CSEMP assessment of CB180 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 | 181.81 | 183.01 | -87.91 | 175.81 | |||
linear | 2 | 183.81 | 186.10 | -87.91 | 175.81 | 0.001 | 1 | 0.9785 |
smooth (df = 2) | 3 | 185.65 | 189.50 | -87.83 | 175.65 | 0.160 | 1 | 0.6887 |
smooth (df = 3) | 4 | 186.55 | 192.55 | -87.28 | 174.55 | 1.098 | 1 | 0.2947 |
smooth (df = 4) | 5 | 188.42 | 197.33 | -87.21 | 174.42 | 0.136 | 1 | 0.7125 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | -0.5481 | -0.5364 | 0.0117 | 0.4238 | 0.028 | 0.9784 |
last 20 years | 2000 | 2018 | -0.5481 | -0.5364 | 0.0117 | 0.4238 | 0.028 | 0.9784 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.585 | 0.100 | -1.7662 | 0.2300 | -7.679 | 1.0000 |
EAC | 0.585 | 12.000 | 3.0213 | 0.2300 | 13.136 | <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 (unsieved)
Station : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : CB180
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : CB180
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020