CSEMP assessment of CB52 in sediment at Sea of Hebrides
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 118.81 | 122.41 | -56.41 | 112.81 | |||
linear | 2 | 120.81 | 128.81 | -56.40 | 112.81 | 0.005 | 1 | 0.9438 |
smooth (df = 2) | 3 | 117.36 | 134.02 | -53.68 | 107.36 | 5.449 | 1 | 0.0196 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2006 | 2018 | -2.0113 | -1.9398 | 0.0714 | 0.9818 | 0.073 | 0.9444 |
last 20 years | 2006 | 2018 | -2.0113 | -1.9398 | 0.0714 | 0.9818 | 0.073 | 0.9444 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.1437 | 0.1200 | -0.1804 | 0.6008 | -0.300 | 0.6130 |
EAC | 0.1437 | 2.7000 | 2.9331 | 0.6008 | 4.882 | 0.0014 |
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 : MinchMalin_SeaOfHebrides_se01 (Sea of Hebrides)
Determinand : CB52
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : MinchMalin_SeaOfHebrides_se01 (Sea of Hebrides)
Determinand : CB52
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020