Ocean iron fertilization is proposed as a geoengineering strategy to stimulate phytoplankton (especially diatom) growth in iron-limited high-nutrient-low-chlorophyll regions, thereby drawing down atmospheric CO2, but comes with side effects including intensified oxygen minimum zones and N2O production.
Statements A, B, and D are accurate: large Fe-depleted (HNLC) surface ocean regions do exist (A), added iron does promote export production of organic carbon...
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