Chemical and Isotope Investigations in Dissolved Gases of a Meromictic Residual Lake
作者:
H.M. Nitzsche,
期刊:
Isotopes in Environmental and Health Studies
(Taylor Available online 1999)
卷期:
Volume 35,
issue 1-2
页码: 63-73
ISSN:1025-6016
年代: 1999
DOI:10.1080/10256019908234079
出版商: Taylor & Francis Group
关键词: Carbon 13;carbon dioxide;dissolved gases;isotope analysis;isotope fractionation;meromictic lake;methane;stratification
数据来源: Taylor
摘要:
Lake Hufeisen near Halle/Saale has been formed in an old mining pit. Its deepest part is trench shaped and filled with water of sodium chloride content. Due to the density difference strong mixing processes in this part of the water body are prevented all over the year (meromictic lake). Therefore anoxic conditions have been established and the organic matter of the lake sediments is converted to carbon dioxide and methane. Over a period of more than one year gas samples were collected from different water depths. The investigations of the chemical composition (mainly nitrogen, carbon dioxide and methane) and the carbon isotope ratios show different relationships for individual species. The results are discussed with respect to the behaviour of the gases in the water column and to the stability of the density stratification in the saline bottom water.
点击下载:
PDF (381KB)
返 回