PUMA
Istituto di Scienze Marine     
Romano S., Mugnai C., Cu N., Giuliani S., Bellucci L. G., Turetta C., Capodaglio G., Albertazzi S., Frignani M. Extreme events and environmental changes: Tracing sedimentary processes in Central Vietnam coastal lagoons. In: Chemistry and Ecology, vol. 29 (2) pp. 166 - 180. TAYLOR & FRANCIS LTD, 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND, 2013.
 
 
Abstract
(English)
Sediment cores, obtained in 2004-2005 and in 2008 from seven coastal lagoons of Central Vietnam (Lang Co, Nuoc Man, Nuoc Ngot, Thi Nai, O Loan, Thuy Trieu and Dam Nai), were analysed to assess changes in Pb-210, porosity, grain size, and depth distributions of selected major and trace elements (Al, As, Ni, and Zn). The aim was to trace sedimentary processes in areas periodically subject to extreme events. The occurrence of lateral sedimentary inhomogeneities has been hypothesised to explain the differences observed at depth for some tracer profiles, whereas topmost levels present evidence that accounts for the loss of a sediment layer (from 2.0 to 7.5cm thick) between the two samplings. These losses might be attributed to major typhoons that impacted the coasts of Central Vietnam during the study period.
DOI: 10.1080/02757540.2012.711321
Subject Pb-210; tracers; environmental changes; typhoons; coastal lagoons; Central Vietnam


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