CSEMP assessment of phenanthrene in sediment at Holy Loch (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 48.44 | 49.82 | -21.22 | 42.44 | |||
linear | 2 | 48.12 | 50.79 | -20.06 | 40.12 | 2.315 | 1 | 0.1281 |
smooth (df = 2) | 3 | 49.68 | 54.23 | -19.84 | 39.68 | 0.441 | 1 | 0.5069 |
smooth (df = 3) | 4 | 51.36 | 58.56 | -19.68 | 39.36 | 0.321 | 1 | 0.5713 |
smooth (df = 4) | 5 | 50.53 | 61.42 | -18.26 | 36.53 | 2.831 | 1 | 0.0924 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 5.979 | 5.491 | -0.4882 | 0.3109 | -1.570 | 0.1386 |
last 20 years | 2000 | 2018 | 5.979 | 5.491 | -0.4882 | 0.3109 | -1.570 | 0.1386 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 242.45 | 32.00 | -2.0251 | 0.2072 | -9.773 | 1.0000 |
ERL | 242.45 | 240.00 | -0.0101 | 0.2072 | -0.049 | 0.5192 |
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 : Clyde_FirthCInnerDunoon_se06, Holy Loch (Clyde)
Determinand : Phenanthrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCInnerDunoon_se06, Holy Loch (Clyde)
Determinand : Phenanthrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020