We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.
To save content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about saving content to .
To save content items to your Kindle, first ensure coreplatform@cambridge.org
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Edited by
T. M. L. Wigley, National Center for Atmospheric Research, Boulder, Colorado,D. S. Schimel, National Center for Atmospheric Research, Boulder, Colorado
Carbonate reefs and platforms have accumulated CaCO3 at a rate of 8–9 × 1012 mol/yr over the last few million years. The Holocene rate of shallow water CaCO3 deposition is approximately 17 × 1012 mol/yr. In order for the shallow water CaCO3 flux to maintain its long-term average deposition rate, it must decline to below 8 × 1012 mol/yr during glacial intervals. Shallow water CaCO3 sediments represent a large, dynamic carbon reservoir that rapidly affects the alkalinity of the surface ocean and hence the CO2 content of the atmosphere. Shallow water carbonate deposition, while probably an important constraint on paleoatmospheric CO2 concentrations, can only slightly influence the anthropogenically driven buildup of atmospheric CO2.
Introduction
In order for the record of atmospheric CO2 changes contained in glacial ice (Neftel et al., 1982; Barnola et al., 1987) to reflect changes in the deposition of marine carbonate, shallow water deposition during interglacial intervals must be significantly higher than the long-term average, and the global weathering of near–sea level carbonates must contribute an increased flux of dissolved calcium carbonate (CaCO3) to the oceans during glacial low stands (Milliman, 1974). Review of research on the global Holocene shallow water carbonate flux reveals that the size of the shallow water carbonate reservoir is not well constrained.
Recommend this
Email your librarian or administrator to recommend adding this to your organisation's collection.