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Aeolian dust is a critical part of the iron cycle by transporting iron particulates from the Earth's land via the atmosphere to the ocean. [23] Volcanic eruptions are also a key contributor to the terrestrial iron cycle, releasing iron-rich dust into the atmosphere in either a large burst or in smaller spurts over time. [24]
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 ...
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Chinua Achebe was born on 16 November 1930 and baptised Albert Chinụalụmọgụ Achebe. [ 1 ] [ a ] His father, Isaiah Okafo Achebe, was a teacher and evangelist, and his mother, Janet Anaenechi Iloegbunam, was the daughter of a blacksmith from Awka , [ 3 ] a leader among church women, and a vegetable farmer.
Full article: Iron Fertilization. Iron fertilization is a facet of geoengineering, which purposefully manipulates the Earth's climate system, typically in aspects of the carbon cycle or radiative forcing. Of current geoengineering interest is the possibility of accelerating the biological pump to increase export of carbon from the surface ocean.
Marine chemistry, also known as ocean chemistry or chemical oceanography, is the study of the chemical composition and processes of the world’s oceans, including the interactions between seawater, the atmosphere, the seafloor, and marine organisms. [2]
Another cause of concern is the sheer amount of urea needed to capture the same amount of carbon as eq. iron fertilization. The nitrogen to iron ratio in a typical algae cell is 16:0.0001, meaning that for every iron atom added to the ocean a substantial larger amount of carbon is captured compared to adding one atom of nitrogen. [35]
The isotopically heavy iron in the deep ocean suggests that the iron cycle is dominated by the abiotic, non-reductive release of iron, via desorption or dissolution, from particles. [38] Isotopic analyses similar to the one above are utilized throughout all of the world's oceans to better understand regional variability in the processes which ...