1. Deep-sea mixing along 40oS as seen in radium isotopes and actinium
Walter Geibert, Alan Hsieh, Raja Ganeshram, Gideon M Henderson

2. Vertical mixing constrained with actinium: Example from D357 (St.11)

3. Actinium Profiles from 40 S

4. Actinium and mixing in the South AtlanticW

5. A new method to determine 226Ra in water

6. Comparison of new method with traditional ϒ-spectrometry
Valenti Rodellas- UA Barcelona (on Thursday)
signal on RadeCC
226Ra [dpm]
Very cheap and simple method to determine 226Ra in water

7. Summary
Final measurement still stands out (planned for October-November)
Preliminary data show vertical mixing in the lower 1000m between ~0.5 and 10 cm2/s
Data point to an additional source and lateral mixing in ~ m- Other data?
Evaluation has resulted a very promising method to measure 226Ra with a simple counting system.