CSEMP assessment of CB118 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 | 112.21 | 113.49 | -53.10 | 106.21 | |||
linear | 2 | 110.35 | 112.81 | -51.18 | 102.35 | 3.856 | 1 | 0.0496 |
smooth (df = 2) | 3 | 102.73 | 106.89 | -46.36 | 92.73 | 9.624 | 1 | 0.0019 |
smooth (df = 3) | 4 | 104.72 | 111.27 | -46.36 | 92.72 | 0.006 | 1 | 0.9362 |
smooth (df = 4) | 5 | 104.96 | 114.76 | -45.48 | 90.96 | 1.758 | 1 | 0.1849 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2017 | 0.1011 | -0.5519 | -0.6530 | 0.2625 | -2.488 | 0.0261 |
last 20 years | 2000 | 2017 | 0.1011 | -0.5519 | -0.6530 | 0.2625 | -2.488 | 0.0261 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.5759 | 0.1700 | -1.2201 | 0.2197 | -5.553 | 1.0000 |
EAC | 0.5759 | 0.6000 | 0.0410 | 0.2197 | 0.187 | 0.4272 |
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_(outer)_seSF, outer (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_(outer)_seSF, outer (Firth of Clyde)
Determinand : CB118
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020