An updated silica budget for the Eastern Mediterranean Sea (EMS) including both silicate and particulate biogenic silica (BSi) showed a net outflow of 27 x 10 molesSi/yr. This deficit suggests that the terms in the budget are still as not well defined. The major term in the budget is the exchange at the Straits of Sicily with 137 x 10 molesSi/yr flowing into the EMS and 258 x 10 molesSi/yr flowing out. Other important terms are the riverine input (34 x 10 molesSi/yr) and diagenetic supply of silicate from underlying sediment (54 x 10 molesSi/yr). Dust is a minor input (5 x 10 molesSi/yr). New focused measurements needed to close the budget should include improved riverine flux, better measurements of diagenetic weathering of clays in the wa...