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 | 13.55 | 15.35 | -3.78 | 7.55 | | | |
| linear | 2 | 9.95 | 13.51 | -0.97 | 1.95 | 5.601 | 1 | 0.0179 |
| smooth (df = 2) | 3 | 11.80 | 18.05 | -0.90 | 1.80 | 0.154 | 1 | 0.6946 |
| smooth (df = 3) | 4 | 11.45 | 21.74 | 0.27 | -0.55 | 2.341 | 1 | 0.1260 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2018 | 3.394 | 3.946 | 0.5517 | 0.2006 | 2.750 | 0.0189 |
| last 20 years | 1999 | 2018 | 3.394 | 3.946 | 0.5517 | 0.2006 | 2.750 | 0.0189 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 51.7 | 36.0 | -0.3620 | 0.1291 | -2.805 | 0.9914 |
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
