CSEMP assessment of dibenzothiophene in sediment at Skelmorlie (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 58.38 | 60.18 | -26.19 | 52.38 | |||
linear | 2 | 58.67 | 62.22 | -25.33 | 50.67 | 1.709 | 1 | 0.1911 |
smooth (df = 2) | 3 | 59.79 | 66.04 | -24.89 | 49.79 | 0.882 | 1 | 0.3477 |
smooth (df = 3) | 4 | 60.63 | 70.91 | -24.31 | 48.63 | 1.159 | 1 | 0.2817 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2013 | 2.8197 | 2.3878 | -0.4319 | 0.3238 | -1.334 | 0.2092 |
last 20 years | 2000 | 2013 | 2.8197 | 2.3878 | -0.4319 | 0.3238 | -1.334 | 0.2092 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
ERL | 10.89 | 190.00 | 2.8592 | 0.1956 | 14.615 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
PAH (parent) data
PAH (parent) assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for pah_(parent) in sediment
- Accessment criteria for pah_(parent) in sediment
Media : Sediment (unsieved)
Station : Clyde_FirthCInnerCumbraes_se02, Skelmorlie (Clyde)
Determinand : Dibenzothiophene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCInnerCumbraes_se02, Skelmorlie (Clyde)
Determinand : Dibenzothiophene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020