Persistent high primary production during the growing season in the Chukchi Sea (Arctic Ocean) plays a key role in maintaining an efficient biological carbon pump and diverse Arctic ecosystem. We used a three-dimensional ocean–sea ice–biogeochemical model to simulate monthly averaged net primary production from 1998 to 2015. The results show that the growing season in the Chukchi Sea lasts more than 150 days, with an annual net primary production of 30.85 ± 3.67 Tg C y⁻¹. The mechanisms for maintaining high primary production differ in the southern and northern Chukchi Sea biological hotspots. Nutrient-rich Pacific Winter Water triggers phytoplankton blooms in both hotspots as light intensity increased in spring. After these initial blooms, Bering Summer Water and remnant Pacific Winter Water are the main contributors to nutrient levels and drive primary production during the growing season (May to September) in the southern and northern hotspots, respectively. Nitrate budget estimations in the euphotic zone reveal that after the spring blooms, persistent high primary production in the southern hotspot is mainly fueled by advecting Bering Summer Water through the Bering Strait. In the northern area, vertical mixing plays a critical role in upwelling nutrient-rich Pacific Winter Water from around the Hanna Shoal, where Pacific Winter Water is trapped for a long duration as a result of topography-influenced ocean circulation. Hence, high primary production exists in the northern Chukchi Sea during the summer and early autumn.

楚科奇海（北冰洋）在生长期持续保持较高的初级生产力，对维持有效的生物碳泵和多样化的北极生态系统起着关键作用。我们使用三维海洋-海冰-生物地球化学模型来模拟1998年至2015年的月平均净初级生产量。结果表明，楚科奇海的生长期持续了150天以上，年净初级生产量为30.85 ±3.67 Tg C y ^-1。在楚科奇海南部和北部的生物热点地区，维持高初级生产力的机制各不相同。随着春季光强的增加，富含营养的太平洋冬季水会触发两个热点的浮游植物开花。在这些最初的开花之后，白令夏季水和残留的太平洋冬季水分别是南部和北部热点地区生长季节（5月至9月）养分含量的主要推动力，并推动初级生产。富营养区的硝酸盐预算估计表明，春季开花后，南部热点地区持续的高初级产量主要由通过白令海峡的白令夏季水平流提供。在北部地区，垂直混合对于汉娜浅滩周围营养丰富的太平洋冬季水的上升起着至关重要的作用，由于地形影响的海洋环流，太平洋冬季水被长期滞留。因此，夏季和初秋期间，北部楚科奇海的初级生产力很高。