Enhanced East Pacific Rise hydrothermal activity during the last two glacial terminations

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Science  29 Jan 2016:
Vol. 351, Issue 6272, pp. 478-482
DOI: 10.1126/science.aad4296

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Searching sediment for climate signals

Sediments on the ocean floor may provide clues about the interplay between ice ages and mid-ocean ridge magma production. Lund et al. present well-dated and detailed sediment records from hydrothermal activity along the East Pacific Rise. The sediments show changes in metal fluxes that are tied to the past two glaciations. Ice age changes in sea level alter magma production, which is manifested by changes in hydrothermal systems. The apparent increase in hydrothermal activity at the East Pacific Rise around the past two glacial terminations suggests some role in moderating the size of ice sheets.

Science, this issue p. 478

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