Under climate change, the Bering–Chukchi continental shelves have experienced drastic sea ice loss, breaking the minimum sea ice extent record in 2018. In this paper, we report a distinctive spring phytoplankton bloom in the Bering Strait based on year-round mooring observations during 2016–2018. A near-bottom fluorescence sensor mounted on a mooring and satellite observations indicate that, despite the early sea ice retreat in spring of 2018 (mid-April), the spring phytoplankton bloom was not observed for more than 20 days after sea ice retreat. In contrast, in 2017 when sea ice retreat did not occur as early as it did in 2018 (early May), the bloom and sea ice retreat occurred in tighter synchrony. Mooring (2016–2018) and satellite observations (2003–2011, 2013–2018) suggest that an open-water bloom rather than an ice-edge bloom occurred in the Bering Strait in the spring of 2018. Early sea ice retreat apparently provided unfavorable conditions for an ice-edge bloom due to weak sunlight and winter-like weather. Mid-winter sea ice loss was promoted by unusual southerly winds, bringing in warm water from the south. For the Bering Strait, the end of April is a reference date for sea ice retreat that distinguishes between an open-water bloom and an ice-edge bloom, which is approximately one month later than that in the southeastern Bering Sea.

在气候变化的影响下，白令-楚科奇大陆架经历了剧烈的海冰流失，打破了2018年的最低海冰范围记录。在本文中，我们根据白令海峡全年的系泊观测结果报告了白令海峡春季浮游植物的独特开花。 2016–2018。安装在系泊设备和卫星观测仪上的近底部荧光传感器表明，尽管在2018年春季（4月中旬）海冰较早退缩，但海冰退缩后20天内仍未观察到春季浮游植物开花。相比之下，在2017年没有像2018年（5月初）那样发生海冰退缩的情况下，水华和海冰退缩的同步性更高。系泊（2016–2018）和卫星观测（2003–2011，2013-2018年）表明，白令海峡在2018年春季发生了开阔水华而不是冰缘水华。由于日照弱和冬季寒冷，早期的海冰退缩显然为冰缘水华提供了不利条件。喜欢天气。异常冬季的南风加剧了冬季中海冰的流失，从南方引入了温水。对于白令海峡而言，4月底是海冰撤退的参考日期，它区分了开阔水华和冰缘水华，比白令海东南大约晚了一个月。从南部引进温水。对于白令海峡而言，4月底是海冰撤退的参考日期，它区分了开阔水华和冰缘水华，比白令海东南大约晚了一个月。从南部引进温水。对于白令海峡而言，4月底是海冰撤退的参考日期，它区分了开阔水华和冰缘水华，比白令海东南大约晚了一个月。