Inventory and distribution of tritium in the oceans in 2016: https://www.sciencedirect.com/science/article/abs/pii/S0048969718348034 https://www.sciencedirect.c

Inventory and distribution of tritium in the oceans in 2016: https://www.sciencedirect.com/science/article/abs/pii/S0048969718348034 https://www.sciencedirect.com/science/article/abs/pii/S00489... [The total Tritium in the oceans] is determined equal to 26.8 ± 14 kg including 3.8 kg of cosmogenic tritium. That is in agreement with the total atmospheric input of tritium from nuclear bomb tests and the natural inventory at steady-state estimated from natural production rates in the literature (27.8–29.3 kg in the Earth).