CSEMP assessment of anthracene 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 | 113.34 | 115.91 | -53.67 | 107.34 | |||
| linear | 2 | 111.06 | 116.39 | -51.53 | 103.06 | 4.279 | 1 | 0.0386 |
| smooth (df = 2) | 3 | 111.94 | 121.94 | -50.97 | 101.94 | 1.118 | 1 | 0.2904 |
| smooth (df = 3) | 4 | 113.83 | 131.83 | -50.91 | 101.83 | 0.110 | 1 | 0.7403 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 2009 | 2018 | 3.1577 | 2.6233 | -0.5344 | 0.2556 | -2.090 | 0.0700 |
| last 20 years | 2009 | 2018 | 3.1577 | 2.6233 | -0.5344 | 0.2556 | -2.090 | 0.0700 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 13.78 | 5.00 | -1.0139 | 0.1578 | -6.426 | 0.9999 |
| ERL | 13.78 | 85.00 | 1.8193 | 0.1578 | 11.531 | <0.0001 |
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 : Anthracene
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 : Anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020