CSEMP assessment of phenanthrene in sediment at middle (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
|---|---|---|---|---|---|---|---|---|
| mean | 1 | 118.08 | 119.88 | -56.04 | 112.08 | |||
| linear | 2 | 117.45 | 121.00 | -54.72 | 109.45 | 2.628 | 1 | 0.1050 |
| smooth (df = 2) | 3 | 117.54 | 123.79 | -53.77 | 107.54 | 1.903 | 1 | 0.1677 |
| smooth (df = 3) | 4 | 119.12 | 129.41 | -53.56 | 107.12 | 0.420 | 1 | 0.5168 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 2006 | 2018 | 4.123 | 4.638 | 0.5141 | 0.3133 | 1.641 | 0.1290 |
| last 20 years | 2006 | 2018 | 4.123 | 4.638 | 0.5141 | 0.3133 | 1.641 | 0.1290 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 103.3 | 32.0 | -1.1719 | 0.1731 | -6.770 | 1.0000 |
| ERL | 103.3 | 240.0 | 0.8430 | 0.1731 | 4.870 | 0.0002 |
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for in sediment
- Accessment criteria for in sediment
Media : Sediment (< 63 micron fraction)
Station : Firth_of_Clyde_(middle)_seSF, middle (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_(middle)_seSF, middle (Firth of Clyde)
Determinand : Phenanthrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020