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Diel variations in iron chemistry in an acidic stream in the Colorado Rocky Mountains, USA

Arctic & Alpine Research

By:
and

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Abstract

In the Snake River the concentration of dissolved iron is apparently unrelated to seasonal changes in hydrologic regime unlike most other dissolved constituents. Hourly sampling indicated short-term fluctuations in iron chemistry, whereas the concentrations of most other dissolved constituents, including other trace metals, remain stable. During the day, greater concentrations of dissolved total and ferrous iron generally occurred during periods of full sunlight. Photoreduction of hydrous iron oxides, which are abundant in the fine sediment and as coatings on the rocks, may be responsible for these observations. Iron chemistry also varied at night, decreasing in dissolved total and ferrous iron until about midnight and increasing until dawn. Oxidation of ferrous iron, and several microbial processes, may contribute to these nightime changes. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Diel variations in iron chemistry in an acidic stream in the Colorado Rocky Mountains, USA
Series title:
Arctic & Alpine Research
Volume
20
Issue:
4
Year Published:
1988
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Arctic & Alpine Research
First page:
492
Last page:
500
Number of Pages:
9