. H., Gordon, R. M., Fitzwater, S. and Broenkow, W. W. 1989. VERTEX:

phytoplankton/iron studies in the Gulf of Alaska. Deep-Sea Res., 36: 649-680.

Martin, J.H., Fitzwater, S. E., Gordon, R. M., Hunter, C. N. and Tanner, S. J., 1993.

Iron, primary production, and carbon-nitrogen flux studies during the JGOFS North Atlantic

bloom experiment. Deep-Sea Res., 40:115-134.