Relationship between sinking organic matter and minerals in the shallow zone of the western Subarctic Pacific
Relationship between sinking organic matter and minerals in the shallow zone of the western Subarctic Pacific
复制标题
DOI：
10.1007/s10872-010-0057-1
复制
发表时间：
2010-09
影响因子：
2.3
通讯作者：
M. Shigemitsu;Y. Watanabe;Y. Yamanaka;H. Kawakami;M. Honda
中科院分区：
文献类型：
--
作者：
M. Shigemitsu;Y. Watanabe;Y. Yamanaka;H. Kawakami;M. Honda
我们使用时间序列沉积物捕集器数据的四个主要组成部分，有机物和压载矿物（碳酸钙，蛋白石，和成岩物质）从150，540，和1000米在西亚北极太平洋（WSAP），蛋白石是主要的矿物沉降颗粒，开发四个简单的模型沉降颗粒，包括“压载模型”。压载模型的基础是深海中的大部分有机物“雨”是由矿物携带的。这四个模型的目的是同时再现在540和1000米的沉降颗粒的每个主要组成部分的通量，通过使用每个组件在150米的数据作为初始值。在四个模型中，压载模型，它认为下沉速度随深度增加，被确定为最好的使用赤池信息标准作为模型拟合数据的措施。该模型成功地再现了有机物在540和1000米的通量，表明压载模型的概念，以及在浅水区的WSAP的季节性时间尺度上。这也表明，压载矿物不仅在物理上保护有机物在沉降过程中不被降解，而且还提高了下沉速度并降低了分解程度。
We used time-series sediment trap data for four major components, organic matter and ballast minerals (CaCO3, opal, and lithogenic matter) from 150, 540, and 1000 m in the western subarctic Pacific (WSAP), where opal is the predominant mineral in sinking particles, to develop four simple models for settling particles, including the “ballast model”. The ballast model is based on the concept that most of the organic matter “rain” in the deep sea is carried by the minerals. These four models are designed to simultaneously reproduce the flux of each major component of settling particles at 540 and 1000 m by using the data for each component at 150 m as initial values. Among the four models, the ballast model, which considers the sinking velocity increase with depth, was identified as the best using the Akaike information criterion as a measure of the model fit to data. This model successfully reproduced the flux of organic matter at 540 and 1000 m, indicating that the ballast model concept works well in the shallow zone of the WSAP on a seasonal timescale. This also suggests that ballast minerals not only physically protect the organic matter from degradation during the settling process but also enhance the sinking velocity and reduce the degree of decomposition.