CSEMP assessment of phenanthrene in sediment at Solway Firth
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 133.36 | 134.64 | -63.68 | 127.36 | |||
linear | 2 | 135.30 | 137.76 | -63.65 | 127.30 | 0.063 | 1 | 0.8023 |
smooth (df = 2) | 3 | 131.83 | 135.99 | -60.91 | 121.83 | 5.470 | 1 | 0.0193 |
smooth (df = 3) | 4 | 133.47 | 140.02 | -60.74 | 121.47 | 0.351 | 1 | 0.5537 |
smooth (df = 4) | 5 | 134.70 | 144.50 | -60.35 | 120.70 | 0.773 | 1 | 0.3792 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2001 | 2018 | 5.138 | 5.192 | 0.05355 | 0.21225 | 0.252 | 0.8042 |
last 20 years | 2001 | 2018 | 5.138 | 5.192 | 0.05355 | 0.21225 | 0.252 | 0.8042 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 179.75 | 32.00 | -1.7259 | 0.1259 | -13.705 | 1.0000 |
ERL | 179.75 | 240.00 | 0.2890 | 0.1259 | 2.295 | 0.0183 |
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 : Solway_Firth_seSF (Solway Firth)
Determinand : Phenanthrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Solway_Firth_seSF (Solway Firth)
Determinand : Phenanthrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020