CSEMP assessment of phenanthrene 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 | 190.12 | 191.51 | -92.06 | 184.12 | |||
linear | 2 | 190.23 | 192.90 | -91.12 | 182.23 | 1.891 | 1 | 0.1691 |
smooth (df = 2) | 3 | 192.15 | 196.70 | -91.08 | 182.15 | 0.077 | 1 | 0.7807 |
smooth (df = 3) | 4 | 194.15 | 201.35 | -91.08 | 182.15 | 0.002 | 1 | 0.9619 |
smooth (df = 4) | 5 | 195.79 | 206.68 | -90.90 | 181.79 | 0.358 | 1 | 0.5495 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2018 | 5.036 | 4.465 | -0.5711 | 0.4046 | -1.412 | 0.1799 |
last 20 years | 1999 | 2018 | 5.036 | 4.465 | -0.5711 | 0.4046 | -1.412 | 0.1799 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 86.89 | 32.00 | -0.9989 | 0.2204 | -4.533 | 0.9998 |
ERL | 86.89 | 240.00 | 1.0160 | 0.2204 | 4.610 | 0.0002 |
Raw data with supporting information
Raw data with assessment
Assessment plot
PAH (parent) data
PAH (parent) assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for pah_(parent) in sediment
- Accessment criteria for pah_(parent) in sediment
Media : Sediment (< 63 micron fraction)
Station : Firth_of_Forth_(inner)_seSF, inner (Firth of Forth)
Determinand : Phenanthrene
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 : Phenanthrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020