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  • Monitoring cruise in the frame of the COMBINE programme of HELCOM

  • Study of spatial and temporal variations of hydrographic, hydrochemical and biological parameters in the frame of the COMBINE Programme of HELCOM , combined with long term observations of IOW

  • The sixth HD/marine Biology cruise was scheduled in the period 24 August to 31 August 2009. The cruise was planned to be done in maximum 7 days. Due to bad weather conditions, the cruise ended 29 August. ADCP measurements were done in the cruise line. Biological measurements were done on eight positions and CTD on 69 positions. The whole work is listed in a cruise log (appendix to this report) and in the cruise overview map. The working day on the cruise was 24 hours. Hydrographical measurements were running day and night and biological measurements only in daytime. Resume The weather conditions in the beginning of this WQ cruise was good, from Friday evening 28 August the wind speed increased to gale 18 m/sec, with a forecast on harsh wind conditions during the week-end. The rest of the cruise was cancelled Saturday 29 August due to heavy wind conditions and need for repair of a leaking oil pipe. During the cruise the biological stations were sampled in the morning and afternoon. All biological stations were sampled later than 8 o'clock in the morning and not later than 6 o'clock in the afternoon (local time). Monday 31 August, after the official closing of the cruise, CTD stations in the alignment transect was made. ADCP measurements were done on a part of the cruise line, and 3 times in the alignment.

  • A.\tMonitoring cruise in the frame of the COMBINE programme of HELCOM \nB.\tIOW¿s long term data series in the central Baltic Sea

  • Meteorological, hydrographic, marine chemical and biological investigations according to the Baltic Monitoring Programme of HELCOM

  • Monitoring cruise in the frame of the COMBINE programme of HELCOM

  • Studies of the spatial and temporal variations of hydrographic, hydrochemical and hydrobiological parameters in the frame of the COMBINE Programme of HELCOM as well as measurements for the IOW's long term data set

  • The main aim of the cruise was to study whether the bloom of cyanobacteria in the Baltic Proper is triggered and maintained by coastal upwelling of phosphate containing water from the layer of intermediate winter water. This water is located in the summer season in the depth range from about 30 m to 60 m depth and enters the surface layer in a narrow coastal belt of a few kilometer width when the wind is blowing along the coast with the coast to the right. \nA multi-disciplinary approach was used to study the cyanobacteria bloom. The ship was positioned in the coastal upwelling zone east of Gotland and in the water body of intensive cyanobacteria concentrations according to satellite pictures in the Gotland Basin. Physical, chemical, and biological measurements were performed along tracks from the coastal area where the actual upwelling took place to the downweling area at Latvian coast. Continuous measurements of stratification, currents, and chlorophyll-a were performed by a Scanfish along the track. At selected positions along the track water samples were taken in the surface and intermediate layers for the analysis of nitrate, phosphate and abundances of different species of cyanobacteria.

  • The purpose of this cruise was to collect data for the IOW projects ShIC and ILWAO, in which boundary mixing processes and mixing due to internal waves are studied. Focal areas were the Bornholm Basin and the Stolpe Channel of the Baltic Sea. We investigated different transects and stations in this area that were all operated in a similar manner: one or two moored CTD chains with current profilers (ADCP) were deployed near the planned transects for a period of several days. During this period shear microstructure profiling and/or CTD profiling was performed, either at a permanent station near the moorings or along a cross-slope transect in the vicinity of the moorings. This approach, providing measurements that combine high temporal resolution (from the moorings) and high spatial resolution (from ship-based profiling), was repeated at several stations in the study area.

  • The 7.th HD/marine Biology cruise was scheduled in the period 28. September to 5.October 2009. The cruise was planned to be done in maximum 8 days. Due to bad weather conditions, the cruise ended5.October. ADCP measurements were done in the cruise line. Biological measurements were done on nine positions and CTD on 65 positions. The whole work is listed in a cruise log (appendix to this report) and in the cruise overview map. The working day on the cruise was 24 hours. Hydrographical measurements were running day and night and biological measurements only in daytime. Resume The weather conditions in the beginning of this WQ cruise was fairly good, but some with some windy days, from Friday evening 2.oct. the wind speed increased to gale 15-18 m/sec, with a forecast on harsh wind conditions during the week-end. The rest of the cruise was cancelled Saturday 3 October Some wp2 and multinet samples was cancelled due to hard weather conditions and lack of time During the cruise the biological stations were sampled during the day. All biological stations were sampled later than 8 clock in the morning and not later than 6 clock in the afternoon (local time). CTD profiles vas carried out night and day ADCP measurements were done on a part of the cruise line, and 2 times in the alignment. In Langeland belt it was observed that the water column was mixed into very homogene levels on salinity, oxygen and temperature from surface to bottom. In Fehmarn belt, some sign of a very high influx of water with high salinity was observed from a halocline in 8 meters dept and to the bottom, salinity up to 20 ml/litre.