CSEMP assessment of c1 dibenzothiophene 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 | 90.48 | 91.87 | -42.24 | 84.48 | |||
linear | 2 | 88.95 | 91.62 | -40.48 | 80.95 | 3.529 | 1 | 0.0603 |
smooth (df = 2) | 3 | 77.95 | 82.50 | -33.98 | 67.95 | 13.000 | 1 | 0.0003 |
smooth (df = 3) | 4 | 79.90 | 87.10 | -33.95 | 67.90 | 0.057 | 1 | 0.8120 |
smooth (df = 4) | 5 | 81.01 | 91.90 | -33.51 | 67.01 | 0.885 | 1 | 0.3470 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2017 | 3.372 | 2.849 | -0.5230 | 0.2035 | -2.570 | 0.0233 |
last 20 years | 2000 | 2017 | 3.372 | 2.849 | -0.5230 | 0.2035 | -2.570 | 0.0233 |
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 Dibenzothiophene
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 Dibenzothiophene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020