Abstract. Several climate-driven processes take place in the Arctic fjords. These include ice-ocean interactions, changes in biodiversity and ocean circulation patterns, as well as coastal erosion phenomena. Conducting long-term oceanographic monitoring in the Arctic fjords is, therefore, essential for better understanding and predicting global environmental shifts. Here we address this issue by introducing a new hydrographic dataset from Hornsund, a fjord located in south-western part of Svalbard archipelago. Hydrographic properties have been monitored with vertical temperature, salinity and depth profiles in several lo- cations across the Hornsund fjord from 2015 to 2023. From 2016 onward dissolved oxygen and turbidity data are available for the majority of casts. The dataset contributes to the so far infrequent observations especially in spring and autumn and extends the observations typically concentrated in the central fjord to the areas adjacent to the tidewater glaciers. Because sediment discharge from glaciers and land is an inseparable part of the glacier-ocean interactions, the suspended sediment concentration in the water column as well as the daily sedimentation rate adjacent to the tidewater glaciers are monitored with regular water sampling and bottom-moored sediment traps. Here we present the planning and execution of the monitoring campaign from the collection of the data to the post-processing methods. All datasets are publicly available at the repositories referred to in the Data availability section of this manuscript.

中文翻译：

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斯瓦尔巴特群岛 Hornsund 峡湾的海洋学监测

摘要。北极峡湾发生了一些气候驱动的过程。其中包括冰海相互作用、生物多样性和海洋环流模式的变化以及海岸侵蚀现象。因此，在北极峡湾进行长期海洋学监测对于更好地了解和预测全球环境变化至关重要。在这里，我们通过引入来自霍恩松德（位于斯瓦尔巴群岛西南部的峡湾）的新水文数据集来解决这个问题。 2015 年至 2023 年，通过垂直温度、盐度和深度剖面对 Hornsund 峡湾多个地点的水文特性进行了监测。从 2016 年起，大多数铸件都可以获得溶解氧和浊度数据。该数据集有助于迄今为止罕见的观测，特别是在春季和秋季，并将通常集中在中央峡湾的观测扩展到邻近潮水冰川的区域。由于冰川和陆地的沉积物排放是冰川与海洋相互作用不可分割的一部分，因此通过定期水采样和底部系留沉积物收集器来监测水柱中的悬浮沉积物浓度以及潮水冰川附近的每日沉积率。在这里，我们介绍从数据收集到后处理方法的监测活动的规划和执行。所有数据集均可在本手稿的数据可用性部分提到的存储库中公开获取。