The zinc cycle is a biogeochemical cycle that transports zinc through the lithosphere, hydrosphere, and biosphere. Zinc-containing minerals in the Earth's crust exist primarily as sulfides, such as sphalerite and wurtzite, and carbonates such as smithsonite.

2014年9月23日 · Understanding the biogeochemical cycling of Zn in the modern ocean begins to address the imbalance between the light δ66 Zn signature of marine sources and the globally homogeneous deep oceans (δ66 Zn of +0.5‰) on long timescales, with overall patterns pointing to sediments as an important sink for isotopically light Zn throughout the oceans.

2014年1月15日 · In this paper we present, for the first time, depth profiles of Zn concentrations and isotopic compositions covering the entire water column, specifically from the Atlantic Sector of the Southern Ocean.

2018年7月6日 · The geological record exhibits millennial cycles (26, 27) and billion-year trends in δ 66 Zn, currently attributed to Zn speciation and changes in biological productivity. Our findings suggest that changes in the relative burial of adsorbed and organic Zn are an important mechanism controlling mean-ocean δ 66 Zn on geological time scales.

2018年12月7日 · Our study gives a complete picture of the ocean Zn cycle, demonstrating both similarities and differences between the cycles of Zn and macronutrients. The Zn and Si cycles are mechanistically coupled through the uptake of Zn and Si by diatoms in the Southern Ocean, where biological uptake of Zn is further enhanced by Fe scarcity.

2017年2月6日 · Here we combine observations with simulations using a three-dimensional model of ocean circulation and biogeochemistry to show that the coupled distribution of zinc and silicate, as well as the...

2024年6月13日 · Inputs from the atmosphere, rivers, and hydrothermal vents sustain the cycling of zinc (Zn) between the dissolved (dZn) and particulate (pZn) phases. Reactions drive these phase conversions and the physical transport of Zn.

2024年6月13日 · These findings reveal a new dimension to the ocean Zn cycle, implicating an underappreciated role of inorganic Zn particles and their impact on biological productivity. 锌 (Zn) 对海洋生物至关重要。 它被浮游植物主动吸收，导致溶解锌的大量消耗，而与颗粒有机物结合的锌通过再矿化补充了海洋中溶解的锌。 然而，我们发现颗粒状锌从与细胞中磷酰基结合的锌转变为顽固的无机池，其中包括南大洋水柱中的生物二氧化硅、粘土以及铁、锰和铝的氧化物。 无机 …

2020年1月1日 · Zinc (Zn) is an essential micronutrient, playing an important role in several key processes in marine phytoplankton. Here, we present the first high-resolution depth profiles for dissolved Zn and δ 66 Zn from all major zones of the Southern Ocean, collected during the Antarctic Circumnavigation Expedition in Austral Summer 2016/2017. The ...

斯泰伦博斯大学环境与海洋生物地球化学专家首次解释驱动海洋锌循环的生物地球化学过程，再次证实了南大洋在全球生物过程和碳循环中的重要作用。 该研究首次基于实地证据揭示了无机锌颗粒在这些循环中被低估的作用。 锌是海洋生物生长发育不可或缺的元素。 微小的浮游植物会吸收海水中的锌，将其转化为自身的一部分。 这些浮游植物是海洋食物链的基础，为各种海洋生物提供了食物。 然而，随着浮游植物的死亡，它们携带的锌并不会就此消失。 这些富含锌的有机颗粒 …