European Directory of Marine Environmental Data (EDMED)

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General
Data set name

Trace Metals in the Sediments in the Gulf of Bothnia and Gulf of Finland (1991-1992)

Data holding centreFinnish Environment Institute
CountryFinland  Finland
Time period1991-1992
OngoingNo
Geographical area

The Gulf of Bothnia, The Bothnian Sea and The Bothnian Bay

Observations 
Parameters

Carbon concentrations in sediment; Nitrogen concentrations in sediment; Inorganic chemical composition of sediment or rocks

Instruments

Sediment grabs; atomic absorption spectrometers; spectrophotometers

Description 
Summary

Gulf of Bothnia: This study has been part of the Gulf of Bothnia year 1991 study. The samples were taken with a gravity corer for soft sediments on board R/V Aranda on different cruises during 1991 - 1992. Some samples near the coastal area were taken on board local boats using Box corers and different kinds of tube samplers used by the local water authorities. Total number of stations were 56; 32 stations in the Bothnian Bay and 24 stations in the Bothnian Sea. The sampling areas in the Gulf of Bothnia include both coastal and open sea areas. The sediment corers were cut into 1 cm subsamples and the five uppermost subsamples were analysed. The total amount of subsamples was 350. The freeze dried and homogenated samples were digested with aqua regia and hydrofluoric acid by microwave oven for elemental analysis. For mercury analyses the samples were digested with nitric acid in an autoclave. 17 elements were analysed by AAS and ICP-AES (including P). C and N were analysed with a carbon-nitrogen analyzer. The quality of analysis were controlled by analysing certified reference materials with the samples. The data set shows the distribution of elements in the sediments in the Gulf of Bothnia. Gulf of Finland: The samples were taken with a gravity corer for soft sediments on board R/V Aranda on different cruises during 1992. Total number of stations were 16. In this study supplementary samples from ICES-HELCOM sediment study 1993; 6 stations. The sediment corers were cut into 1 cm subsamples and the ten uppermost subsamples were analysed. The total amount of subsamples was about 220. The freeze dried and homogenated samples were digested with aqua regia, hydrofluoric acid and boric acid by microwave oven for elemental analysis. For mercury analyses the samples were digested with nitric acid in an autoclave. 17 elements were analysed by AAS and ICP-AES (including P). The quality of analysis were controlled by analysing certified reference materials with the samples. The data set shows the distribution of elements in the sediments in the Gulf of Finland. This is ongoing study which will connect BASYS-study.

OriginatorsFinnish Institute of Marine Research (FIMR)
Availability 
OrganisationFinnish Environment Institute
AvailabilityUnknown
ContactRiitta Olsonen
Address

Finnish Environment Institute
Mechelininkatu 34a
Helsinki

00260
Finland

Telephone+358 40 182 3254
Emailriitta.olsonen@ymparisto.fi
Administration 
Collating centreFinnish Institute of Marine Research (FIMR)
Local identifier19001020
Global identifier2055
Last revised2010-11-22