CSEMP assessment of CB180 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 | 120.56 | 122.06 | -57.28 | 114.56 | |||
linear | 2 | 120.62 | 123.53 | -56.31 | 112.62 | 1.933 | 1 | 0.1645 |
smooth (df = 2) | 3 | 114.49 | 119.49 | -52.24 | 104.49 | 8.138 | 1 | 0.0043 |
smooth (df = 3) | 4 | 114.44 | 122.44 | -51.22 | 102.44 | 2.042 | 1 | 0.1530 |
smooth (df = 4) | 5 | 116.02 | 128.27 | -51.01 | 102.02 | 0.424 | 1 | 0.5147 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2017 | -0.9164 | -1.2901 | -0.3737 | 0.2242 | -1.667 | 0.1214 |
last 20 years | 2000 | 2017 | -0.9164 | -1.2901 | -0.3737 | 0.2242 | -1.667 | 0.1214 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.275 | 0.100 | -1.012 | 0.184 | -5.503 | 0.9999 |
EAC | 0.275 | 12.000 | 3.775 | 0.184 | 20.517 | <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 : CB180
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 : CB180
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020