CSEMP assessment of CB153 in sediment at Skelmorlie (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 52.38 | 54.18 | -23.19 | 46.38 | |||
linear | 2 | 54.38 | 57.94 | -23.19 | 46.38 | 0.003 | 1 | 0.9591 |
smooth (df = 2) | 3 | 55.39 | 61.64 | -22.70 | 45.39 | 0.989 | 1 | 0.3200 |
smooth (df = 3) | 4 | 52.96 | 63.25 | -20.48 | 40.96 | 4.430 | 1 | 0.0353 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2013 | 0.7266 | 0.7436 | 0.0170 | 0.3313 | 0.051 | 0.9600 |
last 20 years | 2000 | 2013 | 0.7266 | 0.7436 | 0.0170 | 0.3313 | 0.051 | 0.9600 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 2.10 | 0.19 | -2.4043 | 0.1990 | -12.085 | 1.0000 |
EAC | 2.10 | 40.00 | 2.9453 | 0.1990 | 14.804 | <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_FirthCInnerCumbraes_se02, Skelmorlie (Clyde)
Determinand : CB153
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCInnerCumbraes_se02, Skelmorlie (Clyde)
Determinand : CB153
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020