| Abstract: | The release of gas in 1986 caused substantial mixing of the stratified water column. After the event rainfall and inflow brought dilute fluid into the surface layer. Inflow and surface mixing have gradually deepened the chemocline. The TDS values in the upper 40 m of the water column have dropped from a few hundred mg/kg just after the release to <100 mg/kg. The chemocline is strongest at 50 m depth; 5 m below this TDS = 570 mg/kg. From 55 to 150 m is a gentle gradient in which TDS reaches 920 mg/kg. Little change in water-column chemistry has occurred in this depth interval since the release. Between 150 m depth and lake bottom at 210 m depth, a strong secondary chemocline has formed. Temperature, CO2 concentration and TDS have all increased in the deepest layer in response to recharge by warm, mineralized water, reaching values of 25??C, 320 mmol/kg, and 1800 mg/kg, respectively, 1 m above lake bottom. Considering all these changes in part as a "recovery‘ process, it is possible to construct a model of the pre-release water column. -from Authors |
| Genre: | Article |
| ProdID: | 70017274 |
| Citation Author: | Evans, W. C.; White, L. D.; Tuttle, M. L.; Kling, G. W.; Tanyileke, G.; Michel, R. L. |
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| Citation End Page: | 162 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geochemical Journal |
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| Citation Number Of Pages: | 24 |
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| Citation Search Results Text: | Six years of change in Lake Nyos, Cameroon, yield clues to the past and cautions for the future; 1994; Article; Journal; Geochemical Journal; Evans, W. C.; White, L. D.; Tuttle, M. L.; Kling, G. W.; Tanyileke, G.; Michel, R. L. |
| Citation Start Page: | 139 |
| Citation Volume: | 28 |
| Citation Year: | 1994 |
| Type: | citation/reference |
| Text: | Six years of change in Lake Nyos, Cameroon, yield clues to the past and cautions for the future; 1994; Article; Journal; Geochemical Journal; Evans, W. C.; White, L. D.; Tuttle, M. L.; Kling, G. W.; Tanyileke, G.; Michel, R. L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
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