CSEMP assessment of phenanthrene in sediment at inner (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
|---|---|---|---|---|---|---|---|---|
| mean | 1 | 210.15 | 211.53 | -102.07 | 204.15 | |||
| linear | 2 | 207.31 | 209.97 | -99.65 | 199.31 | 4.842 | 1 | 0.0278 |
| smooth (df = 2) | 3 | 208.92 | 213.46 | -99.46 | 198.92 | 0.391 | 1 | 0.5318 |
| smooth (df = 3) | 4 | 207.63 | 214.83 | -97.82 | 195.63 | 3.285 | 1 | 0.0699 |
| smooth (df = 4) | 5 | 209.63 | 220.52 | -97.82 | 195.63 | 0.000 | 1 | 0.9968 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 2002 | 2018 | 4.862 | 6.063 | 1.2015 | 0.5088 | 2.361 | 0.0332 |
| last 20 years | 2002 | 2018 | 4.862 | 6.063 | 1.2015 | 0.5088 | 2.361 | 0.0332 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 429.7 | 32.0 | -2.5973 | 0.2854 | -9.101 | 1.0000 |
| ERL | 429.7 | 240.0 | -0.5824 | 0.2854 | -2.041 | 0.9697 |
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for in sediment
- Accessment criteria for in sediment
Media : Sediment (unsieved)
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : Phenanthrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : Phenanthrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020