Sodium profile data

Pacific Ocean 34° N, 165° W

Atlantic Ocean 40° N, 20° W

Depth (m)

Temp °C

Salinity

Na (mmol/kg)

Depth (m)

Temp °C

Salinity

Na (mol/kg)

10

23.497

34.553

478.8

11

20.723

35.941

498.8

50

16.772

34.467

477.6

38

18.264

35.976

499.3

100

13.873

34.443

477.3

68

15.357

35.915

498.4

199

12.045

34.319

475.5

107

14.258

35.910

498.3

298

10.589

34.226

474.1

147

13.750

35.852

497.5

395

8.978

34.105

472.4

206

13.211

35.777

496.4

598

5.612

33.990

470.8

305

12.496

35.680

495.0

792

4.218

34.138

472.9

404

11.803

35.585

493.7

994

3.458

34.279

474.9

600

10.550

35.443

491.6

1233

2.942

34.420

476.9

798

9.720

35.502

492.5

1491

2.544

34.510

478.2

996

8.632

35.538

493.0

1730

2.254

34.567

479.0

1195

7.566

35.488

492.3

1970

2.001

34.600

479.5

1394

6.511

35.381

490.7

2223

1.810

34.625

479.9

1593

5.282

35.198

488.1

2467

1.686

34.641

480.1

1940

4.088

35.038

485.8

2712

1.602

34.653

480.3

2291

3.516

34.989

485.1

2957

1.544

34.663

480.4

2640

3.087

34.960

484.7

3447

1.488

34.674

480.6

2989

2.826

34.945

484.5

3934

1.477

34.681

480.7

3335

2.663

34.929

484.2

4421

1.494

34.685

480.7

3679

2.591

34.917

484.1

4909

1.528

34.688

480.8

4028

2.552

34.909

483.9

5391

1.576

34.690

480.8

4373

2.520

34.902

483.8

5700

1.615

34.690

480.8

4721

2.541

34.901

483.8

4847

2.547

34.902

483.8

Salinity data from eWOCE Atlas

Pacific = Cruise 18DD9403/1, Station W043

Atlantic = Cruise 32OC202/1, Station 50

Sodium was estimated from the formula 24165.5*Salinity/1.80655/(1000-1.81578*Salinity/1.80655)

where 1.80655 is the Salinity/Chlorinity ratio and 241655 is the number of moles of Chlorinity -

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

Wiley, pp. 3-80.