Tracking the sea ice exported from the Siberian Shelf to the Arctic Ocean

An original method based on the use of the couple salinity – δ18O allows determining the fractions of water that had been removed as ice across the shelf and the consequent net export of sea ice from Laptev and East Siberian Sea towards the remaining Arctic Ocean (860 km3/yr).

An important point is that this method does not assume an ice end-member of fixed composition, very powerful when applied on samples with large differences in salinity….

15 Rosen l

Figure: The map shows three geographical lines, sections, in the Laptev and East Siberian Sea. The sections stretch from the mouth of the Lena-, Indigirka- and Kolyma rivers and northward onto the shallow shelf. Based on the δ18O in the water, the vertical profiles indicate the amount of river water on the shelf (b, d and f) and also the fraction of water exported from the shelf as ice (a, c and e). Click here to view the figure larger.


Rosén, P.-O., Andersson, P. S., Alling, V., Mörth, C.-M., Björk, G., Semiletov, I., & Porcelli, D. (2015). Ice export from the Laptev and East Siberian Sea derived from δ18O values. Journal of Geophysical Research: Oceans, 120. doi:10.1002/2015JC010866

Latest highlights

Science Highlights

Extremely high radioactive levels in the manganese nodules

Volz and co-authors demonstrate that radioisotopes in the manganese nodules mostly exceed exempt activity levels…


Science Highlights

The North Pacific Ocean, a key actor for the zinc oceanic cycle

Sieber and his colleagues lift the veil on some of the mechanisms that control the behavior of zinc in the Pacific Ocean, and more globally.


Science Highlights

Disentangling what controls the cadmium distribution in the Pacific Ocean

Sieber and his colleagues established the distribution of dissolved cadmium concentrations and isotopes a section from Alaska to Tahiti.


Science Highlights

Solid-solution distribution of the cosmogenic beryllium-7 in the water column

This work questions the validity and limits of the hypothesis that particulate beryllium-7 can be neglected in the oceanographic applications of this tracer.