CSEMP assessment of c2 phenanthrenes 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 | 95.65 | 97.03 | -44.82 | 89.65 | |||
linear | 2 | 88.61 | 91.28 | -40.31 | 80.61 | 9.037 | 1 | 0.0026 |
smooth (df = 2) | 3 | 75.88 | 80.43 | -32.94 | 65.88 | 14.732 | 1 | 0.0001 |
smooth (df = 3) | 4 | 77.69 | 84.89 | -32.84 | 65.69 | 0.192 | 1 | 0.6614 |
smooth (df = 4) | 5 | 78.21 | 89.10 | -32.10 | 64.21 | 1.482 | 1 | 0.2235 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2017 | 5.325 | 4.476 | -0.8482 | 0.1658 | -5.116 | 0.0002 |
last 20 years | 2000 | 2017 | 5.325 | 4.476 | -0.8482 | 0.1658 | -5.116 | 0.0002 |
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_(outer)_seSF, outer (Firth of Clyde)
Determinand : C2 Phenanthrenes
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 : C2 Phenanthrenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020