CSEMP assessment of CB52 in sediment at inner (Firth of Forth)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 107.30 | 109.30 | -50.65 | 101.30 | |||
linear | 2 | 107.61 | 111.61 | -49.81 | 99.61 | 1.690 | 1 | 0.1936 |
smooth (df = 2) | 3 | 107.88 | 115.02 | -48.94 | 97.88 | 1.734 | 1 | 0.1879 |
smooth (df = 3) | 4 | 109.86 | 121.86 | -48.93 | 97.86 | 0.022 | 1 | 0.8831 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2018 | -0.6018 | -1.4411 | -0.8394 | 0.6176 | -1.359 | 0.2039 |
last 20 years | 1999 | 2018 | -0.6018 | -1.4411 | -0.8394 | 0.6176 | -1.359 | 0.2039 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.2367 | 0.1200 | -0.6791 | 0.3321 | -2.045 | 0.9660 |
EAC | 0.2367 | 2.7000 | 2.4344 | 0.3321 | 7.331 | <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 (< 63 micron fraction)
Station : Firth_of_Forth_(inner)_seSF, inner (Firth of Forth)
Determinand : CB52
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Forth_(inner)_seSF, inner (Firth of Forth)
Determinand : CB52
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020