CSEMP assessment of CB156 in sediment at Hunterston (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 106.15 | 108.40 | -50.08 | 100.15 | |||
linear | 2 | 108.15 | 112.72 | -50.08 | 100.15 | 0.003 | 1 | 0.9576 |
smooth (df = 2) | 3 | 108.41 | 116.75 | -49.21 | 98.41 | 1.739 | 1 | 0.1872 |
smooth (df = 3) | 4 | 110.16 | 124.56 | -49.08 | 98.16 | 0.253 | 1 | 0.6152 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2008 | 2018 | -2.4024 | -2.4344 | -0.0320 | 0.6016 | -0.053 | 0.9588 |
last 20 years | 2008 | 2018 | -2.4024 | -2.4344 | -0.0320 | 0.6016 | -0.053 | 0.9588 |
Status assessment
No assessment criteria
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 : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : CB156
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : CB156
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020