This paper is focuses on trade between eastern Blekinge and the other side of the Baltic Sea during the Viking Age. There are scarce tracks of trade in the area but one place, Skällenäs, isdifferent. Here a treasure has been found with coins from England and Germany and some of the place names are here probably connected with places on the other side of the Baltic.This discovery can be an indication of trade but the paper should be seen as a first investigation and could be the basis of a more extensive survey..

AbstractThis thesis examines and discusses a sample of the medieval hypocausts (stone-heating ovens) in The Baltic area. The medieval construction is thoroughly explained as well as the antique hypocaust in order to establish a base for the following discussion. The medieval hypocaust has been almost forgotten for a long period of time. The last time someone dealt with this category of finds were in the 1960?s by Swedish archaeologist Iwar Andersson and in the 1970?s by Danish archaeologist Johannes Hertz.

This research aims to investigate the effects that dredging may have on benthic fauna. The dredging took place in the stream Ireån on northern Gotland during the early summer 2010. My area of research was taking place in a scenic area downstream in Ireån close to the Baltic Sea. I chose this area due to the dredging that started just upstream of this area and continued further upstream. Thus it is not the direct impact of the dredging that is the focus for this paper but the side-effect the dredging may have on the area downstream.

Convective snowbands is a weather phenomenon that is associated with heavy snowfall in a limited area. They are formed over ice-free parts of e.g. the Baltic Sea when there is a cold easterly airflow over relatively warm water. These convective snowbands can cause large amounts of snow along the Swedish east coast, often causing traffic hazards. Sometimes they can even paralyze an entire community.  In this study, convective snowbands that have formed over the Baltic Sea during the period 1980-2009 are examined, in order to find out how often they occur, what place they are most common and in what month they usually appear.

The Pitted ware dwelling site Ajvide on the west coast of Gotland in the Baltic Sea is, because of its long continuity from the late Mesolithic to the middle of the Scandinavian Bronze Age, an interesting research object concerning Stone Age in The Baltic area. In this essay, a comparison between two activity areas on Ajvide have been carried out in the purpose of finding out what these areas may have been used for during the middle Neolithic.  It has been showed, through zooarchaeological analyses of animal bones, that the areas most likely are depositing sites for slaughters refuse and food debris. If it is a result of everyday or more ceremonial activities is left undetermined..

The purpose with the essay is to point out how the main differences of the Helsinkicommission, Helcom and Baltic 21 can be explained from a general perspective and with a specific focus on two of their ongoing projects: Baltic 21 Lighthouse projects and The Baltic Sea Joint Comprehensive Environmental Action Plan. And to investigate how the organisations them selves formulates the purpose of the two projects. This will be an indication on why environmental problems are handled with in a traditional matter although the rhetoric of the environmental politics is permeated by the concept of Sustainable Development.This dilemma is being treated from the theoretical approaches of Ecological Modernisation and Sustainable Development and linked to how these organisations actually carried out their work and how the historical heritage have a role to play in this complex of problems. The results of the essay shows that concrete differences exists in the way that the two organisations are constructed and how their ongoing projects are designed and formulated. These differences can be derived to the theoretical platforms Ecological Modernisation and Sustainable Development and be explained by in witch political context the organisations were created.

The study begins with a historical background over the fisheries development in North America and in the Baltic Sea area in Finland and Sweden. As we can see the fisheries development depends on the interaction between ecology, state of production, politic and also social factors. In Sweden the fishery politic has changed over the period of the study. In the 1970: s the main politic focus was on the fisheries progress, expansion and rationalization. The State in Sweden took a vast part in this development and gave economic support.

During the past few years a vast amount of research has been done to increase the understanding of the complex ecosystem of the Baltic Sea. Modelling and simulations are important tools to increase knowledge of the system. A suitable model must be simple to use and the parameters and variables needed in the model must be easy to access.In this paper a dynamical mass-balance model, CoastMab, which is validated for smaller coastal areas, has been used to predict concentrations and transports of phosphorus in three large coastal areas - the Gulf of Finland, the Gulf of Gdansk and the Gulf of Riga. CoastMab uses ordinary differential equations to regulate inflow, outflow and internal flows. To reflect seasonal variations in temperature and different types of flows the model has a temporal resolution of a month.

Eutrophication of the Baltic Sea is a serious problem. A major contributing factor is diffuse losses of phosphorus (P) from agricultural land in surrounding countries. In order to estimate P losses, environmental monitoring of small agriculture-dominated catchments is being carried out in most of these countries. Evaluation of the risk of P leaching to waters is usually based on chemical tests originally developed to quantify the amount of soil P available for plant production. The tests are performed in different ways in the different countries and a number of different extraction agents are in use.

Studiens syfte är att undersöka om, och i så fall hur dagens elever i grundskolan undervisas om hållbar utveckling enligt riktlinjerna i Baltic 21E.Studien är av kvalitativ karaktär och bygger på intervjuer av skolledning samt undervisande lärare i NO- och SO-ämnen vid två högstadieskolor i två kommuner i nordöstra Skåne.Baltic 21E:s övergripande mål gäller alla utbildningsnivåer, men anger speciellt för grundskolan att eleverna skall ha ?kompetens, värderingar och färdigheter för att kunna vara aktiva, demokratiska och ansvarsfulla medborgare och för att kunna fatta egna beslut?, samt kunna delta i beslut inom olika nivåer i samhället för att skapa ett hållbart samhälle. Eleverna ska också ha färdigheter, kompetens och relevant yrkesutbildning för sitt framtida arbetsliv.Resultatet visar att eleverna når likvärdiga kunskapsmål trots att de två skolorna bedriver undervisningen olika. Läromedlen är samma eller i vart fall likartade och innehåller de punkter Baltic 21E pekar på.De använda läromedlen uppfyller de normer Baltic 21E anger, varför alla grundskolor har möjligheten att bereda sina elever en tillfredsställande undervisning om hållbar utveckling, men ämnena bör samordnas bättre. Begreppet hållbar utveckling bör markeras med en ?flagga?, så att den ämnesövergripande kopplingen blir tydligare, och lättare att förstå för eleverna..

Turbot (Psetta maxima) and flounder (Platichthys flesus) are two species of flatfish both having their nursery areas around the shores of Gotland in the Baltic Sea. The common brown shrimp (Crangon crangon) is a known predator on newly settled plaice (Pleuronectes platessa) in the North Sea area and is also found in the Baltic Sea. Experiments were carried out to see if the brown shrimp is predating on juvenile turbot and flounder, and if so on which sizes, and if the brown shrimp prefers any of the flatfish species, and also to see if there is a difference between day and night in density of the shrimp, i.e. when the fish might be subjected to predation. The results showed that predation decreased with size for both turbot and flounder.

In November 2007 the countries around the Baltic Sea signed the Baltic Sea Action Plan (BSAP). The action plan was an initiative from HELCOM due to the environmental status in the Baltic Sea. The action plan implemented a new approach with measures targeting the whole ecosystem. Eutrophication, hazardous substances, biodiversity and maritime activities constituted the main segments. The parties were to establish national implementation plans to fulfil the BSAP goals, which shall lead to good environmental status in the Baltic Sea by 2021.  The aim of this thesis is to investigate the points in common regarding conceptions of eutrophication in the Baltic Sea between the management, the science, the media and the public.

This report is commissioned by the Water and Sewage Agency in The City of Mariehamn, Åland. The basic aim is to investigate positive or negative effects of a relocation of the sewage pipe from a wastewater treatment plant, Lotsbroverket. The environmental licence of Lotsbroverket is to be revised and The Environmental Appeal Board at Åland?s Government and Administrative Board has made demands that several possible locations in an outer water area should be examined. The present location of the sewage pipe is in Svibyviken, which has been classified as an ?inner water area?.The objective of this work is to study to which extent the nutrient loading from Lotsbroverket influence the environmental conditions in Svibyviken, and to investigate the suitability of different locations of the wastewater pipe from Lotsbroverket.The way a coastal area looks, i.e., its morphometry, determines to a large extent its ecological characteristics.

During the 1960´s and 1970´s the number of grey seals in the Baltic Sea was decreasing rapidly, mostly due to hunting and toxic substances like DDT and PCB. When hunting became less intense and toxic substances decreased in the environment the grey seal population started to increase. Today grey seals are found common in the Baltic Sea and have started to become a big treat and a problem to the fishing industry. The grey seal destroys and enters fishing traps and consumes large quantities of the fish that have been caught.The knowledge of the grey seal, like abundance and food preferences, is today limited. It is also important to define the position of the grey seal in the ecosystem in the Baltic Sea and to be able to predict changes that could occur if the population would rapidly decrease or increase.

A well, situated on Listerlandet in the western part of Blekinge in Sweden, has a very high content of nitrate. Water with a too high content of nitrate is hazardous to human health, in particular to small children. The area surrounding the well is mostly drained agricultural land with some larger farms for chicken and mink. The well takes its water from the bedrock and is deeper than most other wells affected by nitrate. The bedrock in the area is dominated by limestone with a relatively high flow of water.This thesis was performed in order to find the source of the nitrate.