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Title: Chernobyl {sup 137}Cs used to determine sediment accretion rates at selected northern European coastal wetlands

Sediment cores were collected form five coastal wetlands along the North Sea (England and Netherlands) and Baltic Sea (Poland). {sup 137}Cs dating was used to assess sediment accretion rates, including rates based on the {sup 137}Cs peak from the 1986 accident at Chernobyl. Peaks form the Chernobyl fallout were found in cores from the Oder and Vistula Rivers in Poland, from the Eastern Scheldt in the Netherlands, and in one of the two cores from Stiffkey Marsh, UK. No evidence of Chernobyl fallout was found in cores from Dengie Marsh, UK. The Chernobyl {sup 137}Cs peak serves as an excellent marker for short-term accretion rates because of its high activity. Vertical accretion rates (cm yr{sup {minus}1}) based on 1963 and 1986 peaks were similar at most sites; differences may be due to large inputs of sediment from storms or recent accumulation of organic matter. Large differences in sediment characteristics and accretion rates were found between samples from Poland and western Europe. Vertical accretion rates over the period 1963-1986 ranged from 0.26 to 0.85 cm{sup {minus}1} and from 0.30 to 1.90 cm yr{sup {minus}1} over the 1986-1991 period. Vertical accretion rates for the period these sites are in imminent danger ofmore » excessive flooding. The Chernobyl {sup 137}Cs peak will be especially useful for studies of short-term (i.e. very recent) sedimentation in the near future and for comparisons of sediment processes over different time scales. 33 refs., 4 figs., 4 tabs.« less
Authors:
; ;  [1]
  1. Louisiana State Univ., Baton Rouge, LA (United States)
Publication Date:
OSTI Identifier:
447714
Resource Type:
Journal Article
Resource Relation:
Journal Name: Limnology and Oceanography; Journal Volume: 41; Journal Issue: 3; Other Information: PBD: May 1996
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; WETLANDS; RADIOACTIVITY; CESIUM 137; RADIOECOLOGICAL CONCENTRATION; SEDIMENTS; ISOTOPE DATING; BALTIC SEA; FALLOUT; NETHERLANDS; NORTH SEA; ORGANIC MATTER; POLAND; SEDIMENTATION; WESTERN EUROPE; CLIMATIC CHANGE; RADIATION ACCIDENTS