CSEMP assessment of CB118 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 | 162.02 | 163.22 | -78.01 | 156.02 | |||
linear | 2 | 162.70 | 164.98 | -77.35 | 154.70 | 1.325 | 1 | 0.2497 |
smooth (df = 2) | 3 | 164.03 | 167.88 | -77.02 | 154.03 | 0.665 | 1 | 0.4148 |
smooth (df = 3) | 4 | 165.25 | 171.25 | -76.62 | 153.25 | 0.784 | 1 | 0.3759 |
smooth (df = 4) | 5 | 164.02 | 172.93 | -75.01 | 150.02 | 3.224 | 1 | 0.0726 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2018 | 0.0269 | 0.3667 | 0.3398 | 0.2880 | 1.180 | 0.2552 |
last 20 years | 1999 | 2018 | 0.0269 | 0.3667 | 0.3398 | 0.2880 | 1.180 | 0.2552 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 1.443 | 0.170 | -2.1387 | 0.1566 | -13.653 | 1.0000 |
EAC | 1.443 | 0.600 | -0.8775 | 0.1566 | -5.602 | 1.0000 |
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 : CB118
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 : CB118
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020