Does a ballast effect occur in the surface ocean?
Does a ballast effect occur in the surface ocean?
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DOI：
10.1029/2010gl042574
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发表时间：
2010-04
影响因子：
5.2
通讯作者：
R. Sanders;P. Morris;A. Poulton;M. Stinchcombe;A. Charalampopoulou;M. Lucas;S. Thomalla
中科院分区：
文献类型：
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作者：
R. Sanders;P. Morris;A. Poulton;M. Stinchcombe;A. Charalampopoulou;M. Lucas;S. Thomalla
海洋生物碳泵（BCP）是全球碳循环的一个重要组成部分（10 GT C yr−1），主要由地表水中颗粒有机碳（POC）的沉降（输出）决定。在深海中，生物矿物的向下通量与 POC（所谓的“压载效应”）之间的强相关性表明存在潜在的因果关系，但其性质仍不确定。我们表明，类似的相关性发生在上层海洋，只有当生物矿物也出口时才会出现高出口率。相对于上层海洋常备存量，输出颗粒通常富含生物矿物质，原因如下：（1）输出物质是由上层海洋颗粒富含生物矿物质的子集聚集形成的； (2) 上层海洋颗粒池通过呼吸作用进行不分级聚集，然后选择性地去除相对于生物矿物质的 POC，直到颗粒密度足以下沉。
The oceanic biological carbon pump (BCP), a large (10 GT C yr−1) component of the global carbon cycle, is dominated by the sinking (export) of particulate organic carbon (POC) from surface waters. In the deep ocean, strong correlations between downward fluxes of biominerals and POC (the so‐called ‘ballast effect’) suggest a potential causal relationship, the nature of which remains uncertain. We show that similar correlations occur in the upper ocean with high rates of export only occurring when biominerals are also exported. Exported particles are generally biomineral rich relative to the upper ocean standing stock, due either to: (1) exported material being formed from the aggregation of a biomineral rich subset of upper ocean particles; or (2) the unfractionated aggregation of the upper ocean particulate pool with respiration then selectively removing POC relative to biominerals until particles are dense enough to sink.