CSEMP assessment of CB153 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 | 129.85 | 131.05 | -61.92 | 123.85 | |||
linear | 2 | 128.54 | 130.83 | -60.27 | 120.54 | 3.305 | 1 | 0.0691 |
smooth (df = 2) | 3 | 129.88 | 133.73 | -59.94 | 119.88 | 0.661 | 1 | 0.4164 |
smooth (df = 3) | 4 | 130.03 | 136.03 | -59.02 | 118.03 | 1.850 | 1 | 0.1738 |
smooth (df = 4) | 5 | 127.33 | 136.24 | -56.67 | 113.33 | 4.698 | 1 | 0.0302 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2018 | 0.4010 | 0.9133 | 0.5122 | 0.2680 | 1.912 | 0.0740 |
last 20 years | 1999 | 2018 | 0.4010 | 0.9133 | 0.5122 | 0.2680 | 1.912 | 0.0740 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 2.49 | 0.19 | -2.5740 | 0.1465 | -17.567 | 1.0000 |
EAC | 2.49 | 40.00 | 2.7756 | 0.1465 | 18.943 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for chlorobiphenyls in sediment
- Accessment criteria for chlorobiphenyls in sediment
Media : Sediment (unsieved)
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : CB153
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 : CB153
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020