Regardless of Oxygen Levels, Fjords Are Good Carbon Traps

Regardless of  Whether or not the bottom water is oxygen-rich, the fjords on Sweden’s west coast function as efficient carbon traps. This is the end result of a recent study conducted by Gothenburg University academics.

On the west coast of Sweden, large amounts of plant fragments settle to the bottom of fjords and generate sediment. As a result, organic carbon is buried, preventing it from contributing to greenhouse gas emissions and ocean acidification. The organic carbon in the plant components starts to break down into inorganic carbon when they are exposed to oxygen and other chemicals. This inorganic carbon can then dissolve into carbonic acid in water.

Regardless of Oxygen Levels, Fjords Are Good Carbon Traps

Regardless of Previous studies have assumed that the bottom environment’s oxygen content controls how well carbon can be collected; however, measurements taken in three Swedish fjords indicate that oxygen content is not as important as previously thought.

Three fjords with the same design
The study’s co-author, Per Hall, an emeritus professor of marine biogeochemistry at the University of Gothenburg, says, “We chose three fjords with different oxygen levels in the bottom water, and for these fjords it seems that the amount of particles that settle is so high that the impact of oxygen on decomposition is low.”

The sediments of the three fjords—Byfjorden, Hakefjorden, and Gullmarsfjorden—show the same pattern. Whether plant pieces fall onto the bottom from the land or the sea, a large amount of organic carbon is deposited and breakdown happens at the same rate.

Regardless of  This is fresh information as well. The percentage of terrestrial plant components in the sediments is higher in the fjords farther in than in the area nearest to the sill. However, the fjord functions as a carbon sink globally, independent of the source of the organic matter, according to Per Hall.

Particles of minerals add to the carbon trap.
Water courses carry mineral particles into the fjord, where the organic material mixes with them, as another observation from the data may be made. Because bacteria and other creatures cannot break down this material as well, this relationship causes the organic matter to sink more quickly and slows down the process of decomposition. It adds to the carbon sink as well.

Regardless of Oxygen Levels, Fjords Are Good Carbon Traps

Regardless of  The marine ecosystems that store the greatest amounts of organic carbon in relation to their size are fjords. Even though fjords make up only a tenth of one percent of the ocean surface area, each year, some 18 megatons (million tones) of organic carbon are buried in fjord sediments worldwide. This amounts to 11 percent of all carbon trapped in the world’s seas.

Regardless of  Consequently, we draw the conclusion that fjords, particularly those found in moderate climates with surrounding terrestrial flora that might aid in fjord sedimentation, are crucial for the regulation of climate over longer timescales. This highlights how crucial it is to investigate these ecosystems in light of global change, according to Per Hall.

Article Source Eurasia review

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