CSEMP assessment of c3 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 | 84.61 | 86.24 | -39.30 | 78.61 | |||
linear | 2 | 79.37 | 82.57 | -35.68 | 71.37 | 7.240 | 1 | 0.0071 |
smooth (df = 2) | 3 | 71.21 | 76.77 | -30.61 | 61.21 | 10.154 | 1 | 0.0014 |
smooth (df = 3) | 4 | 73.20 | 82.20 | -30.60 | 61.20 | 0.015 | 1 | 0.9039 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2017 | 4.939 | 4.108 | -0.8316 | 0.1972 | -4.216 | 0.0014 |
last 20 years | 2000 | 2017 | 4.939 | 4.108 | -0.8316 | 0.1972 | -4.216 | 0.0014 |
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 : C3 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 : C3 Phenanthrenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020