CSEMP assessment of CB180 in sediment at Fladen Ground
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 49.07 | 52.67 | -21.54 | 43.07 | |||
linear | 2 | 44.67 | 52.67 | -18.33 | 36.67 | 6.403 | 1 | 0.0114 |
smooth (df = 2) | 3 | 46.13 | 62.80 | -18.07 | 36.13 | 0.535 | 1 | 0.4644 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2005 | 2018 | -2.705 | -3.866 | -1.1601 | 0.4006 | -2.896 | 0.0275 |
last 20 years | 2005 | 2018 | -2.705 | -3.866 | -1.1601 | 0.4006 | -2.896 | 0.0275 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.021 | 0.100 | 1.563 | 0.244 | 6.415 | 0.0003 |
EAC | 0.021 | 12.000 | 6.350 | 0.244 | 26.065 | <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 : Fladen_FlaOpenSea_se04 (Fladen Ground)
Determinand : CB180
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Fladen_FlaOpenSea_se04 (Fladen Ground)
Determinand : CB180
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020