NDLI: Interannual variability in hydrography and water mass distribution in Hornsund, an Arctic fjord in Svalbard

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Volume 37, 2018

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Interannual variability in hydrography and water mass distribution in Hornsund, an Arctic fjord in Svalbard

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Interannual variability in hydrography and water mass distribution in Hornsund, an Arctic fjord in Svalbard

Content Provider	Taylor & Francis Online
Author	Falck, Eva Walczowski, Waldemar Promińska, Agnieszka
Abstract	Progressing warming in the Arctic and increased extreme weather events can significantly influence the hydrography of Svalbard fjords, leading to changes towards more Atlantic-type waters in the fjords. In this paper, we look into the hydrographic conditions in Hornsund, the southernmost fjord on the west coast of Svalbard, by analysing high-resolution CTD measurements collected in July during cruises with the RV Oceania between 2001 and 2015. These observations revealed high interannual variability in temperature, salinity and distribution of water masses, mainly due to differences in timing of the transition between winter and summer conditions but also as a result of changing environmental factors such as air temperature and sea-ice cover. Hornsund shows weak Atlantic Water occupation, probably due to strong influence of the Sørkapp Current along the southern coast of Spitsbergen. The main basin of the fjord was much more influenced by waters entering the fjord from outside than the inner basin, Brepollen, which was mainly characterized by the presence of locally formed Winter Cooled Water (WCW). The amount and properties of WCW in Brepollen revealed high variability after 2006, and no WCW in July 2012. The results of our study show that Hornsund is highly variable and susceptible to recently observed atmospheric and oceanic extreme events in the Svalbard region.
File Format	PDF HTM / HTML
ISSN	17518369
DOI	10.1080/17518369.2018.1495546
Journal	Polar Research
Volume Number	37
Issue Number	1
Language	English
Publisher	Routledge
Publisher Date	2018-09-06
Access Restriction	Open
Subject Keyword	Temperature Salinity Atlantic Water Sørkapp Current Spitsbergen Environmental factors ArW: Arctic Water AW: Atlantic Water CTD: conductivity, temperature and depth sensor DFI: days of fast ice IW: Intermediate Water LW: Local Water SC: Sørkapp Current SW: Surface Water TAW: Transformed Atlantic Water WCW: Winter Cooled Water WSC: West Spitsbergen Current
Content Type	Text
Resource Type	Article
Subject	1900/1901 Environmental Chemistry Environmental Science Oceanography

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