CSEMP assessment of phenanthrene in sediment at outer (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 124.24 | 125.52 | -59.12 | 118.24 | |||
linear | 2 | 122.79 | 125.25 | -57.39 | 114.79 | 3.450 | 1 | 0.0632 |
smooth (df = 2) | 3 | 108.57 | 112.74 | -49.28 | 98.57 | 16.218 | 1 | <0.0001 |
smooth (df = 3) | 4 | 110.49 | 117.04 | -49.25 | 98.49 | 0.077 | 1 | 0.7815 |
smooth (df = 4) | 5 | 111.96 | 121.76 | -48.98 | 97.96 | 0.529 | 1 | 0.4670 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2017 | 4.951 | 4.436 | -0.5144 | 0.1870 | -2.752 | 0.0156 |
last 20 years | 2000 | 2017 | 4.951 | 4.436 | -0.5144 | 0.1870 | -2.752 | 0.0156 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 84.45 | 32.00 | -0.9705 | 0.1552 | -6.255 | 1.0000 |
ERL | 84.45 | 240.00 | 1.0444 | 0.1552 | 6.732 | <0.0001 |
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 (unsieved)
Station : Firth_of_Clyde_(outer)_seSF, outer (Firth of Clyde)
Determinand : Phenanthrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(outer)_seSF, outer (Firth of Clyde)
Determinand : Phenanthrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020