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The ocean is a critical component of the Earth's climate system, and the iron cycle plays a key role in ocean primary productivity and marine ecosystem function. Iron limitation has been known to limit the efficiency of the biological carbon pump.
Iron is a key micronutrient in primary productivity, [49] and a limiting nutrient in the Southern ocean, eastern equatorial Pacific, and the subarctic Pacific referred to as High-Nutrient, Low-Chlorophyll (HNLC) regions of the ocean. [50] Iron in the ocean cycles between plankton, aggregated particulates (non-bioavailable iron), and dissolved ...
Ocean iron fertilization is an example of a geoengineering technique that involves intentional introduction of iron-rich deposits into oceans, and is aimed to enhance biological productivity of organisms in ocean waters in order to increase carbon dioxide (CO 2) uptake from the atmosphere, possibly resulting in mitigating its global warming effects.
Iron is a critical phytoplankton micronutrient necessary for enzyme catalysis and electron transport. [3] [4] Between the 1930s and '80s, it was hypothesized that iron is a limiting ocean micronutrient, but there were not sufficient methods reliably to detect iron in seawater to confirm this hypothesis. [5]
A biogeochemical cycle, or more generally a cycle of matter, [1] is the movement and transformation of chemical elements and compounds between living organisms, the atmosphere, and the Earth's crust. Major biogeochemical cycles include the carbon cycle , the nitrogen cycle and the water cycle .
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Large algal blooms can be created by supplying iron to iron-deficient ocean waters. These blooms can nourish other organisms. Ocean iron fertilization is an example of a geoengineering technique. [12] Iron fertilization [13] attempts to encourage phytoplankton growth, which removes carbon from the atmosphere for at least a period of time.
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