CSEMP assessment of indeno[123-cd]pyrene in sediment at outer (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
|---|---|---|---|---|---|---|---|---|
| mean | 1 | 129.85 | 131.14 | -61.93 | 123.85 | |||
| linear | 2 | 122.26 | 124.72 | -57.13 | 114.26 | 9.596 | 1 | 0.0019 |
| smooth (df = 2) | 3 | 114.33 | 118.49 | -52.16 | 104.33 | 9.929 | 1 | 0.0016 |
| smooth (df = 3) | 4 | 116.33 | 122.87 | -52.16 | 104.33 | 0.002 | 1 | 0.9690 |
| smooth (df = 4) | 5 | 115.78 | 125.58 | -50.89 | 101.78 | 2.544 | 1 | 0.1107 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 2000 | 2017 | 5.376 | 4.549 | -0.8277 | 0.1831 | -4.520 | 0.0005 |
| last 20 years | 2000 | 2017 | 5.376 | 4.549 | -0.8277 | 0.1831 | -4.520 | 0.0005 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 94.49 | 103.00 | 0.08621 | 0.15229 | 0.566 | 0.2901 |
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_(outer)_seSF, outer (Firth of Clyde)
Determinand : Indeno[123-cd]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(outer)_seSF, outer (Firth of Clyde)
Determinand : Indeno[123-cd]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020