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Author Steffens, M.; Granskog, M.A.; Kaartokallio, H.; Kuosa, H.; Luodekari, K.; Papadimitriou, S.; Thomas, D.N. openurl 
  Title Spatial variation of biogeochemical properties of landfast sea ice in the Gulf of Bothnia, Baltic Sea Type Conference Article
  Year 2006 Publication Proceedings of the International Symposium on Sea Ice, Dunedin (New Zealand), 5-9 Dec 2005 Abbreviated Journal  
  Volume Issue Pages 80-87  
  Keywords  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher International Glaciological Society Place of Publication Cambridge Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Annals of Glaciology Abbreviated Series Title  
  Series Volume 44 Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes (up) Approved no  
  Call Number refbase @ admin @ Steffens2006 Serial 17385  
Permanent link to this record
 

 
Author Steffens, M.; Granskog, M.A.; Kaartokallio, H.; Kuosa, H.; Luodekari, K.; Papadimitriou, S.; Thomas, D.N. openurl 
  Title Spatial variation of biogeochemical properties of landfast sea ice in the Gulf of Bothnia, Baltic Sea Type Conference Article
  Year 2006 Publication Proceedings of the International Symposium on Sea Ice, Dunedin (New Zealand), 5-9 Dec 2005 Abbreviated Journal  
  Volume Issue Pages 80-87  
  Keywords  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher International Glaciological Society Place of Publication Cambridge Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Annals of Glaciology Abbreviated Series Title  
  Series Volume 44 Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes (up) Approved no  
  Call Number refbase @ admin @ Steffens2006 Serial 17396  
Permanent link to this record
 

 
Author Steffens, M.; Granskog, M.A.; Kaartokallio, H.; Kuosa, H.; Luodekari, K.; Papadimitriou, S.; Thomas, D.N. openurl 
  Title Spatial variation of biogeochemical properties of landfast sea ice in the Gulf of Bothnia, Baltic Sea Type Conference Article
  Year 2006 Publication Proceedings of the International Symposium on Sea Ice, Dunedin (New Zealand), 5-9 Dec 2005 Abbreviated Journal  
  Volume Issue Pages 80-87  
  Keywords  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher International Glaciological Society Place of Publication Cambridge Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Annals of Glaciology Abbreviated Series Title  
  Series Volume 44 Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes (up) Approved no  
  Call Number refbase @ admin @ Steffens2006 Serial 17407  
Permanent link to this record
 

 
Author Granskog, M.A.; Kaartokallio, H.; Kuosa, H.; Thomas, D.N.; Ehn, J.; Sonninen, E. url  doi
openurl 
  Title Scales of horizontal patchiness in chlorophyll a, chemical and physical properties of landfast sea ice in the Gulf of Finland (Baltic Sea) Type Journal Article
  Year 2005 Publication Polar Biology Abbreviated Journal Polar Biol  
  Volume 28 Issue 4 Pages 276-283  
  Keywords  
  Abstract Horizontal variation of first-year landfast sea ice properties was studied in the Gulf of Finland, the Baltic Sea. Several scales of variation were considered; a number of arrays with core spacings of 0.2, 2 and 20 m were sampled at different stages of the ice season for small-scale patchiness. Spacing between these arrays was from hundreds of meters to kilometers to study mesoscale variability, and once an onshore–offshore 40-km transect was sampled to study regional scale variability. Measured variables included salinity, stable oxygen isotopes (δ18O), chlorophyll a (chl-a), nutrients and dissolved organic carbon. On a large scale, a combination of variations in the under-ice water salinity (ice porosity), nutrient supply and the stage of ice development control the build-up of ice algal biomass. At scales of hundreds of meters to kilometers, there was significant variability in several parameters (salinity, chl-a, snow depth and ice thickness). Analyses of the data from the arrays did not show evidence of significant patchiness at scales <20 m for algal biomass. The results imply that the sampling effort in Baltic Sea ice studies should be concentrated on scales of hundreds of meters to kilometers. Using the variations observed in the study area, the estimate for depth-integrated algal biomass in landfast sea ice in the Gulf of Finland (March 2003) is 5.5±4.4 mg chl-a m-2.  
  Address Granskog: Arctic Centre, University of Lapland, P.O. Box 122, 96101 Rovaniemi, Finland  
  Corporate Author Thesis  
  Publisher Springer-Verlag Place of Publication Heidelberg Editor  
  Language English Summary Language English Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0722-4060 ISBN Medium  
  Area Baltic Sea; Gulf of Finland Expedition Conference  
  Notes (up) Approved no  
  Call Number refbase @ admin @ Granskog++2005 Serial 739  
Permanent link to this record
 

 
Author Steffens, M.; Granskog, M.A.; Kaartokallio, H.; Kuosa, H.; Luodekari, K.; Papadimitriou, S.; Thomas, D.N. url  openurl
  Title Spatial variation of biogeochemical properties of landfast sea ice in the Gulf of Bothnia, Baltic Sea Type Conference Article
  Year 2006 Publication Annals of Glaciology Abbreviated Journal Ann Glaciol  
  Volume 44 Issue 1 Pages 80-87  
  Keywords Sea ice; Fast ice; Sea ice properties; Ice algae; Chlorophyll; Biogeochemistry; Nutrients (mineral); Particulate organic matter; Dissolved organic matter; Salinity; Spatial scale; Spatial variability; Horizontal patchiness; Sampling design; Brackish water; Ane; Baltic Sea; Gulf of Bothnia  
  Abstract Horizontal variation of landfast sea-ice properties was studied in the Gulf of Bothnia, Baltic Sea, during March 2004. In order to estimate their variability among and within different spatial levels, 72 ice cores were sampled on five spatial scales (with spacings of 10 cm, 2.5 m, 25 m, 250 m and 2.5 km) using a hierarchical sampling design. Entire cores were melted, and bulk-ice salinity, concentrations of chlorophyll a (Chl a), phaeophytin (Phaeo), dissolved nitrate plus nitrite (DIN) as well as dissolved organic carbon (DOC) and nitrogen (DON) were determined. All sampling sites were covered by a 5.5-23 cm thick layer of snow. Ice thicknesses of cores varied from 26 to 58 cm, with bulk-ice salinities ranging between 0.2 and 0.7 as is typical for Baltic Sea ice. Observed values for Chl a (range: 0.8-6.0 μg Chl a l-1; median: 2.9 μg Chl a l -1) and DOC (range: 37-397 μM; median: 95 μM) were comparable to values reported by previous sea-ice studies from the Baltic Sea. Analysis of variance among different spatial levels revealed significant differences on the 2.5 km scale for ice thickness, DOC and Phaeo (with the latter two being positively correlated with ice thickness). For salinity and Chl a, the 250 m scale was found to be the largest scale where significant differences could be detected, while snow depth only varied significantly on the 25 m scale. Variability on the 2.5 m scale contributed significantly to the total variation for ice thickness, salinity, Chl a and DIN. In the case of DON, none of the investigated levels exhibited variation that was significantly different from the considerable amount of variation found between replicate cores. Results from a principal component analysis suggest that ice thickness is one of the main elements structuring the investigated ice habitat on a large scale, while snow depth, nutrients and salinity seem to be of secondary importance.  
  Address  
  Corporate Author Thesis  
  Publisher International Glaciological Society Place of Publication Cambridge Editor  
  Language English Summary Language English Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0260-3055 ISBN Medium  
  Area Baltic Sea; Gulf of Bothnia Expedition Conference International Symposium on Sea Ice, Dunedin (New Zealand), 5-9 Dec 2005  
  Notes (up) Approved no  
  Call Number refbase @ admin @ Steffens++2006 Serial 754  
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