Magnesium profile data

Pacific Ocean 34° N, 165° W

Atlantic Ocean 40° N, 20° W

Depth (m)

Temp °C

Salinity

Mg (mmol/kg)

Depth (m)

Temp °C

Salinity

Mg (mmol/kg)

10

23.497

34.553

54.46

11

20.723

35.941

56.73

50

16.772

34.467

54.32

38

18.264

35.976

56.79

100

13.873

34.443

54.28

68

15.357

35.915

56.69

199

12.045

34.319

54.08

107

14.258

35.910

56.68

298

10.589

34.226

53.92

147

13.750

35.852

56.58

395

8.978

34.105

53.73

206

13.211

35.777

56.46

598

5.612

33.990

53.54

305

12.496

35.680

56.30

792

4.218

34.138

53.78

404

11.803

35.585

56.15

994

3.458

34.279

54.01

600

10.550

35.443

55.91

1233

2.942

34.420

54.24

798

9.720

35.502

56.01

1491

2.544

34.510

54.39

996

8.632

35.538

56.07

1730

2.254

34.567

54.48

1195

7.566

35.488

55.99

1970

2.001

34.600

54.54

1394

6.511

35.381

55.81

2223

1.810

34.625

54.58

1593

5.282

35.198

55.51

2467

1.686

34.641

54.60

1940

4.088

35.038

55.25

2712

1.602

34.653

54.62

2291

3.516

34.989

55.17

2957

1.544

34.663

54.64

2640

3.087

34.960

55.12

3447

1.488

34.674

54.66

2989

2.826

34.945

55.10

3934

1.477

34.681

54.67

3335

2.663

34.929

55.07

4421

1.494

34.685

54.67

3679

2.591

34.917

55.05

4909

1.528

34.688

54.68

4028

2.552

34.909

55.04

5391

1.576

34.690

54.68

4373

2.520

34.902

55.03

5700

1.615

34.690

54.68

4721

2.541

34.901

55.03

4847

2.547

34.902

55.03

Salinity data from eWOCE Atlas

Pacific = Cruise 18DD9403/1, Station W043

Atlantic = Cruise 32OC202/1, Station 50

Magnesium was estimated from the formula 2748.4*Salinity/1.80655/(1000-1.81578*Salinity/1.80655)

where 1.80655 is the Salinity/Chlorinity ratio and 2748.4 is the number of mmoles of Chlorinity -

Millero, F., 1974. Seawater as a multicomponent electrolyte solution, in The Sea, Vol. 5, E. Goldberg, ed.,

Wiley, pp. 3-80.