CONCENTRATIONS AND PARTITIONING OF POLYCHLORINATED BIPHENYLS IN THE SURFACE WATERS OF THE SOUTHERN BALTIC SEA—SEASONAL EFFECTS

2006 ◽  
Vol 25 (10) ◽  
pp. 2569 ◽  
Author(s):  
Kilian E.C. Smith ◽  
Michael S. McLachlan
Keyword(s):  
Polychlorinated Biphenyls ◽  
Baltic Sea ◽  
Surface Waters ◽  
Seasonal Effects ◽  
Southern Baltic Sea ◽  
Southern Baltic

Dissolved oxygen supersaturation and its impact on bubble formation in the southern Baltic Sea coastal waters

2008 ◽  
Vol 39 (3) ◽  
pp. 229-236 ◽  
Author(s):  
R. Marks
Keyword(s):  
Dissolved Oxygen ◽  
Baltic Sea ◽  
Surface Waters ◽  
Coastal Waters ◽  
Bubble Formation ◽  
Breaking Waves ◽  
Southern Baltic Sea ◽  
Sea Bed ◽  
Southern Baltic ◽  
Summer Time

The dissolved oxygen supersaturation in the surface waters was investigated as a factor influencing bubble formation in the southern Baltic Sea coastal waters in Warszów, Lubiatowo and Hel from 1995 to 2007. To quantify the changes of oxygen supersaturation, data were collected along transects using integrated dissolved oxygen and water temperature sensors, either mounted on a remotely operated platform or deployed manually. Data revealed that an excess of solar energy in the nutrient-rich Baltic Sea coastal waters caused an immediate warming of sea bed and bottom water, which induced gaseous supersaturation and enhanced biological production of oxygen by phytoplankton. Both processes increased the degree of dissolved oxygen saturation, which became highly supersaturated, especially during the spring and summer time. Such conditions are favourable for enhanced formation of bubbles in the water, which enhanced the release of gases (mostly oxygen) into the air. Gaseous evasion is, in particular, enhanced in the presence of breaking waves and whitecaps that are typically formed over coastal ridges and at the shore line. Laboratory experiments indicated that, with the increasing degree of dissolved oxygen supersaturation, both the number of bubbles produced in the water and their sizes increase.

A multi-tracer study of submarine groundwater discharge into Wismar Bay, southern Baltic Sea

2020 ◽  
Author(s):  
Catia Milene Ehlert von Ahn ◽  
Jan Scholten ◽  
Iris Schmiedinger ◽  
Bo Liu ◽  
Michael Böttcher
Keyword(s):  
Baltic Sea ◽  
Pore Water ◽  
Surface Waters ◽  
Submarine Groundwater Discharge ◽  
Isotope Composition ◽  
Groundwater Discharge ◽  
Pore Waters ◽  
Southern Baltic Sea ◽  
Submarine Groundwater ◽  
Southern Baltic

<p>Submarine groundwater discharge (SGD) is considered as an important route for water and dissolved material exchange between land and coastal seas. Both freshwater and (recirculated) seawater are referred to as SGD and may impact the composition and biogeochemical processes in coastal waters. The present study focuses on the identification and the spatial variability of SGD into the Wismar Bay, in the southern Baltic Sea. On across-shore transects covering Wismar Bay waters were sampled for analysis of Radium (Ra) isotopes, stable isotopes (H, O, C, S), dissolved inorganic carbon (DIC), nutrients and major cations. In addition, sediment cores were retrieved from several stations. The detection of short-living radium isotopes (<sup>223</sup>Ra and<sup>224</sup>Ra) in surface waters of the bay indicate benthic-pelagic coupling via pore water exchange with the water column that may be an indication for SGD. Moreover, enhanced concentration of dissolved manganese and barium, resulted from anoxic pore waters, were found in areas with higher Ra activity. Pore water profiles of salinity and major ions highlight the presence of freshwater about 50 cmbsf in sediments in the central part of the bay, probably related to the presence of a coastal aquifer. In contrast, other sediments demonstrate relatively constant pore water salinity distribution with increasing depth. Slight salinity maxima in almost all core at around 6 to 12 cmbsf seems to be relict from changing bottom water salinity in the past. The water isotope composition (δ<sup>18</sup>O, δ<sup>2</sup>H) of the low saline pore water is plot close to the local meteoric water line established for Warnemünde. Saline pore waters, in contrast, have water isotope composition aligned with southern Baltic Sea surface waters. The DIC concentrations increased with depths suggesting the mineralization of organic matter within the 50 cm sediments depth at all sides. Moreover, the values of DIC even exceeding the concentration found on the percolating fresh ground water. Thus, the overall contribution of elements to the coastal ecosystem is a function of the transport processes regulating element flux across the sediment-water interface.</p><p>The investigation is supported by the DFG research training school Baltic TRANSCOAST, DAAD, and Leibniz IOW.</p>

After the flood: Impact of salt water intrusions on the isotope biogeochemistry of a rewetted coastal peatland

2021 ◽  
Author(s):  
Lucas Winski ◽  
Benjamin Rach ◽  
Anna-K. Jenner ◽  
Julia Westphal ◽  
Iris Schmiedinger ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Surface Waters ◽  
Salt Water ◽  
Research Front ◽  
Element Cycling ◽  
Southern Baltic Sea ◽  
Southern Baltic ◽  
Flooding Events ◽  
The Impact ◽  
J 64

<p><span>Land-ocean interactions in the coastal zone (LOICZ) are of particular interest regarding the exchange of water and elements, like nutrients, carbon, sulfur, and metals. </span><span>Processes impacting </span><span>groundwater</span><span> fluxes at these boundaries belong to the still unsolved problems in hydrology (Blöschl et al., 2019). </span><span>Stable isotope signatures (H, C, O, S), major and trace element contents in surface waters of a rewetted coastal peatland were investigated to understand the impact of storm-induced flooding by brackish seawater on hydrology and biogeochemical element cycling.</span></p><p><span>The study area is the Hütelmoor, a wetland located at the coastline of the southern Baltic Sea. The area is characterized by a continuous release of fresh water to the Baltic Sea via submarine groundwater discharge (Jurasinski et al., 2018). Surface water is partly drained to a nearby river, but the introduction of brackish waters into the peatland is typically precluded by a small dune and limited to storm-induced flooding events. In the present study, the spatially distributed composition of surface waters was investigated briefly after a flooding event. The results are compared with previous campaigns without actual salt water impact. </span></p><p><span>Conservative elements and water isotopes demonstrate the importance of seasonal variations due to varying evapotranspiration during pre-flood times and allow for a quantification of mixing processes in the post-flood waters. The impact of soil respired CO</span><sub><span>2</span></sub><span>, and/or the mineralization of organic matter or methane on the surface waters is indicated by a shift of the C isotope composition of DIC towards lighter data. The S and O isotopic composition of dissolved sulfate indicates an impact by solutions modified by net microbial sulfate reduction on pre-flood surface waters and a potential oxidation of reduced sulfur species in post-flooding solutions. </span></p><p><span>Previous flooding events already impacted element cycling in the peatland’s past and are also reflected by a sulfidization of peat layers (Fernández-Fernández et al., 2017) and the observation of local areas with enhanced dissolved concentrations in the central part of the peatland.</span></p><p><span>The study is supported by DFG during GK Baltic TRANSCOAST, DAAD, and Leibniz IOW.</span></p><p align="justify"> </p><p><span>References:</span></p><ul><li><span>Blöschl G. et al. (2019) Twenty-three unsolved problems in hydrology (UPH) – a community perspective. Hydrol. Sci. J. 64, 1141-1158.</span></li> <li><span>Jurasinski G. et al. (2018) Understanding the coastal ecocline: Assessing sea-land-interactions at non-tidal, low-lying coasts through interdisciplinary research. Front. Mar. Sci. 5, 1-22</span><span>.</span></li> <li>Fernández-Fernández L.E. et al. <span>(2017) Sulfur isotope biogeochemistry of soils from an episodically flooded coastal wetland, southern Baltic Sea. Geophys. Res. Abs. 19, EGU2017-14335</span><span>.</span></li> </ul>

Holocene diatom biostratigraphy of the SW Gulf of Gdańsk, Southern Baltic Sea (part III)

2008 ◽  
Vol 37 (4) ◽  
Author(s):  
Małgorzata Leśniewska ◽  
Małgorzata Witak
Keyword(s):  
Baltic Sea ◽  
The South ◽  
Gulf Of Gdańsk ◽  
The Baltic Sea ◽  
Southern Baltic Sea ◽  
Gulf Of Gdansk ◽  
Southern Baltic ◽  
The Baltic ◽  
Palaeoenvironmental Changes

Holocene diatom biostratigraphy of the SW Gulf of Gdańsk, Southern Baltic Sea (part III)The palaeoenvironmental changes of the south-western part of the Gulf of Gdańsk during the last 8,000 years, with reference to the stages of the Baltic Sea, were reconstructed. Diatom analyses of two cores taken from the shallower and deeper parts of the basin enabled the conclusion to be drawn that the microflora studied developed in the three Baltic phases: Mastogloia, Littorina and Post-Littorina. Moreover, the so-called anthropogenic assemblage was observed in subbottom sediments of the study area.

Integrated Research of the Southern Baltic Sea during Cruise 42 of the R/V AkademikNikolaj Strakhov

Oceanology ◽  
2020 ◽  
Vol 60 (4) ◽  
pp. 565-566
Author(s):  
D. V. Dorokhov ◽  
V. T. Paka ◽  
A. A. Kondrashov ◽  
I. Yu. Dudkov ◽  
M. F. Markiyanova
Keyword(s):  
Baltic Sea ◽  
Southern Baltic Sea ◽  
Integrated Research ◽  
Southern Baltic

scholarly journals Argo floats in the southern Baltic Sea

Oceanologia ◽  
2020 ◽  
Vol 62 (4) ◽  
pp. 478-488
Author(s):  
Waldemar Walczowski ◽  
Małgorzata Merchel ◽  
Daniel Rak ◽  
Piotr Wieczorek ◽  
Ilona Goszczko
Keyword(s):  
Baltic Sea ◽  
Southern Baltic Sea ◽  
Argo Floats ◽  
Southern Baltic
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