We are not able to resolve this OAI Identifier to the repository landing page. If you are the repository manager for this record, please head to the Dashboard and adjust the settings.
Ice sheets play a more important role in the global silicon cycle than
previously appreciated. Input of dissolved and amorphous particulate silica
into natural waters stimulates the growth of diatoms. Here we measure
dissolved and amorphous silica in Greenland Ice Sheet meltwaters and icebergs,
demonstrating the potential for high ice sheet export. Our dissolved and
amorphous silica flux is 0.20 (0.06–0.79) Tmol year−1, ∼50% of the input from
Arctic rivers. Amorphous silica comprises >95% of this flux and is highly
soluble in sea water, as indicated by a significant increase in dissolved
silica across a fjord salinity gradient. Retreating palaeo ice sheets were
therefore likely responsible for high dissolved and amorphous silica fluxes
into the ocean during the last deglaciation, reaching values of ∼5.5 Tmol
year−1, similar to the estimated export from palaeo rivers. These elevated
silica fluxes may explain high diatom productivity observed during the last
glacial–interglacial period
Is data on this page outdated, violates copyrights or anything else? Report the problem now and we will take corresponding actions after reviewing your request.