CSEMP assessment of c2 dibenzothiophene in sediment at Holy Loch (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 57.52 | 58.90 | -25.76 | 51.52 | |||
linear | 2 | 54.33 | 57.00 | -23.17 | 46.33 | 5.185 | 1 | 0.0228 |
smooth (df = 2) | 3 | 53.81 | 58.36 | -21.91 | 43.81 | 2.517 | 1 | 0.1126 |
smooth (df = 3) | 4 | 55.63 | 62.83 | -21.82 | 43.63 | 0.181 | 1 | 0.6704 |
smooth (df = 4) | 5 | 54.65 | 65.54 | -20.32 | 40.65 | 2.985 | 1 | 0.0841 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 4.694 | 3.863 | -0.8313 | 0.3347 | -2.484 | 0.0263 |
last 20 years | 2000 | 2018 | 4.694 | 3.863 | -0.8313 | 0.3347 | -2.484 | 0.0263 |
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 : Clyde_FirthCInnerDunoon_se06, Holy Loch (Clyde)
Determinand : C2 Dibenzothiophene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCInnerDunoon_se06, Holy Loch (Clyde)
Determinand : C2 Dibenzothiophene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020