Open AccessGlacial‐age deep sea carbonate ion concentrations
Author(s) -
Broecker W. S.,
Clark Elizabeth
Publication year - 2003
Publication title -
geochemistry, geophysics, geosystems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.928
H-Index - 136
ISSN - 1525-2027
DOI - 10.1029/2003gc000506
Subject(s) - glacial period , geology , carbonate , holocene , carbonate ion , oceanography , shell (structure) , dissolution , deep sea , paleontology , materials science , chemistry , metallurgy , composite material
A second stab is taken at the reconstruction of the distribution of carbonate ion concentration in the deep tropical Pacific and Atlantic Oceans. It takes into account glacial to Holocene changes in size‐normalized initial shell weights; it adopts a more rigorous relationship between measured core‐top shell weights and pressure‐normalized CO 3 = concentrations; and it employs an expanded glacial data set. While the conclusion that the effective glacial CO 3 = ion concentration decreased with water depth, when greater initial shell weights for glacial‐age shells are adopted, the conclusion is that dissolution during glacial time exceeded that during the late Holocene. This conclusion is seemingly at odds with previous studies of deep Pacific sediments, all of which suggest that more extensive dissolution occurred during periods of interglaciation than during periods of glaciation.