Invasion of the abyssal North Atlantic by modern anthropogenic lead

Details Invasion of the abyssal North Atlantic by modern anthropogenic lead Invasion of the abyssal North Atlantic by modern anthropogenic lead

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.1477a&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 10, p. 1477-1480

Physics

10

Global Change: Remote Sensing, Oceanography: Physical: Air/Sea Interactions, Oceanography: General: Diurnal, Seasonal, And Annual Cycles

Scientific paper

While anthropogenic emissions have dramatically elevated lead concentrations in the North Atlantic troposphere and surface waters by orders of magnitude above natural levels [Murozumi et al., 1969; Schaule and Patterson, 1983; Boyle et al., 1986], it has been assumed that the relatively low lead levels in North Atlantic abyssal waters are not yet contaminated [Schaule and Patterson, 1981; Flegal and Patterson, 1983]. That misperception is redressed by the following stable lead isotopic composition data which reveal the advective transport of industrial lead into those deep basin waters through the formation of North Atlantic Deep Water (NADW). Additionally, spatial gradients in the isotopic signatures of anthropogenic lead within the North Atlantic abyss appear to serve as transient tracers of contaminant penetration rates.

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