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The Development of Climate Science of the Baltic Sea Region

Bidrag till encyklopedi
Författare Anders Omstedt
Publicerad i Oxford Research Encyclopedia of Climate Science
Förlag Oxford University Press
Publiceringsår 2017
Publicerad vid Institutionen för marina vetenskaper
Språk en
Länkar doi.org/10.1093/acrefore/9780190228...
Ämnesord climate variability, climate change, multiple anthropogenic forcing, detection, attribution, Baltic Sea, eutrophication, marine acidification
Ämneskategorier Multidisciplinär geovetenskap, Miljövetenskap, Oceanografi, hydrologi, vattenresurser, Meteorologi och atmosfärforskning, Geokemi, Klimatforskning

Sammanfattning

Dramatic climate changes have occurred in the Baltic Sea region caused by changes in orbital movement in the earth–sun system and the melting of the Fennoscandian Ice Sheet. Added to these longer-term changes, changes have occurred at all timescales, caused mainly by variations in large-scale atmospheric pressure systems due to competition between the meandering midlatitude low-pressure systems and highpressure systems. Here we follow the development of climate science of the Baltic Sea from when observations began in the 18th century to the early 21st century. The question of why the water level is sinking around the Baltic Sea coasts could not be answered until the ideas of postglacial uplift and the thermal history of the earth were better understood in the 19th century and periodic behavior in climate related time series attracted scientific interest. Herring and sardine fishing successes and failures have led to investigations of fishery and climate change and to the realization that fisheries themselves have strongly negative effects on the marine environment, calling for international assessment efforts. Scientists later introduced the concept of regime shifts when interpreting their data, attributing these to various causes. The increasing amount of anoxic deep water in the Baltic Sea and eutrophication have prompted debate about what is natural and what is anthropogenic, and the scientific outcome of these debates now forms the basis of international management efforts to reduce nutrient leakage from land. The observed increase in atmospheric CO and its effects on global warming have focused the climate debate on trends and generated a series of international and regional assessments and research programs that have greatly improved our understanding of climate and environmental changes, bolstering the efforts of earth system science, in which both climate and environmental factors are analyzed together.

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