CSEMP assessment of c3 phenanthrenes in sediment at middle (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 140.82 | 143.39 | -67.41 | 134.82 | |||
linear | 2 | 142.06 | 147.40 | -67.03 | 134.06 | 0.754 | 1 | 0.3853 |
smooth (df = 2) | 3 | 143.72 | 153.72 | -66.86 | 133.72 | 0.341 | 1 | 0.5591 |
smooth (df = 3) | 4 | 144.46 | 162.46 | -66.23 | 132.46 | 1.258 | 1 | 0.2620 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2009 | 2018 | 4.951 | 4.422 | -0.5290 | 0.5989 | -0.883 | 0.4028 |
last 20 years | 2009 | 2018 | 4.951 | 4.422 | -0.5290 | 0.5989 | -0.883 | 0.4028 |
Status assessment
No assessment criteria
Raw data with supporting information
Raw data with assessment
Assessment plot
PAH (alkylated) data
PAH (alkylated) assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for pah_(alkylated) in sediment
- Accessment criteria for pah_(alkylated) in sediment
Media : Sediment (unsieved)
Station : Firth_of_Clyde_(middle)_seSF, middle (Firth of Clyde)
Determinand : C3 Phenanthrenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(middle)_seSF, middle (Firth of Clyde)
Determinand : C3 Phenanthrenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020