|Average concentration in ocean:||2.3 nmol/kg|
|Residence time:||330,000 years|
The cesium residence time is from Tracers in the Sea (Broecker, W. S. and Peng, T.-H., 1982. Eldigo Press, Palisades, NY). It was calculated from the global average river input.
Cesium can be determined by neutron activation analysis, atomic absorption spectrometry or mass spectrometry.