CSEMP assessment of CB153 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 | 113.42 | 114.71 | -53.71 | 107.42 | |||
linear | 2 | 114.74 | 117.20 | -53.37 | 106.74 | 0.689 | 1 | 0.4067 |
smooth (df = 2) | 3 | 108.98 | 113.15 | -49.49 | 98.98 | 7.756 | 1 | 0.0054 |
smooth (df = 3) | 4 | 110.86 | 117.41 | -49.43 | 98.86 | 0.114 | 1 | 0.7356 |
smooth (df = 4) | 5 | 111.00 | 120.80 | -48.50 | 97.00 | 1.860 | 1 | 0.1726 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2017 | 0.01078 | -0.23132 | -0.24209 | 0.28148 | -0.860 | 0.4042 |
last 20 years | 2000 | 2017 | 0.01078 | -0.23132 | -0.24209 | 0.28148 | -0.860 | 0.4042 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.79 | 0.19 | -1.429 | 0.234 | -6.116 | 1.0000 |
EAC | 0.79 | 40.00 | 3.920 | 0.234 | 16.773 | <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 : Firth_of_Clyde_(outer)_seSF, outer (Firth of Clyde)
Determinand : CB153
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 : CB153
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020