Empirical relationships for use in global diagenetic models
Empirical relationships for use in global diagenetic models
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DOI：
10.1016/s0967-0637(96)00101-x
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发表时间：
1997-02-01
影响因子：
2.4
通讯作者：
Herman, PMJ
中科院分区：
文献类型：
--
作者：
Middelburg, JJ;Soetaert, K;Herman, PMJ
已建立了一个数据库，其中包含已公布的沉积物和孔隙水输运率和地球化学转化率，以推导经验预测方程，校准和参数化全球成岩模型。利用以水深为自变量的指数关系，可以很好地预测沉积物积累率、有机碳埋藏率、有机物通过好氧和厌氧途径的分解率和生物扰动率（以生物扰动系数计）。对这些关系进行了偏斜校正，以减少从对数正态到算术估计的反向转换中固有的偏差。生物扰动被证明是海洋沉积物上层厘米中沉积物输运的主要模式。所得出的经验关系与测深图相结合，以估计全球海底过程的综合速率。海洋边缘沉积物约占海洋物质积累的85%，约占海洋沉积物矿化的80-90%。(C)1997 Elsevier Science Ltd.
A database containing published rates of sediment and pore-water transport and biogeochemical transformations has been established to derive empirical predictive equations to calibrate and parameterize global diagenetic models. Rates of sediment accumulation, organic carbon burial, organic matter decomposition via aerobic and anaerobic pathways and bioturbation (in terms of bioturbation coefficients) can be predicted quite well using exponential relationships with water depth as an independent variable. The relationships are corrected for skewness to reduce the bias inherent in the back transformation from a lognormal to an arithmetic estimate.Bioturbation is shown to be the dominant mode of sediment transport in the upper centimeters of oceanic sediments. The derived empirical relationships are combined with bathymetric maps to estimate globally integrated rates of benthic processes. Ocean margin sediments account for about 85% of the materials accumulating in the ocean and about 80-90% of the mineralization in marine sediments. (C) 1997 Elsevier Science Ltd.