BALTIC SEAENVIRONMENT PROCEEDINGS No. 59 - Helcom

The results of this monitoring programme are submitted to
HELCOM in an agreed data format to be stored in the HELCOM
data base which is currently located in the Environmental
Data Centre, Helsinki. The data bank can be used for assessing
the radioactive burden of the Baltic Sea and the dose to
man from the consumption of Baltic Sea food. As an example,
fig. 1 gives the present measuring network for seawater of
Germany. The monitoring of the various compartments of the
Baltic Sea is carried out in each country according to its
technical capability and equipment. Finnland, Germany, Poland
and Russia carry out a monitoring also at locations remote
from land, whereas Denmark and Sweden are more emphasizing on
coastal stations. The laboratories involved in the work of
MORS are as follows:
Denmark
Finnland
Germany
Poland
Russia
Sweden
Ris@ National Laboratory, Roskilde
Finnish Centre for Radiation and Nuclear Safety,
Helsinki (STUK).
Federal Maritime and Hydrographic Agency, Hamburg
(BSH)
Federal Centre for Fisheries Research (BFA/IFG),
Hamburg.
Central Laboratory for Radiological Protection,
Warshaw.
Institute of Meteorology and Water Management,
Gdynia.
V.G. Khlopin Radium Institute, St. Petersburg.
Swedish Radiation Protection Institute, Stockholm.
Environmental Protection Agency (Naturvardsverket),
Stockholm.
Release data of nuclear facilities discharging radionuclides
into the Baltic Sea, are collected annually and stored in the
Finnish Centre for Radiation and Nuclear Safety, Helsinki.
The first comprehensive work of the group MORS was published
in 1989 as I'Baltic Sea Environment Proceedings" No. 31. It
covers the results of the intensive investigations of the
participating laboratories about the impact of the fallout
from the Chernobyl accident on the Baltic Sea (2) from the
year 1986 to 1989.
It was ascertained by the group MORS that the Baltic Sea is
the most contaminated marine environment area by the reactor
accident at Chernobyl. The highest deposition has been found
in the Bothnian Sea, however, due to horizontal advection and
mixing of seawater the initial high contamination in the
southern Bothnian Sea decreased significantly within two
years after the accident. This advection caused increasing
contamination in other sea areas, which were less contaminat-
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