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Global deep-sea burial rate of calcium carbonate during the last glacial maximum
Citation
Catubig, NR and Archer, DE and Francois, R and deMenocal, P and Howard, W and Yu, EF, Global deep-sea burial rate of calcium carbonate during the last glacial maximum, Paleoceanography, 13, (3) pp. 298-310. ISSN 0883-8305 (1998) [Refereed Article]
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Copyright Statement
Copyright © 1998 American Geophysical Union
Official URL: http://www.agu.org/
Abstract
Global databases concentrations rates in Holocene and last glacial of calcium carbonate and mass accumulation maximum sediments were used to estimate the deep-sea sedimentary calcium carbonate burial rate during these two time intervals. Sparse calcite mass accumulation rate data were extrapolated across regions of varying calcium carbonate concentration using a gridded map of calcium carbonate concentrations and the assumption that accumulation of noncarbonate material is uncorrelated with calcite concentration within some geographical region. Mean noncarbonate accumulation rates were estimated within each of nine regions, determined by the distribution and nature of the accumulation rate data. For core-top sediments data coverage 67% of the high-calcite the regions of reasonable encompass (>75%) sediments globally,and within these regions we estimate an accumulation rate of 55.9 +- 3.6x1011 mol yr-1. The same regions cover 48% of glacial high-CaCO3 sediments (the smaller fraction is due to a shift of calcite deposition to the poorly sampled South Pacific) and total 44.1 +- 6.0x1011 mol yr-1. Projecting to 100% coverage South and total 44.1 +- 6.0x1011 both estimates yields accumulation estimates of 8.3x1012 mol yr-1 today and 9.2x1012 mol yr-1 during glacial time. This is little better than a guess given the incomplete data coverage, but it suggests that glacial deep sea calcite burial rate was probably not considerably faster than today in spite of a presumed decreasein shallow water burial during glacial time.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Research Division: | Earth Sciences |
| Research Group: | Climate change science |
| Research Field: | Climate change processes |
| Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
| Objective Group: | Understanding climate change |
| Objective Field: | Understanding climate change not elsewhere classified |
| UTAS Author: | Howard, W (Associate Professor William Howard) |
| ID Code: | 56321 |
| Year Published: | 1998 |
| Web of Science® Times Cited: | 75 |
| Deposited By: | CRC-Antarctic Climate & Ecosystems |
| Deposited On: | 2009-04-22 |
| Last Modified: | 2013-08-29 |
| Downloads: | 2 View Download Statistics |
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