CSEMP assessment of CB101 in sediment at inner (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 197.14 | 198.34 | -95.57 | 191.14 | |||
linear | 2 | 198.59 | 200.88 | -95.30 | 190.59 | 0.549 | 1 | 0.4586 |
smooth (df = 2) | 3 | 200.34 | 204.18 | -95.17 | 190.34 | 0.259 | 1 | 0.6111 |
smooth (df = 3) | 4 | 201.68 | 207.68 | -94.84 | 189.68 | 0.655 | 1 | 0.4184 |
smooth (df = 4) | 5 | 201.15 | 210.06 | -93.57 | 187.15 | 2.532 | 1 | 0.1116 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2018 | -0.08351 | 0.16672 | 0.2502 | 0.3337 | 0.750 | 0.4642 |
last 20 years | 1999 | 2018 | -0.08351 | 0.16672 | 0.2502 | 0.3337 | 0.750 | 0.4642 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 1.1814 | 0.1400 | -2.1328 | 0.1817 | -11.735 | 1.0000 |
EAC | 1.1814 | 3.0000 | 0.9319 | 0.1817 | 5.127 | <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_(inner)_seSF, inner (Firth of Clyde)
Determinand : CB101
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : CB101
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020