Seasonal and spatial dynamics of 234 Th/ 238 U disequilibria in southern Lake Michigan
Measurements of 234 Th/ 238 U disequilibria were made on an approximately bimonthly basis over the course of a year in nearshore (10–40 m deep) and offshore (160 m deep) surface waters of the southern basin of Lake Michigan (18,100 km 2 ). The mean activity of 238 U in Lake Michigan measured 230 ± 2...
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| Veröffentlicht in: | Journal of Geophysical Research: Oceans 2004-10, Vol.109 (C10) |
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| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | Measurements of
234
Th/
238
U disequilibria were made on an approximately bimonthly basis over the course of a year in nearshore (10–40 m deep) and offshore (160 m deep) surface waters of the southern basin of Lake Michigan (18,100 km
2
). The mean activity of
238
U in Lake Michigan measured 230 ± 20 dpm m
−3
, approximately 1 order of magnitude lower than what is typically found in marine systems. Measured median activities of dissolved ( |
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| ISSN: | 0148-0227 |
| DOI: | 10.1029/2003JC002204 |