Abstract
The Much Overrated Microbial Carbon Pump in the Oceans
Highlights
The basic idea of the heralded microbial carbon pump (MCP) was that any recalcitrant dissolved organic matter (RDOM) that is not microbially degraded for extended periods effectively stores carbon in the oceans
It has been known for decades that microbes play an important role in converting particulate organic matter (POM) to DOM [2]
The basic idea was that any DOM molecules that are not degraded for extended periods effectively store carbon
Summary
The basic idea of the heralded microbial carbon pump (MCP) was that any recalcitrant dissolved organic matter (RDOM) that is not microbially degraded for extended periods effectively stores carbon in the oceans. Once CO2 enters the surface ocean, it is traditionally considered to be transported downward by two major pathways, or the so-called “pumps.” The physical or solubility pump works mainly by sinking the cold, CO2-rich seawater in the polar and subpolar regions, storing CO2 in the deep oceans for hundreds of years. The biological pump transports products of photosynthesis to the deep oceans.
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