Pelagic transfer of iron and nutrients in the Peruvian oxygen minimum zone (B10)

铁、磷和氮是海洋生产力和固氮的关键。在氧最低带（OMZs），铁和磷从沉积物源向地表水和近海的供应增加，而氮的供应减少。铁在omz中的稳定机制和去除通量尚不清楚和量化。总溶解N和P通量很难量化，因为有机N和P组分的大小尚不清楚，而有机N和P组分是近海微生物群落的重要营养物质。该项目将提供秘鲁地区氮、磷和铁转移的定量和机制评估，促进模型参数化，以便在未来气候条件下进行预测和反馈研究。

Fe, P and N are key for ocean productivity and N2 fixation. The supply of Fe and P to surface waters and off shore from sediment sources is enhanced in oxygen minimum zones (OMZs), while N supply is reduced. Fe stabilisation mechanisms and removal fluxes in OMZs are not well known and quantified. Total dissolved N and P fluxes are poorly quantified, because the magnitude of the organic N and P fractions, which form important nutrients to offshore microbial communities, are not well known. This project will provide a quantitative and mechanistic assessment of N, P and Fe transfer in the Peru region, facilitating model parameterisation for projections and feedback studies under future climate conditions.