CSEMP assessment of indeno[123-cd]pyrene in sediment at Hunterston (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 130.96 | 132.16 | -62.48 | 124.96 | |||
linear | 2 | 132.52 | 134.80 | -62.26 | 124.52 | 0.444 | 1 | 0.5051 |
smooth (df = 2) | 3 | 133.63 | 137.48 | -61.81 | 123.63 | 0.887 | 1 | 0.3462 |
smooth (df = 3) | 4 | 132.97 | 138.97 | -60.49 | 120.97 | 2.658 | 1 | 0.1030 |
smooth (df = 4) | 5 | 132.55 | 141.45 | -59.27 | 118.55 | 2.425 | 1 | 0.1194 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 5.097 | 4.933 | -0.16385 | 0.24555 | -0.667 | 0.5141 |
last 20 years | 2000 | 2018 | 5.097 | 4.933 | -0.16385 | 0.24555 | -0.667 | 0.5141 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 138.84 | 103.00 | -0.29862 | 0.13074 | -2.284 | 0.9818 |
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_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : Indeno[123-cd]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : Indeno[123-cd]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020