Preprints
https://doi.org/10.5194/essd-2024-153
https://doi.org/10.5194/essd-2024-153
08 May 2024
 | 08 May 2024
Status: this preprint is currently under review for the journal ESSD.

Oceanographic monitoring in Hornsund fjord, Svalbard

Meri Korhonen, Mateusz Moskalik, Oskar Głowacki, and Vineet Jain

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.

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Meri Korhonen, Mateusz Moskalik, Oskar Głowacki, and Vineet Jain

Status: open (until 23 Jun 2024)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
Meri Korhonen, Mateusz Moskalik, Oskar Głowacki, and Vineet Jain

Data sets

Hydrographic observations from Hornsund fjord, Svalbard, 2015-2023 M. Moskalik et al. https://www.pangaea.de/tok/ff2d7cae4caf74f1d0ced10abdb74b86ea553883

Hydrographic observations from Hornsund fjord, Svalbard, 2015-2023 from supplementary stations M. Moskalik et al. https://www.pangaea.de/tok/d435cda9d594c9650df01f222977125a500b352f

Sedimentation rate from Hornsund fjord, Svalbard, 2015-2023 M. Moskalik et al. https://www.pangaea.de/tok/1c4eb8cbfa59320a1db28df347e25c49bd94a649

Suspended sediment concentration from Hornsund fjord, Svalbard, 2015-2023 M. Moskalik et al. https://www.pangaea.de/tok/418c50529e1283e442bdf142db901a92cc865eb3

Meri Korhonen, Mateusz Moskalik, Oskar Głowacki, and Vineet Jain

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Short summary
Since 2015 temperature and salinity have been monitored in Hornsund fjord in southern Svalbard, where retreating glaciers add meltwater and terrestrial matter into coastal waters. Therefore turbidity and water sampling for suspended sediment concentration and sediment deposition are also included. The monitoring spans from May to October, enabling studies on seasonality and its variability over the years, and it covers the whole fjord including the inner basins in close proximity of glaciers.
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