CSEMP assessment of CB180 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 | 124.63 | 126.26 | -59.31 | 118.63 | |||
linear | 2 | 126.63 | 129.83 | -59.31 | 118.63 | 0.000 | 1 | 0.9841 |
smooth (df = 2) | 3 | 128.50 | 134.06 | -59.25 | 118.50 | 0.127 | 1 | 0.7211 |
smooth (df = 3) | 4 | 118.95 | 127.95 | -53.47 | 106.95 | 11.551 | 1 | 0.0007 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2018 | -0.6631 | -0.6719 | -0.0088 | 0.4281 | -0.021 | 0.9839 |
last 20 years | 1999 | 2018 | -0.6631 | -0.6719 | -0.0088 | 0.4281 | -0.021 | 0.9839 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.511 | 0.100 | -1.6307 | 0.2295 | -7.104 | 1.0000 |
EAC | 0.511 | 12.000 | 3.1568 | 0.2295 | 13.753 | <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 : CB180
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 : CB180
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020