CSEMP assessment of c2 dibenzothiophene in sediment at Garroch Head (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 75.78 | 76.98 | -34.89 | 69.78 | |||
linear | 2 | 71.81 | 74.09 | -31.90 | 63.81 | 5.971 | 1 | 0.0145 |
smooth (df = 2) | 3 | 71.26 | 75.11 | -30.63 | 61.26 | 2.541 | 1 | 0.1109 |
smooth (df = 3) | 4 | 73.19 | 79.19 | -30.60 | 61.19 | 0.071 | 1 | 0.7895 |
smooth (df = 4) | 5 | 72.78 | 81.69 | -29.39 | 58.78 | 2.408 | 1 | 0.1207 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 4.323 | 3.273 | -1.0499 | 0.3914 | -2.682 | 0.0164 |
last 20 years | 2000 | 2018 | 4.323 | 3.273 | -1.0499 | 0.3914 | -2.682 | 0.0164 |
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_FirthCMiddleOffshor_se06, Garroch Head (Clyde)
Determinand : C2 Dibenzothiophene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCMiddleOffshor_se06, Garroch Head (Clyde)
Determinand : C2 Dibenzothiophene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020