CSEMP assessment of CB101 in sediment at inner (Firth of Forth)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 137.96 | 139.35 | -65.98 | 131.96 | |||
linear | 2 | 137.51 | 140.18 | -64.75 | 129.51 | 2.454 | 1 | 0.1172 |
smooth (df = 2) | 3 | 139.51 | 144.05 | -64.75 | 129.51 | 0.001 | 1 | 0.9738 |
smooth (df = 3) | 4 | 139.09 | 146.29 | -63.54 | 127.09 | 2.420 | 1 | 0.1198 |
smooth (df = 4) | 5 | 140.19 | 151.08 | -63.10 | 126.19 | 0.898 | 1 | 0.3434 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2018 | -0.3636 | -1.0993 | -0.7356 | 0.4480 | -1.642 | 0.1229 |
last 20 years | 1999 | 2018 | -0.3636 | -1.0993 | -0.7356 | 0.4480 | -1.642 | 0.1229 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.3331 | 0.1400 | -0.8668 | 0.2446 | -3.544 | 0.9984 |
EAC | 0.3331 | 3.0000 | 2.1979 | 0.2446 | 8.987 | <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 (< 63 micron fraction)
Station : Firth_of_Forth_(inner)_seSF, inner (Firth of Forth)
Determinand : CB101
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Forth_(inner)_seSF, inner (Firth of Forth)
Determinand : CB101
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020