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Search: WFRF:(Hjalmarsson Sofia 1980) > (2008)

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1.
  • Björk, Göran, 1956, et al. (author)
  • The Passage of Canadian Basin Deep Water Over the Lomonosov Ridge and Through the Eurasian Basin of the Arctic Ocean: Results From the LOMROG-2007 Icebreaker Expedition
  • 2008
  • In: American Geophysical Union. ; 88(52)
  • Conference paper (peer-reviewed)abstract
    • During the LOMROG-2007 icebreaker expedition to the area where the Lomonosov Ridge attaches to the Greenland shelf, we observed a well defined signal in water mass properties of clear CBDW origin. The major part of CBDW passes the Lomonosov Ridge at the 1870 m deep channel near the North Pole (88 25' N, 150 E) as was discovered during the Beringia/Hotrax 2005 exploration of the sill area. During the LOMROG expedition we observed the signal of CBDW along the Amundsen Basin side of the Lomonosov Ridge slope north of Greenland and further along the Greenland shelf towards east and south. The signal with Canadian Basin properties is clearly seen in the TS structure as well as in the oxygen, silicate and CFC signals around 2000 m depth. No indication of a deep overflow across the Lomonosov Ridge at the channel just north of Greenland was seen.
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2.
  • Hjalmarsson, Sofia, 1980, et al. (author)
  • Distribution, long-term development and mass balance calculation of total alkalinity in the Baltic Sea
  • 2008
  • In: Continental Shelf Research. - : Elsevier BV. - 0278-4343. ; 28:4-5, s. 593-601
  • Journal article (peer-reviewed)abstract
    • During the 20th century, extensively hydrographic investigations had been performed in the Baltic Sea. One of the parameters that have been determined during these historic investigations of the Baltic Sea is the total alkalinity (AT). In this study, this large data set is used together with a specifically developed box model to estimate the in- and outflows of salinity and AT within the different sub-basins. The Baltic Sea receives large amounts of freshwater through river runoff, and AT can be used as a chemical signature of the runoff as its concentration depends on the mineralogy of the drainage basin. Rivers entering the southern part of the Baltic Sea are draining areas rich in limestone, therefore having higher AT than rivers entering the northern part of the Baltic Sea where granite dominates the bedrock. The mean AT in rivers entering a specific region of the Baltic Sea is achieved by the intercept of the regression line when salinity is plotted versus AT for the corresponding data. In this study, the focus is on the Gulf of Finland and the Gulf of Bothnia where the longest time series data are available. There is a common trend with an increase in AT in rivers entering the Gulf of Finland and a decrease in AT in rivers entering the Gulf of Bothnia.
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