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

Science Highlights

26 November 2015

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.

Reference:

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

Assessment of the Solomon Sea’s dissolved iron contribution to the Equatorial Under Current

Sarthou and co-workers analysed 11 vertical profiles of dissolved iron at the entrance, within, and at the exit of the Solomon Sea…

To Ba or not to Ba: Evaluating water column excess particulate barium as a proxy for water column respiration

Rahman and co-workers examine the relationship between excess particulate barium and organic matter respiration in the water column…

Major controls on the fate of dissolved manganese in the northeastern Indian Ocean

Malla and Singh investigated the key factors controlling dissolved manganese in the northeastern Indian Ocean.

An original approach to assess the particulate trace metal concentrations in seawater

Sohrin and co-workers propose defining particulate trace metal as the difference between total dissolvable and dissolved metals after a long storage of filtered and unfiltered acidified seawater.

Rechercher