CSEMP assessment of nickel in sediment at Celtic Deep
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 12.22 | 14.22 | -3.11 | 6.22 | | | |
| linear | 2 | 11.07 | 15.07 | -1.54 | 3.07 | 3.148 | 1 | 0.0760 |
| smooth (df = 2) | 3 | 13.07 | 20.21 | -1.54 | 3.07 | 0.000 | 1 | 0.9899 |
| smooth (df = 3) | 4 | 9.01 | 21.01 | 1.50 | -2.99 | 6.064 | 1 | 0.0138 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2016 | 3.420 | 3.829 | 0.4092 | 0.2145 | 1.907 | 0.0856 |
| last 20 years | 1999 | 2016 | 3.420 | 3.829 | 0.4092 | 0.2145 | 1.907 | 0.0856 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 46.03 | 36.00 | -0.24574 | 0.13738 | -1.789 | 0.9480 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Metals data
Metals assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for metals in sediment
- Accessment criteria for metals in sediment
