Hydrographic data are analyzed for the broad continental shelf of the Bellingshausen Sea, which is host to a number of rapidly thinning ice shelves. The flow of warm Circumpolar Deep Water (CDW) onto the continental shelf is observed in the two major glacially carved troughs, the Belgica and Latady troughs. Using ship‐based measurements of potential temperature, salinity, and dissolved oxygen, collected across several coast‐to‐coast transects over the Bellingshausen shelf in 2007, the velocity and circulation patterns are inferred based on geostrophic balance and further constrained by the tracer and mass budgets. Meltwater was observed at the surface and at intermediate depth toward the western side of the continental shelf, collocated with inferred outflows. The maximum conversion rate from the dense CDW to lighter water masses by mixing with glacial meltwater is estimated to be 0.37 ± 0.1 Sv in both depth and potential density spaces. This diapycnal overturning is comparable to previous estimates made in the neighboring Amundsen Sea, highlighting the overlooked importance of water mass modification and meltwater production associated with glacial melting in the Bellingshausen Sea.

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贝灵斯豪森海冰架融化水倾覆

分析了贝灵斯豪森海的广阔大陆架的水文数据，该大陆架有许多迅速变薄的冰架。在两个主要的冰雕槽Belgica和Latady槽中观察到温暖的圆极深水（CDW）流入大陆架。利用2007年在贝灵斯豪森陆架上几个沿海到沿海断面收集的潜在温度，盐度和溶解氧的舰船测量结果，可以根据地转平衡推断出速度和环流模式，并进一步受示踪剂和质量限制预算。在表层和向大陆架西侧的中间深度处观察到融水，并与推测的流出量并置。通过与冰川融水混合，从密集的CDW到较轻的水团的最大转化率在深度和潜在密度空间中估计为0.37±0.1 Sv。径向倾覆可与先前在邻近的阿蒙森海进行的估算相媲美，突显了贝灵斯豪森海与冰川融化有关的水质改良和融水生产的重要性。