CSEMP assessment of CB28 in sediment at Inner Firth of Clyde, Nth of Cumbrae
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | -15.80 | -11.30 | 10.90 | -21.80 | |||
linear | 2 | -15.99 | -5.32 | 11.99 | -23.99 | 2.182 | 1 | 0.1396 |
smooth (df = 2) | 3 | -14.88 | 10.12 | 12.44 | -24.88 | 0.897 | 1 | 0.3435 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2013 | 0.23369 | -0.07295 | -0.30664 | 0.19237 | -1.594 | 0.1718 |
last 20 years | 1999 | 2013 | 0.23369 | -0.07295 | -0.30664 | 0.19237 | -1.594 | 0.1718 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.9296 | 0.2200 | -1.4412 | 0.1413 | -10.196 | 0.9999 |
EAC | 0.9296 | 1.7000 | 0.6036 | 0.1413 | 4.270 | 0.0040 |
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_se01 (Inner Firth of Clyde, Nth of Cumbrae)
Determinand : CB28
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCInnerCumbraes_se01 (Inner Firth of Clyde, Nth of Cumbrae)
Determinand : CB28
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020