CSEMP assessment of c1 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 | 96.80 | 98.18 | -45.40 | 90.80 | |||
linear | 2 | 94.85 | 97.52 | -43.42 | 86.85 | 3.948 | 1 | 0.0469 |
smooth (df = 2) | 3 | 80.53 | 85.07 | -35.26 | 70.53 | 16.324 | 1 | <0.0001 |
smooth (df = 3) | 4 | 82.49 | 89.69 | -35.24 | 70.49 | 0.039 | 1 | 0.8440 |
smooth (df = 4) | 5 | 83.12 | 94.01 | -34.56 | 69.12 | 1.370 | 1 | 0.2418 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2017 | 5.672 | 5.035 | -0.6375 | 0.2128 | -2.995 | 0.0103 |
last 20 years | 2000 | 2017 | 5.672 | 5.035 | -0.6375 | 0.2128 | -2.995 | 0.0103 |
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 : C1 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 : C1 Phenanthrenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020